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WO2021177803A1 - Rotor pour engrenage magnétique, son procédé de fabrication, engrenage magnétique le comprenant et module de propulsion le comprenant - Google Patents

Rotor pour engrenage magnétique, son procédé de fabrication, engrenage magnétique le comprenant et module de propulsion le comprenant Download PDF

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Publication number
WO2021177803A1
WO2021177803A1 PCT/KR2021/002852 KR2021002852W WO2021177803A1 WO 2021177803 A1 WO2021177803 A1 WO 2021177803A1 KR 2021002852 W KR2021002852 W KR 2021002852W WO 2021177803 A1 WO2021177803 A1 WO 2021177803A1
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WO
WIPO (PCT)
Prior art keywords
magnetic flux
rotation shaft
unit
permanent magnets
magnetic
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/KR2021/002852
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English (en)
Korean (ko)
Inventor
홍도관
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.)
Korea Electrotechnology Research Institute KERI
Original Assignee
Korea Electrotechnology Research Institute KERI
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 Korea Electrotechnology Research Institute KERI filed Critical Korea Electrotechnology Research Institute KERI
Publication of WO2021177803A1 publication Critical patent/WO2021177803A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H02K49/102—Magnetic gearings, i.e. assembly of gears, linear or rotary, by which motion is magnetically transferred without physical contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
    • B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
    • B64D27/02—Aircraft characterised by the type or position of power plants
    • B64D27/30—Aircraft characterised by electric power plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D35/00—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions
    • B64D35/04—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions characterised by the transmission driving a plurality of propellers or rotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
    • B64U50/00—Propulsion; Power supply
    • B64U50/30—Supply or distribution of electrical power
    • B64U50/39—Battery swapping
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

  • the present invention relates to a magnetic gear, and more particularly, to a magnetic gear rotor, a method for manufacturing the same, a magnetic gear including the same, and a propulsion module including the same.
  • a magnetic gear is a non-contact gear device that transmits power in a non-contact manner using magnetic force, unlike a contact gear that transmits power through physical contact. It is a gear device with excellent stability and durability because maintenance and inspection are unnecessary and there is no mechanical friction.
  • the magnetic gear can reduce energy loss, it is a gear device capable of high-efficiency driving compared to a contact-type gear, and accurate peak torque transmission.
  • the conventional magnetic gear if it is a configuration using a magnetic method, various configurations are possible, and as an example, as disclosed in Patent Document 1, an inner rotor and an outer rotor to which a permanent magnet is coupled, and a magnetic body are installed at regular intervals. It may be configured to include a pole piece unit positioned between the inner rotor and the outer rotor to induce the rotation of the other through rotation according to the input rotation of any one of the inner rotor and the outer rotor by controlling magnetic flux.
  • the conventional magnetic gear as shown in the conceptual diagrams of FIGS. 1 and 2 , magnetic flux through each of the permanent magnets 11 and 31 according to the relative rotation between the inner rotor 10 and the outer rotor 30 .
  • the inner rotor 10 and the outer rotor 30 and the inner rotor to control the magnetic flux between the inner rotor 10 and the outer rotor 30 It may include a pole piece unit 20 that is fixedly installed between the (10) and the outer rotor (30).
  • the inner rotor 10 includes a plurality of pole piece units 20 in which N poles and S poles are alternately disposed and is installed to be rotatable.
  • the outer rotor 30 includes a plurality of second permanent magnets 31 in which a preset number of N poles and S poles are alternately arranged in consideration of the rotation ratio with the inner rotor 10 and is installed to be rotatable. .
  • the pole piece unit 20 is fixedly installed between the inner rotor 10 and the outer rotor 30 to adjust the magnetic flux between the inner rotor 10 and the outer rotor 30 .
  • the pole piece unit 20 maintains a predetermined interval initially set between the inner rotor 10 and the outer rotor 30 even in a usage environment such as heat generation due to material loss due to high-speed rotation and frequency change. to achieve precise torque output.
  • the inner rotor 10 and the outer rotor 30 are a plurality of permanent magnets 11 and 31 arranged along the circumferential direction according to a preset gear ratio, and a plurality of permanent magnets 11 and 31 are fixed. It is configured to include a core (12, 32).
  • a plurality of permanent magnets 11 and 31 are fixed to the inner or outer circumferential surfaces of the cores 12 and 32 by an adhesive or the like.
  • the permanent magnets 11, 31 are attached, the permanent magnets 11, 31 ), the arrangement is disturbed by the magnetic force or the working time for fixing each of the permanent magnets 11 and 31 is relatively increased, thereby greatly reducing productivity.
  • the conventional magnetic gear is manufactured by fixing a plurality of permanent magnets 11 and 31 to the inner or outer circumferential surfaces of the cores 12 and 32 by means of an adhesive.
  • an adhesive There is a problem in that it is difficult to attach the permanent magnets 11 and 31 in consideration of the gap.
  • the conventional magnetic gear has a problem in that it is difficult to manufacture and the manufacturing time is significantly increased when the number of permanent magnets 11 and 31 is increased in consideration of the gear ratio and the like.
  • Patent Document 1 KR10-1457523 B1
  • An object of the present invention is to facilitate manufacturing and significantly reduce manufacturing costs by stacking an inner rotor and/or an outer rotor with an axial rotation module composed of a permanent magnet and a core in the axial direction in order to solve the above problems.
  • An object of the present invention is to provide a rotor for a magnetic gear capable of doing so, a method for manufacturing the same, a magnetic gear including the same, and a propulsion module including the same.
  • the present invention was created to achieve the object of the present invention as described above, and the present invention includes an inner magnetic flux part 100 to which a plurality of permanent magnets 130 are coupled to an outer circumferential surface, and the inner magnetic flux part 100 and It is located between the outer peripheral surface of the outer magnetic flux part 300 and the outer peripheral surface of the inner magnetic flux part 100 and the inner peripheral surface of the outer magnetic flux part 300 coaxial and a plurality of permanent magnets 330 are coupled to the inner peripheral surface to adjust the magnetic flux
  • the permanent magnets 130 and 330 fixed to the fixing rings 140 and 340 may be arranged to have a skew angle while going in the axial direction.
