WO2023106338A1 - Moteur - Google Patents

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Publication number
WO2023106338A1
WO2023106338A1 PCT/JP2022/045127 JP2022045127W WO2023106338A1 WO 2023106338 A1 WO2023106338 A1 WO 2023106338A1 JP 2022045127 W JP2022045127 W JP 2022045127W WO 2023106338 A1 WO2023106338 A1 WO 2023106338A1
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WO
WIPO (PCT)
Prior art keywords
coil
sheet
conductor
end portion
coil end
Prior art date
Application number
PCT/JP2022/045127
Other languages
English (en)
Japanese (ja)
Inventor
俊一 寺田
大樹 土方
幸彦 杉本
Original Assignee
株式会社小松製作所
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 株式会社小松製作所 filed Critical 株式会社小松製作所
Publication of WO2023106338A1 publication Critical patent/WO2023106338A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present disclosure relates to motors.
  • Patent Document 1 In the technical field related to motors, an electric motor as disclosed in Patent Document 1 is known.
  • the motor has a coil. If the temperature of the coil rises excessively, the insulating film covering the coil may deteriorate. Deterioration of the insulating film may degrade the performance of the motor.
  • the present disclosure aims to cool the coils of the motor.
  • a rotor that rotates about a rotation axis and a stator disposed around the rotor
  • the stator including a stator core and coil end portions that are supported by the stator and protrude axially from the stator core. and an insulating sheet supported by the coil and protruding axially from the coil end, the rotor having a supply port for supplying a cooling medium to the coil end.
  • the coils of the motor are cooled.
  • FIG. 1 is a cross-sectional view schematically showing the motor according to the first embodiment.
  • FIG. 2 is a perspective view showing the stator according to the first embodiment.
  • FIG. 3 is a radial view of the coil and sheet according to the first embodiment.
  • FIG. 4 is a view of the coil and sheet according to the first embodiment as seen from the circumferential direction.
  • FIG. 5 is a radial view of the coil and sheet according to the second embodiment.
  • FIG. 6 is a view of the coil and sheet according to the second embodiment as seen from the circumferential direction.
  • FIG. 7 is a radial view of the coil and sheet according to the third embodiment.
  • FIG. 8 is a view of the coil and sheet according to the third embodiment as seen from the circumferential direction.
  • FIG. 9 is a radial view of the coil and sheet according to the fourth embodiment.
  • FIG. 10 is a view of the coil and sheet according to the fourth embodiment as seen from the circumferential direction.
  • FIG. 11 is a perspective view showing a stator according to the fifth embodiment.
  • FIG. 12 is a perspective view showing a coil set and a sheet according to the fifth embodiment;
  • FIG. 13 is a perspective view showing a coil set and a sheet according to the sixth embodiment.
  • FIG. 14 is a perspective view showing a coil set and a sheet according to the seventh embodiment;
  • FIG. 15 is a perspective view showing a coil set and a sheet according to the eighth embodiment;
  • FIG. 16 is a diagram showing a sheet according to the first example.
  • FIG. 17 is a diagram showing a sheet according to the second example.
  • FIG. 18 is a diagram showing a seat according to the third example.
  • FIG. 19 is a cross-sectional view showing a coil in which sheets according to the third example are
  • FIG. 1 is a cross-sectional view schematically showing a motor 1 according to an embodiment.
  • the motor 1 is a switched reluctance motor.
  • motor 1 includes rotor 2 , stator 3 and housing 4 .
  • the motor 1 is an inner rotor type.
  • Stator 3 is arranged around rotor 2 .
  • the rotor 2 rotates around the rotation axis AX.
  • a housing 4 is arranged around the stator 3 .
  • the direction parallel to the rotation axis AX of the rotor 2 is appropriately referred to as the axial direction
  • the direction of rotation around the rotation axis AX is appropriately referred to as the circumferential direction
  • the radial direction of the rotation axis AX is appropriately referred to as the circumferential direction. called the radial direction.
  • a direction away from or far from the center of the motor 1 in the axial direction is appropriately referred to as one axial side, and the opposite side of the one axial side is referred to as the other axial side.
  • a prescribed direction in the circumferential direction is appropriately referred to as a circumferential one side, and a side opposite to the circumferential one side is appropriately referred to as a circumferential other side.
  • a direction away from or far from the rotation axis AX in the radial direction is appropriately referred to as a radially outer side, and a radially opposite side to the radially outer side is appropriately referred to as a radially inner side.
  • the rotor 2 has a rotor shaft 21, a rotor core 22 arranged around the rotor shaft 21, and blades 23 arranged on one end face and the other end face of the rotor core 22 in the axial direction.
  • the rotor shaft 21 is a rod-shaped member extending in the axial direction.
  • the rotor core 22 is arranged around the rotor shaft 21 .
