WO2023112396A1 - Stator et moteur - Google Patents

Stator et moteur Download PDF

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Publication number
WO2023112396A1
WO2023112396A1 PCT/JP2022/032417 JP2022032417W WO2023112396A1 WO 2023112396 A1 WO2023112396 A1 WO 2023112396A1 JP 2022032417 W JP2022032417 W JP 2022032417W WO 2023112396 A1 WO2023112396 A1 WO 2023112396A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
coil
coils
motor frame
heat radiating
Prior art date
Application number
PCT/JP2022/032417
Other languages
English (en)
Japanese (ja)
Inventor
哲郎 市川
Original Assignee
パナソニックＩｐマネジメント株式会社
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 パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2023112396A1 publication Critical patent/WO2023112396A1/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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • 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

Definitions

  • the present disclosure relates generally to stators and motors. More particularly, the present disclosure relates to stators with coils and motors with the stators.
  • the motor described in Patent Document 1 includes a stator having coils, a rotor, and an insulating resin layer provided on the surfaces of coil ends.
  • the motor described in Patent Document 1 includes a non-magnetic electrothermal member disposed in contact with the insulating resin layer and the inner wall surface of the motor housing to thermally connect the insulating resin layer and the inner wall surface of the motor housing. Prepare more.
  • Each of the plurality of coils further has a plate-shaped protrusion that protrudes from the end of the stopper toward the stator core along the extending direction of the axial center, and the protrusion extends in the winding direction.
  • WHEREIN It is preferable that it is arrange
  • the motor frame has a channel through which liquid passes, and the channel is formed inside the motor frame.
  • perpendicular as used in the present disclosure means not only a state in which the angle between the two is strictly 90 degrees, but also a state in which the two are substantially orthogonal within a certain margin of error. In other words, the angle between the two orthogonal angles is within a certain range of error (for example, 10 degrees or less) with respect to 90 degrees.
  • the stator 4 is arranged inside the motor frame 3 together with the rotor 2 in the radial direction D2 (see FIG. 2).
  • the “radial direction” in the present disclosure means the radial direction of a virtual circle C1 centered on the axis Ax1 as shown in FIG.
  • the “radial direction” is a direction orthogonal to the extending direction D1 of the axis Ax1.
  • the stator 4 includes a plurality of coils 5, a stator core 6, and a heat dissipation member 7.
  • each of the plurality of coils 5 may be referred to as "coil 5" when each of the plurality of coils 5 is not distinguished.
  • the heat dissipation member 7 is arranged so as to be sandwiched between the coil 5 and the motor frame 3 in the radial direction D2.
  • the heat dissipation member 7 is made of, for example, silicone-based resin.
  • the heat radiating member 7 has a lower hardness than the conducting wire (copper, for example) forming the coil 5 .
  • the heat generated by the coil 5 can be released to the motor frame 3 through the heat radiation member 7.
  • a conductive wire forming the contact portion 54 of the coil 5 is in surface contact with the heat radiating member 7 . Therefore, according to the stator of Embodiment 1, the heat dissipation performance can be improved, for example, compared to a stator in which the coil and the heat dissipation member are in point-like or line-like contact.
  • the motor 1 of Embodiment 1 is an inner rotor type motor.
  • a motor 1 includes a rotor 2 , a stator 4 and a motor frame 3 .
  • the rotor body 21 is arranged inside the rotor core 23 in the radial direction D2.
  • the rotor body 21 holds a rotating shaft 22 .
  • the rotor body 21 is made of iron, for example.
  • the rotor body 21 may be made of silicon steel, permalloy, ferrite, or the like.
  • the rotor core 23 is arranged outside the rotor body 21 in the radial direction D2.
  • the rotor core 23 is fixed to the rotor body 21 .
  • the rotor core 23 has a cylindrical shape centered on the axis Ax1.
  • the rotor core 23 is made of iron, for example.
  • the rotor core 23 may be made of silicon steel, permalloy, ferrite, or the like.
  • a plurality of coils 5 are arranged at regular intervals along the circumferential direction D3 of the virtual circle C1. Specifically, the plurality of coils 5 are formed by winding a plurality of corresponding teeth 62 on a one-to-one basis. As described above, the coil 5 is made of conductive wire such as copper.
  • FIG. 5 is a side view (plan view along the radial direction D2) with the heat radiating member 7 removed from the stator 4.
  • FIG. 5 a portion of the coil 5 that does not overlap the outer peripheral portion 61 of the stator core 6 in plan view along the radial direction D2 (winding direction D4) may be referred to as "coil end".
  • the coil 5 has two coil ends 501,502.
  • the winding portion 51 is formed by winding a flat conductor wire having a rectangular cross section around the tooth 62 by so-called edgewise winding so that it is laminated in the winding direction D4 (laminating direction).
  • the convex portion 541 has a first surface 5411 orthogonal to the winding direction D4 and a pair of second surfaces 5412 orthogonal to the stretching direction D1.
  • the first surface 5411 is in surface contact with the heat dissipation member 7 in the winding direction D4.
