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WO2024255881A1 - Douille isolante, moteur en épingle à cheveux et véhicule - Google Patents

Douille isolante, moteur en épingle à cheveux et véhicule Download PDF

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Publication number
WO2024255881A1
WO2024255881A1 PCT/CN2024/099386 CN2024099386W WO2024255881A1 WO 2024255881 A1 WO2024255881 A1 WO 2024255881A1 CN 2024099386 W CN2024099386 W CN 2024099386W WO 2024255881 A1 WO2024255881 A1 WO 2024255881A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
insulating bushing
support members
stator winding
groove
Prior art date
Application number
PCT/CN2024/099386
Other languages
English (en)
Chinese (zh)
Inventor
谢鹏涛
曾军
夏冰冰
谢希
Original Assignee
上海理想汽车科技有限公司
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
Priority claimed from CN202321562376.2U external-priority patent/CN220527756U/zh
Priority claimed from CN202321555757.8U external-priority patent/CN220022445U/zh
Application filed by 上海理想汽车科技有限公司 filed Critical 上海理想汽车科技有限公司
Publication of WO2024255881A1 publication Critical patent/WO2024255881A1/fr

Links

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
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation

Definitions

  • the present application relates to the technical field of flat wire motors, and in particular to an insulating bushing, a flat wire motor and a vehicle.
  • the insulating bushing of the flat wire motor is fitted in the stator slot of the stator core, and the stator winding is fitted in the insulating bushing.
  • the insulating bushing plays the role of separating the stator core from the stator winding, but at the same time, the insulating bushing also basically completely eliminates the gap between the stator winding and the stator slot to ensure the reliable fixation of the stator winding in the stator slot.
  • the motor stator can usually only spray the cooling oil on the end winding, and/or, open oil holes on the stator core, and let the cooling oil flow in the channel formed by the oil holes of the core to take away the heat, and flow to the end to spray out to complete the cooling of the stator winding.
  • the highest temperature of the motor stator occurs at the winding (copper wire) in the stator slot, and the above cooling method still has the defect of poor cooling effect on the winding in the stator slot.
  • the stator slots of the stator core are usually equipped with insulating bushings, and the stator windings are fitted in the insulating bushings to achieve the installation of the stator windings on the stator core.
  • the insulating bushings are separated by the stator windings and the stator core to achieve the insulation connection between the two.
  • the stator windings and the insulating bushings are often provided with a gap transition fit, and/or a gap or transition fit between the insulating bushings and the stator sleeves.
  • the present application aims to solve one of the technical problems in the related art at least to some extent.
  • some embodiments of the present application provide an insulating bushing, which has the advantage of being easy to form a cooling channel that is in direct contact with the stator winding and has a good cooling effect on the stator winding.
  • Some embodiments of the present application also provide a flat wire motor.
  • the insulating bushing includes a main body and a support member, the cross-sectional outer contour of the main body matches the cross-sectional outer contour of the stator slot of the stator core, and the main body has a receiving cavity for the stator winding; there are multiple support members and they are arranged on the inner circumferential surface of the main body, the stator winding abuts against the support members so as to be separated from the main body, the main body and at least two support members surround to form a cooling flow channel groove, the inlet and outlet of the cooling flow channel groove are respectively located at the two end openings of the receiving cavity, and a cooling channel is formed between each cooling flow channel groove and the stator winding.
  • a cooling channel for the coolant to pass through can be formed between the cooling channel groove and the stator winding.
  • the coolant in the cooling channel can directly contact the stator winding to achieve direct cooling of the stator winding, and the cooling effect of the stator winding is better.
  • the support member extends along the axial direction of the accommodating cavity, and a plurality of support members are arranged at intervals along the circumference of the body, and the body and any two adjacent support members surround and form a cooling channel groove.
  • the maximum dimension of any support member along the circumference of the body is less than or equal to the width of any cooling channel groove.
  • At least a portion of the support member has a circumferential dimension that gradually decreases toward the stator winding.
  • the multiple support members include first support members arranged at intervals along a first direction and multiple second support members arranged at intervals along the first direction, the first support members and the second support members are arranged on both sides of the stator winding, and each flat copper wire in the stator winding is abutted against at least one first support member and at least one second support member.
  • the plurality of support members further include a third support member, the plurality of first support members, the third support members and the plurality of second support members are arranged along the circumference of the body, and the flat copper wire at the edge of the stator winding abuts against the third support segment.
  • the body is a cylindrical structure connected end to end along its circumference.
  • the body and the support are integrally formed.
  • the flat wire motor according to some embodiments of the present application includes an insulating bushing as described in some embodiments above.
  • the vehicle according to some embodiments of the present application includes the flat wire motor as described in some embodiments above.
  • Some embodiments of the present application provide an insulating bushing having the advantages of stable and reliable connection with the stator winding and the stator core, good NVH characteristics of the flat wire motor and good stator stiffness.
  • Some embodiments of the present application also provide a flat wire motor.
  • the insulating bushing includes a main body and a support member, the cross-sectional outer contour of the main body matches the cross-sectional outer contour of the stator slot of the stator core, the main body has a receiving cavity for the stator winding, a thinning groove is provided on the wall of the main body, and the breaking strength of the part of the main body constituting the bottom surface of the thinning groove is lower than the strength required for the stator winding to fit in the receiving cavity.