  • the rotor core 22 is a magnetic body.
  • the blades 23 are arranged on the one axial end face of the rotor core 22 and the other axial end face of the rotor core 22 .
  • a rotor core 22 is sandwiched between a pair of blades 23 .
  • the rotor shaft 21, rotor core 22 and blades 23 are fixed.
  • the stator 3 has a stator core 31 , a plurality of coils 32 supported by the stator core 31 , and an insulating sheet 50 supported by the coils 32 .
  • Stator core 31 is a cylindrical member arranged around rotor core 22 .
  • Stator core 31 is a magnetic body.
  • Coil 32 is wound around teeth of stator core 31 via an insulator.
  • Coil 32 includes coil end portions 16 that axially protrude from stator core 31 .
  • the sheet 50 axially protrudes from the coil end portion 16 .
  • the coil end portions 16 are arranged on one axial side and the other axial side of the stator core 31 .
  • the seat 50 is supported by the coil end portion 16 on one side in the axial direction and the coil end portion 16 on the other side in the axial direction.
  • the housing 4 houses at least part of the rotor 2 and the stator 3.
  • Stator core 31 is fixed to the inner surface of housing 4 .
  • the rotor shaft 21 is rotatably supported by a pair of bearings 41 .
  • a bearing 41 is supported by the housing 4 .
  • a seal member 42 is provided between the outer surface of the rotor shaft 21 and the housing 4 .
  • the rotor 2 has supply ports 25 for supplying cooling medium to the coil end portions 16 .
  • the supply port 25 is provided on the blade 23 .
  • a plurality of supply ports 25 are provided at intervals in the circumferential direction.
  • the cooling medium is oil.
  • the supply port 25 is arranged radially inside the coil 32 .
  • the supply port 25 is arranged so as to face radially outward.
  • the supply port 25 jets the cooling medium toward the coil end portion 16 from the radially inner side of the coil end portion 16 .
  • the supply port 25 is arranged inside the end surface 34 of the coil end portion 16 in the axial direction.
  • the supply port 25 can face the radially inner inner surface 35 of the coil end portion 16 .
  • the rotor 2 has a supply passage 26 provided inside the rotor shaft 21 , a supply passage 27 provided inside the rotor core 22 , and a supply passage 28 provided inside the blades 23 .
  • the supply passage 27 connects the supply passage 26 and the supply passage 28 .
  • the supply passage 27 is connected to a supply passage 43 provided inside the housing 4 .
  • a coolant supply portion 44 such as a pump and the supply passage 43 of the housing 4 are connected.
  • the coolant sent from the coolant supply portion 44 flows into the supply passage 26 via the supply passage 43 .
  • the cooling medium that has flowed through the supply passage 26 is supplied to the supply port 25 via the supply passages 27 and 28 .
  • the supply port 25 supplies the cooling medium supplied through the supply passage 26 , the supply passage 27 and the supply passage 28 to the coil end portion 16 .
  • the cooling medium is jetted from the supply port 25 to the coil end portion 16 .
  • At least part of the cooling medium injected from the supply port 25 hits the inner surface 35 of the coil end portion 16 . As a result, at least the radially inner portion of the coil end portion 16 is cooled by the cooling medium.
  • At least part of the cooling medium injected from the supply port 25 may move radially outward so as to pass through the end surface 34 of the coil end portion 16 .
  • a sheet 50 is provided that axially protrudes from the end surface 34 of the coil end portion 16 . At least part of the cooling medium jetted from the supply port 25 hits the sheet 50 . The sheet 50 prevents the cooling medium jetted from the supply port 25 from moving radially outward of the coil end portion 16 . The cooling medium that hits the sheet 50 is supplied to the coil end portion 16 along the sheet 50 .
  • a plurality of sheets 50 are arranged in the radial direction. At least part of the sheet 50 is arranged radially outside the center of the coil end portion 16 .
  • the cooling medium jetted from the supply port 25 and hitting the sheet 50 travels along the sheet 50 to the radially outer portion of the coil end portion 16 . Supplied in parts. As a result, the radially outer portion of the coil end portion 16 is cooled by the cooling medium.
  • the refrigerant medium injected from the supply port 25 directly hits the coil end portion 16 , thereby cooling at least the radially inner portion of the coil end portion 16 , and the refrigerant medium injected from the supply port 25 hits the sheet 50 .
  • the radially outer portion of the coil end portion 16 is cooled.
  • the coil end portions 16 are evenly cooled.
  • the rotor shaft 21 is connected to the object RS.
  • An example of the object RS is an engine mounted on a hybrid excavator, which is a type of construction machine.
  • the motor 1 functions as a generator driven by the engine.
  • the motor 1 may be of a vertical type or a horizontal type. That is, the motor 1 may be arranged so that the rotation axis AX and the vertical direction are parallel, or may be arranged so that the rotation axis AX and the vertical direction are orthogonal.