  • the pair of second surfaces 5412 are in surface contact with the heat radiating member 7 in the extending direction D1. That is, the contact area of the contact portion 54 with the heat dissipating member 7 can be increased by having the convex portion 541 . Therefore, heat dissipation performance can be improved.
  • the stopper portion 55 faces the heat radiating member 7 in the extending direction D1 of the axis Ax1. More specifically, the stopper portion 55 is in surface contact with the heat radiating member 7 in the extending direction D1. As shown in FIG. 6, the stopper portion 55 and the stator core 6 are arranged so as to sandwich at least a portion of the heat radiating member 7 in the extending direction D1.
  • the shape of the heat radiating member 7 is cylindrical centered on the axis Ax1.
  • the heat dissipation member 7 is arranged outside the plurality of coils 5 in the radial direction D2 (winding direction D4). More specifically, the heat dissipation member 7 is arranged outside the coil ends 501 (see FIG. 5) of the plurality of coils 5 in the radial direction D2.
  • the heat radiating member 7 is in surface contact with the contact portions 54 and stopper portions 55 of the plurality of coils 5 and the motor frame 3 .
  • the hardness of the heat radiating member 7 is 1.6 as a value according to JISK 6253 (type E).
  • the thermal conductivity of the heat radiating member 7 is 2.8 [W/m ⁇ K]].
  • the hardness of the heat radiating member 7 is preferably about 1 to 20 according to JISK 6253 (type E).
  • the hardness of the heat radiating member 7 is lower than that of the conducting wire forming the coil 5 (copper, for example).
  • the hardness of the heat radiating member 7 is lower than the hardness of the motor frame 3 and the hardness of the stator core 6 .
  • heat (copper loss) is generated in the coil 5 due to the current flowing through the coil 5 .
  • Heat generated in the coil 5 moves from the coil 5 to the stator core 6 .
  • Heat (iron loss) generated in the stator core 6 and heat transferred from the coil 5 transfer from the stator core 6 to the motor frame 3 .
  • the heat transferred to the motor frame 3 is transferred to the air A ⁇ b>1 contacting the motor frame 3 and the water W ⁇ b>1 passing through the flow path 32 of the motor frame 3 .
  • the contact portion 54 of the coil 5a (illustrated with dots in FIG. 9) includes a plurality of (two in the example of FIG. 9) convex portions 542 and a plurality of (three in the example of FIG. 9) convex portions 542. and a portion 543 .
  • each of the plurality of protrusions 542 may be referred to as a "protrusion 542" when the plurality of protrusions 542 are not distinguished from each other.
  • each of the plurality of protrusions 543 when each of the plurality of protrusions 543 is not distinguished, each of the plurality of protrusions 543 may be referred to as "the protrusion 543".
  • the contact portion 54 has the convex portion 542, there is an advantage that the contact area between the contact portion 54 and the heat dissipation member 7 can be increased, and the displacement of the heat dissipation member 7 along the extending direction D1 can be suppressed.
  • the convex portion 542 functions as a heat radiating portion and a stopper portion.
  • the plurality of convex portions 543 are arranged along a direction inclined by about 45° with respect to the stretching direction D1.
  • the convex portion 543 protrudes toward the heat radiating member 7 along the winding direction D4.
  • the heat radiation member 7 has a cubic shape. That is, since the contact portion 54 has the convex portion 543, the contact area between the contact portion 54 and the heat radiating member 7 can be increased, and the heat radiating member 7 can be prevented from shifting along the extending direction D1. There is an advantage. That is, the convex portion 543 functions as a heat radiating portion and a stopper portion.
  • the convex portion 543 has a surface that is in surface contact with the heat radiating member 7 in a direction orthogonal to the stretching direction D1 and the winding direction D4. Therefore, it is possible to suppress the displacement of the heat radiating member 7 along the direction perpendicular to the extending direction D1 and the winding direction D4.
  • the second lead-out portion 53 of the coil 5b extends from the first end 511 (one end) of the winding portion 51 along the extending direction D1. That is, the coil 5b does not have the stopper portion 55. As shown in FIG.
  • a motor frame 3a included in the motor 1a has a pair of bottom surface portions 33 that close a pair of openings of the main body portion 31.
  • the motor frame 3a accommodates the rotor 2 and the stator 4 in a space surrounded by the main body portion 31 and the pair of bottom surface portions 33. As shown in FIG.
  • the heat radiating member 7 is arranged so as to be sandwiched between the coil 5 and the motor frame 3a not only in the winding direction D4 but also in the extending direction D1.
  • the heat radiating member 7 is in surface contact with the coil 5 and the motor frame 3a also in the winding direction D4. Also in the extending direction D1, the contact area between the coil 5 and the heat dissipation member 7 can be increased by arranging the heat dissipation member 7 so as to be sandwiched between the coil 5 and the motor frame 3a.
  • the motor frame 3a may include a bracket or the like for supporting the bearing 34, for example.
  • the heat dissipation member 7 may be arranged so as to be sandwiched between the coil 5 and the bracket.
  • the heat dissipation member 7 may be made of fluorine-based resin.
  • the oil resistance of the heat radiating member 7 can be improved by forming the heat radiating member 7 with a fluororesin.
  • a coil 5c according to the second embodiment differs from the coil 5 according to the first embodiment in that it has a projecting portion 56. As shown in FIG.