  • the inner magnetic flux unit 100 and the outer magnetic flux unit 300 may have skew angles in different directions.
  • the fixing rings 140 and 340 are coupled in the axial direction with respect to the first keys 410 and 430 formed on the support bodies 110 and 310 so as to maintain a coupling angle with the support bodies 110 and 310.
  • Second keys 420 and 440 may be formed.
  • It may include a housing 600 rotatably supporting the inner rotation shaft 150 of the inner magnetic flux part 100 and the outer rotation shaft 350 of the outer magnetic flux part 300 .
  • the housing 600 includes a housing body 610 that rotatably supports the outer magnetic flux part 300; A cover member 620 for rotatably supporting the inner magnetic flux part 100 may be included.
  • the present invention also includes a rotational force generating unit 2000 for generating a rotational force; a magnetic gear having the above configuration, the magnetic gear 1000 in which the rotational force generating unit 2000 is connected to any one of the inner rotation shaft 150 and the outer rotation shaft 350; A first propeller 3120 connected to any one of the inner rotation shaft 150 and the outer rotation shaft 350 of the magnetic gear 1000 and rotated to generate thrust and the inner rotation shaft of the magnetic gear 1000 ( 150) and a propulsion system including a thrust generating unit 3000 including a second propeller 3220 that is connected to the other one of the outer rotation shaft 350 and rotates to generate thrust.
  • the propulsion system may be a propulsion system of an aircraft or a marine vessel, a propulsion system of a drone, and the like.
  • a magnetic gear rotor, a method for manufacturing the same, a magnetic gear including the same, and a propulsion module including the same according to the present invention, an inner rotor and/or an outer rotor and an axial rotation module composed of a permanent magnet and a core are stacked in the axial direction
  • an inner rotor and/or an outer rotor and an axial rotation module composed of a permanent magnet and a core are stacked in the axial direction
  • FIG. 1 is a side view showing a conventional magnetic gear.
  • FIG. 2 is an exploded perspective view showing the configuration of the magnetic gear of FIG. 1 .
  • 3A is a cutaway perspective view showing an example of a magnetic gear according to the present invention.
  • FIG. 3B is a longitudinal cross-sectional view showing a modified example of the magnetic gear shown in FIG. 3A.
  • Fig. 4 is a cross-sectional view taken in the II-II direction in Fig. 3A.
  • FIG. 5A is an enlarged view of part A in FIG. 4 .
  • FIG. 5B is a cross-sectional view illustrating another example of a fixing structure of a permanent magnet as a modification of FIG. 4 .
  • FIG. 6 is an enlarged view of part B in FIG. 4 .
  • FIG. 7 is a graph showing the torque ripple reduction effect when the radially magnetized permanent magnet has the structure shown in FIGS. 5A and 6 .
  • FIG. 8A and 8B are graphs showing the torque ripple reduction effect when the permanent magnet of the radially magnetized inner rotor has the structure shown in FIG. 5A.
  • 9A and 9B are graphs showing the torque ripple reduction effect when the permanent magnet of the radially magnetized inner rotor part has the structure shown in FIG. 6 .
  • FIG. 10 is an exploded perspective view showing an inner magnetic flux unit, a pole piece unit, and an outer magnetic flux unit among the magnetic gears of FIG. 3A .
  • FIG. 11 is a perspective view showing the configuration of an inner magnetic flux part of the magnetic gear of FIG. 3A .
  • FIG. 12 is a cutaway perspective view showing the inner magnetic flux portion of FIG. 11 .
  • FIG. 13 is a perspective view illustrating a pole piece unit among the magnetic gears of FIG. 3A .
  • FIG. 14 is a cross-sectional view of the pole piece unit of FIG. 13 .
  • 15 is a perspective view showing the configuration of an outer magnetic flux part of the magnetic gear of FIG. 3A.
  • FIG. 16 is a cutaway perspective view showing the outer magnetic flux portion of FIG. 15 .
  • FIG. 17 is a photograph of the inner magnetic flux part shown in FIG. 11 , and is a photograph showing the inner magnetic flux part after the balancing process.
  • FIG. 18 is a perspective view showing an example of a propellant to which a magnetic gear according to the present invention is applied.
  • FIG. 19 is a cut-away perspective view of the propellant of FIG. 18 .
  • 20 is a perspective view showing an example applied to a drone among the propellants to which the magnetic gear according to the present invention is applied.
  • the magnetic gear is coaxial with the inner magnetic flux part 100 and the inner magnetic flux part 100 to which a plurality of permanent magnets 130 are coupled to the outer peripheral surface as shown in FIGS. 3A to 16 , and is formed on the inner peripheral surface.
  • the inner magnetic flux part 100 is a configuration in which a plurality of permanent magnets 130 are coupled to an outer circumferential surface, and various configurations are possible depending on a rotational or fixed structure.
  • the inner magnetic flux unit 100 is a rotatably installed structure, and includes an inner core portion to which a plurality of permanent magnets 130 are coupled to an outer circumferential surface, and an inner core portion coupled to the inner core portion to input or rotate rotation from the outside. It may include an inner rotation shaft 150 that receives the output.
  • the inner core part is a configuration in which a plurality of permanent magnets 130 are coupled to an outer circumferential surface, and a rotation is input or output from the outside through the coupled inner rotation shaft 150, and various configurations are possible.
  • the inner core part is hollow so that the inner rotation shaft 150 penetrates in the longitudinal direction and can be coupled thereto, and a plurality of permanent magnets 130 may be coupled to the outer circumferential surface.
  • the inner core part rotates the outer magnetic flux part 300 by the magnetic force acting through the plurality of permanent magnets 330 and the pole piece unit 200 installed in the outer magnetic flux part 300, or the outer magnetic flux It can be rotated by the part 300 .
  • the inner core part may be formed by stacking a plurality of electrical steel plates.
  • the permanent magnet 130 is a member that is coupled to the outer peripheral surface of the inner core part, and a magnetic force interacts with the plurality of permanent magnets 330 and the pole piece unit 200 installed in the outer magnetic flux part 300 , and has various configurations. This is possible.
