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WO2018037455A1 - Rotor à pôles conséquents, moteur électrique et climatiseur - Google Patents

Rotor à pôles conséquents, moteur électrique et climatiseur Download PDF

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Publication number
WO2018037455A1
WO2018037455A1 PCT/JP2016/074385 JP2016074385W WO2018037455A1 WO 2018037455 A1 WO2018037455 A1 WO 2018037455A1 JP 2016074385 W JP2016074385 W JP 2016074385W WO 2018037455 A1 WO2018037455 A1 WO 2018037455A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
magnets
axial direction
magnetic pole
magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/074385
Other languages
English (en)
Japanese (ja)
Inventor
優人 浦邊
及川　智明
山本　峰雄
石井　博幸
洋樹 麻生
隼一郎 尾屋
諒伍 ▲高▼橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2016/074385 priority Critical patent/WO2018037455A1/fr
Priority to JP2018535463A priority patent/JP6545393B2/ja
Priority to PCT/JP2017/020020 priority patent/WO2018037652A1/fr
Priority to CN201790000484.7U priority patent/CN208835850U/zh
Publication of WO2018037455A1 publication Critical patent/WO2018037455A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2746—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets arranged with the same polarity, e.g. consequent pole type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets

Definitions

  • the present invention relates to a continuous pole type rotor, an electric motor, and an air conditioner.
  • a rare earth magnet having a high energy density such as a neodymium sintered magnet is generally used as a permanent magnet of an electric motor mounted on a compressor of an air conditioner.
  • An electric motor using a neodymium sintered magnet has been developed for an air conditioner fan.
  • Such a permanent magnet is expensive because it contains a valuable rare earth element. Therefore, there is a strong demand for reducing the cost by reducing the amount of permanent magnet used and the processing cost.
  • Permanent magnets are generally processed into a specified shape by cutting block-like chunks. For this reason, the processing cost increases as the number of permanent magnets used in the electric motor increases.
  • a rotor As a method for reducing the number of permanent magnets used in an electric motor, there is a method in which a rotor is constituted by a so-called continuous pole.
  • the continuous pole type rotor magnet magnetic poles formed by permanent magnets and salient poles formed on the core material without using permanent magnets are alternately arranged in the circumferential direction. Therefore, the number of magnet magnetic poles and the number of salient poles are both half the number of poles. Also, half the number of magnetic poles has the same polarity, and half the number of salient poles has a different polarity from the magnetic pole.
  • the number of permanent magnets is half of the normal number.
  • the continuous pole type rotor there is a problem that the inductance differs between the magnetic pole and the salient pole, and vibration and noise increase due to the imbalance of the inductance.
  • the continuous pole type rotor disclosed in Patent Document 1 improves the asymmetry of inductance by devising the shape of the flux barrier at both ends of the permanent magnet, and reduces vibration and noise noise. I am trying.
  • An electric motor using a continuous pole type rotor disclosed in Patent Document 1 includes a magnetic sensor that detects a position of the rotor in the rotation direction, and the magnetic sensor leaks in the axial direction from the magnet magnetic pole of the rotor.
  • the rotation control of the rotor is performed by alternately detecting the first magnetic field and the second magnetic field leaking in the axial direction from the salient poles of the rotor.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain a continuous pole type rotor capable of improving the detection accuracy of the rotational position.
  • a consequent pole type rotor includes a rotor core and a plurality of permanent magnets disposed inside the rotor core.
  • a rotor of a type each including a plurality of permanent magnets, each of which is formed between a plurality of first magnetic pole portions having a first polarity by the permanent magnets and each of the permanent magnets adjacent to each other;
  • a plurality of second magnetic pole portions having a second polarity different from the one polarity and a plurality of second magnetic pole portions installed at one end of the rotor core in the axial direction of the rotor core and detecting positions in the rotation direction of the rotor core
  • a plurality of position detection magnets wherein the magnetic poles on one end face in the axial direction are the same as the magnetic poles on one end face of the second polarity in the axial direction, and Magnetic pole on the other end face Is the same as the second polarity other end face of the magnetic poles of the
  • the continuous pole type rotor according to the present invention has an effect of improving the detection accuracy of the rotational position.
