WO2024259801A1 - Ensemble stator de moteur à flux axial et moteur à flux axial - Google Patents

Ensemble stator de moteur à flux axial et moteur à flux axial Download PDF

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Publication number
WO2024259801A1
WO2024259801A1 PCT/CN2023/113669 CN2023113669W WO2024259801A1 WO 2024259801 A1 WO2024259801 A1 WO 2024259801A1 CN 2023113669 W CN2023113669 W CN 2023113669W WO 2024259801 A1 WO2024259801 A1 WO 2024259801A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulating
slot
insulation
axial flux
flux motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2023/113669
Other languages
English (en)
Chinese (zh)
Inventor
杨志标
李铭杰
李超
程静远
肖锐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Broad Ocean Motor Wuhan Research Institute Co Ltd
Original Assignee
Broad Ocean Motor Wuhan Research Institute Co Ltd
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 Broad Ocean Motor Wuhan Research Institute Co Ltd filed Critical Broad Ocean Motor Wuhan Research Institute Co Ltd
Publication of WO2024259801A1 publication Critical patent/WO2024259801A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • 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
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/12—Transversal flux machines
    • 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 invention belongs to a stator assembly of an axial flux motor and an axial flux motor.
  • Patent number: 202121854202.4 patent name: A utility model patent for a stator skeleton coil assembly of a disc motor. Its main content provides a stator skeleton coil assembly of a disc motor, including a skeleton and a coil.
  • the skeleton includes a tube body and a first rib. One end of the tube body extends outward along the periphery to form the first rib. Two limit platforms are provided on the first rib. The limit platform is located on the side of the first baffle away from the tube body.
  • the coil has two outlet heads. The coil is wound outside the tube body, and the two outlet heads are positioned on the limit platform. It can be produced using automated equipment to avoid the defects of short time and poor consistency caused by manual assembly, and the outlet head is positioned by the limit platform so that the outlet head can be subsequently welded and fixed to the circuit board.
  • the patented structure is only suitable for the stator core of an open slot axial flux motor.
  • the so-called open slot means that the slot of the wire embedding slot is completely open and unobstructed.
  • the patent number is 200980137807.7 and the patent name is a winding insulation device for an axial flux motor, which also adopts a similar insulation structure.
  • the structure is only applicable to the stator core of the open slot axial flux motor.
  • the insulating frame with the coil is inserted into the teeth of the stator core from the air gap side. If the tooth top is wider than the other parts of the tooth, it cannot be inserted, that is, it is not suitable for the slot of the wire embedding slot to adopt the closed slot structure;
  • the insulating frame with the coil is inserted into the stator core, it is not fixed in the axial direction.
  • the insulating frame may fall off or enter the air gap, affecting reliability;
  • the insulating skeleton frame does not provide protection or other treatment for the yoke, and the insulation and withstand voltage of the bridge wire at the yoke are not processed, resulting in many problems.
  • the insulation scheme of the wire embedding slot of the stator core of the axial flux motor adopts a closed slot structure, which usually adopts the method of placing slot paper in the wire embedding slot.
  • the process is complicated and the installation is troublesome. It is not suitable for the needs of automated production, and the creepage distance is difficult to guarantee, and the reliability is low.
  • the purpose of the present invention is to provide a stator assembly of an axial flux motor and an axial flux motor, which solves the problem that the slots of the wire embedding slots of the stator core of the axial flux motor in the prior art adopt a closed slot structure.
  • the insulation solution usually adopts the method of placing slot paper in the wire trough, which has complex process and troublesome installation, is not suitable for the needs of automated production, and has technical problems such as difficult to ensure creepage distance and low reliability.
  • the stator assembly of an axial flux motor includes a stator core and an insulating frame.
  • the stator core includes an annular yoke and a plurality of teeth protruding axially from the top surface of the annular yoke.
  • the plurality of teeth are evenly distributed along the circumferential interval, and a wire embedding groove is formed between two adjacent teeth.
  • the teeth and the wire embedding groove are arranged to extend radially.
