CN111357169A

CN111357169A - Rotating electrical machine for internal combustion engine, stator thereof, method for manufacturing the same, and method for operating the same

Info

Publication number: CN111357169A
Application number: CN201880074111.3A
Authority: CN
Inventors: 大野正明; 水谷诚一; 山下真吾; 竹山博司
Original assignee: DensoTrim Corp
Current assignee: DensoTrim Corp
Priority date: 2017-11-17
Filing date: 2018-10-11
Publication date: 2020-06-30
Anticipated expiration: 2038-10-11
Also published as: CN111357169B; WO2019097912A1; JP7088956B2; JPWO2019097912A1

Abstract

The engine is an internal combustion engine. The engine generates an engine torque TQe. The phase of the engine torque TQe with respect to the crank angle CA is fixed with respect to the crank angle CA. The rotating electrical machine generates a motor torque TQg. The motor torque TQg has a period T. Motor torque TQg, repeats between motor peak point PKg and motor valley point BTg. The phase of the motor torque TQg relative to the crank angle CA may be adjusted mechanically or electrically. Motor torque TQg is adjusted to suppress behavior that impedes rotation of the internal combustion engine at compression top dead center C-TDC.

Description

Rotating electrical machine for internal combustion engine, stator thereof, method for manufacturing the same, and method for operating the same

Cross Reference to Related Applications

The application takes Japanese patent application No. 2017-222011, which is filed on 17.11.2017, and Japanese patent application No. 2018-066967, which is filed on 30.3.2018, as basic applications, and the disclosures of the basic applications are all incorporated into the application by reference.

Technical Field

The present disclosure relates to a rotating electric machine for an internal combustion engine, a stator thereof, a method of manufacturing the same, and a method of operating the same.

Background

Patent document 1 discloses a rotating electrical machine for an internal combustion engine and a method for manufacturing the same. The rotating electrical machine is connected with the internal combustion engine. The rotating electrical machine provides a portion of the flywheel that provides the inertial mass in the rotating system of the internal combustion engine. The inertial mass not only enables the internal combustion engine to operate continuously, but also affects the fluctuating elements caused by the rotation of the internal combustion engine. The fluctuation elements include various elements such as torque fluctuation, vibration, rotational speed fluctuation, and/or user feeling. Patent documents 2 to 4 exemplify a rectifier circuit for a rotating electrical machine for an internal combustion engine. The disclosures in the prior art documents cited as background art are incorporated by reference into the present application as descriptions of technical elements in the present specification.

Documents of the prior art

Patent document

Patent document 1: JP-A10-4650

Patent document 2: japanese unexamined patent publication Hei 8-8900

Patent document 3: japanese unexamined patent publication No. 11-8946

Patent document 4: japanese laid-open patent publication No. 2001-93680

Disclosure of Invention

Problems to be solved by the invention

The prior art requires flywheel cutting or the like to adjust the inertial mass. However, the adjustment of the inertial mass is limited to dc changes to fluctuating elements, and/or changes in dynamic balance. In view of the above and other points not mentioned above, further improvements are required for the internal combustion engine rotating electric machine, the stator thereof, the manufacturing method thereof, and the operation method thereof.

A rotating electrical machine used in an internal combustion engine uses an outer-pole stator. The coil winding may be provided by an aluminum-based metal. Aluminum-based metals have advantageous properties such as light weight. However, when the coil winding is provided by an aluminum-based metal, it is difficult to provide an industrially practical rotating electrical machine. In view of the above and other points not mentioned above, further improvements are required for the rotating electric machine for an internal combustion engine, the stator thereof, and the manufacturing method thereof.

An object of the present disclosure is to provide a rotating electrical machine for an internal combustion engine, which is easy to rotate in a specific rotation angle region of the internal combustion engine, a manufacturing method thereof, and an operating method thereof.

It is still another object of the present disclosure to provide a rotary electric machine for an internal combustion engine, a method of manufacturing the rotary electric machine, and a method of operating the rotary electric machine for an internal combustion engine, which suppress a motor torque behavior that impedes rotation of the internal combustion engine in a rotation angle region immediately after compression top dead center.

Means for solving the problem

Disclosed is a rotary electric machine for an internal combustion engine, which is connected to a rotating shaft (5) of an internal combustion engine (2), and which is provided with a rotor (21) and a stator (31) that faces the rotor, wherein the motor torque (TQg) consumed to rotate the rotor is adjusted so as to suppress behavior that impedes the rotation of the internal combustion engine at the compression top dead center (C-TDC) of the internal combustion engine.

According to the disclosed rotary electric machine for an internal combustion engine, the motor torque is adjusted. The motor torque is adjusted so as to suppress behavior that hinders rotation of the internal combustion engine at the compression top dead center. Therefore, at the compression top dead center where the loss due to the structure of the internal combustion engine is large, behavior of the motor torque that hinders rotation of the internal combustion engine is suppressed. As a result, a rotating electric machine for an internal combustion engine is provided in which the internal combustion engine is easily rotated in a specific rotation angle region of the internal combustion engine.

Disclosed is a method for manufacturing a rotating electrical machine for an internal combustion engine, which is provided with a rotor (21) that rotates on a rotating shaft (5) of the internal combustion engine (2), and a stator (31) that faces the rotor, and which comprises: a planning step of planning motor torque (TQg) consumed for rotating the rotor so as to suppress behavior that hinders rotation of the internal combustion engine at a compression top dead center (C-TDC) of the internal combustion engine; and a forming stage of forming the rotary electric machine to generate the motor torque planned in the planning stage.

According to the disclosed manufacturing method of a rotating electrical machine for an internal combustion engine, a motor torque consumed for rotating a rotor is planned, and the rotating electrical machine is formed to generate the planned motor torque. The motor torque is intended to suppress behavior that hinders rotation of the internal combustion engine at the compression top dead center of the internal combustion engine. As a result, a method for manufacturing a rotating electric machine for an internal combustion engine is provided in which the internal combustion engine is easily rotated in a specific rotation angle region of the internal combustion engine.

Disclosed is a method for operating a rotating electrical machine for an internal combustion engine, which operates a rotating electrical machine (10) that rotates on a rotating shaft (5) of an internal combustion engine (2), and which comprises: the internal combustion engine is operated to rotate the rotating electric machine by the internal combustion engine, and a motor torque (TQg) consumed for rotating the rotating electric machine is adjusted to generate an adjusted motor torque while suppressing behavior that impedes rotation of the internal combustion engine at a compression top dead center (C-TDC) of the internal combustion engine.

According to the disclosed operating method of the rotating electric machine for an internal combustion engine, the motor torque consumed for rotating the rotating electric machine is adjusted. The motor torque is adjusted so as to suppress behavior that hinders rotation of the internal combustion engine at the compression top dead center of the internal combustion engine. As a result, a method for manufacturing a rotating electric machine for an internal combustion engine is provided in which the internal combustion engine is easily rotated in a specific rotation angle region of the internal combustion engine.

The rotating electric machine for an internal combustion engine and the stator thereof disclosed herein are provided with a coil winding by an aluminum-based metal. Further, the stator core is provided, and the stator core can adjust variations due to mechanical characteristics (vibration, deformation, etc.) of the teeth of the stator core and/or magnetic characteristics (magnetic permeability, magnetic flux density, etc.) of the teeth.

The various modes disclosed in the present specification adopt different technical means to achieve respective purposes. The numerals in parentheses in the claims and claims are merely exemplary for the correspondence with the corresponding portions of the embodiments described below, and are not intended to limit the scope of protection. The objects, features and effects disclosed in the present specification will become more apparent by referring to the following detailed description and accompanying drawings.

Drawings

Fig. 1 is a block diagram of the apparatus of the first embodiment.

Fig. 2 is a waveform diagram showing a crank angle and an engine behavior.

Fig. 3 is a plan view of the rotary electric machine.

Fig. 4 is a waveform diagram showing engine behavior and motor torque.

Fig. 5 is a waveform diagram showing motor torque at the time of opening.

Fig. 6 is a waveform diagram showing motor torque at the time of power supply.

Fig. 7 is an enlarged waveform diagram showing engine behavior and motor torque.

Fig. 8 is a waveform diagram of the second embodiment.

Fig. 9 is an enlarged waveform diagram showing engine behavior and motor torque.

Fig. 10 is an enlarged waveform diagram of the third embodiment.

Fig. 11 is a plan view of a rotary electric machine of the fourth embodiment.

Fig. 12 is a waveform diagram showing engine behavior and motor torque.

Fig. 13 is a waveform diagram showing engine behavior and motor torque.

Fig. 14 is a sectional view of a rotating electric machine according to a fifth embodiment.

Fig. 15 is a plan view of the rotary electric machine.

Fig. 16 is a plan view of the stator.

Fig. 17 is a perspective view of the insulator.

Fig. 18 is a plan view showing one tooth.

Fig. 19 is a waveform diagram showing performance at the time of transition in fig. 18.

Fig. 20 is a waveform diagram in which a part of fig. 19 is enlarged.

Fig. 21 is a waveform diagram in which a part of fig. 19 is enlarged.

Fig. 22 is a plan view showing one tooth.

Fig. 23 is a waveform diagram showing performance at the time of transition in fig. 22.

Fig. 24 is a waveform diagram in which a part of fig. 23 is enlarged.

Fig. 25 is a waveform diagram in which a part of fig. 23 is enlarged.

Fig. 26 is a plan view showing one tooth.

Fig. 27 is a waveform diagram showing performance at the time of transition in fig. 26.

Fig. 28 is a waveform diagram in which a part of fig. 27 is enlarged.

Fig. 29 is a waveform diagram in which a part of fig. 27 is enlarged.

Fig. 30 is a plan view showing one tooth.

