WO2022082412A1 - 汇流环端子、集电环和电机 - Google Patents

汇流环端子、集电环和电机 Download PDF

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Publication number
WO2022082412A1
WO2022082412A1 PCT/CN2020/122091 CN2020122091W WO2022082412A1 WO 2022082412 A1 WO2022082412 A1 WO 2022082412A1 CN 2020122091 W CN2020122091 W CN 2020122091W WO 2022082412 A1 WO2022082412 A1 WO 2022082412A1
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WIPO (PCT)
Prior art keywords
bus ring
lead
bus
ring terminal
ring
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PCT/CN2020/122091
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English (en)
French (fr)
Inventor
厉乐盛
张泽东
周醒夫
Original Assignee
舍弗勒技术股份两合公司
厉乐盛
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.)
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Publication date
Application filed by 舍弗勒技术股份两合公司, 厉乐盛 filed Critical 舍弗勒技术股份两合公司
Priority to US18/032,301 priority Critical patent/US20230402893A1/en
Priority to PCT/CN2020/122091 priority patent/WO2022082412A1/zh
Priority to DE112020007715.2T priority patent/DE112020007715T5/de
Priority to CN202080104253.7A priority patent/CN116114150B/zh
Publication of WO2022082412A1 publication Critical patent/WO2022082412A1/zh

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    • 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
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/06—Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations

