WO2022217424A1 - 电机用定子组件及其装配方法以及电机 - Google Patents

电机用定子组件及其装配方法以及电机 Download PDF

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Publication number
WO2022217424A1
WO2022217424A1 PCT/CN2021/086586 CN2021086586W WO2022217424A1 WO 2022217424 A1 WO2022217424 A1 WO 2022217424A1 CN 2021086586 W CN2021086586 W CN 2021086586W WO 2022217424 A1 WO2022217424 A1 WO 2022217424A1
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WO
WIPO (PCT)
Prior art keywords
conductor
iron core
stator assembly
slot
involute
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PCT/CN2021/086586
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English (en)
French (fr)
Inventor
李至浩
梁杰
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舍弗勒技术股份两合公司
李至浩
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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Application filed by 舍弗勒技术股份两合公司, 李至浩 filed Critical 舍弗勒技术股份两合公司
Priority to US18/555,092 priority Critical patent/US20240128823A1/en
Priority to PCT/CN2021/086586 priority patent/WO2022217424A1/zh
Priority to CN202180093071.9A priority patent/CN116888859A/zh
Priority to EP21936319.9A priority patent/EP4325695A1/de
Publication of WO2022217424A1 publication Critical patent/WO2022217424A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—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
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/06—Embedding prefabricated windings in machines
    • H02K15/062—Windings in slots; salient pole windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/10—Applying solid insulation to windings, stators or rotors

Definitions

  • the present invention relates to the field of electric motors, and more particularly, to a stator assembly for an electric motor and an assembling method thereof, and an electric motor including the stator assembly.
  • Motors are one of the traditional power sources and are widely used, not only for large-scale industrial equipment, but also for vehicles and the like.
  • a stator assembly for a motor generally, an insulating paper attached to the peripheral wall of the conductor slot is pre-arranged in the conductor slot of the iron core, and then the conductor (for example, the wave winding) is inserted into the conductor slot through the radial opening of the conductor slot.
  • the insulating paper is used to protect the conductor from damage during the insertion of the conductor, and the insulating paper can also provide insulation protection between the conductor and the iron core after the conductor is inserted into the conductor slot.
  • the iron core 10 of the stator assembly is formed with a plurality of conductor slots 10h that open toward the radially inner side, and the insulating paper 20 is attached to each conductor slot 10h.
  • a peripheral wall is installed in each conductor slot 10h so that the conductor 30 is inserted into the conductor slot 10h from the radially inner side through the radial opening of the conductor slot 10h (as indicated by the arrows in FIGS. 1A and 1B ).
  • the conductor slot 10h is a straight slot, and it is clearly seen from the cross section of the iron core 10 that the conductor slot 10h is rectangular.
  • the insulating paper 20 may not fit the conductor slot 10h in particular without being adhered to the peripheral wall of the conductor slot 10h.
  • the conductor 30 may It interferes with the end of the insulating paper 20 and curls the end of the insulating paper 20 . As shown in FIG.
  • An object of the present invention is to provide a new stator assembly for a motor and an assembling method thereof, which can avoid the occurrence of insulating paper during the process of inserting a conductor into a conductor slot, compared with the stator assembly for a motor described in the background art above.
  • Another object of the present invention is to provide a motor including the above stator assembly for a motor.
  • the present invention provides a stator assembly for a motor as follows, comprising:
  • an iron core including a cylindrical iron core main body part and a plurality of iron core tooth parts protruding from the iron core main body part in a radial direction of the iron core main body part And arranged along the circumferential direction of the iron core main body, a conductor groove for accommodating conductors is formed between every two adjacent iron core teeth in the circumferential direction, and the conductor grooves are formed by the the sidewalls formed by the core teeth include involute portions that are opposite to each other in the circumferential direction and gradually move away from each other as they extend toward the radial opening of the conductor slot; and
  • a sheet-like insulator that is accommodated in the conductor slot in a manner of being attached to the peripheral wall of the conductor slot and whose end portion is arranged in the involute portion.
  • the contour line of the involute portion extends linearly or curvilinearly.
  • the side wall further comprises equidistant portions adjacent to the involute portion, the equidistant portions are opposed to each other in the circumferential direction and the spacing between the equidistant portions in the circumferential direction Always equal in the radial direction.
  • the contour line of the involute portion and the contour line of the equidistant portion are formed.
  • the angle of the obtuse angle is not less than 150 degrees.
  • the non-smooth transition or smooth transition between the involute portion and the equidistant portion, and the sheet-like insulator forms a curved shape at the interface between the involute portion and the equidistant portion .
  • the end portion of the core tooth portion at the radial opening of the conductor slot has a slot wedge portion protruding toward the inside of the conductor slot, the slot wedge portion adjoining the involute portion .
  • the end of the sheet insulator extends to the face of the slot wedge abutting the involute.