Fig. 31 is a waveform diagram showing performance at the time of transition in fig. 30.

Fig. 32 is a waveform diagram in which a part of fig. 31 is enlarged.

Fig. 33 is a waveform diagram in which a part of fig. 31 is enlarged.

Fig. 34 is a plan view showing one tooth.

Fig. 35 is a waveform diagram showing performance at the time of transition in fig. 34.

Fig. 36 is a waveform diagram in which a part of fig. 35 is enlarged.

Fig. 37 is a waveform diagram in which a part of fig. 35 is enlarged.

Fig. 38 is a plan view showing one tooth.

Fig. 39 is a waveform diagram showing the performance at the transition in fig. 38.

Fig. 40 is a waveform diagram in which a part of fig. 39 is enlarged.

Fig. 41 is a waveform diagram in which a part of fig. 39 is enlarged.

Fig. 42 is a plan view showing one tooth.

Fig. 43 is a waveform diagram showing performance at the transition in fig. 42.

Fig. 44 is a waveform diagram in which a part of fig. 43 is enlarged.

Fig. 45 is a waveform diagram in which a part of fig. 43 is enlarged.

Fig. 46 is a plan view of the stator core having circular fitting portions (forged traces) at all the tooth root portions.

Fig. 47 is a plan view of the stator core having square fitting portions (forged marks) at all the tooth root portions.

Fig. 48 is a plan view of the stator core having linear trapezoidal connecting portions at all the tooth root portions.

Fig. 49 is a cross-sectional view of a stator with an aluminum-based coil winding wound to form more layers at the root of the teeth than at the distal ends of the teeth.

Fig. 50 is a plan view of a ring-shaped stator core in which the outer periphery of a plurality of teeth is continuous.

Fig. 51 is a sectional view of a stator in which a resin spacer is disposed between adjacent teeth.

Fig. 52 is a sectional view of a stator in which resin is filled between a plurality of teeth and a coil.

Fig. 53 is a plan view of a stator core having radially extending slots radially outward of teeth.

Fig. 54 is a plan view of a stator core of other embodiments.

Detailed Description

The embodiments are described with reference to the drawings. In each embodiment, functionally and/or structurally corresponding portions and/or associated portions are sometimes denoted by the same reference numerals or by reference numerals differing only in digits of hundreds or more. With regard to the corresponding components and/or associated components, reference may be made to the description in the other embodiments.

First embodiment

In fig. 1, an internal combustion engine system 1 includes an internal combustion engine 2 (engine) and a rotating electrical machine for the internal combustion engine (hereinafter, simply referred to as a rotating electrical machine 10). The engine 2 is a so-called four-stroke reciprocating engine. An engine 2 has a cylinder 3 and a piston 4. The engine 2 has a connecting rod 6 connecting the piston 4 and the rotary shaft 5. The engine 2 has a valve system 7, which valve system 7 comprises an inlet valve, an exhaust valve and a camshaft. The valve system 7 provides a four-stroke action. The engine 2 has an interlocking system 8 for interlocking the rotary shaft 5 with the valve system 7. The engine 2 is a single cylinder. However, the engine 2 is not limited to a single cylinder.

One example of the use of the rotating electrical machine 10 is a generator driven by the engine 2. The rotating electric machine 10 is attached to the internal combustion engine and is interlocked with the engine 2. The engine 2 is a vehicle engine mounted in a vehicle or a general-purpose engine. Here, the term "vehicle" should be interpreted broadly, and includes moving objects such as vehicles, ships, airplanes, and fixed objects such as entertainment equipment and simulation equipment. Further, the general-purpose engine can be used as, for example, a generator and a pump. In the present embodiment, the engine 2 is mounted on a saddle-ride type vehicle.

The rotating electric machine 10 is electrically connected to the circuit 11. The circuit 11 includes a Rectifier Circuit (RCF) and an open regulator circuit that regulates the output voltage. The circuit 11 includes a battery and/or an electrical load that utilizes single-phase power.

The rotating electric machine 10 is assembled to the engine 2. An engine 2 has a body 9 and a rotary shaft 5 rotatably supported by the body 9. The rotating electric machine 10 is assembled to the body 9 and the rotating shaft 5. The body 9 is a structure such as a crankcase or a transmission of the engine 2. The rotation shaft 5 may be provided by a crankshaft of the engine 2 or a rotation shaft linked with the crankshaft.

The rotating electric machine 10 is an outer rotor type rotating electric machine. A rotating electric machine (10) is provided with a rotor (21) and a stator (31). In the following description, the term "axial direction" refers to a direction along the central axis of the rotor 21, the stator 31, or the stator core 32 when they are regarded as cylinders. The term "radial direction" refers to a diameter direction when the rotor 21, the stator 31, or the stator core 32 is regarded as a cylindrical body.

The rotor 21 is a field element. The stator 31 is an armature. The rotor 21 is cup-shaped as a whole. The rotor 21 is connected to an end of the rotating shaft 5. The rotor 21 rotates together with the rotary shaft 5. The rotor 21 is rotated by the engine 2. A gap is formed between the rotor 21 and the stator 31 in the radial direction and the axial direction. In order to compactly construct the rotary electric machine 10, the clearance associated with the stator 31 is preferably small. And a rotor 21 having a cup-shaped rotor core 22. The rotor core 22 provides a yoke for a permanent magnet to be described later. And a rotor core 22 made of a magnetic metal. The rotor 21 has a permanent magnet 23 disposed on the inner surface of the rotor core 22. The rotor 21 is provided with a magnetic field by a permanent magnet 23.

The stator 31 is an annular member. The stator 31 is disposed opposite to the rotor 21. The stator 31 has a stator core 32. The stator core 32 is provided by a laminated body of magnetic metals such as electromagnetic steel sheets. Stator core 32 is fixed to body 9. The stator 31 has a stator coil 33 mounted on a stator core 32. Stator coil 33, providing an armature winding. The stator coil 33 is a single-phase winding or a multi-phase winding. The stator coil 33 causes the rotor 21 and the stator 31 to function as a generator. The coil wire forming the stator coil 33 is a single wire conductor covered with an insulating coating. The coil wire is made of an aluminum-based metal such as aluminum or an aluminum alloy.

The rotary electric machine 10 includes a wire harness 15, the wire harness 15 providing electrical connection between the rotary electric machine 10 and the circuit 11. The wire harness 15 is a wire having more excellent flexibility than the coil lead. The wire harness 15 includes a plurality of electric wires. Each electric wire is a coated wire formed by coating a bundle of a plurality of thin wires with a resin coating. Each thin wire is made of copper-based metal or aluminum-based metal.

Wire harness 15 includes a plurality of power lines connecting stator coil 33 and circuit 11. The circuit 11 is an external circuit connected to a power line. The power line supplies the electric power induced by the stator coil 33 to the electric circuit 11 when the rotating electric machine 10 is used as a generator.

The circuit 11 includes a rectifier circuit 11a (rcf), a battery 11b (bt), and a load 11c (lt). The battery 11b is a secondary battery charged by the rotating electric machine 10. The battery 11b supplies electric power for starting the engine 2 and/or electric power of the load 11 c. The load 11c is a lamp such as a headlight or a direction indicator, an ignition device of the engine 2, or the like. The rectifier circuit 11a includes switching

elements

11d and 11e (sw) as rectifier elements for rectifying the half-wave component, and a control device 11f (cnt). The

switching elements

11d and 11e are provided by, for example, thyristor elements and transistor elements. For example, the switching element 11d provides a half-wave rectifier circuit that supplies a positive half-wave component to the battery 11 b. For example, the switching element 11e provides a half-wave rectifier circuit that supplies a negative half-wave component to the load 11 c.

The control device 11f is provided by an analog circuit or a digital circuit. The control device 11f controls the on/off of the

switching elements

11d and 11e, thereby controlling the period of time during which power is supplied from the rotating electric machine 10 to the battery 11b or the load 11 c. Therefore, the rectifier circuit 11a is also a regulator circuit that controls the power supply from the rotating electric machine 10. The descriptions of patent documents 2 to 4 are incorporated by reference in the present application as a part of the description of the present specification.

The control device 11f includes at least one arithmetic processing unit (CPU) and at least one memory device (MMR) as a storage medium for storing programs and data. The control device 11f is provided by a microcomputer including a computer-readable storage medium. The storage medium is a non-transitory tangible storage medium that non-temporarily stores a computer-readable program. The storage medium may be provided by a semiconductor memory, or a magnetic disk, or the like. The control means 11f may be provided by a computer or a set of computer resources linked by data communication equipment. The program is executed by the control device 11f so that the control device 11f functions as a device described in the present specification, and the control device 11f functions to execute the method described in the present specification.

A control device 11f, a signal source, and a controlled object, providing a control system. The control system provides various elements. At least some of these elements may be referred to as blocks for performing functions. It is also considered that at least some of these elements may be referred to as modules or portions of structure. Further, the elements included in the control system may be referred to as means for realizing the functions thereof only in a deliberate case.

The means and/or functions provided by the control system may be provided by software recorded in the physical storage device and a computer executing it, software only, hardware only, or a combination thereof. For example, when the control means is provided by an electronic circuit as hardware, it may be provided by a digital circuit including a plurality of logic circuits, or an analog circuit.

In fig. 2, the upper section shows the torque tq (nm) of the engine 2, and the lower section shows the force f (n) acting on the pistons of the engine 2. The horizontal axis represents the crank angle CA. The engine 2 repeats a combustion stroke (POW), an exhaust stroke (EXH), an intake stroke (INT), and a compression stroke (COM) in this order. The engine 2 passes through a combustion bottom dead center (P-BDC), an exhaust top dead center (E-TDC), an intake bottom dead center (I-TDC), and a compression top dead center (C-TDC), in this order. In the following description, the compression top dead center is mainly referred to as a Top Dead Center (TDC). The crank angle CA is set so that the exhaust top dead center E-TDC becomes 0 degree.