  • FIG. 12 is a perspective view of the coil 5c according to Embodiment 2.
  • FIG. 12 the coil 5c of Embodiment 2 has a projecting portion 56. As shown in FIG. 12, the coil 5c of Embodiment 2 has a projecting portion 56. As shown in FIG. 12, the coil 5c of Embodiment 2 has a projecting portion 56. As shown in FIG. 12, the coil 5c of Embodiment 2 has a projecting portion 56.
  • the heat radiating member 7 is formed by pouring a material for the heat radiating member 7 between the coil 5c and the motor frame 3 and curing the material. Since the coil 5c has the protruding portion 56, the material poured between the coil 5c and the motor frame 3 is prevented from leaking from the gap Sp2 and the coil 5 and the heat radiating member 7 are not in surface contact. be able to.
  • Embodiment 2 is only one of various embodiments of the present disclosure. Embodiment 2 can be modified in various ways according to the design, etc., as long as the object of the present disclosure can be achieved.
  • the wound portion (51) is wound around the stator core (6) so that the rectangular conductor is laminated in the winding direction (D4) perpendicular to the extending direction (D1) of the axis (Ax1).
  • the heat radiating member (7) has a lower hardness than the rectangular conducting wire.
  • the heat dissipation member (7) is arranged so as to be sandwiched between each of the plurality of coils (5; 5a; 5b; 5c) and the motor frame (3; 3a) in the winding direction (D4).
  • Each of the plurality of coils (5; 5a; 5b; 5c) has a contact portion (54) that makes surface contact with the heat dissipation member (7).
  • the heat generated by the coils (5; 5a; 5b; 5c) can be released to the motor frame (3; 3a) through the heat radiation member (7).
  • the contact portion (54) of the coil (5; 5a; 5b; 5c) is in surface contact with the heat radiating member (7), for example, the coil (5; 5a; 5b; 5c) and the heat radiating member (7)
  • the heat dissipation performance can be improved compared to a conventional stator in which the contact is point-like or line-like.
  • the heat generated by the coils (5; 5a; 5b; 5c) can be released to the motor frame (3; 3a) through the heat radiation member (7).
  • the contact portion (54) of the coil (5; 5a; 5b; 5c) is in surface contact with the heat radiating member (7), for example, the coil (5; 5a; 5b; 5c) and the heat radiating member (7)
  • the heat dissipation performance can be improved compared to a conventional stator in which the contact is point-like or line-like.
  • the contact portion (54) has at least one of concave portions and convex portions (541).
  • the heat dissipation performance can be improved by increasing the contact area between the contact portion (54) and the heat dissipation member (7).
  • At least one of the concave portion or the convex portion (541) of the contact portion (54) dissipates heat in the extending direction (D1) of the axial center (Ax1). It has a surface (second surface 5412) that makes surface contact with the member (7).
  • the surface (second surface 5412) of the concave portion or convex portion (541) is in surface contact with the heat radiating member (7) in the stretching direction (D1). D1) can be prevented from falling off (shifting).
  • the stopper portion (55) has at least one of the concave portion and the convex portion (551).
  • heat dissipation performance can be improved by increasing the contact area between the stopper portion (55) and the heat dissipation member (7).
  • displacement of the heat radiating member (7) can be suppressed.
  • the stopper portion (55) has at least one of the concave portion and the convex portion (551) in the extending direction (D1) of the axis (Ax1) and the winding direction. It has a plurality along the direction orthogonal to the direction (D4).
  • each of the plurality of coils (5c) further has a plate-like protrusion (56) in any one of the fifth to seventh aspects.
  • the protruding portion (56) protrudes from the end portion of the stopper portion (55) toward the stator core (6) along the extending direction (D1) of the axis (Ax1).
  • the protrusion (56) is arranged between the contact portion (54) and the motor frame (3; 3a) in the winding direction (D4).
  • the heat radiating member (7) can be sandwiched between the contact portion (54) and the projecting portion (56) in the winding direction (D4), displacement of the heat radiating member (7) can be suppressed. can.
  • the motor frame (3; 3a) has a channel (32) through which the liquid (water W1) passes.
  • the flow path (32) is formed inside the motor frame (3; 3a).
  • the flow path (32) inside the motor frame (3; 3a) is connected to the flow path (32) outside the motor frame (3; 3a), for example, so that the motor frame (3; 3a) Since a heat dissipation path is formed between the inside and the outside of the motor frame (3; 3a), the heat dissipation performance can be improved.
  • the heat radiating member (7) when the heat radiating member (7) is made of silicone resin, there is an advantage that the cost of the heat radiating member (7) can be easily reduced. Moreover, when the heat radiating member (7) is made of a fluororesin, the oil resistance of the heat radiating member (7) can be improved.
  • a motor (1; 1a) according to a twelfth aspect includes a stator (4), a rotor (2), and a motor frame (3; 3a) according to any one of the first to eleventh aspects.
  • the stator (4) can release the heat generated by the coils (5; 5a; 5b; 5c) to the motor frame (3; 3a) through the heat radiation member (7).
  • the contact portion (54) of the coil (5; 5a; 5b; 5c) is in surface contact with the heat radiating member (7), for example, the coil (5; 5a; 5b; 5c) and the heat radiating member (7)
  • the heat dissipation performance can be improved compared to a conventional stator in which the contact is point-like or line-like.