  • Sectional drawing of the electric motor provided with the consequent pole type rotor which concerns on Embodiment 1 of this invention Sectional view of the mold stator shown in FIG. Sectional drawing which shows the state by which the rotor was inserted in the mold stator shown in FIG.
  • Sectional view of the rotor shown in FIG. 1 is a perspective view of a continuum pole type rotor according to a first embodiment of the present invention.
  • FIG. 1 The figure which shows the 1st modification of the continuum pole type rotor which concerns on Embodiment 1 of this invention.
  • Front view of the rotor shown in FIG. The perspective view of the annular magnet group shown in FIG.
  • Front view of the rotor shown in FIG. First perspective view of the annular magnet group shown in FIG.
  • FIG. 1 is a cross-sectional view of an electric motor including a continuous pole type rotor according to Embodiment 1 of the present invention.
  • An electric motor 100 shown in FIG. 1 includes a mold stator 10, a rotor 20, and a metal bracket 30 attached to one end portion in the axial direction of the mold stator 10.
  • the “axial direction” is equal to the stacking direction of the plurality of rotor cores constituting the rotor 20.
  • the electric motor 100 is a brushless DC motor having a permanent magnet in the rotor 20 and driven by an inverter.
  • the rotor 20 is an internal magnet type and a continuous pole type.
  • the mold stator 10 includes a stator 40 and a mold resin 50 that covers the stator 40, and the axial direction of the mold stator 10 coincides with the axial direction of the shaft 23 that penetrates the rotor 20.
  • the stator core 41 which is a constituent element of the stator 40
  • the coil 42 wound around the stator core 41, the insulating portion 43 provided on the stator core 41, and the insulating portion 43 are provided.
  • the neutral point terminal 44b is shown.
  • the board 45 attached to the insulating portion 43 which is a component of the stator 40
  • the lead wire lead part 46 assembled to the board 45, and the lead wire 47 lead out from the lead wire lead part 46.
  • an IC (Integrated Circuit) 49a mounted on the substrate 45 and a Hall IC 49b which is a magnetic sensor mounted on the surface of the substrate 45 on the rotor 20 side are shown.
  • the rotor 20 is mounted on the shaft 23, the resin portion 24 that integrates the main body of the rotor 20 and the shaft assembly 27, and the load-side rolling attached to the shaft 23 and supported by the bearing support portion 11 of the mold stator 10.
  • a bearing 21a and an anti-load-side rolling bearing 21b attached to the shaft 23 and supported by the bracket 30 are provided.
  • the load side 110 represents the end surface side from which the shaft 23 projects out of both end surfaces of the electric motor 100
  • the anti-load side 120 represents the end surface side on which the bracket 30 is provided.
  • the rotor 20 is installed at one end portion 5a of the rotor core 5 in the axial direction, and a plurality of position detection magnets 70 for detecting the position of the rotor core 5 in the rotation direction, and each of the position detection magnets 70 are mutually connected. And a plurality of connecting portions 71 for connecting the two.
  • the Hall IC 49b alternately detects a magnetic field generated in the axial direction from the position detection magnet 70 and a magnetic field generated in the axial direction from a first magnetic pole portion described later, and has a pulse shape corresponding to the detected change in the magnetic field. Output a signal.
  • the IC 49a calculates the position of the rotor 20 in the rotation direction based on the signal output from the Hall IC 49b and controls the rotation of the rotor 20. Detailed configurations of the position detection magnet 70 and the connecting portion 71 will be described later.
  • the shaft assembly 27 includes an insulating sleeve 26 including a pair of insulating sleeves 26-1 and 26-2, and the insulating sleeve 26 is disposed between the anti-load side rolling bearing 21 b and the shaft 23.
  • FIG. 2 is a cross-sectional view of the mold stator shown in FIG.
  • the mold stator 10 has an opening 10b at one end in the axial direction of the mold stator 10, and the rotor 20 is inserted into the opening 10b.