The engine torque TQe shows a waveform in a typical operating state of the engine 2. The typical operating state is, for example, a state in which a predetermined load is applied to the engine 2 and the engine is operated at a usual rotation speed (for example, 3000 rpm). The waveform of the engine torque TQe varies depending on the operation state. The phase of the engine torque TQe with respect to the crank angle CA is fixed with respect to the crank angle CA. The typical operating state may be an operating state in which the fluctuation element of the engine 2 is most significantly exhibited.

The torque TQ of the engine 2 is observed as a rotational torque on the rotary shaft 5. The engine torque TQe shown by the solid line is generated by combining the inertia torque shown by the one-dot chain line and the air pressure torque shown by the broken line. The engine torque TQe is also referred to as a synthesized torque. The two-dot chain line indicates the average torque. At this time, the force F acting on the piston is also a force acting in the advancing direction of the piston 4. The force F shown in solid lines is generated by combining the inertial force shown in a one-dot chain line and the force by the air pressure shown in a broken line.

The force F acting on the piston is converted into a torque TQ by the crank mechanism of the engine 2. Therefore, the torque TQ is small near the top dead center (C-TDC), particularly after the top dead center, but the force F acting on the piston 4 is large. In this region (near top dead center (C-TDC), particularly after top dead center), combustion in the cylinder proceeds to some extent, and high temperature and high pressure have been generated accompanying the combustion. Since this region is a region where high temperature and high pressure are maintained, the cooling loss is large, and the load on the rotating portion of the engine 2, that is, the plurality of bearings is also large. Therefore, the frictional loss of the engine 2 is also large. In this region, it is preferable that the torque for driving the rotary electric machine 10 is small. Since the engine 2 can be smoothly rotated by a small torque, the engine 2 can smoothly pass through the above-described region. This smooth passage helps to reduce losses. On the other hand, high temperature and high pressure are also generated in the cylinder in the region before the top dead center (C-TDC). However, the region before the top dead center is a process in which the temperature and the pressure gradually increase due to the gradual progress of combustion. Therefore, in the region before the top dead center, even if the torque of the rotary electric machine 10 is high, the influence on the engine 2 is small as compared with after the top dead center. This characteristic effect is not clearly visible in other regions than near top dead center.

In fig. 3, the rotor 21 includes a cylindrical rotor core 22 and a plurality of permanent magnets 23. The rotor core 22 has a through hole 21a for receiving the rotary shaft 5. The rotor core 22 has a rotor positioning portion 21b, and the rotor positioning portion 21b positions the rotor 21 in the rotational direction with respect to the rotary shaft 5. The rotor positioning portion 21b is provided by a key mechanism that provides engagement of the through hole 21a with the rotary shaft 5. The rotary shaft 5 also has a key mechanism for the rotor positioning portion 21 b.

The stator 31 is an outer stator. The stator core 32 has a plurality of magnetic poles. The magnetic poles are also known as salient poles or teeth. The stator 31 has a through hole 31a in the center. The stator 31 has a plurality of stator positioning portions 31 b. And a stator positioning portion 31b provided by a through hole for receiving a bolt for fixing the stator 31 to the body 9. The body 9 is also provided with bolt holes for the stator positioning portions 31 b.

The plurality of permanent magnets 23 includes 12 permanent magnets 23. Thus, the rotor 21 provides 6 pairs of 12 poles of magnetic poles. The stator 31 provides 12 magnetic poles. The number of poles of the rotor 21 and the number of poles of the stator 31 are not limited to those in the present embodiment, and may be provided by a combination of a plurality of numbers. The stator coil 33 is a single-phase winding.

In fig. 3, the mechanical phase of the rotating electrical machine 10 with respect to the engine 2 may be changed by various methods. The rotation angle of the engine 2 is represented by the rotation angle of the rotary shaft 5. The rotation angle of the rotating electrical machine 10 can be represented by the rotation angle of the rotor 21 with respect to the rotation angle of the rotating shaft 5. The rotation angle of the rotating electrical machine 10 can be represented by a fixed angle of the stator 31 with respect to the rotation angle (reference position) of the rotating shaft 5. The rotation angle of the rotating electrical machine 10 can be represented by the position of the stator 31 in the circumferential direction with respect to the rotating shaft 5. The rotation angle of the rotating electrical machine 10 can also be represented by the position of the permanent magnet 23 relative to the rotor core 22. The rotation angle of the rotating electrical machine 10 with respect to the rotating shaft 5 can be represented by the magnetization position of the rotor 21 (the position of the plurality of permanent magnets 23 in the circumferential direction with respect to the rotor core 22), the position of the rotor 21 in the rotation direction, and the position of the stator 31 in the circumferential direction.

Likewise, the mechanical phase of the rotating electrical machine 10 with respect to the engine 2 can be changed by various methods. For example, the mechanical phase may be changed by changing the magnetization position of the rotor 21 (the position of the plurality of permanent magnets 23 with respect to the rotor core 22 in the circumferential direction), the position of the rotor 21 in the rotational direction, and the position of the stator 31 in the circumferential direction. The phase of the rotary electric machine 10 with respect to the engine 2 is not limited to the method illustrated here, and can be changed by other various methods.

The phase of the rotating electrical machine 10 with respect to the engine 2 can be changed by shifting the positions of the plurality of permanent magnets 23 in the circumferential direction. For example, it can be changed by changing the position of one permanent magnet 23 from the position 23a shown by the broken line. The trace of the change in the magnetization position of the rotor 21 may be represented by a deviation 23s between the position of the rotor positioning portion 21b in the rotational direction and the actual reference position 23b of the plurality of permanent magnets 23 in the rotational direction.

The phase of the rotating electrical machine 10 with respect to the engine 2 can be changed by changing the position of the rotor positioning portion 21b to the position 21b 1. The phase of the rotating electrical machine 10 relative to the engine 2 can be changed by changing the position of the stator positioning portion 31b and the position 31b 1. 2 or more of the above-described methods may be combined.

The phase of the rotation angle of the rotor 21 with respect to the rotation angle of the rotary shaft 5 is relatively adjusted by the planned arrangement of the positions of the rotor positioning portions 21 b. The phase of the circumferential angle of the stator 31 with respect to the rotation angle of the rotating shaft 5 is relatively adjusted by the planned arrangement of the positions of the stator positioning portions 31 b. The phase of the circumferential angle of the rotor 21 with respect to the rotation angle of the rotary shaft 5 is relatively adjusted by planned arrangement of the positions of the plurality of permanent magnets 23 (the positions of the magnetic poles) with respect to the rotor core 22. As a result, the phase of the rotation angle of the rotating electric machine 10 with respect to the rotation angle of the rotating shaft 5 can be relatively adjusted. Thereby, the phase of the motor torque consumed for driving the rotating electric machine 10 with respect to the engine torque generated by the engine 2 is set to a predetermined value.

For a model produced in mass, the mechanical phase of the rotating electrical machine 10 with respect to the engine 2 is defined in the design phase. The mechanical phase of the rotating electrical machine 10 with respect to the engine 2 may vary from model to model. This is because there is a difference in the characteristics of the fluctuation element required in the plurality of models. For example, in one model, the mechanical phase of the rotating electrical machine 10 with respect to the engine 2 is defined to suppress a fluctuation element including the engine torque. For example, in another model, the phase of the rotary electric machine 10 with respect to the engine 2 is defined to emphasize or amplify a fluctuation element including the engine torque.

The phase of the rotating electrical machine 10 with respect to the engine 2 is defined so as to intentionally suppress or emphasize a fluctuation element of the engine 2. The phase of the rotating electrical machine 10 with respect to the engine 2 is defined as an appropriate change of the ripple element imparted to the engine 2.

In the present embodiment, the phase of the rotary electric machine 10 with respect to the engine 2 is adjusted to suppress a decrease in the output torque of the engine 2. The term "adjustment" refers to adjustment during a planning stage prior to manufacture. The term "adjustment" may also include adjustment by a variable mechanism after manufacture. The phase of the rotating electrical machine 10 includes a mechanical phase of the rotating electrical machine 10 with respect to the rotating shaft 5 of the engine 2, a phase of an electrical action of the rotating electrical machine 10, and a phase of a magnetic action of the rotating electrical machine 10. Here, the phase of the fluctuation component generated in the engine 2 is not changed. The phase of the ripple component generated in the rotating electrical machine 10 is set to a planned value by adjusting the relative positional relationship between the rotor 21 and the stator 31.

The method of manufacturing a rotating electrical machine for an internal combustion engine includes an assembly step of fixing the rotor 21 and the stator 31 to the engine 2. The manufacturing method has a component manufacturing stage including a stage of manufacturing the rotor 21 before the assembly stage, and a stage of manufacturing the stator 31. The manufacturing method further includes a planning stage of planning a phase of the rotating electrical machine 10 with respect to the engine 2 before the component manufacturing stage.

In the planning stage, motor torque TQg consumed for rotating the rotor 21 is planned. The motor torque TQg is planned in the planning stage so as to suppress the behavior of the internal combustion engine 2 that hinders the rotation at the compression top dead center C-TDC of the internal combustion engine 2. The planning stage may be a stage of planning the phase of the rotating electrical machine 10 with respect to the engine 2 to suppress or emphasize the fluctuation elements of the engine 2. For example, the positions of the magnetic poles of the rotor 21 with respect to the rotation angle of the rotating shaft 5 are planned. This is achieved by planning the positions of the plurality of permanent magnets 23 with respect to the rotor core 22 or the positions of the rotor positioning portions 21 b. For example, the positions of the magnetic poles of the stator 31 with respect to the rotation angle of the rotating shaft 5 are planned. This is achieved by planning the fixing position of the stator 31 with respect to the rotation angle of the rotating shaft 5, that is, the position of the stator positioning portion 31 b.