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

Abstract

La présente invention concerne un stator qui est disposé à l'intérieur d'un cadre de moteur conjointement avec un rotor. Le rotor comprend un arbre rotatif tournant autour du centre d'arbre et s'étendant dans la direction d'extension du centre d'arbre. Le stator comprend un noyau de stator, une bobine et un élément de dissipation de chaleur. La bobine comprend une partie d'enroulement. La partie d'enroulement est enroulée autour du noyau de stator de telle sorte qu'un fil conducteur plat est stratifié dans une direction d'enroulement qui est orthogonale à la direction d'extension du centre d'arbre. L'élément de dissipation de chaleur possède une dureté inférieure à celle du fil conducteur formant la bobine. L'élément de dissipation de chaleur est disposé de façon à être pris en sandwich entre la bobine et le cadre de moteur dans la direction d'enroulement. La bobine comprend une partie de contact établissant un contact de surface avec l'élément de dissipation de chaleur.
PCT/JP2022/032417 2021-12-15 2022-08-29 Stator et moteur WO2023112396A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-203593 2021-12-15
JP2021203593 2021-12-15

Publications (1)

Publication Number Publication Date
WO2023112396A1 true WO2023112396A1 (fr) 2023-06-22

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ID=86774228

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PCT/JP2022/032417 WO2023112396A1 (fr) 2021-12-15 2022-08-29 Stator et moteur

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WO (1) WO2023112396A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005237176A (ja) * 2004-02-23 2005-09-02 Mitsubishi Motors Corp インホイールモータの冷却装置
JP2009261220A (ja) * 2008-03-19 2009-11-05 Toyota Motor Corp 固定子製造方法
WO2020017143A1 (fr) * 2018-07-18 2020-01-23 パナソニックＩｐマネジメント株式会社 Moteur
JP2020141551A (ja) * 2019-02-25 2020-09-03 株式会社デンソー 回転電機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005237176A (ja) * 2004-02-23 2005-09-02 Mitsubishi Motors Corp インホイールモータの冷却装置
JP2009261220A (ja) * 2008-03-19 2009-11-05 Toyota Motor Corp 固定子製造方法
WO2020017143A1 (fr) * 2018-07-18 2020-01-23 パナソニックＩｐマネジメント株式会社 Moteur
JP2020141551A (ja) * 2019-02-25 2020-09-03 株式会社デンソー 回転電機

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