  • a hole 11a larger than the diameter of the shaft assembly 27 of the rotor 20 shown in FIG. 1 is formed at the axial end of the mold stator 10 into which the load-side rolling bearing 21a of the rotor 20 inserted into the opening 10b is fitted. Opened.
  • FIG. 3 is a cross-sectional view showing a state where a rotor is inserted into the mold stator shown in FIG. 3, the same components as those in FIG. 1 are denoted by the same reference numerals.
  • the rotor 20 inserted from the opening 10b of the mold stator 10 shown in FIG. 2 is arranged so that the load side of the shaft assembly 27 passes through the hole 11a shown in FIG.
  • the At this time, the load-side rolling bearing 21 a attached to the shaft 23 is pushed in until it contacts the bearing support portion 11 shown in FIG. 1 and is supported by the bearing support portion 11.
  • the bearing support portion 11 is an axial end portion of the mold stator 10 and is provided on the opposite side of the opening portion 10b.
  • the anti-load-side rolling bearing 21b is attached to the anti-load side of the shaft assembly 27.
  • the attachment of the anti-load side rolling bearing 21b is generally performed by press fitting.
  • an insulating sleeve 26 formed integrally with the shaft 23 is provided between the anti-load side rolling bearing 21b and the anti-load side of the shaft 23.
  • the bracket 30 shown in FIG. 1 closes the opening 10b of the mold stator 10 shown in FIG. 2 and supports the anti-load-side rolling bearing 21b shown in FIG. 3, and is press-fitted into the mold stator 10.
  • the bracket 30 includes a bearing support portion 30a and a press-fit portion 30b formed integrally with the bearing support portion 30a.
  • the bearing support portion 30a supports the anti-load side rolling bearing 21b.
  • the press-fit portion 30b has a ring shape.
  • the bracket 30 is attached to the mold stator 10 by press-fitting the press-fit portion 30b into the opening 10b side of the inner peripheral portion 10a of the mold stator 10.
  • the outer diameter of the press-fit portion 30b is larger than the inner diameter of the inner peripheral portion 10a of the mold stator 10 by the press-fit allowance.
  • the material of the bracket 30 include a galvanized steel plate, an aluminum alloy, an austenitic stainless alloy, a copper alloy, cast iron, steel, or an iron alloy.
  • the mold stator 10 shown in FIG. 2 includes a stator 40 and a mold resin 50 for molding.
  • An unsaturated polyester resin is used for the mold resin 50.
  • a bulk clay thermosetting resin (BMC) obtained by adding various additives to an unsaturated polyester resin is desirable for an electric motor.
  • Thermoplastic resins such as polybutylene terephthalate (PBT) and polyphenylene sulfide (PPS) also have a good aspect because they can recycle the runner during molding.
  • the unsaturated polyester resin and BMC have a linear expansion coefficient close to that of ferrous materials such as the stator core 41, the load side rolling bearing 21a, and the anti-load side rolling bearing 21b, and the thermal shrinkage rate is 1 of the thermoplastic resin. / 10 or less is excellent for obtaining dimensional accuracy.
  • the heat dissipation is excellent when the outer shell of the electric motor 100 is formed of unsaturated polyester resin and BMC. Further, when the outer shell of the electric motor 100 is formed of metal, the metal forming the outer shell of the electric motor 100 is separated from the coil 42 and the substrate 45 due to an insulating problem. On the other hand, since unsaturated polyester resin and BMC are insulators, there is no problem of insulation even when the coil 42 and the substrate 45 are covered, and since heat conductivity is high, the heat dissipation is excellent, and the high output of the electric motor 100 Contribute to
  • the load side rolling bearing 21 a is supported by the bearing support portion 11 formed of the mold resin 50, and the anti-load side rolling bearing 21 b and the bracket 30 are supported by the inner peripheral portion 10 a formed of the mold resin 50.
  • the axis of the rotor 20 and the axis of the stator 40 are deviated to cause vibration and noise.
  • an unsaturated polyester resin and BMC having a small heat shrinkage rate it becomes easy to ensure dimensional accuracy after molding.