The component manufacturing stage following the planning stage includes a forming stage in which the rotor 21 and the stator 31 are formed to achieve the phase of the rotary electric machine 10 with respect to the engine 2 planned in the planning stage. The forming stage is also a stage of forming the rotary electric machine 10 to produce the motor torque TQg planned in the planning stage. The forming stage may sometimes include a stage of fixing the permanent magnet 23 to a planned position with respect to the rotor core 22 (a stage of determining a magnetization position providing a plurality of magnetic poles). The forming stage may sometimes include a stage of forming the rotor positioning portion 21b at a planned position. The forming stage may sometimes include a stage of forming the stator positioning portion 31b at a planned position. As a result, the rotor and/or stator of the rotating electrical machine is formed in the forming stage such that the rotating electrical machine rotates with the phase planned in the planning stage.

The forming stage may be provided by a stage of forming magnetic poles on the rotor 21. The forming step is also a step of forming a deviation 23s in the rotational direction between the rotational direction position of the rotor positioning portion 21b and the reference position 23b of the permanent magnet 23 (magnetic pole). This deviation 23s is also a trace of the change in the magnetization position of the rotor 21.

Fig. 4 is a waveform diagram showing the engine torque TQe output by the engine 2 and the motor torque TQg consumed by the rotary electric machine 10 to generate electric power. In the following drawings, the compression top dead center C-TDC is used as the origin. Therefore, the crank angle CA starts from 540 degrees.

The waveform of the motor torque TQg changes according to the operating state of the rotating electric machine 10. The phase of the motor torque TQg relative to the crank angle CA can be adjusted by changing the fixed position of the rotor 21 and/or the stator 31 relative to the engine 2. These fixed positions are set so as to intentionally suppress, or emphasize, the fluctuation elements of the engine 2.

The engine torque TQe rises rapidly during a period including the compression top dead center C — TDC. The engine torque TQe reaches the maximum value, i.e., the engine peak point PKe, due to the explosive combustion immediately after the compression top dead center C — TDC.

The motor torque TQg has a periodic alternating current component caused by a plurality of magnetic poles of the rotor 21 and the stator 31. During the operation cycle of the internal combustion engine 2, i.e., 720CA, the motor torque TQg is repeated between the plurality of motor peak points PKg, which are maximum values, and the plurality of motor valley points BTg, which are minimum values. Motor torque TQg reverses direction at zero crossing point ZCg. The plurality of zero-crossing points ZCg have a zero-crossing point ZCg during a fall of the motor torque TQg and a zero-crossing point ZCg during a rise of the motor torque TQg.

In the present embodiment, the phase of the rotary electric machine 10 with respect to the engine 2 is adjusted so as to smooth the rotation of the engine 2 immediately after the compression top dead center C-TDC. At a position between the compression top dead center C-TDC and the engine peak point PKe, and the crank angle CA slightly exceeds the compression top dead center C-TDC, the engine torque TQe is in the rising process, but is very small. In this region, the effective engine torque TQe is deprived of the motor torque TQg, and may prevent smooth rotation of the engine. Therefore, the most preferable state is to keep the motor torque TQg in a relatively low state until the engine torque TQe sufficiently increases. For example, most preferably, in crank angle CA, motor torque TQg is adjusted to the phase that maximizes the period of time below the average value of compression top dead center C-TDC and subsequent compression top dead center C-TDC.

In the present embodiment, the phase adjustment is performed such that one of the zero-cross points ZCg during the fall of the motor torque TQg is generated at the compression top dead center C-TDC. As a result, motor torque TQg near compression top dead center C-TDC is suppressed. In particular, motor torque TQg is inhibited shortly after compression top dead center C-TDC. The suppression of the motor torque TQg represents the suppression of the torque consumed by the rotating electric machine 10. Therefore, the rotation of the engine 2 can be smoothly performed shortly after the compression top dead center C-TDC.

This allows smooth rotation of the engine 2 to be obtained in the vicinity of the compression top dead center C-TDC. The smooth rotation of the engine 2 also contributes to suppression of knocking and excessive progress of combustion.

Fig. 5 shows waveforms when the output of the rotating electric machine 10 is open. Even if the output of the rotating electrical machine 10 is in the open state, the same waveform as described above can be observed.

Fig. 6 shows a waveform when the output of the rotary electric machine 10 is controlled by the rectifier circuit 11a and power is supplied. The motor torque TQg fluctuates greatly due to the switching of the switching elements 10d, 10 e. The motor torque TQg fluctuates greatly due to fluctuations in output. The motor torque TQg, when powered, also hits the motor valley point BTg shortly after compression top dead center C-TDC. Therefore, even if the output is controlled by the circuit 11, the motor torque TQg is suppressed shortly after the compression top dead center C-TDC.

Fig. 7 is an enlarged waveform diagram shortly after the compression top dead center C-TDC. One of the zero-crossing points ZCg during the fall of the motor torque TQg is generated at compression top dead center C-TDC. Also, the first valley point BTg shortly after compression top dead center C-TDC occurs before the engine peak point Pke. As a result, the motor torque TQg decreases immediately after the compression top dead center C — TDC, in which the absolute value of the engine torque TQe is small. Therefore, the motor torque TQg does not interfere with the rotation of the engine 2. Also, in the gradual increase of the absolute value of the engine torque TQe immediately after the compression top dead center C — TDC, the motor torque TQg further decreases. Therefore, the motor torque TQg does not further hinder the rotation of the engine 2. Further, since the motor valley point BTg is encountered before the engine peak point Pke is reached, the engine torque TQe smoothly rises toward the engine peak point PKe.

The present embodiment provides an operation method of the rotating electrical machine 10 that is operated and rotated by the rotating shaft 5 of the internal combustion engine 2. The operation method includes a stage of operating the internal combustion engine 2 and a stage of rotating the rotary electric machine 10 by the internal combustion engine 2. The phase of rotating the rotating electrical machine 10 is also the phase of rotating the rotor 21. The operation method comprises the following steps: the motor torque TQg is adjusted to suppress the behavior of the internal combustion engine 2 that hinders the rotation at the compression top dead center C-TDC of the internal combustion engine 2, and the adjusted motor torque TQg is generated. The adjustment phase is adjusted by the phase associated with the rotor 21 and/or the stator 31, and/or by the current flowing through the stator 31. The phase associated with the rotor 21 and/or the stator 31 may be represented by a mechanical phase, or an electrical phase, relative to the axis of rotation 5. The current flowing through the stator 31 can be adjusted by the impedance of the circuit 11.

The present embodiment provides a rotating electrical machine 10. The rotating electrical machine 10 is connected to the rotating shaft 5 of the internal combustion engine 2. The rotating electric machine 10 includes a rotor 21 and a stator 31 opposed to the rotor 21. Further, the rotary electric machine 10 defines a motor torque TQg consumed for rotating the rotor 21. The motor torque TQg is adjusted to suppress the behavior of the internal combustion engine 2 that hinders the rotation thereof at the compression top dead center C-TDC of the internal combustion engine 2. As a result, the motor torque TQg is suppressed before and after the compression top dead center C-TDC, and the behavior of the motor torque TQg that hinders the rotation of the internal combustion engine 2 is suppressed.

In the present embodiment, the motor torque TQg is adjusted to be lower than the motor peak point PKg, which is the maximum value, immediately after the compression top dead center C-TDC of the internal combustion engine 2. Thereby, the case where the motor peak point PKg hinders the rotation of the internal combustion engine 2 is avoided. The period immediately after is a period after compression top dead center C-TDC until engine torque TQe of internal combustion engine 2 reaches a maximum value, that is, engine peak point PKe. As a result, the rotation of the internal combustion engine 2 is prevented from being hindered by the rotating electric machine 10 while the engine torque TQe starts to increase from a small absolute value.

One view is that the motor torque TQg fluctuates via a plurality of zero crossings ZCg that intersect the average. Motor torque TQg is adjusted to be one of zero crossings ZCg during the fall of compression top dead center C-TDC, producing motor torque TQg. As a result, the motor torque TQg is suppressed before and after the compression top dead center C-TDC, and the behavior of the motor torque TQg that hinders the rotation of the internal combustion engine 2 is suppressed. From another viewpoint, the motor torque TQg has a period T that increases and decreases repeatedly a plurality of times during the operating period (720CA) of the internal combustion engine 2. The motor torque TQg has a low torque period in which the motor torque TQg is relatively low, shortly after the compression top dead center C-TDC of the internal combustion engine 2.

Motor torque TQg, is adjusted by a phase associated with rotor 21 and/or stator 31. Motor torque TQg may be adjusted by the current flowing through stator 31. Motor torque TQg is adjusted by the position of the magnetic poles in rotor 21. The motor torque TQg can be adjusted by positioning the rotor 21 at the position of the rotor positioning portion 21b of the internal combustion engine 2. The motor torque TQg can be adjusted by positioning the stator 31 at the position of the stator positioning portion 31b of the internal combustion engine 2.

According to the embodiment described above, there is provided the rotating electrical machine for an internal combustion engine that assists the smooth rotation of the engine 2 by adjusting the phase of the rotating electrical machine 10 with respect to the engine 2.

Second embodiment

This embodiment is a modification of the above embodiment. In the above embodiment, one of the zero-cross points ZCg during the fall of the motor torque TQg is generated at the compression top dead center C-TDC. Alternatively, one of the motor valley points BTg may also be generated at compression top dead center C-TDC. In the present embodiment, the configuration of fig. 1, 2, and 3 is also adopted.