Definitions

  • the present invention relates to the field of electrical machines, and in particular to slip rings and slip ring terminals for electrical machines.
  • FIGS. 1 and 2 show schematic diagrams of a possible partial structure of a collector ring of the motor.
  • the bus ring includes three bus rings 20 and three bus ring terminals 10 , and each bus ring 20 is connected to one bus ring terminal 10 .
  • the bus rings 20 are used for connecting with the stator winding, each bus ring 20 corresponds to the current of one phase, and the bus ring terminals 10 are used for connecting with the high-voltage leads of the external circuit.
  • the bus ring terminal 10 includes a main body 11 and a connecting part 12 , the connecting part 12 is in the shape of a flat plate, and the connecting part 12 is welded and fixed to the lead end 21 ; One end has a screw hole 110 .
  • the bus ring terminal 10 needs to be positioned by means of an additional tool, and the clamping position between the tool and the bus ring terminal 10 is, for example, on the side of the screw hole 110 .
  • the welding is, for example, laser welding.
  • the bus ring terminal 10 is deviated from a predetermined position, so that the position of the screw hole 110 is deviated.
  • the cost of laser welding is high.
  • the bus ring terminal 10 and the bus ring 20 are only adhered at the welding point, and the bus ring terminal 10 is easily detached from the bus ring 20 due to, for example, a radial shear force applied to the bus ring terminal 10 .
  • the purpose of the present invention is to overcome or at least alleviate the above-mentioned deficiencies of the prior art, and to provide a bus ring terminal, a collector ring and a motor with a simple structure and high reliability.
  • a bus ring terminal for connecting with a lead end of a bus ring of a motor, the bus ring terminal comprising a main body and a connection part located at one end of the main body, wherein,
  • the connecting portion is used to surround the lead end at least in the circumferential direction of the lead end, so that the bus ring terminal can be positioned relative to the lead end in the radial direction and the circumferential direction of the bus ring.
  • the connecting portion includes a peripheral wall portion, and the peripheral wall portion is used to surround the lead-out end in the peripheral direction.
  • the peripheral wall portion has a C-shape in a cross-section perpendicular to the axial direction of the bus ring.
  • the peripheral wall portion is provided with a slit in the peripheral direction
  • the slot is used to be provided between the two lead ends.
  • the connecting portion is further configured to abut the end portion of the lead end in the axial direction with the lead end, so that the bus ring terminal can be positioned on the shaft relative to the lead end. Positioned upwards.
  • the connecting portion further includes an end wall portion, the end wall portion is provided at one end portion in the axial direction of the peripheral wall portion, and the end wall portion is used for the axial direction of the peripheral wall portion. contact with the lead-out end.
  • the connecting portion is formed by a bending process.
  • a slip ring comprising one or more bus rings, each of the bus rings having one or more terminals, wherein,
  • Each of the bus rings is connected to the terminal with at least one bus ring terminal according to the present invention.
  • the end portion of the lead-out end overhanging in the axial direction of the bus ring does not exceed the connecting portion of the bus ring terminal in the axial direction.
  • the bus ring is connected to the bus ring terminal by a welding process.
  • the bus ring is connected to the bus ring terminal by resistance welding.
  • a motor which includes a stator winding and a high-voltage lead wire, and further includes a slip ring according to the present invention, wherein the slip ring of the slip ring is connected to the stator winding, The bus ring terminal of the slip ring is connected to the high voltage lead.
  • the bus ring terminal according to the present invention has a simple structure and is convenient to be positioned with the bus ring.
  • the slip ring according to the present invention has a simple structure, high positional accuracy, low manufacturing cost and is not easily damaged.
  • the electric machine according to the invention has the same advantages.
  • Figure 1 is an axial schematic view of a partial structure of a possible slip ring.
  • FIG. 2 is a schematic view of the slip ring in FIG. 1 viewed in a radial direction.
  • FIG 3 is an axial schematic view of a partial structure of a slip ring according to an embodiment of the present invention.
  • FIG. 4 is a schematic perspective view of a partial structure of a slip ring according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a bus ring terminal according to one embodiment of the present invention.
  • FIGS. 3 to 5 taking a three-phase motor as an example, a motor, a slip ring and a bus ring terminal according to an embodiment of the present invention are introduced.
  • the motor includes stator windings, slip rings and high voltage leads.
  • the stator winding includes three groups, namely U-phase winding, V-phase winding and W-phase winding. Each phase winding is used to connect with one high-voltage lead wire respectively, and the collector ring plays the role of connecting the winding and the high-voltage lead wire.
  • the slip ring also called a bus bar or a bus bar, includes a bus ring terminal 10 and a bus ring 20 .
  • Each bus ring 20 is connected to one bus ring terminal 10 .
  • the bus ring 20 is annular, and the three bus rings 20 are arranged concentrically, and the bus rings 20 are arranged concentrically with the stator of the motor.
  • Two lead ends 21 are formed on each bus ring 20.
  • the lead ends 21 are short cylindrical, the lead ends 21 protrude from the axial surface of one side of the bus ring 20, and the lead ends 21 are along the bus The axial extension of the ring 20 .