  • a thinning groove is provided on the wall of the body, and it is ensured that the breaking strength of the portion of the body constituting the bottom surface of the thinning groove is lower than the strength required for the stator winding to fit in the accommodating cavity. At this time, when the stator winding is inserted into the accommodating cavity to compress the body, the body breaks at the thinning groove to facilitate the smooth insertion of the stator winding into the accommodating cavity.
  • the body is stretched open with the local fracture, and can be more closely pressed against the wall of the stator slot of the stator core, thereby effectively ensuring the effective contact between the insulating bushing and the stator core and the stator winding, and further effectively ensuring the stiffness of the stator and the NVH characteristics of the flat wire motor.
  • the thinning groove extends along the axial direction of the accommodating cavity.
  • the body includes a first wall, a second wall, a third wall and a fourth wall connected end to end along the circumference of the accommodating cavity, the first wall and the third wall are arranged at intervals along the circumference of the stator core, the second wall and the fourth wall are arranged at intervals radially outward of the stator core, and each of the first wall, the third wall and the fourth wall is provided with at least one thinning groove.
  • each of the first wall, the third wall and the fourth wall is provided with a thinning groove, the thinning groove on the first wall is adjacent to the second wall, the thinning groove on the third wall is adjacent to the fourth wall, and the thinning groove on the fourth wall is located in the middle of the fourth wall.
  • each thinning groove includes a plurality of sub-grooves, and the plurality of sub-grooves are spaced apart from each other along the axial direction of the accommodating cavity.
  • the sub-grooves are through-grooves that penetrate the wall of the body, or the sub-grooves are disposed on the inner circumference or outer circumference of the body.
  • the width of the thinning groove gradually decreases toward the bottom surface of the thinning groove.
  • the insulating bushing also includes a support member, which is provided in plurality on the inner circumferential surface of the main body, the stator winding abuts against the support member so as to be separated from the main body, the main body and at least two support members surround and form a cooling channel groove, and the thinning groove is provided on the bottom surface of the cooling channel groove.
  • the support member extends along the axial direction of the accommodating cavity, and a plurality of support members are arranged at intervals along the circumference of the body, and the body and any two adjacent support members surround and form a cooling channel groove.
  • the flat wire motor according to some embodiments of the present application includes an insulating bushing as described in some embodiments above.
  • the vehicle according to some embodiments of the present application includes the flat wire motor as described in some embodiments above.
  • FIG. 4 is a partial enlarged view of FIG. 3 .
  • FIG. 5 is a cross-sectional view of a flat wire motor at an insulating bushing according to some embodiments of the present application.
  • FIG. 6 is a schematic diagram of an insulating bushing combined with a stator winding according to some embodiments of the present application.
  • FIG. 7 is a cross-sectional view of an insulating bushing combined with a stator winding according to some embodiments of the present application.
  • FIG. 8 is a schematic diagram of an insulating bushing before being matched with a stator winding according to some embodiments of the present application.
  • FIG. 9 is a cross-sectional view of an insulating bushing before being matched with a stator winding according to some embodiments of the present application.
  • Insulating bushing 1. Main body; 11. Cooling channel groove; 12. Thinning groove; 121. Sub-groove; 13. First wall; 14. Second wall; 15. Third wall; 16. Fourth wall; 2. Support member; 21. First support member; 22. Second support member; 23. Third support member; 3. Stator winding; 31. Flat copper wire.
  • the total cross-sectional area of the cooling channel groove 11 formed in the accommodating cavity can be designed to be larger, so that the contact area between the coolant inside the cooling channel and the stator winding 3 is larger, thereby achieving a better cooling effect on the stator winding 3.
  • a plurality of support members 2 are arranged at equal intervals along the circumference of the body 1.
  • the maximum dimension of the support member 2 in the circumference of the body 1 can be much smaller than the width of the cooling channel groove 11, as long as the support member 2 can support the stator core and separate the stator core from the body 1.
  • the maximum dimension of the support member 2 in the circumference of the body 1 can also be substantially equal to the width of the cooling channel.
  • the size of at least a portion of the support member 2 along the circumferential direction of the body 1 gradually decreases toward the direction approaching the stator winding 3 .
  • the third support member 23 is provided to form more cooling channels between the flat copper wire 31 at the edge and the body 1 , thereby increasing the contact area between the coolant in the cooling channel and the flat copper wire 31 at the edge, thus providing a better cooling effect on the flat copper wire 31 .
  • the body 1 When the stator winding 3 is fitted in the receiving cavity of the body 1 and presses the support 2, the body 1 will basically break along the extension direction of the thinning groove 12 to achieve the effect of expanding the thinning groove 12 and increasing the volume of the receiving cavity. Moreover, under the guidance of the thinning groove 12, the breaking position of the body 1 is more accurate, and the breaking is more convenient and labor-saving.
  • the main body 1 can open at least two thinning slots 12 to more evenly expand the volume of the accommodating cavity, which not only facilitates the fitting of the stator winding 3, but also facilitates the stator winding 3 to fit more closely with the wall of the stator slot, further ensuring effective contact between the insulating bushing 100 and the stator winding 3 and the stator core.
  • FIG. 7 and FIG. 9 there are three thinning grooves 12 , and the three thinning grooves 12 are arranged at equal intervals along the circumferential direction of the body 1 .
  • the second wall 14 of the body 1 is bent in a direction away from the fourth wall 16 , and when the stator winding 3 is inserted into the accommodating cavity, the second wall 14 can be stretched under tension to achieve smooth fitting of the stator winding 3 in the accommodating cavity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