In fig. 8, in the present embodiment, the phase of the rotary electric machine 10 with respect to the engine 2 is adjusted so that the rotation of the engine 2 before and after the compression top dead center C-TDC is smoothed. In the present embodiment, the phase adjustment is performed such that one of the plurality of motor valley points BTg is generated at the compression top dead center C-TDC.

Fig. 9 is an enlarged waveform diagram shortly after the compression top dead center C-TDC. One of the motor valley points BTg, occurs at compression top dead center, C-TDC. And, the first zero crossing point ZCg, shortly after compression top dead center C-TDC, occurs before engine peak point Pke. As a result, the absolute value of the motor torque TQg is small immediately after the compression top dead center C-TDC, in which the absolute value of the engine torque TQe is small. Therefore, the motor torque TQg does not interfere with the rotation of the engine 2. Further, during the gradual increase of the absolute value of the engine torque TQe immediately after the compression top dead center C — TDC, the absolute value of the motor torque TQg remains small. Therefore, the motor torque TQg still does not interfere with the rotation of the engine 2.

In the present embodiment, the motor torque TQg fluctuates via a plurality of motor valley points BTg, which are minimum values. Motor torque TQg is adjusted to produce a motor valley point BTg at compression top dead center C-TDC. As a result, motor torque TQg is suppressed after compression top dead center C-TDC, and behavior of motor torque TQg that hinders rotation of internal combustion engine 2 is suppressed.

Third embodiment

This embodiment is a modification of the above embodiment. In the above embodiment, the zero cross point ZCg, or the motor valley point BTg during the fall of the motor torque TQg is generated at the compression top dead center C-TDC. Alternatively, zero crossing point ZCg during the rise of motor torque TQg may be generated shortly after compression top dead center C-TDC. In the present embodiment, the configuration of fig. 1, 2, and 3 is also adopted.

In fig. 10, in the present embodiment, the phase of the rotary electric machine 10 with respect to the engine 2 is adjusted so that the rotation of the engine 2 before and after the compression top dead center C-TDC is smoothed.

In the present embodiment, the phase adjustment is performed so that the zero cross point ZCg in the process of the rise of the motor torque TQg is generated immediately after the compression top dead center C-TDC. The zero crossing point ZCg is advanced only by 7/8T compared to the first embodiment. Therefore, the motor torque TQg shows a value less than the average value shortly after the compression top dead center C-TDC. In the present embodiment, the absolute value of the motor torque TQg is small immediately after the compression top dead center C-TDC, where the absolute value of the engine torque TQe is small. Therefore, the motor torque TQg does not interfere with the rotation of the engine 2. The motor torque TQg is small before the compression top dead center C-TDC. Therefore, the motor torque TQg does not interfere with the rotation of the engine 2 from before the compression top dead center C-TDC until shortly after the compression top dead center C-TDC.

In the present embodiment, the motor torque TQg fluctuates via a plurality of zero-crossing points ZCg that intersect the average. Motor torque TQg is adjusted to produce one of zero crossings ZCg in the process of motor torque TQg rising after compression top dead center C-TDC. In other words, the compression top dead center C-TDC is positioned in 1/2 cycles between the zero cross point ZCg during the fall of the motor torque TQg and the zero cross point ZCg during the rise of the motor torque TQg that continues to be generated at the zero cross point ZCg. As a result, motor torque TQg is suppressed after compression top dead center C-TDC, and behavior of motor torque TQg that hinders rotation of internal combustion engine 2 is suppressed.

Fourth embodiment

This embodiment is a modification of the above embodiment. In the above embodiment, the number of magnetic poles of the rotor 21 and the number of magnetic poles of the stator 31 are 12 to 12. Instead, the number of magnetic poles of the rotor 21 and the number of magnetic poles of the stator 31 may be various. For example, a plurality of numbers of poles such as 6 poles, 8 poles, 10 poles, 12 poles, 14 poles, 16 poles, and 18 poles, and combinations thereof may be used.

Fig. 11 shows a fourth embodiment. A rotating electric machine 410 has a rotor 21 and a stator 31. The rotor 21 has 6 magnetic poles. The stator 31 has 6 magnetic poles. According to the rotary electric machine 410, a waveform of the motor torque TQg having a longer period T than that of the above embodiment is provided.

Fig. 12 and 13, corresponding to fig. 4 and 5. In fig. 12 and 13, the phase of the rotary electric machine 410 is adjusted so that one of the zero-cross points ZCg, which is during the fall of the motor torque TQg, is generated at the compression top dead center C-TDC. In the present embodiment, after compression top dead center C-TDC, the motor torque TQg is smaller for a longer period of time than in the previous embodiment. In this embodiment, the leading motor valley point BTg is generated before the engine peak point Pke. Also, after engine peak point Pke, a second zero crossing point ZCg is generated. Therefore, the motor torque TQg is suppressed to be equal to or less than the average value during the period until the engine torque TQe reaches the engine peak point Pke. Therefore, the motor torque TQg assists smooth rotation of the engine 2. Further, after engine peak point Pke, a leading motor peak point PKg is generated. Therefore, the motor torque TQg can assist the smooth rotation of the engine 2 for a longer period of time.

In the above-described embodiments, the stator core disclosed in the embodiments described below can be used. In several of the embodiments described later, some embodiments may produce fluctuations in motor torque that are suitable for combination with the embodiments described above. Even if the torque phase accompanying the engine rotation and the phase of the motor torque are synchronized in a predetermined relationship, the effect of the above embodiment is small if the pulsation width of the motor torque is small. In contrast, as shown in the embodiments described later, by combining the stator core that generates a large motor torque ripple width with the above embodiments, it is expected to achieve a desired effect.

Fifth embodiment

Fig. 14 shows an electrical power system 510 for an internal combustion engine. The power system 510 includes a rotating electric machine 511 for an internal combustion engine (hereinafter simply referred to as a rotating electric machine). In the figure, a cross section of the rotating electrical machine 511 is shown, of the cross section containing the rotating shaft AX. The rotating electrical machine 511 is assembled in the internal combustion engine 512. The internal combustion engine 512 includes: a fuselage 513; and a rotating shaft 514 rotatably supported by the body 513 and rotating in conjunction with the internal combustion engine 512. Rotating electric machine 511 is assembled to body 513 and rotating shaft 514. The body 513 is a structure such as a crankcase or a transmission case of the internal combustion engine 512. In the illustrated example, the fuselage 513 has a right-hand base and a left-hand mantle. The rotating shaft 514 is a crankshaft of the internal combustion engine 512 or a rotating shaft linked with the crankshaft. The rotary shaft 514 rotates with the operation of the internal combustion engine 512, and drives the rotary electric machine 511 to function as a generator. And when the rotating motor 511 functions as a motor, the rotating shaft 514 is driven to rotate by the rotating motor 511.

The power system 510 has a Circuit (CNT) 515. Rotating electric machine 511 and electric circuit 515 are connected by power line 516. When the rotating electrical machine 511 functions as a generator, the power line 516 outputs the generated electric power to the circuit 515. The circuit 515 has a rectifying circuit for rectifying the generated power. The circuit 515 contains the vehicle's circuitry and battery. One example of an application of the rotating electrical machine 511 is a generator driven by an internal combustion engine 512 for a vehicle. The rotating electrical machine 511 may be used in a saddle-ride type vehicle, for example.

The rotating electrical machine 511 may be used as an electric motor for assisting the vehicle internal combustion engine 512. In this case, the circuit 515 includes an inverter circuit and a control device. In this case, the rotary electric machine 511 includes one or more rotary position sensors to output signals indicating the rotary position. The rotational position sensor outputs a reference position signal of the rotating electrical machine 511 and/or a rotational position signal of the rotating electrical machine 511 to the circuit 515. The control device performs control using the rotation position signal so that the rotating electrical machine 511 functions as a motor.

The rotary electric machine 511 includes a rotor 521 and a stator 531. The rotor 521 is an excitation element. The stator 531 is an armature. The rotor 521 has an overall cup shape. The rotor 521 is a member extending across the end surface and the radially outer side surface of the stator 531. The rotor 521 is fixed to an end of the rotating shaft 514. The rotor 521 is connected to the rotary shaft 514 via a positioning mechanism in a rotational direction such as a key engagement. The rotor 521 is fixed by being fastened to the rotary shaft 514 by a fixing bolt. The rotor 521 rotates together with the rotating shaft 514. The rotor 521 is rotatably supported to be opposed to the plurality of magnetic poles.

The rotor 521 has a cup-shaped rotor core 522. The rotor core 522 is connected to a rotary shaft 514 of the internal combustion engine 512. The rotor core 522 provides a yoke for the permanent magnet 523 described later. The rotor core 522 is made of a magnetic metal.

The rotor 521 has a permanent magnet 523 provided on the inner surface of the rotor core 522. The rotor 521 is provided with a magnetic field by a permanent magnet 523. The permanent magnet 523 is fixed to the inside of the cylinder of the rotor core 522. The permanent magnet 523 has a plurality of segments. Each segment is partially cylindrical. The permanent magnet 523 has a plurality of N poles and a plurality of S poles provided inside thereof. The permanent magnet 523 provides at least a magnetic field. The permanent magnet 523 provides 6 pairs of N-pole and S-pole, 12-pole magnetic fields by 12 segments. The number of poles may be other numbers.

The stator 531 has a stator core 532. The stator core 532 is disposed radially inward of the rotor 521 by being fixed to the body 513 of the internal combustion engine 512. The stator core 532 is formed by laminating electromagnetic steel sheets formed into a predetermined shape. The stator 531 has a stator coil 533 wound around a stator core 532. The stator coil 533 provides an armature winding. The stator coil 533 is a single-phase winding or a multi-phase winding. The stator coil 533 provides an armature winding.