  • the bus ring terminal 10 includes a main body 11 and a connection portion 12 .
  • the main body 11 is substantially strip-shaped, and the connecting portion 12 is located at one end of the main body 11 .
  • the main body 11 is used for connecting with the high voltage lead wire, and the connecting part 12 is used for connecting to the lead terminal 21 .
  • the connecting portion 12 is C-shaped in a cross section perpendicular to the axial direction of the bus ring 20 .
  • the connecting portion 12 embraces the two lead ends 21 on one bus ring 20 .
  • the contour of the inner peripheral wall with which the end 21 abuts is the same as that of the outer peripheral wall of the lead-out end 21 .
  • connection portion 12 and the lead end 21 are firmly connected by welding, and the substantially annular connecting portion 12 in this embodiment enables the bus ring terminal 10 to be in the position of the bus ring 20 relative to the lead end 21 before welding. Roughly positioned radially and circumferentially.
  • the C-shaped connecting portion 12 forms a slit 12 a between two ends in the circumferential direction, and in this embodiment, the slit 12 a is located between the two leading ends 21 .
  • the connecting portion 12 is formed by a sheet metal bending process.
  • the fabrication material of the bus ring terminal 10 includes copper, and the connection portion 12 is formed by bending a punched copper sheet.
  • the connecting portion 12 can position the bus ring terminal 10 and the bus ring 20 in the radial direction and the circumferential direction, during welding, it is only necessary to position the bus ring terminal 10 in the axial direction of the bus ring 20 by means of a simple tool, for example.
  • the positioning tooling is simple in structure and low in cost.
  • the connecting portion 12 can also share the external force on the bus ring terminal 10 in the radial direction and the circumferential direction, so that the bus ring terminal 10 is not easy to fall off from the bus ring 20 . This reduces the quality requirements on the welding process, so that the bus ring terminals 10 and the bus ring 20 can be welded using low-cost welding methods such as resistance welding.
  • the end portion of the lead end 21 overhanging in the axial direction of the bus ring 20 does not exceed the connecting portion 12 of the bus ring terminal 10 in the axial direction, for example, the end portion of the lead end 21 in the axial direction
  • the overhanging end is flush with the upper end of the connecting portion 12 .
  • the end of the main body 11 away from the connecting portion 12 is bent to form a lead connecting end 13 parallel to the plane where the bus ring 20 is located, and the lead connecting end 13 is provided with a screw hole 110 .
  • the high voltage leads can be fixed in the screw holes 110 by screws or bolts.
  • the connecting portion 12 can position the bus ring terminal 10 in the radial direction and the circumferential direction of the bus ring 20 , the present invention does not limit the specific shape and structure of the connecting portion 12 .
  • the connecting portion 12 may form a complete ring shape without the slit 12a in the figure.
  • the connecting portion 12 may have a plurality of slits in the circumferential direction of the lead-out end 21 , that is, the connecting portion 12 is formed by bending a plurality of bending portions separated in the circumferential direction individually.
  • the connecting portion 12 may further include an end wall portion capable of positioning the bus ring terminal 10 in the axial direction of the bus ring 20. That is, referring to FIGS. 3 to 5 , the connecting portion 12 in the figures only includes a peripheral wall portion surrounding the lead end 21 in the peripheral direction. In order to achieve the positioning in the axial direction at the same time, the axial end portion of the peripheral wall portion in the figures also includes An end wall portion is connected, and the end wall portion abuts the lead end 21 at the axial end portion of the lead end 21 .
  • the end wall portion may completely cover the annular space surrounded by the peripheral wall portion, that is, the entire connecting portion 12 is in the shape of a cover, or may only cover a part of the annular space surrounded by the peripheral wall portion.
  • the bus ring terminal 10 has a simple structure and can be conveniently connected and positioned with the lead end 21 .
  • the bus ring terminal 10 according to the present invention When the bus ring terminal 10 according to the present invention is connected to the bus ring 20, only a simple positioning tool can be used, or even no positioning tool is used, and the welding process can use low-cost resistance welding, etc., and the manufacturing cost is low. Compared with, for example, laser welding, resistance welding is less likely to cause deformation of the welded portion, so that the positional accuracy of the bus ring terminal 10 can be better ensured.
  • the bus ring terminal 10 and the bus ring 20 are positioned accurately, and the connection is firm and not easy to fall off.
  • the number of bus rings may not be three, but other numbers.
  • the present invention does not limit the number of terminals on each bus ring 20, which may be one or more than two, for example.
  • Each bus ring 20 may also be connected to more than one bus ring terminal 10 .
  • the connecting portion 12 may also be formed by other processes such as punching.
  • the shape of the connecting portion 12 can also be formed in the process of connecting with the lead end 21.
  • the connecting portion 12 before the connecting portion 12 is connected with the lead end 21, it can be in the shape of a ring with a larger inner diameter.
  • the connecting portion 12 is deformed in a direction perpendicular to the axial direction by using a tool, so that the connecting portion 12 is closely abutted to the outer periphery of the lead-out end 21 .
  • the bus ring terminal 10 and the bus ring 20 may also be connected by laser welding or the like.

