WO2023167195A1 - Moteur, et véhicule électrique - Google Patents

Moteur, et véhicule électrique Download PDF

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Publication number
WO2023167195A1
WO2023167195A1 PCT/JP2023/007353 JP2023007353W WO2023167195A1 WO 2023167195 A1 WO2023167195 A1 WO 2023167195A1 JP 2023007353 W JP2023007353 W JP 2023007353W WO 2023167195 A1 WO2023167195 A1 WO 2023167195A1
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WO
WIPO (PCT)
Prior art keywords
heat radiating
coil head
axial
radiating member
heat
Prior art date
Application number
PCT/JP2023/007353
Other languages
English (en)
Japanese (ja)
Inventor
卓典 志直
順平 北村
Original Assignee
ニデック株式会社
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 ニデック株式会社 filed Critical ニデック株式会社
Publication of WO2023167195A1 publication Critical patent/WO2023167195A1/fr

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Classifications

    • 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
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • 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 invention relates to motors and electric vehicles.
  • a motor whose stator is molded with resin is known.
  • the stator of a molded motor is molded with molding resin. Mold resin is filled between the stator, the housing and the bracket.
  • the periphery of the coil head of the stator such as the axially outer side, the radially outer side, and the radially inner side, is covered with molding resin.
  • the heat generated in the coil portion is transferred from the coil head to the housing or bracket via the molded resin.
  • the molded motor requires a step of curing the molded resin after it is poured between the stator, the housing, and the bracket. This step requires a mold for molding the mold resin, a heat curing treatment of the resin, and the like. In order to improve the productivity of the motor, it is desirable to connect the coil portion and the housing with a simpler configuration.
  • An object of the present invention is to connect a coil portion and a housing so as to allow heat transfer with a simple configuration.
  • An exemplary motor of the present invention comprises a rotor, a stator and a housing.
  • the rotor is rotatable about an axially extending central axis.
  • the stator has a stator core.
  • the stator core radially faces the rotor.
  • the housing accommodates the rotor and the stator.
  • the stator further includes a coil portion and a heat dissipation portion.
  • the coil portion is arranged on the stator core.
  • the coil portion has a coil head on the axially outward side of the stator core.
  • the heat radiating portion is in contact with the coil head and the housing.
  • the heat radiation part has at least one of a first heat radiation member and a second heat radiation member.
  • the first heat radiating member is axially in contact with the coil head and the housing.
  • the second heat radiation member is in radial contact with the coil head and the housing.
  • a radially inner surface of the coil head is exposed inside the housing.
  • An exemplary electric vehicle of the present invention includes the motor described above.
  • the coil portion and the housing so as to allow heat transfer with a simple configuration.
  • FIG. 1 is a cross-sectional view showing a configuration example of a motor.
  • FIG. 2A is a perspective view of a coil section showing an example of arrangement of a heat radiating section.
  • FIG. 2B is a perspective view of the coil section showing another arrangement example of the heat radiating section.
  • FIG. 3 is a diagram showing a configuration example of an electric vehicle.
  • the direction parallel to the central axis CA is called “axial direction”.
  • the direction from the bracket 43 to the lid portion 42 which will be described later, is called “one axial direction Da1”, and the direction from the lid portion 42 to the bracket 43 is called “the other axial direction Da2”.
  • the direction orthogonal to the central axis CA is called “radial direction”
  • the direction of rotation about the central axis CA is called “circumferential direction”.
  • the direction toward the central axis CA is called “radially inward”
  • the direction away from the central axis CA is called “radial outward”.
  • the direction from the center to the end of the component is called the predetermined direction outward, and the direction from the end to the center of the component is called the predetermined direction inward.
  • the direction from the center to the axially outer end of the component is called “axially outward,” and the direction from the axially outer end to the center of the component is called “axially inward.” called "kata”.
  • annular means a shape that is continuously connected without breaks over the entire circumferential direction centered on the central axis CA, or a shape that is one Includes shapes with one or more cuts in the part. It also includes a shape that draws a closed curve on a curved surface that intersects the central axis CA with the central axis CA as the center.
  • parallel means not only a state in which they do not intersect at all no matter how far they are extended, but also a state in which they are substantially parallel. include. Also, “perpendicular” and “perpendicular” respectively include not only the state in which the two intersect each other at 90 degrees, but also the state in which they are substantially perpendicular and the state in which they are substantially orthogonal. That is, “parallel”, “perpendicular” and “perpendicular” each include a state in which the positional relationship between them has an angular deviation to the extent that it does not deviate from the gist of the present invention.