The stator 531 has an insulator 534. The insulator 534 is disposed between the stator core 532 and the stator coil 533. The insulator 534 is also referred to as a bobbin. A portion of the insulator 534 is positioned adjacent to the pole, providing a flange portion of the bobbin. A part of the insulator 534 is disposed on both sides in the axial direction of the magnetic pole. The insulator 534 is also exposed at the annular portion of the stator core 532.

The stator 531 has a bracket 535. The bracket 535 is fixed to the stator core 532. Bracket 535 secures power cord 516.

The stator 531 is an annular member. The stator 531 is fixed to the body 513 by a plurality of fixing bolts. The stator 531 is disposed between the rotor 521 and the body 513. The stator 531 has an outer peripheral surface facing the inner surface of the rotor 521 with a gap therebetween.

The rotation of the rotating electric machine 511 is detected by a rotation sensor 517. The rotation sensor 517 detects a feature formed on the outer face of the rotor 521. The features provide, for example, a plurality of projections and recesses therebetween. The waveform detected by the rotation sensor 517 is also referred to as a pulser waveform. The rotation sensor 517 may be provided by a magnetic sensor such as a magnetic pickup, MRE element, hall effect element, or the like.

The stator coil 533 is provided by an aluminum-based metal. The stator coil 533 is provided by an aluminum conductor or an aluminum alloy conductor.

Fig. 15 shows the rotor 521 and the stator 531. The figure shows the cover removed. The figure shows a central opening 531a of the stator 531. In the central opening 531a, a boss 522a of the rotor 521 is visible. Shown in the figure is the open end of the rotor 521. And schematically shows the shape of the stator coil 533.

The stator core 532 has a plurality of poles 536. The stator core 532 has a connection portion 537. The connecting portion 537 has a ring shape. The connecting portions 537 connect the plurality of magnetic poles 536 at their bases. The connection portion 537 is used as a yoke of the plurality of magnetic poles 536. The stator core 532 is fixed to the airframe 513 at a connection portion 537. The connection portion 537 may have a seam. The plurality of magnetic poles 536 are arranged on the outer periphery. The poles 536 are also referred to as teeth. The stator core 532 has, for example, 12 poles 536. The number of poles 536 may be other numbers. These magnetic poles 536 are arranged to oppose the magnetic field of the rotor 521. One pole 536 has one single coil 533 u. The stator coil 533 has a plurality of single coils 533 u. The single coil 533u is also referred to as a unit coil (unit coil).

Fig. 16 shows the stator core 532. The rotary shaft AX of the rotary electric machine 511 and the radial center axis AR of the magnetic pole 536 are shown. The stator core 532 has a plurality of poles 536 and a common connection portion 537. One pole has a distal end 536a for opposing the rotor 521. The distal end 536a provides a circumferentially expanding outer circumferential surface. Distal end 536a is also referred to as a distal enlargement. The distal end 536a provides a radially outwardly facing pole face. One magnetic pole 536 has a rod-like portion 536c that is closer to the radially inner side than the distal end portion 536 a. The rod-shaped portion 536c connects the distal end portion 536a and the connection portion 537. The rod 536c extends radially. The rod-like portion 536c extends radially inside the stator coil 533. The connecting portion 537 is provided on the proximal end side of the plurality of rod-shaped portions 536c, i.e., radially inside.

Fig. 17 is a perspective view of the insulator 534. The insulator 534 is arranged to sandwich the stator core 532 from both sides. One half of insulator 534 is shown. The insulator 534 has a flange portion 534a, the flange portion 534a being positioned to protrude from a distal end portion 536 a. The flange portion 534a provides a flange for the stator coil 533. The insulator 534 has a receiving portion 534 b. The receiving portion 534b receives the distal end portion 536a and exposes the distal end surface 536 b.

The insulator 534 has a body portion 534 c. The flange 534a extends radially outward from the shaft of the body 534c with respect to the shaft of the body 534 c. The barrel 534c is cylindrical. The body 534c is a square tube with rounded corners. The trunk 534c extends radially. The trunk portion 534c receives the rod-like portion 536 c. The body 534c encloses the rod 536 c. The body 534c has an outer surface shape corresponding to the outer surface of the rod 536 c. The trunk portion 534c provides a winding drum for the stator coil 533.

The insulator 534 has a ring-shaped connecting portion 534 d. The connecting portion 534d connects the plurality of body portions 534 c. The connecting portion 534d is disposed radially inward of the plurality of barrel portions 534 c. The connecting portion 534d extends from the shaft of the body portion 534c radially outward with respect to the shaft of the body portion 534 c.

The flange 534a and the connecting portion 534d are located at both ends of the body 534 c. The flange portion 534a, the barrel portion 534c, and the connecting portion 534d provide a winding drum for the stator coil 533. The flange 534a, the body 534c, and the connecting portion 534d are also referred to as bobbins. The flange portion 534a and the connection portion 534d are also members that define the range of the stator coil 533.

Fig. 18 is a plan view showing one tooth. The illustrated numerical values represent the tooth sizes. The unit is millimeters (mm). The teeth are straight in the radial direction. In addition, the thickness of the teeth was 9 (mm). In this example, the stator coil 533 is provided by a copper-based metal. The number of turns of the stator coil 533 in one tooth is 36.

Fig. 19 is a waveform diagram showing the performance at the time of transition of the rotary electric machine 511 including a stator having the teeth in fig. 18. Shown is a waveform at the transition of gradually increasing rotational speed. The waveform diagram shows the case where the rotational speed is varied in the range of about 3000r/min to 6000r/min during the period from time t1 to time t 2. The internal combustion engine 512 is a four-stroke single cylinder. One rotation of the rotor 521 corresponds to one rotation of the crankshaft. The number of revolutions of the internal combustion engine 512 generates torque fluctuations caused by its intake and/or exhaust valves, and torque fluctuations caused by multiple strokes of intake, compression, combustion, and exhaust.

The pulser waveform PW of the rotation sensor 517 has a plurality of pulses. The interval between the plurality of pulses represents the number of revolutions.

Torque waveform TW output from torque sensor 519 shows torque generated in stator 531. The torque waveform TW may be measured by a fixed portion on the test stand. The torque sensor 519 may be provided by various sensors for detecting torque generated in the stator 531. The torque sensor 519 may be provided by a strain gauge that detects deformation of the fixed portion in the rotational direction. The torque waveform TW fluctuates sharply. The torque waveform TW periodically fluctuates.

The torque waveform TW oscillates between the first reference value TrH and the second reference value TrL that is lower than the first reference value TrH. The distance between the first reference value TrH and the second reference value TrL is referred to as a reference fluctuation width.

Fig. 20 is an enlarged waveform view of a portion of fig. 19. The figure shows a waveform around 5000 r/min. The correspondence between each pulse in the pulser waveform PW and the fluctuation of the torque waveform TW can be read.

Fig. 21 is an enlarged waveform diagram of a portion of fig. 19. The figure shows a torque waveform TW.

Fig. 22 is a plan view showing one tooth. The outer end of the bar-shaped portion of the tooth in the radial direction is thicker than the inner end in the radial direction. The teeth are referred to as tapered. The teeth allow a relatively large number of turns. The teeth have a flat portion and an enlarged portion. The straight portion is located at the proximal end portion, and the enlarged portion is located at the distal end portion. In addition, the thickness of the teeth was 11 (mm). In this example, the stator coil 533 is provided by an aluminum-based metal. The number of turns of the stator coil 533 in one tooth is 30.

Fig. 23 shows the performance at the time of transition of the rotary electric machine 511 including the stator core having the teeth in fig. 22. Fig. 23 corresponds to fig. 19. The torque waveform TW fluctuates within the reference fluctuation range. However, the torque waveform TW takes a longer time to approach the first reference value TrH than in fig. 19. The effective value, or the average value, or the center value of the torque waveform TW in fig. 23 is higher than the corresponding value of the torque waveform in fig. 19. Fig. 24 and 25 correspond to fig. 20 and 21. The stator core having the teeth in fig. 22 is circumferentially thinner and circumferentially softer than the stator core having the teeth in fig. 18.

Fig. 26 is a plan view showing one tooth. The teeth in fig. 26 have a thinner base end than the teeth in fig. 22. The teeth in fig. 26 are thinner than the teeth in fig. 22. Wherein the thickness of the teeth is 9 (mm). In this example, the stator coil 533 is provided by an aluminum-based metal. The number of turns of the stator coil 533 in one tooth is 36.

Fig. 27 shows the performance at the time of transition of the rotary electric machine 511 including the stator core having the teeth in fig. 26. Fig. 27 corresponds to fig. 19. The torque waveform TW fluctuates within the reference fluctuation range. However, the torque waveform TW takes a longer time to approach the first reference value TrH than in fig. 19 and 22. The effective value, or the average value, or the center value of the torque waveform TW in fig. 27 is higher than the corresponding value of the torque waveform in fig. 23. Fig. 28 and 29 correspond to fig. 20 and 21. The stator core having the teeth in fig. 26 is circumferentially thinner and circumferentially softer than the stator core including the teeth in fig. 18. The stator core having the teeth in fig. 26 is circumferentially thinner and circumferentially softer than the stator core having the teeth in fig. 22.

Fig. 30 is a plan view showing one tooth. The teeth in fig. 30 are the same as the teeth in fig. 26. In this example, the stator coil 533 is provided by an aluminum-based metal. The number of turns of the stator coil 533 in one tooth is 36. However, the amount of magnetization of the permanent magnet 523 is stronger than that of the rotating electric machine having the teeth in fig. 18, 22, and 26.