  • At least some of the plurality of supply ports 25 may be arranged outside the end face 34 in the axial direction, and the cooling medium may be jetted toward the end face 34 .
  • FIG. 2 is a perspective view showing the stator 3 according to the embodiment.
  • the stator core 31 includes a plurality of laminated steel plates.
  • Stator core 31 has yoke 9 and teeth 10 .
  • the yoke 9 is arranged around the rotation axis AX.
  • the yoke 9 has a cylindrical shape around the rotation axis AX.
  • the teeth 10 protrude radially inward from the inner surface of the yoke 9 .
  • a plurality of teeth 10 are arranged at intervals in the circumferential direction. In the embodiment, 24 teeth 10 are provided.
  • the surface of the stator core 31 includes an end surface 31A, an end surface 31B, an inner surface 31S, and an outer surface 31T.
  • the end surface 31A faces one side in the axial direction.
  • the end face 31A includes an end face of the yoke 9 facing one side in the axial direction and an end face of the tooth 10 facing one side in the axial direction.
  • the end face of the yoke 9 and the end face of the teeth 10 are flush with each other.
  • the end surface 31A and an axis parallel to the rotation axis AX are orthogonal.
  • the end surface 31B faces the other side in the axial direction.
  • the end surface 31B includes an end surface of the yoke 9 facing the other side in the axial direction and an end surface of the teeth 10 facing the other side in the axial direction.
  • the end face of the yoke 9 and the end face of the teeth 10 are flush with each other.
  • the end surface 31B and an axis parallel to the rotation axis AX are orthogonal.
  • Inner surface 31S faces radially inward.
  • Inner surface 31S includes the inner surface of tooth 10 .
  • the inner surface 31S faces the rotor 2 .
  • the inner surface 31S is parallel to the rotation axis AX.
  • the outer surface 31T faces radially outward.
  • the outer surface 31T includes the outer surface of the yoke 9.
  • the outer surface 31T is parallel to the rotation axis AX. In a plane perpendicular to the rotation axis AX, the outer surface 31T has a circular shape centered on the rotation axis AX.
  • the coil 32 is attached to the stator core 31 via an insulator (not shown).
  • a plurality of coils 32 are provided.
  • a plurality of coils 32 are formed separately.
  • the coil 32 is a so-called cassette coil.
  • One coil 32 is formed by spirally winding one conductor 14 .
  • a square wire, a rectangular wire, and a round wire are exemplified as the spirally wound conductor 14 .
  • one coil 32 may be formed by spirally connecting a plurality of conductors 14 .
  • the coil 32 is attached to the tooth 10. Slots 13 are provided between adjacent teeth 10 . A plurality of slots 13 are provided in the circumferential direction. In the embodiment, 24 slots 13 are provided. Slot 13 extends axially. One axial end of the slot 13 is connected to the end surface 31A. The other end of the slot 13 in the axial direction is connected to the end surface 31B. A portion of coil 32 is placed in slot 13 . A portion of the coil 32 axially protrudes from the stator core 31 .
  • One coil 32 is attached to one tooth 10 .
  • a portion of the first coil 32 and a portion of the second coil 32 adjacent in the circumferential direction are arranged in one slot 13 .
  • the winding method of the coil 32 is concentrated winding in which one coil 32 is attached to one tooth 10 .
  • the winding method of the coil 32 is double-layer winding in which part of the first coil 32 and part of the second coil 32 are arranged in one slot 13 .
  • the motor 1 is a three-phase motor.
  • Coil 32 includes a U-phase coil 32U, a V-phase coil 32V, and a W-phase coil 32W.
  • 12 coils 32 are provided.
  • U-phase coils 32U are provided.
  • V-phase coils 32V are provided.
  • W-phase coils 32W are provided.
  • One V-phase coil 32V is arranged next to one side of the U-phase coil 32U in the circumferential direction.
  • One W-phase coil 32W is arranged next to V-phase coil 32V on one side in the circumferential direction.
  • One U-phase coil 32U is arranged next to W-phase coil 32W on one side in the circumferential direction.
  • a pair of U-phase coils 32U are arranged to face each other in the radial direction.
  • a pair of V-phase coils 32V are arranged to face each other in the radial direction.
  • a pair of W-phase coils 32W are arranged to face each other in the radial direction.
  • a plurality of U-phase coils 32U are connected via connecting wires.
  • the plurality of V-phase coils 32V are connected via connecting wires.
  • the plurality of W-phase coils 32W are connected via connecting wires.
  • the crossover wire is connected to the terminal portion 17 .
  • FIG. 3 is a view of the coil 32 and the sheet 50 according to the embodiment viewed from the radial direction.
  • FIG. 4 is a view of the coil 32 and the sheet 50 according to the embodiment viewed from the circumferential direction.