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

Abstract

一种汇流环端子（10）、集电环和电机，汇流环端子（10）用于与电机的汇流环（20）的引出端（21）相连，所述汇流环端子（10）包括主体（11）和位于所述主体（11）的一端的连接部（12），其中，所述连接部（12）用于至少在所述引出端（21）的周向上环绕所述引出端（21），使所述汇流环端子（10）能相对于所述引出端（21）在所述汇流环（20）的径向上和周向上得到定位。

Description

汇流环端子、集电环和电机 技术领域
本发明涉及电机领域，且特别地涉及电机的集电环和汇流环端子。
背景技术
以三相电机为例，图1和图2示出了一种可能的电机的集电环的部分结构的示意图。
该集电环包括三个汇流环20和三个汇流环端子10，每个汇流环20与一个汇流环端子10相连。汇流环20用于与定子绕组相连，每个汇流环20对应一个相位的电流，汇流环端子10用于与外电路的高压引线相连。
该方案中，每个汇流环20上形成两个沿轴向凸出的引出端21。汇流环端子10包括主体11和连接部12，连接部12呈平板状，连接部12与引出端21焊接固定；主体11向汇流环20的轴向一侧延伸，主体11的远离连接部12的一端具有螺孔110。
通常，在焊接时，需要借助额外的工装将汇流环端子10定位，工装与汇流环端子10的夹持位置例如位于螺孔110一侧。焊接例如为激光焊。
然而，由于例如定位误差、焊接时的高温和焊接的残余应力，通常，在焊接完成后，汇流环端子10会偏离预定的位置，使得螺孔110的位置有偏差。
并且，激光焊接的成本高。此外，汇流环端子10和汇流环20仅在焊接点粘连，汇流环端子10受到的例如径向上的剪切力容易使汇流环端子10从汇流环20上脱落。
发明内容
本发明的目的在于克服或至少减轻上述现有技术存在的不足，提供一种 结构简单、可靠性高的汇流环端子、集电环和电机。
根据本发明的第一方面，提供一种汇流环端子，其用于与电机的汇流环的引出端相连，所述汇流环端子包括主体和位于所述主体的一端的连接部，其中，
所述连接部用于至少在所述引出端的周向上环绕所述引出端，使所述汇流环端子能相对于所述引出端在所述汇流环的径向上和周向上得到定位。
在至少一个实施方式中，所述连接部包括周壁部，所述周壁部用于在所述周向上环抱所述引出端。
在至少一个实施方式中，所述周壁部在与所述汇流环的轴向垂直的截面中呈C形。
在至少一个实施方式中，所述周壁部在所述周向上留有缝隙，
对于具有两个引出端的所述汇流环，所述缝隙用于设置于所述两个引出端之间。
在至少一个实施方式中，所述连接部还用于在所述引出端的轴向上的端部与所述引出端相抵接，使所述汇流环端子能相对于所述引出端在所述轴向上得到定位。
在至少一个实施方式中，所述连接部还包括端壁部，所述端壁部设置于所述周壁部的轴向上的一个端部，所述端壁部用于在所述轴向上与所述引出端相抵接。
在至少一个实施方式中，所述连接部通过折弯工艺形成。
根据本发明的第二方面，提供一种集电环，其包括一个或多个汇流环，每个所述汇流环具有一个或多个引出端，其中，
每个所述汇流环与至少一个根据本发明的汇流环端子相连于所述引出端。
在至少一个实施方式中，所述引出端的在所述汇流环的轴向上悬出的端部在所述轴向上不超出所述汇流环端子的所述连接部。
在至少一个实施方式中，所述汇流环与所述汇流环端子通过焊接工艺相连。
在至少一个实施方式中，所述汇流环与所述汇流环端子通过电阻焊相连。
根据本发明的第三方面，提供一种电机，其包括定子绕组和高压引线，其中，还包括根据本发明的集电环，所述集电环的所述汇流环与所述定子绕组相连，所述集电环的所述汇流环端子和所述高压引线相连。
根据本发明的汇流环端子结构简单且方便与汇流环定位。
根据本发明的集电环结构简单、位置精度高、制作成本低且不容易损坏。
根据本发明的电机具有同样的优点。
附图说明
图1是一种可能的集电环的局部结构的轴向示意图。
图2是沿径向观察的图1中的集电环的示意图。
图3是根据本发明的一个实施方式的集电环的局部结构的轴向示意图。
图4是根据本发明的一个实施方式的集电环的局部结构的立体示意图。
图5是根据本发明的一个实施方式的汇流环端子的示意图。
附图标记说明：
10汇流环端子；11主体；110螺孔；12连接部；12a缝隙；13引线连接端；
20汇流环；21引出端。
具体实施方式
下面参照附图描述本发明的示例性实施方式。应当理解，这些具体的说明仅用于示教本领域技术人员如何实施本发明，而不用于穷举本发明的所有可行的方式，也不用于限制本发明的范围。
参照图3至图5，以三相电机为例，介绍根据本发明的一个实施方式的电机、集电环和汇流环端子。