Fig. 31 shows the performance at the time of transition of the rotary electric machine 511 including the stator core having the teeth in fig. 30. Fig. 31 corresponds to fig. 19. The torque waveform TW fluctuates within the reference fluctuation range. However, the torque waveform TW takes a longer time to approach the first reference value TrH than in fig. 19, 23, and 27. The effective value, or the average value, or the center value of the torque waveform TW in fig. 31 is higher than the corresponding value of the torque waveform in fig. 27.

The teeth and stator coil 533 in fig. 30 are the same as those in fig. 26. Therefore, it is considered that the difference in the torque waveform TW is caused by the difference in the magnetization amount of the permanent magnet 523. The strong permanent magnet 523 in this example appears to exert an on average large torque on the stator 531. Also, the strong permanent magnet 523 appears to reduce the amplitude of the torque waveform TW. Fig. 32 and 33 correspond to fig. 20 and 21.

Fig. 34 is a plan view showing one tooth. The teeth are straight in the radial direction. The thickness of the teeth was 12 (mm). In this example, the stator coil 533 is provided by a copper-based metal. The number of turns of the stator coil 533 in one tooth is 32 turns. The magnetization amount of the permanent magnet 523 is the same as that of the rotating electric machine having the teeth in fig. 18, 22, and 26.

Fig. 35 shows the performance at the time of transition of the rotary electric machine 511 including the stator core having the teeth in fig. 34. Fig. 35 corresponds to fig. 19. The torque waveform TW fluctuates within the reference fluctuation range. Fig. 36 and 37 correspond to fig. 20 and 21.

Fig. 38 is a plan view showing one tooth. The outer end of the bar-shaped portion of the tooth in the radial direction is thicker than the inner end in the radial direction. The teeth are referred to as tapered. The teeth allow a relatively large number of turns. The teeth have a flat portion and an enlarged portion. The straight portion is located at the proximal end portion, and the enlarged portion is located at the distal end portion. In addition, the thickness of the teeth was 12 (mm). In this example, the stator coil 533 is provided by an aluminum-based metal. The number of turns of the stator coil 533 of one tooth is 29 turns. The magnetization amount of the permanent magnet 523 is the same as that of the rotating electric machine having the teeth in fig. 18, 22, and 26.

The teeth in fig. 38 are slightly longer than those in fig. 34 and are thinner at the base end portions. The tooth in fig. 38, shows a greater reluctance than the tooth in fig. 34. Using the teeth of stator coil 533 in fig. 38, a smaller inductance is shown than using the teeth of stator coil 533 in fig. 34.

The tooth in fig. 38 exhibits a larger circumferential deflection than the tooth in fig. 34. It can also be said that the teeth in fig. 38 have a softer construction than the teeth in fig. 34. The deflection of the teeth in fig. 38 is about 40% greater than the deflection of the teeth in fig. 34.

Fig. 39 shows the performance at the time of transition of the rotary electric machine 511 including the stator core having the teeth in fig. 38. Fig. 39 corresponds to fig. 19. The torque waveform TW fluctuates within the reference fluctuation range. The torque waveform TW is closer to the second reference value TrL for a longer time than in fig. 35. The amplitude of the torque waveform TW is smaller than that of fig. 35. The effective value, or the average value, or the central value of the torque waveform TW in fig. 39 is lower than the corresponding value of the torque waveform in fig. 35. Fig. 40 and 41 correspond to fig. 20 and 21. The stator core having the teeth in fig. 38 is circumferentially thinner and circumferentially softer than the stator core including the teeth in fig. 34.

Fig. 42 is a plan view showing one tooth. The bar-shaped part of the teeth in fig. 42 is thicker than the teeth in fig. 38. The thickness of the teeth was 12 (mm). In this example, the stator coil 533 is provided by an aluminum-based metal. The number of turns of the stator coil 533 of one tooth is 29 turns. The magnetization amount of the permanent magnet 523 is the same as that of the rotating electric machine having the teeth in fig. 18, 22, and 26.

The teeth in fig. 35 are thicker at the base end than the teeth in fig. 38. The teeth in fig. 42, show less reluctance than the teeth in fig. 34 and 38. Using the teeth of stator coil 533 in fig. 42, a smaller inductance is shown than using the teeth of stator coil 533 in fig. 34.

The teeth in fig. 42 exhibit a smaller amount of circumferential deflection than the teeth in fig. 34 and 38. It can also be said that the teeth in fig. 42 have a harder structure than the teeth in fig. 38. The deflection of the teeth in fig. 42 is about 10% smaller than the deflection of the teeth in fig. 34.

Fig. 43 shows the performance at the time of transition of the rotary electric machine 511 including the stator core having the teeth in fig. 42. Fig. 43 corresponds to fig. 19. The torque waveform TW fluctuates within the reference fluctuation range. However, the torque waveform TW takes a longer time to approach the first reference value TrH than in fig. 35. The effective value, or the average value, or the center value of the torque waveform TW in fig. 43 is higher than the corresponding value of the torque waveform in fig. 35. Fig. 44 and 45 correspond to fig. 20 and 21.

According to the present disclosure, the torque generated in the stator of the rotating electric machine 511 using the copper-based metal and the torque generated in the stator of the rotating electric machine 511 using the aluminum-based metal can be adjusted to the same degree. This suppresses the difference in torque of the rotating electric machine 511 that becomes a load for the internal combustion engine 512. The torque generated in the stator may be evaluated as (1) an effective value, an average value, or a central value of the torque that fluctuates, (2) a torque amplitude of the fluctuation, or (3) a synchronization relationship (phase relationship) with the fluctuation of the torque generated in the rotating shaft of the internal combustion engine 512. The torque generated in the stator is affected by the kind of winding and the rigidity of the teeth of the stator core 532. According to the present disclosure, a torque difference caused by a difference between the copper-based metal winding and the aluminum-based metal winding can be suppressed.

Fig. 46 is a plan view of a stator core having circular fitting portions (forged marks) 541 at all tooth roots. The annular portion from which the plurality of teeth protrude has a plurality of fitting portions 541 for maintaining the plurality of steel plates in a stacked state. The plurality of circular fitting portions contribute to adjustment of the rigidity of the plurality of teeth. In this example, the fitting portion increases the rigidity of the plurality of teeth by work hardening.

Fig. 47 is a plan view of a stator core having square fitting portions 542 (forged marks) at all tooth root portions. The plurality of square fitting portions 542 contribute to adjustment of the rigidity of the plurality of teeth.

Fig. 48 is a plan view of a stator core having linear trapezoidal connecting portions 543 at all tooth root portions. A trapezoidal connecting portion 543 is provided between the outer surface of the annular portion and the base end portions of the plurality of teeth, and the width of the trapezoidal connecting portion 543 changes with the teeth toward the radial outer side. The trapezoidal connecting portion 543 contributes to adjusting the rigidity of the plurality of teeth.

The example of fig. 49 is a cross-sectional view of a stator with an aluminum-based coil winding wound to form more layers at the root of the teeth than at the distal ends of the teeth. The stator coil 533 has a plurality of single coils 544 corresponding to each of the plurality of teeth. One single coil 544 is 3 layers at the radially outer end and 4 layers at the radially inner end. The stator coil 533 has a larger number of layers closer to the radially inner side. The stator coil 533 is lighter toward the radially outer side, and thus the torque that deforms the teeth can be suppressed. In addition, the stator coil 533 itself also reinforces the teeth.

Fig. 50 is a plan view of a stator core in which the outer periphery of a plurality of teeth is formed in a continuous ring shape. The stator core 532 has continuous annular magnetic pole portions 545 at distal ends of the plurality of teeth. The continuous annular magnetic pole portions 545 contribute to improving the rigidity of the plurality of teeth.

Fig. 51 is a cross-sectional view of a stator in which a resin spacer 546 is disposed between adjacent teeth. The stator has a resin spacer 546 connecting a plurality of teeth. The spacer 546 may be provided by a plurality of resin sheets or an annular resin ring.

Fig. 52 is a cross-sectional view of a stator in which resin is filled between a plurality of teeth and a plurality of coils. The stator has a resin molded body 547. The resin molded body 547 is embedded between the plurality of teeth and the plurality of coils. After the stator coil 533 is wound, the resin mold 547 may be molded to be embedded in the stator.

The example of fig. 53 is a plan view of a stator core having radially extending slots 548 radially outward of the teeth. The slots 548 extend radially in the tooth from the radially outer end face of the tooth. The slits 548 are open at both axial end faces of the stator core. By providing the slit 548, the magnetic path generated in the circumferential direction is divided. Even if the contact is made during winding, there is no problem because the magnetic resistance increases, but it is desirable to fill the slit 548 with a non-contact material or to wind a wire around a hard bobbin.

Fig. 54 is a plan view of stator core 549 according to another embodiment. The amount of radially outer iron in the teeth is suppressed. The tooth may be tapered radially outward, or the flange portion may be reduced in width or thinned. Since the winding performance is deteriorated, the outer surface of the bobbin is formed into a straight cylindrical outer surface. The outer side surface of the bobbin is designed to be linear.

Other embodiments

The contents of the invention in the present specification and the drawings of the specification are not limited to the embodiments described above. The summary includes the embodiments listed and variations thereof based on them by those skilled in the art. For example, the inventive content is not limited to the combinations of components and/or elements disclosed in the embodiments. The inventive content can be implemented in various combinations. The inventive content may also have additional parts that can be added to the embodiments. The summary of the invention includes embodiments in which components and/or elements are omitted. The summary includes permutations and combinations of parts and/or elements between one embodiment and other embodiments. The technical scope of the disclosure is not limited to the description of the embodiments. The technical scope of the present disclosure is defined by the description of the claims, and all changes that come within the meaning and range of equivalency of the claims are to be embraced therein.