  • FIG. 1 is a cross-sectional view showing a configuration example of the motor 1. As shown in FIG. FIG. 1 shows a cross-sectional structure of the motor 1 cut along an imaginary plane including the central axis CA. In this embodiment, the motor 1 is a brushless motor that uses three-phase (U-phase, V-phase, and W-phase) AC currents as drive currents.
  • the motor 1 includes a rotor 2, a stator 3, a housing 4, and a substrate 5.
  • the rotor 2 is rotatable around an axially extending central axis CA.
  • the motor 1 has a rotor 2 .
  • the rotor 2 has a shaft 10 , a rotor core 21 , magnets 22 and balance weights 23 .
  • the shaft 10 has a cylindrical shape and extends axially along the central axis CA.
  • the rotor core 21 is fixed to the radial outer end of the shaft 10 and extends axially around the shaft 10 .
  • the rotor core 21 is formed using a magnetic material and functions as a yoke for the magnets 22 .
  • the rotor core 21 is a laminated body in which annular magnetic steel sheets that spread in the radial direction are laminated in the axial direction.
  • the magnet 22 is arranged at the radially outer end of the rotor core 21 .
  • magnetic poles N pole and S pole
  • the magnet 22 may be an annular member surrounding the central axis CA, or may include a plurality of magnet pieces arranged in the circumferential direction.
  • the balance weight 23 is a member for adjusting the rotational balance of the rotor 2.
  • a metal material, a resin material, a composite resin material containing ceramic powder such as alumina, or the like can be used.
  • the balance weight 23 is arranged on the axially outer end surface of the rotor core 21 .
  • the stator 3 has a stator core 31 , an insulator 32 , a coil portion 33 and a heat radiation portion 34 .
  • the motor 1 has a stator 3 .
  • the stator core 31 faces the rotor 2 in the radial direction.
  • the stator 3 is arranged radially outward of the rotor 2 and surrounds the rotor 2 .
  • the stator core 31 has a plurality of core pieces 310 arranged in the circumferential direction.
  • Each core piece 310 is formed using a magnetic material, and is a laminate in which magnetic steel sheets are laminated in the axial direction in this embodiment.
  • the core piece 310 has a core back portion 311 and teeth portions 312 .
  • the core-back portion 311 is fixed to the radial inner surface of the cylindrical portion 41 of the housing 4 , which will be described later.
  • the core pieces 310 are arranged in an annular shape surrounding the rotor 2 by connecting the circumferentially outer ends of the core back portions 311 adjacent in the circumferential direction.
  • the tooth portion 312 extends radially from the core back portion 311 toward the rotor 2, and extends radially inward in this embodiment.
  • a slot (not shown) in which a part of the coil portion 33 is accommodated is arranged between the tooth portions 312 adjacent in the circumferential direction.
  • the insulator 32 is made of an electrically insulating material such as resin, and arranged on the stator core 31 . Specifically, the insulator 32 is arranged on the tooth portion 312 to cover the surface of the portion of the tooth portion 312 where the coil portion 33 is arranged. For example, the insulator 32 is fitted in the core piece 310 and electrically insulates between the core piece 310 and the coil portion 33 . Note that the insulator 32 may be formed integrally with the core piece 310 by insert molding.
  • the coil portion 33 is arranged on the stator core 31 . Specifically, the coil portion 33 is arranged on the tooth portion 312 of each core piece 310 .
  • the coil portion 33 is plural and has coil portions of respective phases (U-phase, V-phase, W-phase) arranged in order in the circumferential direction.
  • each coil portion 33 is supplied with, for example, a three-phase AC drive current, the stator 3 is excited to drive the rotor 2 .
  • the coil part 33 has a conductor 331 and a coil head 332 .
  • the conductor 331 is arranged on the stator core 31 via the insulator 32 .
  • the insulator 32 is arranged on a side surface of the tooth portion 312 in a direction perpendicular to the radial direction.
  • a conducting wire 331 is arranged on the insulator 32 .
  • Conductive wire 331 is, for example, an enamel-coated copper wire, a metal wire covered with an insulating member, or the like.
  • the conductor 331 is distributed around the stator core 31 .
  • the coil portion 33 has the conductor 331 .
  • the same-phase coil portion is housed in a spaced slot across a plurality of slots in which the other two-phase coil portions are housed.
  • the distributed winding coil portion 33 is arranged in the stator core 31 by inserting a conducting wire 331 formed into a coil shape in advance into each slot of the stator core 31 .
  • the coil portion 33 in which the conductor wire 331 is distributedly wound forms the coil head 332 to be more rectangular when viewed from the radial direction than the concentrated winding coil portion 33 in which the conductor wire 331 is wound between adjacent slots in the circumferential direction.
  • the axial outer end surface and the radial outer surface of the coil head 332 can be made flatter. Therefore, the heat radiation part 34 arranged on the coil head 332 can be arranged more easily.