  • a plurality of N poles and S poles may be alternately disposed on the outer peripheral surface of the inner core part in order, and the rotation ratio of the outer magnetic flux part 300 and the inner magnetic flux part 100 may be adjusted. It may be arranged with a preset number and circumferential length in consideration.
  • the plurality of permanent magnets 130 may be disposed at the same interval, and more preferably, may be disposed and coupled to have the same area along the outer circumferential surface of the inner core part.
  • the plurality of permanent magnets 130 may have a halved arrangement, and as shown in FIGS. 4, 5A and 5B, only the corners of the permanent magnets of the radially magnetized N pole and S pole have a rounding shape ( fillet), as shown in Fig. 7, the torque was almost unchanged, but it was confirmed that the torque ripple was greatly reduced.
  • the plurality of permanent magnets 130 may have a halved arrangement along the circumferential direction, and among them, it is preferable that only the corners of the permanent magnets of the radially magnetized N pole and S pole have a rounding shape (fillet). do.
  • the radius (r 1 ) is preferably 1.0 ⁇ 2.0mm, more preferably 1.5mm.
  • the plurality of permanent magnets 130 may have a halved arrangement along the circumferential direction, and only the corners of the permanent magnets of the radially magnetized N pole and S pole have a rounding shape (fillet), and rounding
  • the general conditions for the shape are as follows.
  • the rounding shape condition of the radially magnetized permanent magnet 130 among the permanent magnets 130 of the inner magnetic flux part 100 is, as shown in FIGS. 5A, 5B and 8 , the rounding shape radius of curvature.
  • the length of the arc of the outer peripheral surface of the permanent magnet 130 is l 2
  • the 2 ⁇ r 1 /l 2 value is preferably 13% to 39%, and more preferably 39%.
  • l 1 is defined as the arc length of the inner peripheral surface of the permanent magnet 130 .
  • the structure in which the permanent magnet 130 is coupled to the outer circumferential surface of the inner core portion has been described, but the arrangement method and the installation structure of the permanent magnet 130 may be variously modified.
  • the permanent magnet 130 may be separated from the outer peripheral surface of the first fixing ring 140 due to vibration during rotation.
  • the permanent magnet 130 may have a coupling protrusion 132 coupled to the coupling recess 142 formed in the first fixing ring 140 as shown in FIG. 5b .
  • the coupling groove 142 is a groove formed to prevent the permanent magnet 130 from being separated in a radial direction from the first fixing ring 140, and is preferably formed so that the width in the circumferential direction decreases in the radial direction. do.
  • the coupling protrusion 132 is a protrusion that is inserted into and fixed to the coupling groove 142 , and may have a shape corresponding to the shape of the coupling recess 142 , for example, a dove tail structure.
  • the dovetail structure can be applied to the permanent magnet fixing 330 in the inner magnetic flux unit 100 as well as the outer magnetic flux unit 300 .
  • carbon fiber on the outer peripheral surface of the permanent magnet 130 fixedly coupled to the inner core part It may be structurally reinforced by winding the composite material 180 (CFRP).
  • the carbon fiber composite material 180 is a carbon fiber sheet impregnated with a resin, a so-called pre-preg, and the carbon sheet is wound around the outer peripheral surface of the permanent magnet 130 fixedly coupled to the inner core part and impregnated with the resin. can be formed.
  • the application of the carbon fiber composite material 180 as described above can be applied to the inner and outer circumferential surfaces of the pole piece unit 200 and the inner circumferential surface 380 of the outer magnetic flux unit 300, which will be described later by smoothing each inner and outer circumferential surfaces.
  • the gap with the outer peripheral surface of the pole piece unit 200 can be made constant.
  • the inner rotation shaft 150 passes through a hollow formed in the inner core portion and is coupled to the inner core portion to transmit the power of the inner core portion to the outside, and various configurations are possible.
  • the inner rotation shaft 150 is coupled to the inner core portion through a hollow formed in the inner core portion, and when power is input to the inner magnetic flux portion 100, the inner rotation shaft 150 is externally It is possible to transmit the power transmitted from the power source coupled in the inner core part.
  • the inner rotation shaft 150 may be rotated by a rotational force input by the outer rotation shaft 350 to be described later.
  • the inner rotation shaft 150 may be installed in various structures according to an installation structure with the outer magnetic flux unit 300 to be described later.
  • the inner rotation shaft 150 may be installed to extend from one end to the other end of the pole piece unit 200 as shown in FIG. 3B .
  • FIG. 3b shows an example in which the inner magnetic flux part 100 and the outer magnetic flux part 300 are mechanically completely separated.
  • the rotation shaft support part 150 extending in the axial direction from the housing 600 may be installed to extend for stable rotation of the inner rotation shaft 150 .
  • rotation shaft support part 150 one or more bearings 730 and 731 are installed on the outer peripheral surface may rotatably support the inner rotation shaft 150.
  • the first support body 110 is radially extended by the radial extension portion 119 extending in the radial direction from the end portion of the inner rotation shaft 150 .
  • the pole piece unit 200 After extending to the pole piece unit 200 to be described later may be formed to extend in the longitudinal direction of the axial direction.
  • the inner magnetic flux part 100 has been described as a rotatably installed embodiment, of course, it may be configured in a fixed state according to a rotation combination.
  • the inner magnetic flux part 100 may be configured by a plurality of permanent magnet modules 120 to which the permanent magnet 130 and the inner core part to which the permanent magnet 130 is fixed are coupled in a divided state in the axial direction. have.
  • a first support body 110 formed to extend in the axial direction; It may include a permanent magnet module 120 fixedly coupled to the first support body 110 and sequentially installed in the axial direction.
  • the permanent magnet module 120, the plurality of permanent magnets 130 are fixedly coupled along the circumferential direction about the rotation axis (C) in the first fixing ring 140 - the role of the inner core divided in the axial direction It may include.
  • the first support body 110 may be configured integrally with or separately from the inner rotation shaft 150 , and various configurations are possible as a configuration in which a plurality of permanent magnet modules 120 and 320 are coupled.
  • the first support body 110 is preferably made of high-strength SUS, for example, SM45C, which is carbon steel for mechanical structure.