  • Unsaturated polyester resin and BMC have linear expansion coefficients that are close to the linear expansion coefficients of ferrous materials such as the stator core 41, the load-side rolling bearing 21a, and the anti-load-side rolling bearing 21b. Deviation between the axis of the child 20 and the axis of the stator 40 can be suppressed.
  • the unsaturated polyester resin and BMC restrain the stator 40 when cured, the deformation of the stator 40 due to the excitation force of the electric motor 100 can be suppressed, and vibration and noise can be suppressed.
  • FIG. 4 is a configuration diagram of a stator core configured by a plurality of divided core portions and developed in a band shape.
  • the stator core 41 shown in FIG. 4 is obtained by arranging a plurality of divided core portions 400 such that each of the plurality of divided core portions 400 is in contact with another adjacent one of the plurality of divided core portions 400.
  • Each of the plurality of divided core portions 400 includes a back yoke 401 and teeth 402 protruding from the back yoke 401. Between adjacent back yokes 401, a thin portion 403 that connects the back yokes 401 is provided.
  • FIG. 5 is a diagram showing a state in which the developed stator core shown in FIG. 4 is bent and configured in an annular shape.
  • the annular stator core 41 shown in FIG. 5 is formed into an annular shape by folding the belt-shaped divided core portion 400 group at the thin portion 403 after the coils 42 of FIG. 1 are applied to each of the plurality of teeth 402 shown in FIG. Formed.
  • the stator core 41 composed of a plurality of divided core portions 400 can be wound with the coil 42 in a state of being developed in a band shape, so that the density of the coil 42 can be increased and high efficiency can be achieved. It is effective for conversion. However, since the split core portion 400 is connected by the thin wall portion 403, the rigidity of the stator core 41 when it is formed in an annular shape is low, and those having a large excitation force such as the continuous pole type electric motor 100 are not suitable. It is effective to mold the stator core 41 with a saturated polyester resin, that is, to cover the stator core 41 with an unsaturated polyester resin.
  • stator core 41 composed of a plurality of divided core portions 400 has a concavity and convexity at the end of the back yoke 401 in addition to the structure in which the back yokes 401 adjacent to each other are connected by a thin portion 403 as shown in FIG.
  • the structure may be such that a dowel is formed and the dowels are connected to each other, or a plurality of back yokes 401 separated from each other may be fixed together by welding or fitting.
  • the mold stator 10 satisfies the relationship of T1> T2. It is desirable to be configured.
  • the rigidity of the radially outer thickness T1 is increased by making the thickness T1 larger than the thickness T2.
  • “Radial direction” indicates the radial direction of the rotor 20.
  • the influence of the excitation force acting on the teeth 402 can be suppressed by providing the unsaturated polyester resin on the divided surface 404 between the adjacent divided core portions 400.
  • a hole 405 is formed in the split surface 404 of the annular stator core 41 shown in FIG.
  • the hole 405 is formed by providing a groove or notch between adjacent back yokes 401.
  • the holes 405 are filled with the unsaturated polyester resin.
  • the hole 405 does not need to be filled with unsaturated polyester in the entire region from one end surface to the other end surface in the axial direction of the stator core 41, and is slightly filled from one end surface in the axial direction of the stator core 41. Even in this case, the effect of damping the vibration can be expected.
  • the hole 405 of the dividing surface 404 can obtain the same effect even if it has a groove shape that opens to the outer peripheral surface of the stator core 41 or a groove shape that opens to the slot 406 side.
  • FIG. 6 is a cross-sectional view of the rotor shown in FIG.
  • the rotor 20 has an annular rotor core 5 and five magnet insertion holes 2 arranged in the circumferential direction.
  • “Circumferential direction” indicates the circumferential direction of the rotor 20.
  • the number of magnet insertion holes 2 is half the number of poles of the rotor 20.
  • the five magnet insertion holes 2 are arranged at equal intervals in the circumferential direction.
  • the five magnet insertion holes 2 are arranged at an equal distance from the rotation shaft 6.