  • this illustration does not exclude a configuration in which the conducting wire 331 is not wound in a distributed manner.
  • the conductor 331 may be concentratedly wound around the stator core 31 .
  • the coil portion 33 further has a coil head 332 on the axially outward side of the stator core 31 .
  • the coil head 332 is a portion of the coil portion 33 that is axially outward of the stator core 31 .
  • the coil head 332 on the one axial direction Da1 side may be referred to as "coil head 3321”.
  • the coil head 332 on the other Da2 side in the axial direction may be referred to as a "coil head 3322".
  • the heat radiation part 34 is arranged between the coil head 332 and the housing 4 .
  • the heat radiating portion 34 contacts the coil head 332 and the housing 4 .
  • part of the heat radiating portion 34 is arranged between the one axial end face of the coil head 3321 on the one Da1 side in the axial direction and the later-described lid portion 42 of the housing 4, and is in contact with both.
  • Another part of the heat radiating portion 34 is arranged between the radially outer surface of the coil head 3321 and the later-described cylindrical portion 41 of the housing 4, and is in contact with both.
  • Another part of the heat radiating portion 34 is arranged between the other axial end face of the coil head 3322 on the other axial Da2 side and the later-described bracket 43 of the housing 4 and is in contact with both. Another part of the heat radiating portion 34 is arranged between the radially outer surface of the coil head 3322 and the tubular portion 41 of the housing 4 and is in contact with both. A radial inner surface of the coil head 332 is exposed inside the housing 4 . In other words, the heat radiating portion 34 is not arranged on the radial inner end face of the coil head 3321 on the one axial Da1 side and the radial inner end face of the coil head 3322 on the other axial Da2 side.
  • housing 4 accommodates the rotor 2 and the stator 3 .
  • motor 1 has housing 4 .
  • the housing 4 has a tubular portion 41 , a lid portion 42 , a bracket 43 , a first bearing holder 44 and a second bearing holder 45 .
  • the tubular portion 41 extends in the axial direction. As mentioned above, the housing 4 has the tubular portion 41 .
  • the tubular portion 41 is a tubular body surrounding the rotor 2 and the stator 3 and holds the stator 3 .
  • the stator core 31 is arranged on the radial inner surface of the tubular portion 41 .
  • the lid portion 42 extends radially inward from one axial end portion of the tubular portion 41 .
  • the housing 4 has the lid portion 42 .
  • the lid portion 42 is arranged on the one axial side Da ⁇ b>1 relative to the stator core 31 .
  • the lid portion 42 is integrated with the tubular portion 41 in this embodiment, it may be separate from the tubular portion 41 .
  • An opening 421 is arranged in the central portion of the lid portion 42 .
  • the shaft 10 is inserted through the opening 421 .
  • a portion of the shaft 10 on the one Da1 side in the axial direction protrudes outside the motor 1 through the opening 421 .
  • the bracket 43 is arranged on the other side Da2 in the axial direction from the stator core 31 and spreads in a direction intersecting with the axial direction.
  • the bracket 43 is attached to the other axial end of the tubular portion 41 and closes the other axial end of the tubular portion 41 .
  • the first bearing holder 44 extends axially from the lid portion 42 and surrounds the portion of the shaft 10 on the one Da1 side in the axial direction. In this embodiment, the first bearing holder 44 extends from the lid portion 42 in the other axial direction Da2. However, it is not limited to this example, and the first bearing holder 44 may extend from the lid portion 42 in the one axial direction Da1, or may extend from the lid portion 42 in the one axial direction Da1 and the other axial direction Da2.
  • the inside of the first bearing holder 44 communicates with the opening 421 .
  • a first bearing 441 is arranged inside the first bearing holder 44 . The first bearing holder 44 rotatably holds the shaft 10 via the first bearing 441 .
  • the second bearing holder 45 extends from the bracket 43 in the one axial direction Da1 and surrounds the portion of the shaft 10 on the other axial direction Da2 side.
  • a second bearing 451 is arranged inside the second bearing holder 45 .
  • the second bearing holder 45 rotatably holds the shaft 10 via a second bearing 451 .
  • the first bearing 441 and the second bearing 451 are ball bearings in this embodiment.
  • the present invention is not limited to this example, and at least one of the two may be a bearing other than a ball bearing, such as a sleeve bearing.
  • a lead wire 331 drawn out from the housing 4 is connected to the substrate 5 .
  • a drive circuit (not shown) for the stator 3 and the like are mounted on the substrate 5 .
  • FIG. 2A is a perspective view of the coil portion 33 showing an arrangement example of the heat radiating portion 34.
  • FIG. 2B is a perspective view of the coil portion 33 showing another arrangement example of the heat radiating portion 34. As shown in FIG.