In the above embodiment, the engine 2 is exemplified by a four-stroke reciprocating engine. Alternatively, the engine 2 may be provided by various internal combustion engines such as a two-stroke engine, a rotary engine, or the like. In the above embodiment, the engine 2 is a single cylinder. Alternatively, the engine 2 may be multi-cylinder. Although the multi-cylinder engine 2 generates a complex engine torque TQe waveform, the fluctuation factor of the engine 2 can be adapted to the application by adjusting the phase of the rotating electric machine 10. In this case, too, a rotating electric machine for an internal combustion engine is provided in which the fluctuation element of the engine 2 is intentionally suppressed or emphasized.

In the above embodiments, a single-phase generator is exemplified. Alternatively, the rotating electrical machine 10 may also be a multiphase generator. Further, the rotary electric machine 10 may sometimes provide a generator motor. In this case, the rotating electrical machine 10 is provided with a rotational position detector for use as a generator motor. The circuit 11 may include an inverter circuit and a control device. When the rotating electrical machine 10 functions as a generator, the circuit 11 provides a rectifier circuit that rectifies the output ac power and supplies power to an electrical load including a battery. The circuit 11 provides a signal processing circuit that receives the reference position signal provided by the rotary electric machine 10. The reference position signal is used for ignition timing control and/or fuel injection timing control. Circuit 11 may also provide a controller that performs engine control including ignition timing control and/or fuel injection timing control. The circuit 11 provides a drive circuit for operating the rotating electrical machine 10 as a motor. The circuit 11 receives a rotational position signal from the rotating electrical machine 10, which is used to operate the rotating electrical machine 10 as a motor. The electric circuit 11 controls the energization of the rotating electrical machine 10 based on the detected rotational position, thereby operating the rotating electrical machine 10 as a motor.

As shown in the above embodiments, the present disclosure can be applied to a rotating electrical machine having a stator coil 33 of a single phase or a plurality of phases. For example, the present disclosure can also be applied to a variety of connection shapes such as star connection, delta connection, and the like. Further, the present disclosure is applicable to a rotating electrical machine including a plurality of coils different in electrical angle in one phase. For example, two coil elements may be connected in parallel in the same phase. Similarly, three coil elements may also be connected in parallel.

In the above embodiment, the stator coil 33 provides a single-phase winding. The single phase winding will produce a motor torque TQg with a large difference between the motor peak point PKg and the motor valley point BTg. Therefore, when the engine torque TQe imparted by the motor torque TQg changes, the amount of change thereof is large. Therefore, the single-phase winding exhibits a relatively significant effect. Alternatively, the stator coil 33 may provide a multi-phase winding. In the case of a multi-phase winding, the difference between motor peak point PKg and motor valley point BTg in motor torque TQg is relatively small.

In the above embodiment, the circuit 11 includes an open-type regulator. The open-circuit type regulator is likely to exhibit a sine wave in the power generation output of the stator coil 33. Therefore, the motor torque TQg having a large difference between the motor peak point PKg and the motor valley point BTg is easily generated. As a result, the combination of the single phase winding and the open-circuit type regulator contributes to providing the motor torque TQg that is easily utilized. In addition, the circuit 11 may also include a short-circuit type regulator. The circuit 11 may comprise a rectifying circuit provided by a plurality of rectifying elements, such as diodes, or a bridge circuit comprising thyristors.

In the above embodiment, the coil wire forming the stator coil 33 is an aluminum-based metal. Alternatively, the coil wire may be formed of a variety of conductive materials. For example, the coil wire may also be made of copper or a copper alloy. In addition, a part of the coil wires forming the stator coil 33 may be made of an aluminum-based metal, and the other part may be made of a copper-based metal.

In the above embodiment, the phase of the motor torque TQg with respect to the engine torque TQe is adjusted by adjusting the phase of the rotary

electric machines

10 and 410. Alternatively, the phase of the motor torque TQg may be adjusted by controlling the output of the rotary

electric machines

10, 410. For example, when the output of the rotary electric machine 10 is controlled by the rectifier circuit 11a, the phase of the motor torque TQg may be shifted due to a change in the impedance component of the circuit 11. Therefore, the rectifier circuit 11a may be controlled so that the motor torque TQg becomes low after the compression top dead center C-TDC including the compression top dead center C-TDC. In this case, the motor torque TQg is also suppressed shortly after the compression top dead center C-TDC where the absolute value of the engine torque TQe is low. Therefore, a rotating electric machine for an internal combustion engine that assists smooth rotation of the engine 2 can be provided.

Description of the reference numerals

1 internal combustion engine system, 2 internal combustion engines and 3 cylinders

4 pistons, 5 rotating shafts, 6 connecting rods,

7 valve system, 8 driving system and 9 machine body

10 rotating electric machine, 11 circuit, 15 wire harness,

21 rotor, 22 rotor core, 23 permanent magnet

21a, 21b rotor positioning mechanism

31 stator, 32 stator core, 33 stator coil,

31a, 31b stator positioning mechanism, 410 rotating electric machine,

C-TDC compression top dead center, P-BDC combustion bottom dead center,

E-TDC exhaust top dead center, I-BDC intake bottom dead center,

TQe Engine Torque, PKe Engine Peak Point

TQg motor torque, PKg motor peak point,

ZCg zero crossing point, BTg motor valley point,

510 electric power system, 511 rotating electric machine, 512 internal combustion engine,

521 rotor, 522 rotor core, 523 permanent magnet

531 stator, 532 stator core

533 stator coil, 534 insulator

536 magnetic pole, 537 connecting part,

517 rotation sensor, 519 strain gauge.

Claims

1. A rotary electric machine for an internal combustion engine connected to a rotary shaft (5) of the internal combustion engine (2) has a rotor (21), and a stator (31) opposed to the rotor,

a motor torque (TQg) consumed for rotating the rotor is adjusted so that behavior that impedes rotation of the internal combustion engine is suppressed at a compression top dead center (C-TDC) of the internal combustion engine.

2. A rotary electric machine for an internal combustion engine according to claim 1, wherein the motor torque is adjusted so as to suppress a behavior that hinders rotation of the internal combustion engine immediately after a compression top dead center of the internal combustion engine;

the period immediately after the compression top dead center is a period until the engine torque (TQe) of the internal combustion engine reaches a maximum value, that is, an engine peak point (PKe).

3. The rotating electric machine for an internal combustion engine according to claim 1 or 2,

the motor torque has a plurality of increasing and decreasing cycles (T) repeatedly during an operating cycle (720CA) of the internal combustion engine,

shortly after compression top dead center of the internal combustion engine, there is a low torque period in which the motor torque is relatively low.

4. The rotating electric machine for an internal combustion engine according to any one of claims 1 to 3,

the motor torque fluctuates via a plurality of zero-crossing points (ZCg) that cross the average value,

and the motor torque is adjusted to one of the zero-crossing points in the process of generating the motor torque down at the compression top dead center.

5. The rotating electric machine for an internal combustion engine according to any one of claims 1 to 3,

the motor torque fluctuates via a plurality of motor valley points (BTg) as minimum values,

and the motor torque is adjusted to produce one of the motor valley points at the compression top dead center.

6. The rotating electric machine for an internal combustion engine according to any one of claims 1 to 3,

and the motor torque is adjusted to one of the zero-crossing points in the process of generating the motor torque rise after the compression top dead center.

7. The rotating electric machine for an internal combustion engine according to claim 6, wherein the compression top dead center is located within 1/2 cycles between the zero cross point during a fall of the motor torque and the zero cross point (ZCg) during a rise of the motor torque that continues to be generated at the zero cross point.

8. A rotating electric machine for an internal combustion engine according to any one of claims 1 to 7, wherein the motor torque is adjusted by a phase associated with the rotor and/or the stator, and/or a current flowing through the stator.

9. The rotating electric machine for an internal combustion engine according to claim 8, wherein the motor torque passes through a position of a magnetic pole of the rotor,

Positioning the rotor at a position of a rotor positioning portion (21b) of the internal combustion engine, or

The stator is positioned at a position of a stator positioning portion (31b) of the internal combustion engine.

10. A method of manufacturing a rotary electric machine for an internal combustion engine having a rotor (21) rotated by a rotary shaft (5) of an internal combustion engine (2), and a stator (31) opposed to the rotor,

the method for manufacturing a rotating electric machine for an internal combustion engine includes:

a planning step of planning a motor torque (TQg) to be consumed for rotating the rotor so as to suppress a behavior that impedes rotation of the internal combustion engine at a compression top dead center (C-TDC) of the internal combustion engine; and

a forming stage of forming the rotating electric machine for the internal combustion engine to generate the motor torque planned in the planning stage.

11. The manufacturing method of a rotating electrical machine for an internal combustion engine according to claim 10, wherein the forming stage is a stage of forming a magnetic pole of the rotor.

12. A method of operating a rotating electrical machine for an internal combustion engine, which operates a rotating electrical machine (10) rotated by a rotating shaft (5) of an internal combustion engine (2),

the method for operating a rotating electric machine for an internal combustion engine includes:

operating the internal combustion engine;

rotating the rotating electrical machine by the internal combustion engine;

adjusting motor torque (TQg) consumed for rotation of the rotating electric machine to suppress behavior that hinders rotation of the internal combustion engine at a compression top dead center (C-TDC) of the internal combustion engine; and

generating the regulated motor torque.

13. A rotating electrical machine for an internal combustion engine, comprising:

a rotor connected to the internal combustion engine and providing a rotating magnetic field;

a stator coil provided by an aluminum-based metal;

a stator core, which is mounted with the stator coil, receives the rotating magnetic field, and is formed to adjust a torque generated when used as a rotating electric machine.

14. A stator core of a rotary electric machine for an internal combustion engine is mounted with a stator coil provided by an aluminum-based metal, and is formed to adjust a torque generated when used as the rotary electric machine.