  • first support body 110 one or more bearings 720 are installed in a portion in contact with the outer rotation shaft 330 for rotatable support in the axial and/or radial direction with the outer rotation shaft 330 to be described later.
  • the first support body 110 may have a step 175 formed on the inner peripheral side for axial support for the bearing 720 .
  • first support body 110 may be rotatably installed with respect to the housing 600 to be described later by means of a shaft support bearing 730 .
  • first support body 110 may have a hollow 178-type structure partially empty as shown in FIG. 3A in order to minimize the overall weight.
  • a first key 430 coupled in the direction may be formed in the axial direction.
  • the permanent magnet module 120 is fixedly coupled to the first support body 110 and is sequentially installed in the axial direction, and various configurations are possible.
  • the permanent magnet module 120 includes a first fixing ring 140 in which a plurality of permanent magnets 130 and a plurality of permanent magnets 130 are fixedly coupled along a circumferential direction about a rotational axis C.
  • a first fixing ring 140 in which a plurality of permanent magnets 130 and a plurality of permanent magnets 130 are fixedly coupled along a circumferential direction about a rotational axis C.
  • the first fixing ring 140 is a configuration in which a plurality of permanent magnets 130 are fixedly coupled along the circumferential direction about the rotation axis C to constitute one permanent magnet module 120, and various configurations are possible. do.
  • the first fixing ring 140 is a configuration in which the inner core portion is divided in the direction of the rotation axis (C), and may be formed by stacking electrical steel plates.
  • a plurality of permanent magnets 130 are formed with a plurality of projections 141 on the outer peripheral surface so that they can be arranged with a preset circumferential gap. have.
  • the plurality of protrusions 141 are formed to protrude from the outer circumferential surface of the first fixing ring 140 so that the plurality of permanent magnets 130 arranged in the circumferential direction can be stably arranged, and various configurations are possible. .
  • Each of the protrusions 141 may be formed to correspond to the circumferential width of the permanent magnets 130 so that the corresponding permanent magnets 130 can be positioned between the adjacent protrusions 141 .
  • a protruding gap maintaining protrusion 131 may be additionally formed.
  • the gap maintaining protrusion 131 is configured to protrude in the circumferential direction to maintain a distance from the adjacent permanent magnet 130 among the side surfaces of the permanent magnet 130 , and may be formed by various methods.
  • the spacing protrusion 131 may be formed to protrude enough to maintain a distance from the adjacent permanent magnet 130 on one side of the side of the permanent magnet 130 in the circumferential direction.
  • the circumferential distance between the plurality of permanent magnets 130 may be maintained by various structures and methods, and an insulating sheet, epoxy, or the like may be used.
  • the permanent magnet module 120 composed of the first fixing ring 140 and the permanent magnet 130 is preferably installed at a distance from the permanent magnet 130 of the adjacent permanent magnet module 120, the adjacent The permanent magnet module 120 is preferably installed with a gap member (not shown) made of a thin non-magnetic material such as epoxy or insulating paper interposed therebetween.
  • the first fixing ring 140 is axial with respect to the first key 430 formed in the first support body 110 so as to maintain a coupling angle with the first support body 110 .
  • a second key 440 coupled thereto may be formed.
  • first key 430 and the second key 440 are configured to maintain a coupling angle between the first fixing ring 140 and the first support body 110, and any one of them is elongated in the axial direction.
  • the formed protrusion may be configured as a groove into which the other protrusion is inserted.
  • the permanent magnet 130 fixed to the first fixing ring 140 may be disposed to have a skew angle ( ⁇ 2 ) while going in the axial direction (C).
  • the skew angle ( ⁇ 2 ) is a predetermined skew angle ( ⁇ 2 ) with respect to the permanent magnet 130 fixed to the adjacent first fixing ring 140 while going in the axial direction (C), the circumference of the permanent magnet It may have various values depending on the direction length, the axial length, the number of batches, and the like.
  • the inner magnetic flux unit 100 and the outer magnetic flux unit 300 may have skew angles in different directions.
  • the skew angle ⁇ 2 is set to increase in one direction while going in the axial direction to reduce torque ripple, and various configurations are possible.
  • the plurality of permanent magnet modules 120 may be coupled by various methods, such as being bonded by an epoxy or an adhesive in the axial direction or mechanically coupled with an insulator interposed therebetween.
  • the inner magnetic flux unit 100 includes a pair of axial fixing members 190 installed to face each other in the axial direction for axial fixing of the plurality of permanent magnet modules 120 arranged in the axial direction.
  • the pair of axial fixing members 190 are installed to face each other in the axial direction for axial fixing with respect to the plurality of permanent magnet modules 120 arranged in the axial direction, and SUS in consideration of structural rigidity etc. may be used.
  • the inner rotation shaft 150 of the inner magnetic flux part 100 may be formed with an extension support part 170 extending in a radial direction to support the axial direction fixing member 190 in the axial direction.
  • the axial fixing member 190 is configured to prevent the permanent magnet 130 from being separated in the axial direction, and a non-magnetic material such as PEEK is preferably used to prevent magnetic flux leakage.
  • the pole piece unit 200 is positioned between the outer peripheral surface of the inner magnetic flux part 100 and the inner peripheral surface of the outer magnetic flux part 300 to adjust the magnetic flux, and various configurations are possible.
  • the pole piece unit 200 as shown in Figs. 3a to 10, 13 and 14, a plurality of pole pieces made of a magnetic material are installed spaced apart at regular intervals along the circumferential direction. members 220; a plurality of non-magnetic members 230 made of a non-magnetic material to which the pole piece member 220 maintains a distance between the adjacent pole piece members 220; A plurality of pole piece members 220 may be included.
  • the plurality of pole piece members 220 are magnetic materials installed to be spaced apart from each other at regular intervals along the circumferential direction, and various configurations are possible.
  • the plurality of pole piece members 220 may be installed to be spaced apart from each other at regular intervals along the circumferential direction, and according to the combination of the inner and outer permanent magnets 130 and 330 and the pole piece unit 200 , in advance A set number of pole piece members 220 may be installed.