La présente demande divulgue une douille isolante, un moteur en épingle à cheveux et un véhicule. La douille isolante comprend un corps et des éléments de support ; le contour externe de la section transversale du corps est adapté au contour externe de la section transversale d'une fente de stator d'un noyau de stator ; le corps est pourvu d'une cavité de réception permettant l'ajustement d'enroulements de stator; des rainures d'amincissement sont formées dans la paroi du corps ; la résistance à la rupture de la partie, formant les surfaces inférieures des rainures d'amincissement, dans le corps est inférieure à la résistance requise par l'ajustement des enroulements de stator dans la cavité de réception ; il y a plusieurs éléments de support, et les éléments de support sont disposés sur la surface périphérique interne du corps; les enroulements de stator viennent en butée contre les éléments de support de façon à être séparés du corps ; le corps et au moins deux éléments de support définissent une rainure de canal d'écoulement de refroidissement ; une entrée et une sortie de la rainure de canal d'écoulement de refroidissement sont respectivement situées dans les ouvertures au niveau de deux extrémités de la cavité de réception ; et un canal de refroidissement est formé entre chaque rainure de canal d'écoulement de refroidissement et l'enroulement de stator. La douille isolante fournie par la présente invention présente les avantages de faciliter la formation de canaux de refroidissement en contact direct avec des enroulements de stator, et d'obtenir un bon effet de refroidissement sur des enroulements de stator.
PCT/CN2024/099386 2023-06-16 2024-06-14 Douille isolante, moteur en épingle à cheveux et véhicule WO2024255881A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202321562376.2 2023-06-16
CN202321562376.2U CN220527756U (zh) 2023-06-16 2023-06-16 绝缘衬套、扁线电机和车辆
CN202321555757.8U CN220022445U (zh) 2023-06-16 2023-06-16 绝缘衬套、扁线电机和车辆
CN202321555757.8 2023-06-16

Publications (1)

Publication Number Publication Date
WO2024255881A1 true WO2024255881A1 (fr) 2024-12-19

Family

ID=93851361

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/099386 WO2024255881A1 (fr) 2023-06-16 2024-06-14 Douille isolante, moteur en épingle à cheveux et véhicule

Country Status (1)

Country Link
WO (1) WO2024255881A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020180284A1 (en) * 2001-04-20 2002-12-05 Leflem Graham Cooling of electrical machines
CN1420258A (zh) * 2001-11-15 2003-05-28 通用电气公司 可变定子叶片支承结构
JP2019183859A (ja) * 2018-04-02 2019-10-24 株式会社ジェイテクト 巻きブッシュの取付構造
CN220022445U (zh) * 2023-06-16 2023-11-14 上海理想汽车科技有限公司 绝缘衬套、扁线电机和车辆
CN220527756U (zh) * 2023-06-16 2024-02-23 上海理想汽车科技有限公司 绝缘衬套、扁线电机和车辆

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020180284A1 (en) * 2001-04-20 2002-12-05 Leflem Graham Cooling of electrical machines
CN1420258A (zh) * 2001-11-15 2003-05-28 通用电气公司 可变定子叶片支承结构
JP2019183859A (ja) * 2018-04-02 2019-10-24 株式会社ジェイテクト 巻きブッシュの取付構造
CN220022445U (zh) * 2023-06-16 2023-11-14 上海理想汽车科技有限公司 绝缘衬套、扁线电机和车辆
CN220527756U (zh) * 2023-06-16 2024-02-23 上海理想汽车科技有限公司 绝缘衬套、扁线电机和车辆

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