  • the invention is characterized in that the insulating frame includes an inner ring frame and a plurality of slot insulation reference frames.
  • the slot insulation reference frame includes a slot insulation portion and an outer insulation baffle located outside the slot insulation portion.
  • the inner ring frame covers the inner side surface of the stator core.
  • a locking strip extends from the inner side of the slot insulation portion.
  • the locking strip is snapped into the inner ring frame so that the inner ring frame and the plurality of slot insulation reference frames are buckled together.
  • the outer insulation baffle covers the outer side surface of the annular yoke.
  • the above-mentioned inner ring skeleton includes an inner annular insulating ring and a plurality of inner tooth insulations protruding axially from the top surface of the inner annular insulating ring.
  • the plurality of inner tooth insulations are evenly distributed along the circumferential direction, and the inner annular insulating ring covers the inner side surface of the annular yoke; each inner tooth insulation covers the inner side surface of a tooth.
  • the outer insulating baffle covers the outer side surface of the annular yoke portion and the outer side surface of the tooth portion.
  • the slot insulation part includes an insulating bottom plate and side wall insulating plates located on both sides of the insulating bottom plate.
  • the top of the side wall insulating plate is inclined toward the slot opening and extends out of the top wall insulating plate.
  • Baffles for shielding the slot opening of the wire embedding slot extend out from both sides of the top of the tooth portion.
  • the insulating bottom plate and the side wall insulating plates cover the slot bottom wall and side wall of the wire embedding slot respectively, and the top wall insulating plate is against the bottom surface of the baffle.
  • the above-mentioned external insulating baffle includes an external tooth insulation located at the top and an external yoke insulation located at the bottom, the external tooth insulation covers the outer side surface of a tooth; the external yoke insulation covers the outer side surface of the annular yoke.
  • the outer yoke parts of the above-mentioned several slot insulation reference frames are insulated and connected to form a ring.
  • the top of the outer yoke insulation protrudes outward with a plurality of partition strips to facilitate wiring.
  • An axial flux motor comprises a stator assembly and a rotor assembly, the stator assembly and the rotor assembly Axial magnetic coupling is characterized in that the stator assembly is the above-mentioned axial flux motor stator assembly.
  • the present invention has the following advantages:
  • the reverse buckle device on the slot insulation reference frame can fix the inner ring frame, and the two are interlocked to ensure that the frame as a whole cannot move.
  • the process is simple, the installation is convenient, and it meets the needs of automated production.
  • the creepage distance is easy to ensure, and the reliability is greatly improved.
  • Effect 2 Increasing the radial length of the slot insulation reference frame can increase the voltage resistance level of the contact part, control the risk point, and improve reliability.
  • the slot insulation reference frame can also ensure that the bridge wire does not contact the core yoke, thereby improving the withstand voltage level.
  • the wire separation structure set in the yoke of the slot insulation reference frame can ensure the phase-to-phase voltage withstand level and improve the safety factor.
  • FIG1 is a perspective view of a first embodiment of the present invention
  • FIG2 is a three-dimensional view from another angle of the first embodiment of the present invention.
  • FIG3 is an exploded view of a state of the first embodiment of the present invention.
  • FIG4 is an exploded view of another state of the first embodiment of the present invention.
  • FIG5 is a perspective view of a stator core according to Embodiment 1 of the present invention.
  • FIG6 is a perspective view of a slot insulation reference frame at one angle according to the first embodiment of the present invention.
  • FIG7 is a three-dimensional view of the slot insulation reference frame of the first embodiment of the present invention from another angle;
  • FIG8 is a top view of the first embodiment of the present invention.
  • Fig. 9 is a cross-sectional view taken along line A-A of Fig. 8;
  • FIG10 is a front view of Embodiment 1 of the present invention.
  • Fig. 11 is a cross-sectional view taken along line B-B of Fig. 10;
  • FIG. 12 is a partial enlarged view of portion C of FIG. 11 .