电机包括定子绕组、集电环和高压引线。定子绕组包括三组，即U相绕组、V相绕组和W相绕组，各相绕组分别用于与一路高压引线相连，集电环起到了连接绕组和高压引线的作用。
集电环也称为集线排或汇流排，其包括汇流环端子10和汇流环20。汇流环20可以有三个，三个汇流环20彼此绝缘地间隔开。每个汇流环20与一个汇流环端子10相连。
在本实施方式中，汇流环20呈环形，三个汇流环20同心地设置，且汇流环20与电机的定子同心地设置。
每个汇流环20上形成两个引出端21，在本实施方式中，引出端21呈短柱形，引出端21凸出于汇流环20的一侧的轴向表面，且引出端21沿汇流环20的轴向延伸。
汇流环端子10包括主体11和连接部12。主体11呈大致条状，连接部12位于主体11的一个端部。主体11用于与高压引线相连，连接部12用于连接到引出端21。
在本实施方式中，连接部12在垂直于汇流环20的轴向的截面中呈C形，连接部12将一个汇流环20上的两个引出端21环抱住，连接部12的与引出端21相抵接的内周壁的轮廓与引出端21的外周壁的轮廓形状相同。
通常，连接部12与引出端21会通过焊接而形成牢固的连接，本实施方式中的大致环形的连接部12使得，在焊接前，汇流环端子10能相对于引出端21 在汇流环20的径向和周向上大致定位。
C形的连接部12在周向上的两个端部之间形成缝隙12a，在本实施方式中，缝隙12a位于两个引出端21之间。
可选地，连接部12通过钣金折弯工艺形成。例如，汇流环端子10的制作材料包括铜，连接部12通过将冲裁好的铜片折弯而形成。
由于连接部12能使汇流环端子10与汇流环20在径向上和周向上定位，在焊接时，只需例如借助简单的工装对汇流环端子10在汇流环20的轴向上定位即可。定位工装结构简单、成本低。
并且，在完成焊接后，连接部12还可以在径向上和周向上分担汇流环端子10所受的外力，使得汇流环端子10不容易从汇流环20上脱落。这降低了对焊接工艺的质量要求，于是可以使用例如电阻焊等低成本的焊接方式焊接汇流环端子10和汇流环20。
优选地，在完成焊接后，引出端21的在汇流环20的轴向上悬出的端部在轴向上不超出汇流环端子10的连接部12，例如，该引出端21的在轴向上悬出的端部与连接部12的上端齐平。
优选地，主体11的远离连接部12的端部折弯而形成与汇流环20所在的平面相平行的引线连接端13，引线连接端13上设有螺孔110。高压引线可以被螺钉或螺栓固定在螺孔110内。
应当理解，在连接部12能在汇流环20的径向上和周向上对汇流环端子10定位的基础上，本发明对连接部12的具体形状结构不作限制。
例如，连接部12可以形成完整的环形而不具有图中的缝隙12a。或者，连接部12可以在引出端21的周向上具有多个缝隙，即，连接部12由多个在周向上分开的折弯部单独折弯而形成。
又例如，连接部12还可以包括能在汇流环20的轴向上对汇流环端子10定 位的端壁部。即，参考图3至图5，图中的连接部12只包括在周向上环绕引出端21的周壁部，为同时实现在轴向上的定位，在图中的周壁部的轴向端部还连接有端壁部，该端壁部在引出端21的轴向端部与引出端21相抵接。
端壁部可以完整地覆盖周壁部所环绕的环形空间，即，使得整个连接部12呈盖状，也可以仅覆盖周壁部所环绕的环形空间内的部分区域。
下面简单说明本发明的上述实施方式的部分有益效果。
根据本发明的汇流环端子10结构简单且能方便地与引出端21连接定位。
根据本发明的汇流环端子10在与汇流环20相连时，可以只使用简单的定位工装、甚至不使用定位工装，且焊接工艺可以使用成本较低的电阻焊等，制造成本低。与例如激光焊相比，电阻焊不容易引起焊接部位的变形，从而可以更好地确保汇流环端子10的位置精度。
根据本发明的汇流环端子10与汇流环20定位准确、连接牢固不容易脱落。
应当理解，上述实施方式仅是示例性的，不用于限制本发明。本领域技术人员可以在本发明的教导下对上述实施方式做出各种变型和改变，而不脱离本发明的范围。例如，
当电机的绕组相数并非为三相时，汇流环也可以不是3个、而是其它数量。
本发明对每个汇流环20上的引出端的数量不作限制，其例如可以是一个或多于两个。
每个汇流环20也可以与多于一个的汇流环端子10相连。
连接部12除了通过折弯工艺形成外，也可以通过例如冲裁等其它工艺形成。
连接部12的形状也可以是在与引出端21相连的过程中最终形成，例如， 连接部12在与引出端21相连前，可以是呈具有较大内径的环形，在将连接部12套设到引出端21的过程中，利用工具使连接部12在与轴向垂直方向上变形，从而使连接部12紧密地贴靠在引出端21的外周。
汇流环端子10与汇流环20也可以通过激光焊等相连。