  • the rotating shaft 6 coincides with the axis of the rotor core 5.
  • the five magnet insertion holes 2 penetrate the rotor core 5 in the axial direction.
  • the magnet insertion hole 2 is formed near the outer peripheral surface of the rotor core 5 and extends in the circumferential direction. Adjacent magnet insertion holes 2 are spaced apart.
  • the rotor core 5 has a shaft insertion hole 7 at the center.
  • the rotor core 5 is composed of a core material that is a soft magnetic material, and specifically, a plurality of electromagnetic steel plates are laminated.
  • the thickness of one electromagnetic steel sheet is generally 0.1 mm to 0.7 mm.
  • the five permanent magnets 1 are inserted into the five magnet insertion holes 2, respectively.
  • the permanent magnet 1 has a flat plate shape with a rectangular cross section. An example of the plate thickness of the permanent magnet 1 is 2 mm.
  • the permanent magnet 1 is a rare earth magnet and is a neodymium sintered magnet mainly composed of Nd (neodymium) -Fe (iron) -B (boron).
  • the magnet insertion hole 2 is composed of a rectangular first region 3A into which the permanent magnet 1 is inserted and two second regions 3B into which the permanent magnet 1 is not inserted.
  • the second region 3B is a first region 3B. One region is formed at each end in the longitudinal direction of the region 3A.
  • the second region 3B has a function of a flux barrier that suppresses the leakage magnetic flux a with respect to the permanent magnet 1 inserted in the first region 3A, and the magnetic flux density distribution on the outer peripheral surface of the rotor core 5 is determined. It has a function of short-circuiting the magnetic flux of the permanent magnet 1 inserted in the adjacent magnet insertion hole 2 through the rotor core 5 close to a sine wave.
  • the rotor 20 has ten magnetic poles arranged on the outer peripheral surface of the rotor core 5 so that the polarities are alternately arranged in the circumferential direction.
  • the rotor 20 is formed by five first magnetic poles each formed by five permanent magnets 1 and having the same polarity, and a rotor core 5 between the permanent magnets 1 adjacent to each other. It has five second magnetic poles having different polarities from the first magnetic poles.
  • the first magnetic pole is an N pole and the second magnetic pole is an S pole, but may be reversed.
  • the five permanent magnets 1 which are half the number of poles, each provide five first magnetic poles.
  • each of the five second magnetic poles having half the number of poles is formed on the core material of the rotor core 5 between the permanent magnets 1 adjacent to each other.
  • the second magnetic pole is a so-called salient pole and is formed by magnetizing the rotor 20.
  • the rotor 20 includes the first magnetic pole portion 60 having the first polarity by the permanent magnet 1 including the permanent magnet 1 and the second magnetic pole that is a core magnetic pole portion not including the permanent magnet 1 and is a virtual pole.
  • the second magnetic pole portions 61 are arranged alternately in the circumferential direction of the rotor 20.
  • the number of poles is an even number of 4 or more.
  • the outer shape of the rotor core 5 is a so-called flower circle shape.
  • the flower-circle shape is a shape in which the outer diameter of the rotor core 5 is maximum at the pole centers 62 and 63 and is minimum at the gap 64, and the arc from the pole centers 62 and 63 to the gap 64 is an arc shape. It is.
  • the pole center 62 is the pole center of the first magnetic pole
  • the pole center 63 is the pole center of the second magnetic pole.
  • the flower circle shape is a shape in which ten petals of the same shape and the same size are arranged at an equal angle. Therefore, the outer diameter of the rotor core 5 at the pole center 62 is equal to the outer diameter of the rotor core 5 at the pole center 63.
  • the circumferential width of the magnet insertion hole 2 is wider than the pole pitch.
  • FIG. 7 is a perspective view of a continuum pole type rotor according to the first embodiment of the present invention.
  • FIG. 8 is a front view of the rotor shown in FIG.
  • FIG. 9 is a perspective view of the annular magnet group shown in FIG.