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the present embodiment provides a stator assembly of an axial flux motor, comprising a stator core 1 and an insulating frame 2 (coil windings are not shown in the figures), the stator core 1 comprising an annular yoke 11 and a plurality of teeth 12 protruding axially from the top surface of the annular yoke 11, the plurality of teeth 12 being evenly spaced and distributed along the circumferential direction, a wire embedding groove 13 being formed between two adjacent teeth 12, the teeth 12 and the wire embedding groove 13 extending radially, characterized in that: the insulating frame 2 comprises an inner ring frame 21 and a plurality of block grooves
  • the insulating reference frame 22 includes a slot insulating portion 221 and an outer insulating baffle 222 located outside the slot insulating portion 221.
  • the inner ring frame 21 covers the inner side of the stator core 1.
  • a locking strip 223 extends from the inner side of the slot insulating portion 221.
  • the locking strip 223 snaps into the inner ring frame 21 so that the inner ring frame 21 and several slot insulating reference frames 22 are buckled together.
  • the outer insulating baffle 222 covers the outer side of the annular yoke 11.
  • the buckle device (i.e., the locking strip 223) on the slot insulating reference frame 22 can fix the inner ring frame 21, and the two are interlocked to ensure that the frame as a whole cannot move.
  • the process is simple, the installation is convenient, and it meets the needs of automated production.
  • the creepage distance is easy to ensure, and the reliability is greatly improved.
  • the above-mentioned inner ring skeleton 21 includes an inner annular insulating ring 211 and a plurality of inner tooth insulations 212 protruding axially from the top surface of the inner annular insulating ring 211.
  • the plurality of inner tooth insulations 212 are evenly distributed along the circumferential direction.
  • the inner annular insulating ring 211 covers the inner side surface 111 of the annular yoke 11; each inner tooth insulation 212 covers the inner side surface 121 of a tooth 12, with a simple structure and good insulation.
  • the outer insulating baffle 222 covers the outer side surface 112 of the annular yoke 11 and the outer side surface 122 of the tooth portion 12, and has good insulation and a simple structure.
  • the slot insulating part 221 includes an insulating bottom plate 221a and side wall insulating plates 221b located on both sides of the insulating bottom plate 221a.
  • the top of the side wall insulating plate 221b is inclined toward the notch 131 and extends out of the top wall insulating plate 221c.
  • the top sides of the tooth part 12 extend out of the baffles 123 for shielding the notch 131 of the wire embedding groove 13.
  • the insulating bottom plate 221a and the side wall insulating plates 221b cover the bottom wall and side wall of the wire embedding groove 13 respectively.
  • the top wall insulating plate 221c is against the bottom surface of the baffle 123.
  • the slot insulating part 221 is covered by the wire embedding groove 13 and cannot move axially.
  • the reverse buckle device on the slot insulating reference frame 22 can fix the inner ring frame 21, and the two are interlocked and cannot move radially.
  • the process is simple, the installation is convenient, and it meets the needs of automated production.
  • the creepage distance is easy to ensure, and the reliability is greatly improved. .
  • the above-mentioned external insulating baffle 222 includes an external tooth insulation 222a located at the top and an external yoke insulation 222b located at the bottom.
  • the external tooth insulation 222a covers the outer side surface 122 of a tooth 12; the external yoke insulation 222b covers the outer side surface 112 of the annular yoke 11, with a simple structure and good insulation.
  • the outer yoke insulation 222b of the above-mentioned several slot insulation reference skeletons 22 are connected to form a ring, which ensures the insulation between the outer side surface 112 of the annular yoke 11 and the coil winding of the stator assembly and the creepage distance.
  • a plurality of partition bars 222b1 protrude outward from the top of the outer yoke insulation 222b, which facilitates the layered passage of the bridge wires of the coil windings of the stator assembly, improves insulation, and allows the bridge wires to be arranged more neatly without mutual interference.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides an axial flux motor, including a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are axially magnetically coupled, and is characterized in that: the stator assembly is the stator assembly of the axial flux motor described in Example 1.
  • the buckle device i.e., the buckle strip 223) on the slot insulation reference frame can fix the inner ring frame, and the two are interlocked to ensure that the frame as a whole cannot move, the process is simple, the installation is convenient, and it meets the needs of automated production, and the creepage distance is easy to ensure, and the reliability is greatly improved.