  • the heat radiating section 34 has a first heat radiating member 341 and a second heat radiating member 342 .
  • the 1st heat radiating member 341 and the 2nd heat radiating member 342 may be generically called the "heat radiating member 340.”
  • the first heat radiation member 341 is in contact with the coil head 332 and the housing 4 in the axial direction. Specifically, the first heat radiation member 341 is in contact with the axial outer end surface of the coil head 332 . In other words, the first heat radiating member 341 is arranged on the axially outer end surface of the coil head 332 and is in contact with the axially other end surface of the lid portion 42 and the axially one end surface of the bracket 43 . Alternatively, the first heat radiating member 341 is arranged on the other axial end surface of the lid portion 42 and the one axial end surface of the bracket 43 and is in contact with the axial outer end surface of the coil head 332 . The first heat dissipation member 341 allows the coil head 332 to dissipate heat to the housing 4 in the axial direction.
  • the second heat radiation member 342 is in contact with the coil head 332 and the housing 4 in the radial direction. Specifically, the second heat dissipation member 342 contacts the radial outer surface of the coil head 332 . In other words, the second heat radiation member 342 is arranged on the radial outer surface of the coil head 332 and contacts the radial inner surface of the cylindrical portion 41 . Alternatively, the first heat radiation member 341 is arranged on the radially inner side surface of the cylindrical portion 41 and contacts the radially outer side surface of the coil head 332 . The second heat dissipation member 342 allows the coil head 332 to radially dissipate heat to the housing 4 .
  • the heat radiating section 34 has both the first heat radiating member 341 and the second heat radiating member 342 .
  • the present invention is not limited to this example, and either the first heat radiation member 341 or the second heat radiation member 342 may be omitted.
  • the heat radiating section 34 may have at least the first heat radiating member 341 .
  • the heat radiation part 34 may be configured to have at least the second heat radiation member 342 . That is, the heat radiating section 34 may have at least one of the heat radiating member 340 of the first heat radiating member 341 and the second heat radiating member 342 .
  • the stator 3 is inserted into the housing 4, thereby disposing the heat radiating member 340. It can be brought into contact with the housing 4 .
  • the stator 3 may be inserted into the housing 4 after disposing the heat radiating member 340 on the radially inner side surface of the cylindrical portion 41 of the housing 4 , the other axial end surface of the lid portion 42 , and the other axial side surface of the bracket 43 .
  • the heat radiating member 340 can be brought into contact with the housing 4 . Therefore, the coil portion 33 and the housing 4 can be connected in a heat transferable manner with a simple configuration.
  • heat can be radiated from the coil head 332 toward the housing 4 through the heat radiating portion 34 in at least one of the axial direction and the radial direction. Therefore, the heat dissipation of the stator 3 (particularly the coil portion 33) can be improved.
  • both the first heat dissipation member 341 and the second heat dissipation member 342 are annular.
  • the illustration of FIG. 2A does not exclude a configuration in which one of the first heat radiating member 341 and the second heat radiating member 342 is annular and the other is not.
  • at least one of the heat radiating members 340 described above may have an annular shape surrounding the central axis CA.
  • the circumferential length of at least one heat dissipating member 340 can be made longer, so that the contact area between the heat dissipating member 340 and the housing 4 can be made wider. Therefore, the heat radiation area from the coil head 332 to the housing 4 via at least one heat radiation member 340 can be increased. Therefore, the heat dissipation of the coil head 332 can be improved.
  • the first heat radiating member 341 has a plurality of heat radiating pieces 3410 arranged in the circumferential direction.
  • the second heat radiating member 342 has a plurality of heat radiating pieces 3420 arranged in the circumferential direction.
  • the illustration of FIG. 2B does not exclude the configuration in which the first heat dissipation member 341 has a plurality of heat dissipation pieces 3410 and the second heat dissipation member 342 does not have a plurality of heat dissipation pieces 3420 .
  • the configuration in which the first heat radiation member 341 does not have a plurality of heat radiation pieces 3410 and the second heat radiation member 342 has a plurality of heat radiation pieces 3420 is not excluded.
  • At least one of the first heat radiating member 341 and the second heat radiating member 342, the heat radiating member 340 may be plural and arranged in the circumferential direction.
  • the heat dissipating pieces 3410 and 3420 can be brought into contact with specific locations in the circumferential direction of the housing 4 . Therefore, the heat radiation path from the coil head 332 to the housing 4 can be set according to the arrangement of the heat radiation pieces 3410 and 3420 .
  • the circumferential size of each of the heat radiating pieces 3410 and 3420 can be made smaller, it becomes easier to arrange them on the coil head 332 .
  • FIGS. 2A and 2B can be arbitrarily combined as long as there is no particular contradiction.