  • the rotor 20 is provided at one end portion 5a of the rotor core 5 in the axial direction, and includes a plurality of position detection magnets 70 for detecting the position of the rotor core 5 in the rotation direction. Between the adjacent position detection magnets 70, a plurality of connecting portions 71 are provided, each connecting the position detection magnets 70 to each other.
  • An annular magnet group 72 is formed by alternately connecting the position detecting magnets 70 and the connecting portions 71.
  • each of the plurality of position detection magnets 70 the magnetic pole of each one end face 70b1 in the axial direction is the same as the magnetic pole of one end face 61a of the second polarity of the second magnetic pole portion 61 in the axial direction.
  • the magnetic pole of each other end face 70b2 in the direction is the same as the magnetic pole of the other end face 61b of the second polarity of the second magnetic pole part 61 in the axial direction, and is the same as the phase of the second magnetic pole part 61 in the rotational direction.
  • An example of the material of each of the plurality of position detection magnets 70 is a bond magnet.
  • the degree of freedom of processing of the position detection magnet 70 is increased compared to the case of using a sintered magnet. Therefore, the number of processing steps in manufacturing the position detection magnet 70 is reduced, and the position detection magnet is reduced. The manufacturing cost of 70 can be reduced.
  • Each of the plurality of connecting portions 71 may be made of the same material as the mold resin 50, or may be made of a magnet having the same polarity as the first polarity of the first magnetic pole portion 60.
  • the manufacturing cost of the rotor 20 can be reduced as compared with the case of constituting with a magnet.
  • the thickness of the connecting portion 71 in the axial direction is T3, the thickness of the position detecting magnet 70 in the axial direction is T4, the thickness of the connecting portion 71 in the radial direction is T5, and the thickness of the position detecting magnet 70 in the radial direction is T6.
  • the rotor 20 is configured such that the relationship of T4> T3 and T6> T5 is satisfied.
  • the magnetic flux leaking in the axial direction from the first magnetic pole portion 60 is larger than the magnetic flux leaking in the axial direction from the second magnetic pole portion 61. Therefore, the first magnetic field detected by the Hall IC 49b due to the magnetic flux leaking in the axial direction from the first magnetic pole portion 60 and the second magnetic field detected by the Hall IC 49b by the magnetic flux leaking from the second magnetic pole portion 61 in the axial direction. There is a possibility that the detection accuracy of the rotational position is lowered.
  • the rotor 20 includes a position detection magnet 70 at a position facing the second magnetic pole portion 61 in the one end portion 5a of the rotor core 5.
  • the motor 100 shown in FIG. 1 Since the phases in the rotation direction of the first magnetic pole portion 60 and the position detection magnet 70 detected by the Hall IC 49b are the same, the motor 100 shown in FIG. 1 has a magnetic flux leaking in the axial direction from the first magnetic pole portion 60. By using the magnetic flux leaking in the axial direction from the position detection magnet 70, the position of the rotor 20 can be detected with high accuracy.
  • the rotor 20 according to the first embodiment uses the number of position detection magnets 70 corresponding to half the total number of magnetic poles, the number of position detection magnets 70 corresponding to the total number of magnetic poles is used. Thus, an increase in the manufacturing cost of the rotor 20 can be suppressed while improving the position detection accuracy.
  • the electric motor 100 according to the first embodiment uses the annular magnet group 72, the assembly time of the rotor 20 is compared with the case where a plurality of position detection magnets 70 are individually manufactured and assembled to the rotor core 5. Can be shortened. Further, by using the annular magnet group 72, it is possible to reduce the risk that the position detecting magnet 70 is detached when the rotor 20 is assembled and the yield is lowered, and the position detecting magnet 70 is detached during the operation of the electric motor 100. The risk of scattering into the electric motor 100 can be reduced. Therefore, the electric motor 100 according to Embodiment 1 can improve the position detection accuracy while suppressing an increase in manufacturing cost of the electric motor 100 and suppressing a decrease in quality.
  • the following method can be illustrated as an installation method of the annular magnet group 72 to the rotor core 5.