Landscapes

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

Abstract

L'invention concerne un ensemble stator d'un moteur à flux axial et un moteur à flux axial. L'ensemble stator comprend un noyau de stator et une bobine d'isolation ; le noyau de stator comprend une partie de culasse annulaire et une pluralité de parties de dent, une fente de fil est formée entre chaque paire de parties de dent adjacentes, et les parties de dent et les fentes de fil s'étendent dans la direction radiale ; la bobine d'isolation comprend une bobine annulaire interne et une pluralité de bobines de référence d'isolation de fente ; chaque bobine de référence d'isolation de fente comprend une partie d'isolation de fente et une plaque de blocage d'isolation externe située sur le côté externe de la partie d'isolation de fente ; la bobine annulaire interne recouvre la surface latérale interne du noyau de stator ; une bande de verrouillage s'étend hors du côté interne de la partie d'isolation de fente ; lorsque les parties d'isolation de fente sont incorporées dans les fentes de fil, les bandes de verrouillage sont ajustées sur la bobine annulaire interne de telle sorte que la bobine annulaire interne et la pluralité de bobines de référence d'isolation de fente sont ajustées ensemble. Selon la présente invention, il est garanti que la bobine entière ne peut pas se déplacer, le procédé est simple, il est pratique à monter, l'exigence de production automatique est satisfaite, il est facile de garantir le fluage, et la fiabilité est considérablement améliorée.
PCT/CN2023/113669 2023-06-20 2023-08-18 Ensemble stator de moteur à flux axial et moteur à flux axial Pending WO2024259801A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202310738023.1 2023-06-20
CN202310738023.1A CN116722687A (zh) 2023-06-20 2023-06-20 轴向磁通电机的定子组件及轴向磁通电机

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WO2024259801A1 true WO2024259801A1 (fr) 2024-12-26

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PCT/CN2023/113669 Pending WO2024259801A1 (fr) 2023-06-20 2023-08-18 Ensemble stator de moteur à flux axial et moteur à flux axial

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WO (1) WO2024259801A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117895676B (zh) * 2023-12-29 2024-12-10 比亚迪股份有限公司 定子铁芯组件、定子组件、直线电机、悬架装置及车辆

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203660698U (zh) * 2013-12-27 2014-06-18 中山大洋电机制造有限公司 一种电机定子铁芯上的端部绝缘结构及其应用的塑封电机
JP2017079553A (ja) * 2015-10-21 2017-04-27 トヨタ自動車株式会社 電動機用ステータ
CN208209645U (zh) * 2018-04-20 2018-12-07 嵊州市越风电器有限公司 交流塑封电机
CN111404294A (zh) * 2020-05-09 2020-07-10 横店集团英洛华电气有限公司 外转子电机的定子组件
CN113300520A (zh) * 2021-05-17 2021-08-24 安徽威灵汽车部件有限公司 绝缘骨架、定子、电机、压缩机和车辆
CN113572282A (zh) * 2021-08-09 2021-10-29 浙江盘毂动力科技有限公司 绕组定子结构、定子总成及盘式电机
CN114785007A (zh) * 2022-05-16 2022-07-22 苏州爱知科技有限公司 一种拼接式定子组件和电动机
CN218183088U (zh) * 2022-09-19 2022-12-30 大洋电机(武汉)研究院有限公司 一种轴向磁通电机的定子铁芯结构及轴向磁通电机
WO2023087573A1 (fr) * 2021-11-19 2023-05-25 广东美芝制冷设备有限公司 Structure isolante, stator, moteur, compresseur et appareil de réfrigération

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203660698U (zh) * 2013-12-27 2014-06-18 中山大洋电机制造有限公司 一种电机定子铁芯上的端部绝缘结构及其应用的塑封电机
JP2017079553A (ja) * 2015-10-21 2017-04-27 トヨタ自動車株式会社 電動機用ステータ
CN208209645U (zh) * 2018-04-20 2018-12-07 嵊州市越风电器有限公司 交流塑封电机
CN111404294A (zh) * 2020-05-09 2020-07-10 横店集团英洛华电气有限公司 外转子电机的定子组件
CN113300520A (zh) * 2021-05-17 2021-08-24 安徽威灵汽车部件有限公司 绝缘骨架、定子、电机、压缩机和车辆
CN113572282A (zh) * 2021-08-09 2021-10-29 浙江盘毂动力科技有限公司 绕组定子结构、定子总成及盘式电机
WO2023087573A1 (fr) * 2021-11-19 2023-05-25 广东美芝制冷设备有限公司 Structure isolante, stator, moteur, compresseur et appareil de réfrigération
CN114785007A (zh) * 2022-05-16 2022-07-22 苏州爱知科技有限公司 一种拼接式定子组件和电动机
CN218183088U (zh) * 2022-09-19 2022-12-30 大洋电机(武汉)研究院有限公司 一种轴向磁通电机的定子铁芯结构及轴向磁通电机

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