  • the stator assembly for a motor includes conductors, and a plurality of conductors are accommodated and mounted in respective conductor slots formed by the iron core.
  • the conductor is a wave winding.
  • the present invention also provides a method for assembling a stator assembly for a motor according to any one of the above technical solutions, the assembling method comprising the following steps:
  • the sheet-like insulator is put into the conductor slot, the sheet-like insulator is bent at the junction of the involute portion and the equidistant portion of the side wall of the conductor slot, and the sheet-like insulator is attached to the conductor a peripheral wall of a slot and an end of the sheet-like insulator disposed at the involute;
  • a conductor is inserted into the conductor slot along the radial direction.
  • the present invention also provides a motor including the stator assembly for a motor according to any one of the above technical solutions.
  • the present invention provides a stator assembly for a motor and an assembling method thereof, wherein an involute portion is formed on a portion of the side wall of the conductor slot close to the radial opening of the conductor slot, and the sheet insulator (such as The end of the insulating paper) is arranged in the involute.
  • the conductor and the sheet-like insulator will not interfere unexpectedly, and the interference between the conductor and the sheet-like insulator will be avoided.
  • Adverse effects on the assembly process of the motor stator assembly while ensuring good insulation performance between the iron core and the conductors.
  • the present invention also provides a motor including the above stator assembly for a motor, which has the same beneficial effects.
  • FIG. 1A shows a partial assembly process of a stator assembly for a motor, in which conductors are ready to be inserted into conductor slots of an iron core in the direction of the arrow.
  • FIG. 1B shows a partial assembly process of the stator assembly for a motor in FIG. 1A , wherein the conductors are located at the radially open positions of the conductor slots and the ends of the insulating paper are crimped.
  • FIG. 2A is a schematic diagram showing a partial structure of an iron core of a stator assembly for a motor according to an embodiment of the present invention.
  • FIG. 2B is a schematic diagram showing a state after insulating paper is installed in the conductor groove of the iron core in FIG. 2A .
  • FIG. 2C to 2E are schematic diagrams illustrating a process of inserting a conductor into the conductor slot in which the insulating paper is installed in FIG. 2B , wherein the conductor is inserted into the conductor slot in the direction of the arrow.
  • axial direction axial direction
  • radial direction radial direction
  • circumferential direction respectively refer to the axial direction, radial direction and circumferential direction of the motor stator assembly (iron core main body part of the iron core).
  • a stator assembly for a motor includes an iron core 1 , an insulating paper 2 and a conductor 3 .
  • the iron core 1 includes a cylindrical iron core main body portion and a plurality of iron core tooth portions 11 protruding radially from the iron core main body portion and arranged in the circumferential direction, as shown in FIG. 2A .
  • FIG. 2E only the partial structure of the iron core 1 including a part of the iron core teeth 11 is cut out.
  • a conductor slot 1h for accommodating the insulating paper 2 and the conductor 3 is formed between every two adjacent core teeth 11, and each conductor slot 1h has a radial opening that opens radially inward.
  • the side wall of the conductor slot 1h formed by the core teeth 11 includes an involute portion 111 and an equally spaced portion 112 adjacent (adjacent and connected to each other) with the involute portion 111, and the involute portion 111 is located on the side wall of the conductor slot 1h In the portion of the 111 near the radial opening, the involute portion 111 is located on the radially inner side of the equidistant portion 112 .
  • the involute portions 111 of the two opposite side walls of the conductor slot 1h face each other in the circumferential direction, and the pitch of the involute portions 111 in the circumferential direction gradually increases toward the radial opening of the conductor slot 1h.
  • the equally spaced portions 112 are opposite to each other in the circumferential direction and the spacing between the equally spaced portions 112 in the circumferential direction is always equal in the radial direction.
  • the conductor slot 1h is not a straight slot like the conductor slot 10h in the background art.
  • the conductor groove 1h forms a larger space at the position where the end of the insulating paper 2 is arranged, which facilitates the insertion of the conductor 3 into the conductor groove 1h. There is no interference with the end of the insulating paper 2 .
  • the transition between the involute portion 111 and the equidistant portion 112 is not smooth, and the insulating paper 2 is located at the boundary portion (the boundary line extending along the axial direction) between the involute portion 111 and the equidistant portion 112
  • the bent shape is formed so that the insulating paper 2 can always be attached to the side wall of the conductor groove 1h.
  • the contour line of the involute portion 111 and the contour line of the equidistant portion 112 both extend linearly, and the involute portion
  • the angle of the obtuse angle formed by the contour line of 111 and the contour line of the equidistant portion 112 may be, for example, 170 degrees. In this way, even if the involute portion 111 is formed, the performance of the iron core 1 will not be adversely affected.
  • the end portion of the core tooth portion 11 at the radial opening of the conductor slot 1h has a slot wedge portion 113 protruding toward the inside of the conductor slot 1h, and the slot wedge portion 113 is adjacent to the involute portion 111 .