Claims (12)

  1. 一种汇流环端子，其用于与电机的汇流环的引出端相连，所述汇流环端子包括主体和位于所述主体的一端的连接部，其中，
    所述连接部用于至少在所述引出端的周向上环绕所述引出端，使所述汇流环端子能相对于所述引出端在所述汇流环的径向上和周向上得到定位。
  2. 根据权利要求1所述的汇流环端子，其特征在于，所述连接部包括周壁部，所述周壁部用于在所述周向上环抱所述引出端。
  3. 根据权利要求2所述的汇流环端子，其特征在于，所述周壁部在与所述汇流环的轴向垂直的截面中呈C形。
  4. 根据权利要求2所述的汇流环端子，其特征在于，所述周壁部在所述周向上留有缝隙，
    对于具有两个引出端的所述汇流环，所述缝隙用于设置于所述两个引出端之间。
  5. 根据权利要求1所述的汇流环端子，其特征在于，所述连接部还用于在所述引出端的轴向上的端部与所述引出端相抵接，使所述汇流环端子能相对于所述引出端在所述轴向上得到定位。
  6. 根据权利要求2所述的汇流环端子，其特征在于，所述连接部还包括端壁部，所述端壁部设置于所述周壁部的轴向上的一个端部，所述端壁部用于在所述轴向上与所述引出端相抵接。
  7. 根据权利要求1至6中任一项所述的汇流环端子，其特征在于，所述连接部通过折弯工艺形成。
  8. 一种集电环，其包括一个或多个汇流环，每个所述汇流环具有一个或多个引出端，其特征在于，
    每个所述汇流环与至少一个根据权利要求1至7中任一项所述的汇流环端子相连于所述引出端。
  9. 根据权利要求8所述的集电环，其特征在于，所述引出端的在所述汇流环的轴向上悬出的端部在所述轴向上不超出所述汇流环端子的所述连接部。
  10. 根据权利要求8所述的集电环，其特征在于，所述汇流环与所述汇流环端子通过焊接工艺相连。
  11. 根据权利要求8所述的集电环，其特征在于，所述汇流环与所述汇流环端子通过电阻焊相连。
  12. 一种电机，其包括定子绕组和高压引线，其特征在于，还包括根据权利要求8至11中任一项所述的集电环，所述集电环的所述汇流环与所述定子绕组相连，所述集电环的所述汇流环端子和所述高压引线相连。
PCT/CN2020/122091 2020-10-20 2020-10-20 汇流环端子、集电环和电机 WO2022082412A1 (zh)

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