  • the pole piece member 220 has a length corresponding to the longitudinal direction of the inner skin 210 according to the combination of the inner and outer permanent magnets 130 and 330 and the pole piece unit 200, in the longitudinal direction, that is, the axis It may have a structure in which a plurality of electrical steel sheets are stacked in the direction.
  • the plurality of non-magnetic members 230 are formed of a non-magnetic material, and the pole piece member 220 maintains a gap between the adjacent pole piece members 220 , and various configurations are possible.
  • the non-magnetic member 230 is a configuration that maintains the position and shape of the pole piece members 220 by being installed in the space between the pole piece members 220 adjacent to each other, and various configurations are possible. .
  • the non-magnetic member 230 may preferably have a material such as epoxy, engineering plastic such as PEEK, or glass fiber insulating material (composite material).
  • the pole piece member 220 and the non-magnetic member 230 have a cylindrical shape installed with a predetermined gap from the outer peripheral surface of the inner magnetic flux part 100 and the outer magnetic flux part 200 .
  • the pole piece member 220 and the non-magnetic member 230 may have a cylindrical shape according to various structures.
  • the non-magnetic member 230 has a cylindrical shape as a whole and the pole piece member 220 is inserted so that the pole piece member 220 is positioned along the circumferential direction.
  • the insertion groove 231 may be formed and configured.
  • pole piece member 220 and the non-magnetic member 230 are alternately arranged along the circumferential direction, and inner skin and outer skin may be installed on the inner and outer sides to maintain the overall shape of the cylindrical member.
  • the inner skin may have a CFRP material installed with a preset gap from the outer peripheral surface of the inner magnetic flux unit 100 for support and fixation of the pole piece member 220 .
  • the material may have a CFRP material.
  • pole piece unit 200 may be fixedly coupled to the housing 600 to be described later, and at this time, one end of the pole piece unit 200 may be fixedly coupled to the cover member 620 which is a part of the housing 600 . have.
  • the bearing 780 may be interposed and rotatably supported.
  • a step 271 may be formed to support the bearing 780 in the axial direction.
  • the material of the portion coupled to the housing 600 is preferably a non-magnetic material. If aluminum is used, eddy current loss may occur due to axial magnetic flux leakage due to the axial fringing effect, so it is preferable to use a non-magnetic material such as PEEK.
  • the pole piece unit 200 may be installed by various structures between the inner magnetic flux unit 100 and the outer magnetic flux unit 300 , and in particular, the mechanical According to the coupling structure, it can be installed by various structures.
  • 3B is an example in which the inner magnetic flux part 100 and the outer magnetic flux part 300 are completely mechanically separated, and the end forming part 272 installed at intervals on the outer circumferential surface of the inner rotation shaft 150 is a pole piece unit ( 200) may be coupled to the other end.
  • the outer magnetic flux part 300 is a configuration in which a plurality of permanent magnets 330 are coupled to an inner circumferential surface, and various configurations are possible depending on the rotation or fixed structure.
  • the external magnetic flux unit 300 includes a plurality of permanent magnets 330 in which a preset number of N poles and S poles are alternately arranged, and is a rotatably installed configuration, and various configurations are possible. do.
  • the outer magnetic flux unit 300, a plurality of permanent magnets 330 are coupled to the inner circumferential surface, the outer core portion is installed to be rotatable, and the outer core portion is coupled to the output or input rotation to the outside It may include an outer rotation shaft 350 .
  • the outer core part is a configuration that is installed to be rotatable and inputs or outputs rotation through the coupled outer rotation shaft 350, and various configurations are possible.
  • a plurality of permanent magnets 330 are coupled to an inner circumferential surface corresponding to the pole piece unit 200 , and an outer rotation shaft 350 is coupled to at least one of both sides in the longitudinal direction.
  • the outer core part has a cylindrical shape so that a plurality of permanent magnets 330 are installed on the inner circumferential surface, and the pole piece unit 200 and the inner magnetic flux unit 100 concentrically formed therein can be installed. This is preferable.
  • the outer core part may be formed by stacking a plurality of electrical steel plates.
  • the plurality of permanent magnets 330 are coupled to the inner peripheral surface of the outer core part, and induce magnetic flux changes according to relative rotation through the plurality of permanent magnets 130 and the pole piece unit 200 of the inner magnetic flux part 100 .
  • various configurations are possible.
  • a plurality of N poles and S poles may be alternately disposed on the inner circumferential surface of the outer core part in order, and the outer magnetic flux part 300 and the inner magnetic flux part 100 .
  • it may be arranged to have a preset number and a circumferential length.
  • the plurality of permanent magnets 330 may be arranged at regular intervals along the circumferential direction, and more preferably, may be arranged and coupled to have a constant area along the inner circumferential surface of the outer core part.
  • the plurality of permanent magnets 330 may have a halved arrangement, and as shown in FIGS. 4 and 6 , only the corners of the permanent magnets of the radially magnetized N pole and S pole have a rounding shape (fillet). As shown in FIG. 7 , it was confirmed that the torque was almost unchanged, but the torque ripple was greatly reduced.
  • the plurality of permanent magnets 330 may have a halved arrangement along the circumferential direction, and among them, it is preferable that only the corners of the N-pole and S-pole magnetized in the radial direction have a rounding shape (fillet). do.
  • the radius (r 2 ) is preferably 1.0 to 2.0 mm, more preferably 1.5 mm.
  • the torque ripple was the least when the rounding curvature of the permanent magnet 130 of the inner magnetic flux part 100 and the permanent magnet 330 of the outer magnetic flux part 300 was 1.5 mm, and the rounding Compared to the model without curvature, torque ripple was reduced by about 53.8%.
  • the plurality of permanent magnets 330 of the outer magnetic flux part 300 may have a halved arrangement along the circumferential direction, among which only the corners of the permanent magnets of the N and S poles magnetized in the radial direction are rounded. (fillet), and the general condition of the round shape is as follows.
  • the rounding shape condition of the radially magnetized permanent magnet 330 among the permanent magnets 330 of the outer magnetic flux part 300 is, as shown in FIGS. 6 and 9 , the rounding shape curvature radius of r 2 .
  • the 2 ⁇ r 2 /m 1 value is preferably 19% to 28%, more preferably 28%.