  • the conductor 14 forming the coil 32 is assumed to be a rectangular wire.
  • the conductor forming the coil 32 may be a plate-shaped segment conductor.
  • the coil 32 may be formed by spirally connecting plate-shaped segment conductors.
  • the coil 32 has a coil body portion 15, coil end portions 16, and terminal portions 17.
  • the coil body portion 15 is arranged in the slot 13 .
  • the coil end portions 16 protrude from the stator core 31 in the axial direction.
  • the terminal portion 17 protrudes from the coil end portion 16 in the circumferential direction.
  • Coil body portion 15 includes a first coil body portion 151 and a second coil body portion 152 .
  • the second coil body portion 152 is arranged in the slot 13 next to the slot 13 in which the first coil body portion 151 is arranged.
  • the first coil body portion 151 of the first coil 32 and the second coil body portion 152 of the second coil 32 adjacent in the circumferential direction are arranged in one slot 13 .
  • Coil end portion 16 includes a first coil end portion 161 and a second coil end portion 162 .
  • the first coil end portion 161 protrudes from the end surface 31A of the stator core 31 to one side in the axial direction.
  • the second coil end portion 162 protrudes from the end face 31B of the stator core 31 to the other side in the axial direction.
  • a pair of terminal portions 17 are provided on the coil 32 .
  • the terminal portion 17 includes a first terminal portion 171 and a second terminal portion 172 .
  • the first terminal portion 171 includes an end portion of the conductor 14 on the winding start side.
  • the second terminal portion 172 includes an end portion of the conductor 14 on the winding end side.
  • the second terminal portion 172 may include the end portion of the conductor 14 on the winding start side, and the first terminal portion 171 may include the end portion of the conductor 14 on the winding end side.
  • the sheet 50 axially protrudes from the coil end portion 16 . As shown in FIGS. 3 and 4, the sheet 50 is supported by the first coil end portions 161 . The sheet 50 protrudes from the first coil end portion 161 to one side in the axial direction. Although not shown in FIGS. 3 and 4, the sheet 50 may be supported by the second coil end portions 162. As shown in FIG. The sheet 50 may protrude from the second coil end portion 162 to the other side in the axial direction.
  • the sheet 50 is electrically insulating.
  • An insulating paper is exemplified as the sheet 50 .
  • the sheet 50 may be made of synthetic resin.
  • the coil 32 has a plurality of conductors 14 arranged radially.
  • the plurality of conductors 14 are arranged so as to extend in the circumferential direction.
  • the multiple conductors 14 are arranged parallel to each other.
  • the seat 50 is supported by the coils 32.
  • the sheet 50 is sandwiched between a pair of radially adjacent conductors 14 at the coil end portions 16 .
  • a molding material is applied to the coil 32 while the sheet 50 is sandwiched between the pair of conductors 14 .
  • Varnish is exemplified as the molding material.
  • the sheet 50 and the conductor 14 are fixed by the molding material.
  • a plurality of sheets 50 are arranged in the radial direction.
  • a single sheet 50 is sandwiched between a pair of radially adjacent conductors 14 .
  • the sheets 50 are the first sheet 50 arranged on the innermost in the radial direction, the second sheet 50 arranged on the innermost side in the radial direction next to the first sheet 50, and the second sheet 50 arranged on the innermost side in the radial direction next to the second sheet 50.
  • a fourth sheet 50 arranged radially inward after the third sheet 50; and a fifth sheet arranged radially inward next to the fourth sheet 50.
  • a sixth sheet 50 arranged radially inward after the fifth sheet 50, a seventh sheet 50 arranged radially inward after the sixth sheet 50, and a and an eighth seat 50 positioned thereon.
  • the plurality of sheets 50 are arranged radially inside the center of the coil end portion 16, and some of the sheets 50 are arranged radially in the center of the coil end portion 16, Some of the sheets are arranged radially outside the center of the coil end portion 16 .
  • the plurality of sheets 50 are arranged at equal intervals in the radial direction between the radially inner portion and the radially outer portion of the coil end portion 16 .
  • the amount of protrusion of the sheet 50 from the coil end portion 16 is greater for the sheet 50 arranged radially outward. That is, the projection amount of the first sheet 50 is the smallest, the projection amount of the second sheet 50 is the second largest after the first sheet 50, and the projection amount of the third sheet 50 is the second largest after the second sheet 50, The projection amount of the fourth sheet 50 is large next to the third sheet 50, the projection amount of the fifth sheet 50 is large next to the fourth sheet 50, and the projection amount of the sixth sheet 50 is large next to the fifth sheet 50.
  • the seventh sheet 50 has a large amount of projection next to the sixth sheet 50, and the eighth sheet 50 has the largest amount of projection.