  • At least one of the plurality of heat radiating members 340 is arranged at regular intervals in the circumferential direction.
  • at least one of the plurality of heat radiating pieces 3410 and the plurality of heat radiating pieces 3420 are arranged at regular intervals in the circumferential direction. In this way, heat can be radiated from the coil head 332 to the housing 4 with more uniform heat radiation efficiency in the circumferential direction.
  • the material of the first heat radiating member 341 and the second heat radiating member 342 may be any material that has a higher thermal conductivity than air, and for example, a material other than a heat insulating material can be used.
  • a material other than a heat insulating material can be used.
  • at least one of the first heat radiation member 341 and the second heat radiation member 342, ie, the heat radiation member 340, is made of a thermally conductive material with high thermal conductivity.
  • the heat dissipation member 340 has electrical insulation.
  • a material containing an organic compound such as silicone, urethane, or acrylic can be used. By doing so, it is possible to more reliably prevent a short circuit between the coil portion 33 and the housing 4 via at least one of the heat radiating members 340 described above.
  • this illustration does not exclude the configuration in which at least one of the heat radiating members 340 described above has low electrical insulation.
  • a short circuit between the coil portion 33 and the housing 4 can be suppressed by the insulating coating of the conductor 331 . Therefore, for at least one of the heat radiating members 340 described above, a material having electrical conductivity can be employed.
  • materials containing graphite, carbon fibers, etc. can be used.
  • the heat dissipation member 340 includes an elastic member.
  • the elastic member a material that is easily elastically deformed, such as rubber or elastic resin, can be used. In this way, even if there is a dimensional error between the coil head 332 and the housing 4 where at least one of the heat radiating members 340 is arranged, the dimensional error can be alleviated or eliminated by elastic deformation of the elastic member.
  • the elastic member described above has a sheet shape. In this way, the distance between the coil head 332 and the housing 4 in at least one of the axial and radial directions can be made narrower. Therefore, it is possible to suppress the size increase of the motor 1 in at least one direction described above.
  • the above example does not exclude a configuration in which the elastic member is not sheet-shaped and a configuration in which at least one of the heat radiating members 340 does not include an elastic member.
  • At least one of the first heat radiating member 341 and the second heat radiating member 342, the heat radiating member 340 contains heat radiating grease.
  • thermal grease for example, a material having high thermal conductivity is dispersed in highly viscous lubricating oil or the like.
  • at least one of the heat dissipation members 340 may include both the elastic member and the heat dissipation grease.
  • the elastic member may not be included while the heat dissipation grease is included.
  • at least one of the heat radiating members 340 may be filled with heat radiating grease. In this way, the coil portion 33 can radiate heat from the coil head 332 toward the housing 4 via the heat dissipation grease.
  • heat radiation grease can be used together with another heat radiation member (for example, the elastic member described above) to bring the other heat radiation member into closer contact with the housing 4 .
  • another heat radiation member for example, the elastic member described above
  • the gap between the contact portion between the other heat radiating member and the housing 4 can be filled with heat radiating grease. Therefore, the heat dissipation of the coil portion 33 can be improved.
  • this illustration does not exclude a configuration in which at least one of the heat radiation members 340 described above does not contain heat radiation grease.
  • At least one of the first heat dissipation member 341 and the second heat dissipation member 342, the heat dissipation member 340 may be a thermosetting resin.
  • an uncured thermosetting resin is placed on the axial outer end surface and radial outer surface of the coil head 332 or the inner surface of the housing 4 .
  • a concave portion filled with the uncured thermosetting resin may be arranged on the inner surface of the housing 4 .
  • the uncured thermosetting resin is brought into contact with the axial outer end surface and the radial outer surface of the coil head 332 and the housing 4 .
  • the thermosetting resin between the coil head 332 and the housing 4 becomes the heat radiating portion 34 .
  • First heat dissipation member 341 As described above, the first heat radiating member 341 is arranged on the axially outer end surface of the coil head 332 and connects the coil head 332 and the housing 4 in the axial direction so that heat can be transferred.
  • the first heat radiation member 341 on the one Da1 side in the axial direction which is arranged on the coil head 3321 on the one Da1 side in the axial direction, may be referred to as a "first heat radiation member 3411".
  • the first heat radiation member 3411 is arranged at one axial end of the coil head 3321 and contacts the other axial end surface of the lid portion 42 .
  • first heat radiation member 341 on the other Da2 side in the axial direction which is arranged on the coil head 3322 on the other Da2 side in the axial direction, may be referred to as a "first heat radiation member 3412".
  • the first heat radiation member 3412 is arranged at the other end in the axial direction of the coil head 3322 and contacts the one end face in the axial direction of the bracket 43 .