  • m 2 is defined as the arc length of the outer peripheral surface of the permanent magnet 230 .
  • the outer rotation shaft 350 is coupled to at least one side of both sides based on the longitudinal direction of the outer core portion to output a rotational force to the outside according to the change in the mutual magnetic flux of the inner magnetic flux portion 100 and the outer rotor portion 20, or to the inner side Various configurations are possible with the configuration for inputting the rotational force to the magnetic flux unit 100 .
  • the outer rotation shaft 350 is coupled to the outer core portion, and when power is input to the outer magnetic flux portion 300 , power transmitted from a power source coupled from the outside to the outer rotation shaft 350 . It can be transmitted to the outer core part.
  • outer rotation shaft 350 may be rotated by a rotational force input by the inner rotation shaft 150 .
  • the outer core part is positioned on the outer periphery of the pole piece unit 200 , and as shown in FIGS. 3A and 3B , may be coupled to the outer rotation shaft 350 by various structures.
  • the outer core part 340 may be coupled to an end support part 371 extending radially from the outer rotation shaft 350 as shown in FIG. 3A .
  • the outer core part 340 may be installed in a fixed state to the support body 310 , and one end of the support body 340 may be fixedly coupled to the end support part 371 .
  • the outer core part 340 is fixedly installed to the support body 312 having a 'U' shape in cross-section, and the support body 310 is fixed to the outer rotation shaft 350 by various structures. can be combined.
  • the outer rotation shaft 350 has a structure for coupling the 'U'-shaped support body 312, and the end support part 312 for coupling with the coupling end 312 protruding in the radial direction is integrally formed. It may be formed or combined as a separate member.
  • the external magnetic flux unit 300 has been described with reference to a rotatably installed embodiment, of course, it may be configured in a fixed state according to a rotation combination.
  • the outer magnetic flux unit 300 may be configured by a plurality of permanent magnet modules 320 to which the permanent magnet 330 and the outer core portion to which the permanent magnet 330 is fixed are coupled in a divided state in the axial direction. have.
  • the outer magnetic flux unit 300 includes a second support body 310 formed to extend in the axial direction as shown in FIGS. 3A to 10 , 13 and 14 ; It may include a permanent magnet module 320 fixedly coupled to the second support body 310 and sequentially installed in the axial direction.
  • the permanent magnet module 320 a plurality of permanent magnets 330 are fixedly coupled along the circumferential direction about the rotational axis C, the second fixing ring 340 - the role of the outer core divided in the axial direction It may include.
  • the second support body 310 may be configured integrally with or separately from the outer rotation shaft 350 , and various configurations are possible as a configuration in which a plurality of permanent magnet modules 320 are coupled.
  • the second support body 310 is preferably made of high-strength SUS, for example, SM45C, which is carbon steel for mechanical structure.
  • the second support body 310 one or more bearings 740 at a portion in contact with the pole piece unit 200 for rotatable support in the axial and/or radial direction with the pole piece unit 200 at the free end. ) can be installed.
  • the second support body 310 may be provided as an integral member or as a separate member for the installation of the bearing 740 .
  • one end of the second support body 310 is provided with a coupling hub 371 coupled to the outer rotation shaft 350 .
  • the coupling hub 371 is provided integrally with or separately from the second support body 310 to be coupled to the outer rotation shaft 350, and various configurations are possible.
  • the coupling hub 371 may be formed as a separate member or integrally with the outer rotation shaft 350 .
  • the outer rotation shaft 350 may be rotatably installed with respect to the housing 600 , particularly the housing body 610 , which will be described later by the shaft support bearing 710 .
  • the second fixing ring 340 is a second support body 310 to prevent the circumferential position fixing and slip of the second fixing ring 340 with respect to the second support body 310 to be described later.
  • the first key 410 formed on the inner peripheral surface of the second key 420 coupled in the axial direction may be formed on the inner peripheral surface in the axial direction.
  • first key 410 and the second key 420 are configured to maintain a coupling angle between the second fixing ring 340 and the second support body 310, and any one of them is elongated in the axial direction.
  • the formed protrusion may be configured as a groove into which the other protrusion is inserted.
  • the permanent magnet module 320 is fixedly coupled to the second support body 310 and is sequentially installed in the axial direction, and various configurations are possible.
  • the permanent magnet module 320 includes a second fixing ring 340 in which a plurality of permanent magnets 330 and a plurality of permanent magnets 330 are fixedly coupled along a circumferential direction about a rotational axis C.
  • a second fixing ring 340 in which a plurality of permanent magnets 330 and a plurality of permanent magnets 330 are fixedly coupled along a circumferential direction about a rotational axis C.
  • the second fixing ring 340 is a configuration in which a plurality of permanent magnets 330 are fixedly coupled along the circumferential direction about the rotation axis C to constitute one permanent magnet module 320, and various configurations are possible. do.
  • the second fixing ring 340 is a configuration in which the outer core is divided in the direction of the rotation axis (C), and may be formed by stacking electrical steel plates.
  • a plurality of permanent magnets 330 may be formed with a plurality of protrusions 341 on the inner circumferential surface so that they can be arranged with a preset circumferential gap. have.
  • the plurality of protrusions 341 are formed to protrude from the inner circumferential surface of the second fixing ring 340 so that the plurality of permanent magnets 330 arranged in the circumferential direction can be stably arranged, and various configurations are possible. .
  • Each of the protrusions 341 may be formed to correspond to the circumferential width of the permanent magnets 330 so that the corresponding permanent magnets 330 may be positioned between the adjacent protrusions 341 .
  • the distance in the circumferential direction of the plurality of permanent magnets 330 may be maintained by various structures and methods, and an insulating sheet, epoxy, etc. may be used.
  • the permanent magnet module 320 composed of the second fixing ring 340 and the permanent magnet 330 is preferably installed at a distance from the permanent magnet 330 of the adjacent permanent magnet module 320, and adjacent The permanent magnet module 320 is preferably installed with a gap member (not shown) made of a thin non-magnetic material such as epoxy or insulating paper interposed therebetween.
  • the second fixing ring 340 in the axial direction with respect to the first key 410 formed in the second support body 310 so as to maintain the angle of engagement with the second support body 310 .