  • a sheet 50 is provided that axially protrudes from the end surface 34 of the coil end portion 16 . At least part of the cooling medium jetted from the supply port 25 hits the sheet 50 . The sheet 50 prevents the cooling medium jetted from the supply port 25 from passing through the end face 34 and moving radially outward. The cooling medium that hits the sheet 50 is supplied to the coil end portion 16 along the sheet 50 .
  • the amount of protrusion of the sheet 50 from the coil end portion 16 is greater for the sheet 50 arranged radially outward. Therefore, the cooling medium jetted from the supply port 25 can evenly hit each of the plurality of sheets 50 .
  • the cooling medium that hits the sheet 50 is supplied to the coil end portion 16 along the sheet 50 .
  • the coil end portions 16 are evenly cooled by the cooling medium.
  • the sheet 50 functions as a heat radiation fin for the coil 32.
  • the coil 32 and the sheet 50 are in contact.
  • the heat of coil 32 is dissipated through sheet 50 .
  • the heat of the coil 32 is efficiently dissipated by forming the sheet 50 from a highly thermally conductive material.
  • the conductor 14 of the coil 32 is covered with an insulating film, the heat of the coil 32 can be efficiently dissipated by forming the sheet 50 from a material having a thermal conductivity higher than that of the insulating film, for example.
  • FIG. 5 is a view of the coil 32 and the sheet 50 according to the embodiment viewed from the radial direction.
  • FIG. 6 is a view of the coil 32 and the sheet 50 according to the embodiment viewed from the circumferential direction.
  • a plurality of sheets 50 are arranged in the radial direction.
  • the plurality of sheets 50 are arranged outside the center of the coil end portion 16 in the radial direction.
  • the amount of protrusion of the sheet 50 from the coil end portion 16 is greater for the sheet 50 arranged radially outward.
  • the sheet 50 is not arranged inside the center of the coil end portion 16 in the radial direction.
  • the cooling medium jetted from the supply port 25 and hitting the sheet 50 travels along the sheet 50 to the radially outer portion of the coil end portion 16 . Supplied in parts. As a result, the radially outer portion of the coil end portion 16 is cooled by the cooling medium.
  • a plurality of sheets 50 may be arranged in the radial direction, and the plurality of sheets 50 may be arranged inside the center of the coil end portion 16 in the radial direction.
  • the amount of protrusion of the sheet 50 from the coil end portion 16 may be greater for the sheet 50 arranged radially outward.
  • FIG. 7 is a radial view of the coil 32 and the sheet 50 according to the embodiment.
  • FIG. 8 is a view of the coil 32 and the sheet 50 according to the embodiment viewed from the circumferential direction.
  • only one sheet 50 is arranged in the radial direction.
  • the sheet 50 is arranged substantially at the center of the coil end portion 16 in the radial direction.
  • the cooling medium jetted from the supply port 25 and hitting the sheet 50 travels along the sheet 50 and reaches the radially central portion of the coil end portion 16 . Supplied in parts. As a result, the radial center portion of the coil end portion 16 is cooled by the cooling medium.
  • FIG. 9 is a radial view of the coil 32 and the sheet 50 according to the embodiment.
  • FIG. 10 is a view of the coil 32 and the sheet 50 according to the embodiment viewed from the circumferential direction.
  • only one sheet 50 is arranged in the radial direction.
  • the sheet 50 is arranged radially outside the coil end portion 16 .
  • the cooling medium jetted from the supply port 25 and hitting the sheet 50 travels along the sheet 50 to the radially outer portion of the coil end portion 16 . Supplied in parts. As a result, the radially outer portion of the coil end portion 16 is cooled by the cooling medium.
  • FIG. 11 is a perspective view showing the stator 300 according to the embodiment.
  • a stator 300 according to the fifth embodiment is a stator having coils arranged around teeth at a two-slot pitch, as disclosed in Japanese Unexamined Patent Application Publication No. 2021-035310, for example.
  • Coil 32 includes a U-phase coil 32U, a V-phase coil 32V, and a W-phase coil 32W.
  • the three mounting teeth 11 are arranged adjacent to each other in the circumferential direction.
  • the three mounting teeth 11 include a first mounting tooth 111 , a second mounting tooth 112 and a third mounting tooth 113 .
  • the third mounting tooth 113 is arranged next to the second mounting tooth 112 on one side in the circumferential direction.
  • the second mounting tooth 112 is arranged next to the first mounting tooth 111 on one side in the circumferential direction.
  • three mounted teeth 11 and one non-mounted tooth 12 are arranged alternately in the circumferential direction.
  • the winding method of the coil 32 is distributed winding in which one coil 32 is attached to a plurality of attached teeth 11 .
  • one coil 32 is attached to two attachment teeth 11 . That is, the coils 32 are attached to the stator core 31 at a two-slot pitch.
  • the winding method of the coil 32 is single-layer winding in which one coil 32 is arranged in one slot 13 .