  • the radial width of the first heat radiating member 341 may be less than the radial width of the axial outer end face of the coil head 332 . In this way, the first heat radiating member 341 can be arranged compactly at the axially outer end of the coil head 332 .
  • the radial inner end of the first heat radiating member 3411 on the one axial Da1 side is positioned radially outward from the radial inner end of the one axial end face of the coil head 3321 on the one axial Da1 side.
  • the radial outer end portion of the first heat radiating member 3411 is positioned at the same position as the radial outer end portion of the one axial end surface of the coil head 3321 or the radial outer end portion of the one axial end surface of the coil head 3321. located radially inward of the
  • the radially inner end of the first heat radiating member 3411 is located at the same position as the radially inner end of the one axial end face of the coil head 3321 .
  • the radially outer end portion of the first heat radiating member 3411 is positioned radially inwardly of the radially outer end portion of the one axial end face of the coil head 3321 .
  • the radial inner end portion of the first heat radiating member 3412 on the other axial Da2 side is located radially outward from the radial inner end portion of the other axial end surface of the coil head 3322 on the other axial Da2 side. in position.
  • the radial outer end portion of the first heat radiating member 3412 is positioned at the same position as the radial outer end portion of the other axial end surface of the coil head 3322 or the radial outer end portion of the other axial end surface of the coil head 3322. located radially inward of the
  • the radially inner end of the first heat radiation member 3412 is located at the same position as the radially inner end of the other axial end surface of the coil head 3322 .
  • the radially outer end portion of the first heat radiating member 3412 is positioned radially inwardly of the radially outer end portion of the other axial end face of the coil head 3322 .
  • the radial width of the first heat radiation member 341 may be greater than or equal to the radial width of the axial outer end face of the coil head 332 .
  • the heat radiation cross-sectional area between the coil head 332 and the housing 4 via the first heat radiation member 341 can be increased.
  • the first heat radiating member 341 can sufficiently cover the axial outer end surface of the coil head 332 . Therefore, since the first heat radiating member 341 and the housing 4 can be connected so as to allow sufficient heat transfer, the heat radiating performance of the coil portion 33 can be improved.
  • the radially inner end of the first heat radiating member 3411 on the one axial Da1 side may be located at the same position as the radially inner end of the one axial end face of the coil head 3321 on the one axial Da1 side. , may be positioned radially inward of the radially inner end portion of the one axial end face of the coil head 3321 .
  • the radially outer end portion of the first heat radiating member 3411 may be positioned at the same position as the radially outer end portion of the one axial end surface of the coil head 3321 , or It may be positioned radially outward of the outer end.
  • the radial inner end portion of the first heat radiating member 3412 on the other axial Da2 side is at the same position as the radial inner end portion of the other axial end surface of the coil head 3322 on the other axial Da2 side, Alternatively, it may be positioned radially inward of the radially inner end portion of the other axial end face of the coil head 3322 .
  • the radially outer end portion of the first heat radiating member 3412 may be located at the same position as the radially outer end portion of the other axial end surface of the coil head 3322 , or It may be positioned radially outward of the outer end.
  • first heat radiation member 341 is arranged on both the coil heads 3321 and 3322 in this embodiment. However, it is not limited to this illustration, and the first heat radiation member 341 may be arranged only on either one of the coil heads 3321 and 3322 .
  • the first heat radiation member 341 is arranged at least between the coil head 3321 on the one Da1 side in the axial direction of the stator core 31 and the lid portion 42 .
  • the coil head 332 is provided with at least the first heat radiation member 3411 on the one Da1 side in the axial direction.
  • the stator 3 is inserted from the axial direction other Da ⁇ b>2 side of the cylindrical portion 41 and abutted against the lid portion 42 .
  • the first heat radiating member 3411 arranged at one end in the axial direction of the coil head 3321 can be brought into contact with the lid portion 42 . That is, the first heat radiation member 3411 can be brought into contact with both the coil head 3321 and the lid portion 42 with a simple configuration.
  • the positioning of the stator 3 in the axial direction can be facilitated.
  • Second heat dissipation member 342 As described above, the second heat dissipating member 342 is arranged on the radially outer surface of the coil head 332 and connects the coil head 332 and the housing 4 in the radial direction so that heat can be transferred.
  • the second heat radiating member 342 on the one Da1 side in the axial direction which is arranged on the coil head 3321 on the one Da1 side in the axial direction, may be referred to as "second heat radiating member 3421".
  • the second heat radiating member 3421 is arranged on the radially outer surface of the coil head 3321 and contacts the radially inner surface of the cylindrical portion 41 .
  • the second heat radiating member 342 on the other Da2 side in the axial direction which is arranged on the coil head 3322 on the other Da2 side in the axial direction, may be referred to as "second heat radiating member 3422".