  • a second key 420 coupled thereto may be formed.
  • the permanent magnet 330 fixed to the second fixing ring 340 may be disposed to have a skew angle ( ⁇ 1 ) while going in the axial direction (C).
  • the skew angle ( ⁇ 1 ) is a preset skew angle ( ⁇ 1 ) with respect to the permanent magnet 330 fixed to the adjacent second fixing ring 340 while going in the axial direction (C), and the circumference of the permanent magnet It may have various values depending on the direction length, the axial length, the number of batches, and the like.
  • the inner magnetic flux unit 100 and the outer magnetic flux unit 300 may have skew angles in different directions.
  • the plurality of permanent magnet modules 320 may be coupled by various methods, such as being bonded by an epoxy or an adhesive in the axial direction or mechanically coupled with an insulator interposed therebetween.
  • the outer magnetic flux unit 300 includes a pair of axial fixing members 390 installed to face each other in the axial direction for fixing the plurality of permanent magnet modules 320 in the axial direction.
  • the axial fixing member 390 is configured to prevent the permanent magnet 330 from being separated in the axial direction, and a non-magnetic material such as PEEK is preferably used to prevent magnetic flux leakage.
  • the assembly configuration having the axial fixing member 390 and the outer core portion may be fixedly coupled to the shaft coupling portion 370 coupled to the outer rotation shaft 350 by a bolt or the like.
  • the shaft coupling part 370 is a configuration that is fixedly coupled to the outer rotation shaft 350 and combines the assembly configuration having the axial direction fixing member 390 and the outer core part and the outer rotation shaft 350, and may be composed of a hub or the like. .
  • the magnetic gear according to the present invention may include a housing 600 in which the inner magnetic flux unit 100 , the pole piece unit 200 , and the outer magnetic flux unit 300 are stably installed.
  • the housing 600 is a configuration in which the inner magnetic flux unit 100, the pole piece unit 200, and the outer magnetic flux unit 300 are installed therein, and various configurations are possible.
  • the housing 600 may include a housing body 610 having a cylindrical shape with one open end, and a cover member 620 covering the open portion of the housing body 610 .
  • the cover member 620 is a member that covers the open portion of the housing body 610 , and may be coupled to the housing body 610 by a bolt or the like.
  • the housing body 610 and the cover member 620 may have various configurations depending on the support shaft.
  • a first through hole is formed in the center so that the inner rotation shaft 150 is exposed to the outside, and the housing body 610 has an outer rotation shaft on the opposite side to the portion to which the cover member 620 is coupled.
  • a second through hole may be formed in the center so that the 350 is exposed to the outside.
  • the magnetic gear having the above configuration is a rotating device involving rotation of one or more axes, for example, the inner rotation shaft 150 of the inner magnetic flux unit 100 and the outer rotation shaft 350 of the outer magnetic flux unit 300 . constituting the bar, there is a problem that vibration may occur due to an imbalance in weight after final assembly.
  • the magnetic gear having the above configuration is balancing through rotation in an assembly state composed of the inner magnetic flux unit 100, the pole piece unit 200 and the outer magnetic flux unit 300, that is, balancing the rotational moment of inertia.
  • it can be manufactured through a balancing process in which a part of the rotational configuration is removed by a processing device such as a milling machine.
  • the rotational configuration may be a rotating member, for example, the inner magnetic flux unit 100 and the outer magnetic flux unit 300 .
  • balancing through rotation that is, to balance the rotational moment of inertia, processing apparatus such as a milling machine This is a process of removing a part of the rotating component by means of various methods.
  • the balancing process analyzes vibration through rotation in an assembly state composed of the inner magnetic flux unit 100, the pole piece unit 200 and the outer magnetic flux unit 300, and is rotated according to the vibration analysis, This may be performed by removing a portion of at least one of the inner magnetic flux unit 100 and the outer magnetic flux unit 300 .
  • a part of the pair of axial fixing members 190 may be removed through milling or the like according to vibration analysis.
  • the pair of axial fixing members 190 are at least one specified in the radial and circumferential directions from the inner rotation shaft 150 in order to solve the imbalance according to the vibration analysis. It is possible to reduce the vibration during rotation by changing the rotational moment of inertia by removing a part through milling at the removal position.
  • the axial fixing part 390 and the shaft coupling part 370 are milled at one or more removal positions specified in the radial and circumferential directions from the inner rotation shaft 150 in order to solve the imbalance according to the vibration analysis. It is possible to reduce the vibration during rotation by changing the rotational moment of inertia by removing a part through the etc.
  • the balancing process it may be performed by various methods, such as being performed for both the inner magnetic flux unit 100 and the outer magnetic flux unit 300 , or at least one of them.
  • vibration is analyzed through rotation in an assembly state composed of the inner magnetic flux unit 100, the pole piece unit 200 and the outer magnetic flux unit 300, and the inner magnetic flux unit ( 100) and a balancing process of removing a portion of both of the external magnetic flux unit 300 may be performed.
  • a first balancing process of analyzing vibration through rotation and removing a part of the inner magnetic flux part 100 according to the vibration analysis can be performed.
  • the vibration is analyzed through rotation in a rotation jig that rotatably supports the outer magnetic flux unit 300 separately from the performance of the first balancing process described above, and part of the outer magnetic flux unit 300 according to the vibration analysis A tertiary balancing process that removes
  • the magnetic gear may be manufactured by assembling the inner magnetic flux unit 100 , the pole piece unit 200 , and the outer magnetic flux unit 300 .
  • the magnetic gear having the above configuration may implement various rotational driving by connecting at least two of the inner magnetic flux unit 100 , the pole piece unit 200 and the outer magnetic flux unit 300 to the rotating shaft.
  • the magnetic gear shown in FIGS. 1 to 16 may be applied to the propulsion system shown in FIGS. 18 to 20 .
  • the propulsion system a rotational force generating unit 2000 for generating a rotational force
  • the magnetic gear 1000 having the above configuration, the rotational force generating unit 2000 is connected to any one of the inner rotation shaft 150 and the outer rotation shaft 350;
  • the first propeller 3120 that is connected to any one of the inner rotation shaft 150 and the outer rotation shaft 350 of the magnetic gear 1000 and rotates to generate thrust and the inner rotation shaft 150 and the outer rotation shaft of the magnetic gear 1000 It may include a thrust generating unit 3000 including a second propeller 3220 that is connected to the other one of the 350 and rotates to generate a thrust.