  • the non-mounted tooth 12 is arranged between two coils 32 adjacent in the circumferential direction.
  • the two coils 32 are mounted on the mounting tooth 11 in a state in which they are assembled.
  • the U-phase coil 32U and the V-phase coil 32V are mounted on the mounting teeth 11 in a state in which they are assembled.
  • the V-phase coil 32V and the W-phase coil 32W are mounted on the mounting teeth 11 in a state in which they are assembled.
  • the W-phase coil 32W and the U-phase coil 32U are mounted on the mounting teeth 11 in a state in which they are assembled.
  • a set of the U-phase coil 32U and the V-phase coil 32V will be referred to as a coil set 61 as appropriate.
  • a set of the V-phase coil 32V and the W-phase coil 32W is appropriately called a coil set 62 .
  • a set of the W-phase coil 32W and the U-phase coil 32U is appropriately referred to as a coil set 63 .
  • FIG. 12 is a perspective view showing the coil set 61 and sheet 50 according to the embodiment.
  • the coil 32 is composed of a plate-shaped conductor 19 .
  • Conductor 19 is a segment conductor.
  • a coil 32 is formed by spirally connecting a plurality of conductors 19 .
  • a portion of the conductor 19 of the V-phase coil 32V is arranged between the conductors 19 of the U-phase coil 32U.
  • a portion of the conductor 19 of the U-phase coil 32U and a portion of the conductor 19 of the V-phase coil 32V are alternately arranged in the radial direction.
  • a part of the conductor 19 of the V-phase coil 32V and a part of the conductor 19 of the W-phase coil 32W are arranged alternately in the radial direction to form a coil set of the V-phase coil 32V and the W-phase coil 32W.
  • 62 are formed.
  • a part of the conductor 19 of the W-phase coil 32W and a part of the conductor 19 of the U-phase coil 32U are arranged alternately in the radial direction to form a coil set 63 of the W-phase coil 32W and the U-phase coil 32U. be done.
  • Each of coil set 61 , coil set 62 , and coil set 63 is attached to stator core 31 .
  • U-phase coil 32U is attached to first attachment tooth 111 and second attachment tooth 112
  • V-phase coil 32V is attached to second attachment tooth 112 and third attachment tooth 113. is attached to the
  • the conductors 19 of the U-phase coil 32U and the conductors 19 of the V-phase coil 32V are arranged alternately in the radial direction in a portion of the circumference of the second mounting tooth 112 .
  • the V-phase coil 32V is attached to the first attached tooth 111 and the second attached tooth 112
  • the W-phase coil 32W is attached to the second attached tooth 112 and the third attached tooth 113.
  • the conductors 19 of the V-phase coil 32V and the conductors 19 of the W-phase coil 32W are arranged alternately in the radial direction in a part of the circumference of the second mounting tooth 112 .
  • the W-phase coil 32W is attached to the first attached tooth 111 and the second attached tooth 112
  • the U-phase coil 32U is attached to the second attached tooth 112 and the third attached tooth 113.
  • the conductors 19 of the W-phase coil 32W and the conductors 19 of the U-phase coil 32U are arranged alternately in the radial direction in part of the circumference of the second mounting tooth 112 .
  • the coil 32 has coil end portions 16 protruding from the stator core 31 in the axial direction.
  • a portion of the U-phase coil 32U and a portion of the V-phase coil 32V are arranged alternately in the radial direction.
  • Sheet 50 is sandwiched between a portion of conductor 19 of U-phase coil 32U and a portion of conductor 19 of V-phase coil 32V that are radially adjacent to each other.
  • the sheet 50 provides phase-to-phase insulation between the U-phase coil 32U and the V-phase coil 32V.
  • a plurality of sheets 50 are arranged in the radial direction. Of the plurality of sheets 50, some of the sheets 50 are arranged radially inside the center of the coil end portion 16, and some of the sheets 50 are arranged radially in the center of the coil end portion 16, Some of the sheets are arranged radially outside the center of the coil end portion 16 .
  • the plurality of sheets 50 are arranged at equal intervals in the radial direction between the radially inner portion and the radially outer portion of the coil end portion 16 .
  • the amount of protrusion of the sheet 50 from the coil end portion 16 is greater for the sheet 50 arranged radially outward.
  • the sheet 50 is also arranged in the coil set 62 and the coil set 63 . Since the sheets 50 arranged in the coil set 62 and the coil set 63 are the same as the sheets 50 arranged in the coil set 62, description thereof will be omitted.
  • the cooling medium jetted from the supply port 25 and hitting the sheet 50 is supplied to the coil end portion 16 along the sheet 50 .
  • the coil end portions 16 are evenly cooled by the cooling medium.
  • FIG. 13 is a perspective view showing the coil set 61 and sheet 50 according to the embodiment.