  • the second heat radiating member 3422 is arranged on the radially outer surface of the coil head 3322 and contacts the radially inner surface of the cylindrical portion 41 .
  • the axial width of the second heat radiating member 342 may be less than the axial width of the radial outer surface of the coil head 332 . In this way, the second heat radiating member 342 can be arranged compactly at the axially outer end of the coil head 332 .
  • the one axial end of the second heat dissipating member 3421 on the one axial Da1 side is positioned at the other axial Da2 from the one axial end of the radial outer surface of the coil head 3321 on the one axial Da1 side.
  • the other axial end of the second heat radiating member 3421 is located at the same position as the other axial end of the radial outer surface of the coil head 3321 or the other axial end of the radial outer surface of the coil head 3321. It is located at one side Da1 in the axial direction.
  • the one axial end of the second heat radiating member 3421 is located at the same position as the one axial end of the radial outer surface of the coil head 3321 .
  • the other axial end portion of the second heat radiating member 3421 is located at a position one Da1 in the axial direction from the other axial end portion of the radial outer surface of the coil head 3321 .
  • the other axial end of the second heat dissipating member 3422 on the other axial Da2 side is located further along the one axial Da1 than the other axial end of the radial outer surface of the coil head 3322 on the other axial Da2 side. in position.
  • the one axial end of the second heat radiating member 3422 is located at the same position as the one axial end of the radial outer surface of the coil head 3322, or the one axial end of the radial outer surface of the coil head 3322. is located at a position Da2 on the other side in the axial direction.
  • the other axial end of the second heat radiating member 3422 is located at the same position as the other axial end of the radial outer surface of the coil head 3322 .
  • the one axial end portion of the second heat radiating member 3422 is positioned at the other axial direction Da2 from the one axial end portion of the radial outer surface of the coil head 3322 .
  • the axial width of the second heat radiating member 342 may be greater than or equal to the axial width of the radial outer surface of the coil head 332 .
  • the heat radiation cross-sectional area between the coil head 332 and the housing 4 via the second heat radiation member 342 can be increased.
  • the second heat radiating member 342 can sufficiently cover the radial outer surface of the coil head 332 . Therefore, since the second heat radiating member 342 and the housing 4 can be connected so as to allow sufficient heat transfer, the heat radiating performance of the coil portion 33 can be improved.
  • the one axial end of the second heat radiating member 3421 on the one axial Da1 side may be located at the same position as the one axial end of the radial outer surface of the coil head 3321 on the one axial Da1 side. , may be at a position one axial Da1 from the one axial end of the radial outer surface of the coil head 3321 .
  • the other axial end of the second heat radiating member 3421 may be located at the same position as the other axial end of the radial outer surface of the coil head 3321, or It may be positioned on the other side Da2 in the axial direction from the other end.
  • the coil head 3322 may be located on the other axial side Da ⁇ b>2 relative to the other axial end of the radial outer surface of the coil head 3322 .
  • the one axial end of the second heat radiating member 3422 may be located at the same position as the one axial end of the radial outer surface of the coil head 3322 , or the radial outer surface of the coil head 3322 may It may be positioned on the one side Da1 in the axial direction from the one end in the direction.
  • the second heat radiation member 342 is arranged on both the coil heads 3321 and 3322 in this embodiment. However, it is not limited to this illustration, and the second heat dissipation member 342 may be arranged only on either one of the coil heads 3321 and 3322 .
  • the second heat radiating member 342 is arranged at least between the coil head 3322 on the other Da2 side in the axial direction of the stator core 31 and the cylindrical portion 41 .
  • the coil head 332 is provided with at least the second heat radiation member 3422 on the other Da2 side in the axial direction.
  • the sliding distance of the second heat radiating member 3422 with respect to the radial inner surface of the cylindrical portion 41 can be shortened. Therefore, it is possible to reduce the possibility of misalignment of the second heat radiating member 3422 caused by sliding, such as displacement or curling up.
  • the second heat radiating member 3422 on the other Da2 side in the axial direction is arranged at a position closer to the other end in the axial direction of the open cylindrical portion 41 , when the stator 3 is inserted into the cylindrical portion 41 , the second heat radiating member 3422 can be easily confirmed visually.
  • FIG. 3 is a schematic diagram of an electric vehicle 100 on which the motor 1 is mounted.
  • the electric vehicle 100 in FIG. 3 is a motorcycle.
  • the exemplification of the present embodiment does not exclude a configuration in which the motor 1 is mounted on an electric vehicle 100 other than a motorcycle.
  • the electric vehicle 100 includes a motor 1 as shown in FIG.