  • a rib-like member (not shown) between the shaft 23 and the position detecting magnet 70 and providing a rib-like member (not shown) between the shaft 23 and the connecting portion 71, the rotor core 5
  • a ring-shaped magnet group 72 is installed.
  • a plurality of unillustrated pedestals arranged in the circumferential direction are provided at one end portion 5a of the rotor core 5 in the axial direction, and an annular magnet group 72 is installed in the pedestal group.
  • FIG. 10 is a diagram showing a first modification of the consequent pole type rotor according to the first embodiment of the present invention.
  • FIG. 11 is a front view of the rotor shown in FIG. 12 is a perspective view of the annular magnet group shown in FIG.
  • the difference between the rotor 20A shown in FIGS. 10, 11 and 12 and the rotor 20 shown in FIG. 7 is that the thickness of the connecting portion 71 in the radial direction is different.
  • the manufacturing cost of the annular magnet group 72 can be reduced without lowering the position detection accuracy as compared with the case where the thicknesses T3 and T5 of the connecting portion 71 are the same as the thicknesses T4 and T6 of the position detection magnet 70.
  • the thicknesses T3 and T5 of the connecting portion 71 are set in consideration of the strength that can prevent the rotors 20 and 20A from being damaged during manufacture and can prevent the motor 100 shown in FIG. 1 from being damaged during operation.
  • FIG. 13 is a view showing a second modification of the consequent pole type rotor according to the first embodiment of the present invention.
  • FIG. 14 is a front view of the rotor shown in FIG.
  • FIG. 15 is a first perspective view of the annular magnet group shown in FIG.
  • FIG. 16 is a second perspective view of the annular magnet group shown in FIG.
  • the difference between the rotor 20B shown in FIGS. 13, 14 and 15 and the rotor 20 shown in FIG. 7 is that the annular magnet group 72 of the rotor 20B has a plurality of protrusions 73 extending from the magnet group 72 in the axial direction. Is provided.
  • each of the plurality of protrusions 73 is disposed near both end faces 70 a in the circumferential direction of the position detection magnet 70, and the other end face of the position detection magnet 70 in the axial direction.
  • the shape extends in the axial direction from the 70b2 side.
  • pedestals 74 are provided on both end faces 70 a in the circumferential direction of the position detection magnet 70.
  • the pedestal 74 is installed on the other end face 70b2 of the position detecting magnet 70 in the axial direction.
  • the protrusion 73 is installed on the pedestal 74 and is formed so as to extend on the opposite side of the pedestal 74 from the position detecting magnet 70 in the axial direction.
  • the protrusion 73 and the base 74 are manufactured by integral molding with the annular magnet group 72.
  • each of the plurality of protrusions 73 is inserted into the second region 3 ⁇ / b> B constituting the magnet insertion hole 2. At this time, when the pedestal 74 is in contact with the one end portion 5a of the rotor core 5, each of the plurality of protrusions 73 is positioned in the axial direction.
  • the rotational position detection accuracy can be improved by matching the phases of first magnetic pole portion 60 and position detection magnet 70 detected by Hall IC 49b in the rotational direction.
  • the plurality of protrusions 73 inserted into the second region 3B function as positioning protrusions for the annular magnet group 72 in the rotation direction. Therefore, in the rotor 20 ⁇ / b> B, when the annular magnet group 72 is assembled, a shift between the phase in the rotation direction of the position detection magnet 70 and the phase in the rotation direction of the second magnetic pole portion 61 can be suppressed. Therefore, the electric motor 100 using the rotor 20B can improve the detection accuracy of the rotational position compared to the electric motor 100 using the rotor 20 or the rotor 20A.
  • the rotor 20B can be manufactured by integrally forming the protrusion 73 and the pedestal 74 with the annular magnet group 72, so that the position detection magnet 70 and an axial positioning member (not shown) are separately manufactured to manufacture the rotor core 5.
  • the assembly time of the rotor 20 can be shortened, and the number of parts to be manufactured can be reduced. Therefore, the yield is improved and the increase in the manufacturing cost of the rotor 20B can be suppressed.
  • FIG. FIG. 17 is a diagram illustrating an example of a configuration of an air conditioner according to Embodiment 2 of the present invention.