  • the rotational force generating unit 2000 is a configuration for generating rotational force, and various configurations are possible, such as generating rotational force by an engine such as a jet engine or an internal combustion engine, or generating rotational force by electricity such as an electric motor.
  • the rotational force generating unit 2000 may be installed inside the body 910, which may be exposed to water in the case of an underwater body.
  • the body 910 may be connected by a connection part 920 for connection with a body such as a ship or an aircraft.
  • the magnetic gear 1000 is a magnetic gear having the configuration described above, and the rotational shaft 2100 of the rotational force generating unit 2000 is connected to any one of the inner rotational shaft 150 and the outer rotational shaft 350 to generate a rotational force generating unit ( 2000), and various configurations are possible.
  • both the inner rotation shaft 150 and the outer rotation shaft 350 must be located coaxially, and as shown in FIG. 19 , the inner rotation shaft 150 is the rotational force generating unit 2000 of It may be connected to the rotation shaft 2100 and penetrate the hollow structure of the outer rotation shaft 350 in the structures of FIGS. 1 to 16 to be connected to a second propeller 3220 to be described later.
  • the thrust generating unit 3000, the rotating shaft 2100 of the rotating force generating unit 2000 is connected to any one of the inner rotating shaft 150 and the outer rotating shaft 350 is rotated to generate a thrust first propeller (3120) and a second propeller 3220 connected to the other of the inner rotation shaft 150 and the outer rotation shaft 350 of the magnetic gear 1000 and rotated to generate thrust, and various configurations are possible.
  • the first propeller 3120 is a configuration in which the rotation shaft 2100 of the rotational force generating unit 2000 is connected to any one of the inner rotation shaft 150 and the outer rotation shaft 350 and rotates to generate thrust. possible.
  • the first propeller 3120 may be composed of a plurality of blades coupled along the circumferential direction to the hollow rotation shaft 3110 connected to the inner rotation shaft 150 .
  • the second propeller 3220 is connected to the other one of the inner rotation shaft 150 and the outer rotation shaft 350 of the magnetic gear 1000 and rotates to generate thrust, and various configurations are possible.
  • the second propeller 3220 includes a plurality of blades coupled along the circumferential direction to the rotation shaft 3210 connected to the outer rotation shaft 350 through the inner rotation shaft 150 and the hollow rotation shaft 3110.
  • first propeller 3120 and the second propeller 3220 are rotated opposite each other according to the rotation structure of the magnetic gear 1000 .
  • the propulsion efficiency can be maximized according to the propulsion environment.
  • the rotation shaft 2100 of the rotational force generating unit 2000 and the rotation shaft 3210 of the second propeller 3220 are connected to the rotation shaft 2100 of the rotational force generating unit 2000 and the second propeller
  • the rotational speed of the 3220 is the same, and the rotational shaft 3210 of the second propeller 3220 is decelerated by the magnetic gear 1000 so that the rotational speed is smaller than the rotational speed of the rotational shaft 2100 of the rotational force generating unit 2000. can be rotated.
  • the propulsion system having the above configuration may be any system requiring thrust, such as a propulsion system of an aircraft or a marine vessel, or a propulsion system of a drone, as shown in FIG. 20 .
  • FIG. 20 is a view showing a state in which the magnetic gear 1000 according to the present invention is coupled to the electric motor 2000, and has a structure substantially similar to the structure shown in FIG. 19, and thus detailed drawings will be omitted.
  • the propulsion system includes a first propeller 3120 and a second propeller 3220 that are rotated opposite each other by a rotational force generating unit 2000 such as an electric motor, and a magnetic gear 1000.
  • a counter-rotating (coaxial inversion) propeller As an alternative to such a single propeller, if a counter-rotating (coaxial inversion) propeller is applied, it is possible to realize in-situ flight performance, and it can be applied as a method of reducing the diameter of the propeller and increasing the thrust.
  • a propeller is applied for aviation, especially drone, it has the advantage of realizing in-situ flight performance and reducing the diameter of the propeller and increasing the thrust.
  • the propulsion system according to the present invention is a first propeller 3120 and a second propeller ( 3220), an electric motor and a drive can inherently implement counter-rotation in one, and the structure is relatively simple, and there is an advantage in that the burden on upper-level control can be reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Power Engineering (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

La présente invention concerne un engrenage magnétique et, plus spécifiquement, un rotor pour un engrenage magnétique, son procédé de fabrication, un engrenage magnétique le comprenant et un module de propulsion le comprenant. La présente invention concerne un engrenage magnétique comprenant : une partie de flux magnétique interne (100) ayant une pluralité d'aimants permanents (130) couplés à la surface circonférentielle externe de celle-ci ; une partie de flux magnétique externe (300) qui est disposé de manière coaxiale avec la partie de flux magnétique interne (100) et comporte une pluralité d'aimants permanents (330) couplés à la surface circonférentielle interne de celle-ci ; et une unité de pièce polaire (200) disposée entre la surface circonférentielle externe de la partie de flux magnétique interne (100) et la surface circonférentielle interne de la partie de flux magnétique externe (300) pour réguler le flux magnétique, dans lequel : au moins l'une de la partie de flux magnétique interne (100) et de la partie de flux magnétique externe (300) comprend un corps de support (110, 310) s'étendant dans la direction axiale et un module d'aimant permanent (120, 320) couplé de manière fixe au corps de support (110, 310) et installé de manière séquentielle dans la direction axiale ; et le module d'aimant permanent (120, 320) comprend une bague de fixation (140, 340) à laquelle la pluralité d'aimants permanents (130, 330) sont couplés de manière fixe autour d'un axe de rotation le long de la direction circonférentielle.
PCT/KR2021/002852 2020-03-06 2021-03-08 Rotor pour engrenage magnétique, son procédé de fabrication, engrenage magnétique le comprenant et module de propulsion le comprenant Ceased WO2021177803A1 (fr)

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