  • the coil portion 33 and the housing 4 can be heat-transferably connected with a simple configuration. Therefore, the heat dissipation of the stator 3 (particularly the coil portion 33) of the motor 1 can be improved.
  • the electric vehicle 100 further includes a vehicle body 101, a battery 102, and wheels 103.
  • the vehicle body 101 includes a steering wheel 1011 and a seat 1012 on which a passenger sits.
  • the battery 102 is attached to the vehicle body 101.
  • Battery 102 is a chargeable/dischargeable power supply device such as a lithium ion battery, and supplies electric power to components of electric vehicle 100 such as motor 1 .
  • the wheels 103 have front wheels 103f and rear wheels 103r.
  • the front wheels 103 f are attached to the front portion of the vehicle body 101
  • the rear wheels 103 r are attached to the rear portion of the vehicle body 101 .
  • Torque of the motor 1 is transmitted to the rear wheel 103r via a power transmission mechanism (not shown).
  • the electric vehicle 100 can run by rotating the rear wheel 103r according to this torque.
  • the motor 1 is mounted on the electric vehicle 100 .
  • the motor 1 may be provided in a device other than the electric vehicle 100 .
  • the present invention is useful, for example, for devices having a coil portion that generates heat in response to power supply.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

Dans la présente invention, un stator d'un moteur comprend une partie de dissipation de chaleur. La partie de dissipation de chaleur est en contact avec une tête de bobine du stator, et un logement qui abrite un rotor et le stator. La partie de dissipation de chaleur comprend au moins un élément de dissipation de chaleur parmi un premier élément de dissipation de chaleur et un second élément de dissipation de chaleur. Le premier élément de dissipation de chaleur est en contact axial avec la tête de bobine et le logement. Le second élément de dissipation de chaleur est en contact radial avec la tête de bobine et le logement. La surface radialement intérieure de la tête de bobine est exposée à l'intérieur du logement.
PCT/JP2023/007353 2022-03-02 2023-02-28 Moteur, et véhicule électrique WO2023167195A1 (fr)

Applications Claiming Priority (2)

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JP2022-032013 2022-03-02
JP2022032013 2022-03-02

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WO2023167195A1 true WO2023167195A1 (fr) 2023-09-07

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000116063A (ja) * 1998-10-05 2000-04-21 Matsushita Electric Ind Co Ltd モータ
JP2012170299A (ja) * 2011-02-16 2012-09-06 Toyota Motor Corp モータの冷却装置
CN204858875U (zh) * 2015-06-30 2015-12-09 比亚迪股份有限公司 一种电机
JP2016119764A (ja) * 2014-12-19 2016-06-30 トヨタ自動車株式会社 回転電機
JP2017011885A (ja) * 2015-06-23 2017-01-12 マツダ株式会社 電動モータの冷却構造
JP2017036026A (ja) * 2015-08-07 2017-02-16 株式会社デンソー 車両の駆動装置
JP2020014283A (ja) * 2018-07-13 2020-01-23 本田技研工業株式会社 回転電機のステータ構造及びこれを備えた車両
CN210927225U (zh) * 2019-12-26 2020-07-03 雷勃电气（苏州）有限公司 一种散热效果优异的电机定子
CN212572230U (zh) * 2020-07-30 2021-02-19 南京迪瓦永磁科技有限公司 一种永磁电机线圈端部单面浇注散热结构
CN112865395A (zh) * 2021-03-03 2021-05-28 江苏华永复合材料有限公司 用于高功率密度汽车电机的冷却系统

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000116063A (ja) * 1998-10-05 2000-04-21 Matsushita Electric Ind Co Ltd モータ
JP2012170299A (ja) * 2011-02-16 2012-09-06 Toyota Motor Corp モータの冷却装置
JP2016119764A (ja) * 2014-12-19 2016-06-30 トヨタ自動車株式会社 回転電機
JP2017011885A (ja) * 2015-06-23 2017-01-12 マツダ株式会社 電動モータの冷却構造
CN204858875U (zh) * 2015-06-30 2015-12-09 比亚迪股份有限公司 一种电机
JP2017036026A (ja) * 2015-08-07 2017-02-16 株式会社デンソー 車両の駆動装置
JP2020014283A (ja) * 2018-07-13 2020-01-23 本田技研工業株式会社 回転電機のステータ構造及びこれを備えた車両
CN210927225U (zh) * 2019-12-26 2020-07-03 雷勃电气（苏州）有限公司 一种散热效果优异的电机定子
CN212572230U (zh) * 2020-07-30 2021-02-19 南京迪瓦永磁科技有限公司 一种永磁电机线圈端部单面浇注散热结构
CN112865395A (zh) * 2021-03-03 2021-05-28 江苏华永复合材料有限公司 用于高功率密度汽车电机的冷却系统

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