  • the air conditioner 300 includes an indoor unit 310 and an outdoor unit 320 connected to the indoor unit 310.
  • An indoor unit blower (not shown) is mounted on the indoor unit 310, and an outdoor unit blower 330 is mounted on the outdoor unit 320.
  • a compressor 340 is mounted on the outdoor unit 320.
  • the electric motor 100 according to Embodiment 1 is used for the indoor unit blower, the outdoor unit blower 330, and the compressor 340.
  • the electric motor 100 according to the first embodiment as a drive source for the indoor unit blower, the outdoor unit blower 330, and the compressor 340, the accuracy of the rotational position is improved, and the motor efficiency is improved. And the air conditioner 300 which can suppress manufacturing cost can be obtained.
  • the electric motor 100 according to the first embodiment can be mounted on an electric device other than the air conditioner 300, and in this case, the same effect as that of the present embodiment can be obtained.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Brushless Motors (AREA)

Abstract

Un rotor à pôles conséquents 20 comprend : une pluralité de premières sections de pôle magnétique 60 comprenant chacune une pluralité d'aimants permanents et ayant une première polarité en conséquence des aimants permanents ; une pluralité de secondes sections de pôle magnétique 61 formées chacune entre des aimants permanents mutuellement adjacents et ayant une seconde polarité différente de la première polarité ; et une pluralité d'aimants de détection de position 70 disposés au niveau d'une section d'extrémité 5a dans la direction axiale d'un noyau de rotor 5 et détectant la position dans la direction de rotation du noyau de rotor 5. Le pôle magnétique d'une surface d'extrémité, dans la direction axiale, de chaque aimant de la pluralité d'aimants de détection de position 70 est identique au pôle magnétique de ladite surface d'extrémité, ayant la seconde polarité, dans la direction axiale. Le pôle magnétique de l'autre surface d'extrémité de chacun, dans la direction axiale, est le même que le pôle magnétique de l'autre surface d'extrémité, ayant la seconde polarité, dans la direction axiale.
PCT/JP2016/074385 2016-08-22 2016-08-22 Rotor à pôles conséquents, moteur électrique et climatiseur Ceased WO2018037455A1 (fr)

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PCT/JP2016/074385 WO2018037455A1 (fr) 2016-08-22 2016-08-22 Rotor à pôles conséquents, moteur électrique et climatiseur
JP2018535463A JP6545393B2 (ja) 2016-08-22 2017-05-30 コンシクエントポール型の回転子、電動機および空気調和機
PCT/JP2017/020020 WO2018037652A1 (fr) 2016-08-22 2017-05-30 Rotor à pôles conséquents, moteur électrique et climatiseur
CN201790000484.7U CN208835850U (zh) 2016-08-22 2017-05-30 换向极型转子、电动机以及空调机

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PCT/JP2016/074385 WO2018037455A1 (fr) 2016-08-22 2016-08-22 Rotor à pôles conséquents, moteur électrique et climatiseur

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PCT/JP2017/020020 Ceased WO2018037652A1 (fr) 2016-08-22 2017-05-30 Rotor à pôles conséquents, moteur électrique et climatiseur

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CN108494174B (zh) * 2018-04-09 2019-06-04 新疆金风科技股份有限公司 气隙测量装置及风力发电机组
CN113519112A (zh) * 2019-03-08 2021-10-19 三菱电机株式会社 马达、风扇以及空气调节机
JP2021016228A (ja) * 2019-07-11 2021-02-12 シナノケンシ株式会社 ブラシレスモータ
FR3108806B1 (fr) * 2020-03-26 2023-04-14 Novares France Rotor pour moteur électrique équipé de capteur de tiges
JPWO2022254678A1 (fr) * 2021-06-04 2022-12-08

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US12046956B2 (en) 2020-04-25 2024-07-23 121352 Canada Inc. Electric motors and methods of controlling thereof

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JP6545393B2 (ja) 2019-07-17
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WO2018037652A1 (fr) 2018-03-01

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