  • a plurality of sheets 50 are arranged in the radial direction. Of the plurality of sheets 50, some of the sheets 50 are arranged radially inside the center of the coil end portion 16, and some of the sheets 50 are arranged radially in the center of the coil end portion 16, Some of the sheets are arranged radially outside the center of the coil end portion 16 .
  • the plurality of sheets 50 are arranged at equal intervals in the radial direction between the radially inner portion and the radially outer portion of the coil end portion 16 . The amount of protrusion of the sheet 50 from the coil end portion 16 is greater for the sheet 50 located outside the center of the coil end portion 16 in the radial direction.
  • the cooling medium jetted from the supply port 25 and hitting the sheet 50 travels along the sheet 50 to the radially outer portion of the coil end portion 16 . Supplied in parts. As a result, the radially outer portion of the coil end portion 16 is cooled by the cooling medium.
  • FIG. 14 is a perspective view showing the coil set 61 and sheet 50 according to the embodiment.
  • a plurality of sheets 50 are arranged in the radial direction. Of the plurality of sheets 50, some of the sheets 50 are arranged radially inside the center of the coil end portion 16, and some of the sheets 50 are arranged radially in the center of the coil end portion 16, Some of the sheets are arranged radially outside the center of the coil end portion 16 .
  • the plurality of sheets 50 are arranged at equal intervals in the radial direction between the radially inner portion and the radially outer portion of the coil end portion 16 .
  • the amount of projection of the single sheet 50 arranged substantially at the center of the coil end portion 16 in the radial direction is larger than the amount of projection of the other sheets 50 .
  • the cooling medium jetted from the supply port 25 and hitting the sheet 50 travels along the sheet 50 and reaches the radially central portion of the coil end portion 16 . Supplied in parts. As a result, the radial center portion of the coil end portion 16 is cooled by the cooling medium.
  • FIG. 15 is a perspective view showing the coil set 61 and sheet 50 according to the embodiment.
  • a plurality of sheets 50 are arranged in the radial direction. Of the plurality of sheets 50, some of the sheets 50 are arranged radially inside the center of the coil end portion 16, and some of the sheets 50 are arranged radially in the center of the coil end portion 16, Some of the sheets are arranged radially outside the center of the coil end portion 16 .
  • the plurality of sheets 50 are arranged at equal intervals in the radial direction between the radially inner portion and the radially outer portion of the coil end portion 16 .
  • the amount of projection of the single sheet 50 arranged outside the coil end portion 16 in the radial direction is larger than the amount of projection of the other sheets 50 .
  • the cooling medium jetted from the supply port 25 and hitting the sheet 50 travels along the sheet 50 to the radially outer portion of the coil end portion 16 . Supplied in parts. As a result, the radially outer portion of the coil end portion 16 is cooled by the cooling medium.
  • FIG. 16 is a diagram showing a seat 50A according to the first example. As shown in FIG. 16, the outer shape of the sheet 50A is rectangular. The sheet 50A has a support portion 51A sandwiched between the pair of conductors 14 in the coil end portion 16 and a protruding portion 52A protruding from the coil end portion 16 in the axial direction.
  • FIG. 17 is a diagram showing a seat 50B according to the second example.
  • the sheet 50B includes a first support portion 51B sandwiched between the pair of conductors 14 in the coil end portion 16, a second support portion 53B sandwiched between the pair of conductors 14 in the coil body portion 15, and a coil and a projecting portion 52B projecting axially from the end portion 16 .
  • FIG. 18 is a diagram showing a seat 50C according to the third example.
  • FIG. 19 is a cross-sectional view showing the coil 32 on which the sheet 50C according to the third example is arranged.
  • a plurality of conductors 14 of the coil 32 are arranged in the radial direction.
  • the conductors 14 include a first conductor 14A that is arranged on the outermost radial direction, a second conductor 14B that is arranged on the outermost side in the radial direction after the first conductor 14A, and a second conductor 14B that is arranged on the outermost side in the radial direction after the second conductor 14B.
  • a ninth conductor 14I arranged on the most radially inner side.
  • the second conductor 14B is arranged radially inward of the first conductor 14A.
  • the third conductor 14C is arranged radially inward of the second conductor 14B.
  • the fourth conductor 14D is arranged radially inward of the third conductor 14C.
  • the fifth conductor 14E is arranged radially inward of the fourth conductor 14D.
  • the sixth conductor 14F is arranged radially inside the fifth conductor 14E.
  • the seventh conductor 14G is arranged radially inside the sixth conductor 14F.
  • the eighth conductor 14H is arranged radially inside the seventh conductor 14G.
  • the ninth conductor 14I is arranged radially inward of the eighth conductor 14H.
  • the sheet 50C includes a first support portion 51R sandwiched between the first conductor 14A and the second conductor 14B in the coil end portion 16, and the second conductor 14B and the second conductor 14B in the coil end portion 16.
  • the seat 50C includes a first projecting portion 52R projecting axially outward (one side in the axial direction in FIG. 19) of the coil end portion 16 from the first supporting portion 51R, and a coil end portion 16 extending from the second supporting portion 51F. and a second projecting portion 52F projecting axially outward (one side in the axial direction in FIG. 19).
  • One sheet 50C includes a first support portion 51R sandwiched between the third conductor 14C and the fourth conductor 14D in the coil end portion 16, and a first support portion 51R sandwiched between the fourth conductor 14D and the fifth conductor 14E in the coil end portion 16. 2 support portion 51F and a connecting portion 54C that connects the first support portion 51R and the second support portion 51F axially inwardly of the coil end portion 16 .
  • One sheet 50C includes a first support portion 51R sandwiched between the fifth conductor 14E and the sixth conductor 14F in the coil end portion 16, and a first support portion 51R sandwiched between the sixth conductor 14F and the seventh conductor 14G in the coil end portion 16.
  • One sheet 50C includes a first support portion 51R sandwiched between the seventh conductor 14G and the eighth conductor 14H in the coil end portion 16, and a first support portion 51R sandwiched between the eighth conductor 14H and the ninth conductor 14I in the coil end portion 16.
  • 2 support portion 51F and a connecting portion 54C that connects the first support portion 51R and the second support portion 51F axially inwardly of the coil end portion 16 .
  • the motor 1 is a switched reluctance motor.
  • the motor 1 may be a synchronous reluctance motor, a flux switching motor, a permanent magnet motor, or an induction motor. , an axial gap motor, or a linear actuator.
  • the motor 1 is a three-phase motor.
  • Motor 1 may be a four-phase motor.
  • the stator 3 is a double-layer winding motor in which two coils 32 are arranged in one slot 13.
  • the stator 3 may be a single-layer wound motor with one coil 32 arranged in one slot.
  • W phase coil 34... End face, 35... Inner face , 41... Bearing, 42... Seal member, 43... Supply passage, 44... Coolant supply part, 50... Seat, 50A... Seat, 50B... Seat, 50C... Seat, 51A... Support part, 52A... Protruding part, 51B... Third 1 support portion 52B...protrusion portion 53B...second support portion 51R...first support portion 51F...second support portion 52R...first protrusion portion 52F...second protrusion portion 54C...connecting portion 61 ...Coil set 62...Coil set 63...Coil set 111...First attachment tooth 112...Second attachment tooth 113...Third attachment tooth 151...First coil main body 152...Second coil main body , 161... First coil end portion, 162... Second coil end portion, 171... First terminal portion, 172... Second terminal portion, 300... Stator, AX... Rotation shaft.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

Un moteur comprend un rotor entraîné autour d'un axe de rotation, ainsi qu'un stator disposé autour du rotor. Le stator comprend : un noyau de stator ; une bobine qui est supportée par le stator et comprend une partie d'extrémité de bobine faisant saillie dans un sens axial à partir du noyau de stator ; et une feuille isolante qui est supportée par la bobine et fait saillie dans le sens axial à partir de la partie d'extrémité de bobine. Le rotor comporte une ouverture d'alimentation destinée à fournir un milieu de refroidissement à la partie d'extrémité de bobine.
PCT/JP2022/045127 2021-12-08 2022-12-07 Moteur WO2023106338A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-199486 2021-12-08
JP2021199486A JP2023085032A (ja) 2021-12-08 2021-12-08 モータ

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WO2023106338A1 true WO2023106338A1 (fr) 2023-06-15

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JP (1) JP2023085032A (fr)
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53152102U (fr) * 1978-03-29 1978-11-30
JP2014183602A (ja) * 2013-03-18 2014-09-29 Nissan Motor Co Ltd 回転電機
WO2017018067A1 (fr) * 2015-07-28 2017-02-02 日産自動車株式会社 Structure de refroidissement pour machine dynamoélectrique
WO2019008820A1 (fr) * 2017-07-05 2019-01-10 三菱電機株式会社 Machine électrique tournante
WO2021186914A1 (fr) * 2020-03-19 2021-09-23 株式会社小松製作所 Moteur et engin de chantier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53152102U (fr) * 1978-03-29 1978-11-30
JP2014183602A (ja) * 2013-03-18 2014-09-29 Nissan Motor Co Ltd 回転電機
WO2017018067A1 (fr) * 2015-07-28 2017-02-02 日産自動車株式会社 Structure de refroidissement pour machine dynamoélectrique
WO2019008820A1 (fr) * 2017-07-05 2019-01-10 三菱電機株式会社 Machine électrique tournante
WO2021186914A1 (fr) * 2020-03-19 2021-09-23 株式会社小松製作所 Moteur et engin de chantier

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