  • the surfaces of the slot wedge portion 113 adjoining the involute portion 111 approach each other while extending obliquely toward the radially inner side, the end portion of the insulating paper 2 extends to the surface of the slot wedge portion 113 adjoining the involute portion 111, and thus the slot
  • the wedge portion 113 not only has the function of clipping the slot wedge (not shown), but also can be used to stop the end of the insulating paper 2 .
  • the insulating paper 2 is accommodated in the conductor groove 1 h in such a manner as to adhere to the peripheral wall of the conductor groove 1 h and the radially inner end portion of the insulating paper 2 is arranged at the involute portion 111 . It should be understood that in some drawings, or in some positions of the drawings, in order to clearly distinguish the insulating paper 2 from the groove wall of the conductor groove 1h, the insulating paper 2 is not tightly attached to the groove wall of the conductor groove 1h. , it is desirable that the insulating paper 2 is attached to the slot wall of the conductor slot 1h.
  • the insulating paper 2 may not be in close contact with the groove wall of the conductor groove 1h. This error does not deviate from the gist of the present invention, and this situation should still be regarded as a within the scope of this application.
  • the conductor 3 is a wave winding.
  • a plurality of conductors 3 are inserted in each conductor slot 1h, and the plurality of conductors 3 can be arranged in the radial direction in the same conductor slot 1h.
  • an assembling method of a stator assembly for a motor includes the following steps:
  • the insulating paper 2 is put into the conductor slot 1h, the insulating paper 2 is bent at the joint of the involute portion 111 and the equidistant portion 112 of the side wall of the conductor slot 1h, and the insulating paper 2
  • the peripheral wall of the conductor slot 1h is attached and the end of the insulating paper 2 is arranged at the involute portion 111;
  • the conductor 3 is inserted into the conductor groove 1 h in the radial direction.
  • FIG. 2C shows a state in which the conductor 3 is ready to be inserted into the conductor slot 1h, wherein the conductor 3 is ready to be inserted into the conductor slot 1h in the direction indicated by the arrow.
  • FIG. 2D shows a state in which the conductor 3 reaches the radial opening of the conductor slot 1h.
  • the insulating paper 2 is also attached to the side wall of the conductor slot 1h accordingly and the ends of the insulating paper 2 are arranged In the involute portion 111, the conductor 3 does not interfere undesiredly with the insulating paper 2 when it enters the radial opening of the conductor slot 1h as shown in FIG. 2D.
  • FIG. 2E shows that the conductor 4 has passed substantially smoothly through the involute portion 111 of the conductor slot 1h, and is about to be inserted into the equidistant portion 112 of the conductor slot 1h.
  • the present invention also provides a motor, which includes the stator assembly for a motor having the above structure, and the motor can also adopt the assembling method of the stator assembly for a motor described above.
  • the sticking of the insulating paper 2 to the peripheral wall of the conductor slot 1h described in the present invention means that the insulating paper 2 can be attached to the peripheral wall of the conductor slot 1h in a non-adhesive manner (including those located on both sides in the circumferential direction). side walls and radially outer top wall). In this case, the insulating paper 2 can be in close contact with the peripheral wall of the conductor groove 1h by its own tension.
  • the distance between the opposite ends near the opening of the insulating paper 2 is slightly larger than the corresponding position of the involute portion 111 of the conductor slot 1h (approximately along the circumference of the iron core). direction) width.
  • the opposite ends near the opening of the insulating paper 2 are slightly compressed to be well attached to the involute portion 111 .
  • the insulating paper 2 is formed at the junction of the involute portion 111 and the equidistant portion 112.
  • the bending shape specifically, the bending position of the bending shape corresponds to the boundary line between the involute portion 111 and the equidistant portion 112 .
  • the boundary line between the involute portion 111 and the equidistant portion 112 is formed into a non-smooth transition shape, it is easy to implement the corresponding bending of the insulating paper 2 .
  • the present invention is not limited thereto.
  • the junction can be designed as a smooth transition, and the insulating paper 2 can be bent correspondingly at the junction, which does not affect the implementation effect of the present invention.
  • the obtuse angle formed between the contour line of the involute portion 111 and the contour line of the equidistant portion 112 in the cross section is 170 degrees, thereby ensuring the performance of the iron core 1 .
  • the obtuse angle formed between the contour line of the involute portion 111 and the contour line of the equidistant portion 112 in the cross section is not less than 150 degrees and will not adversely affect the performance of the iron core 1 .
  • the contour line of the involute portion 111 in the cross section is a straight line, if it is implemented as a curve, it does not affect the implementation effect of the present invention.
  • the present invention is not limited to this, and other sheet insulators that can achieve the same or similar functions can be used.
  • a sheet-shaped insulating resin can be used as the sheet-shaped insulator.
  • stator assembly for a motor further includes a slot wedge formed of an insulating material, and the slot wedge can be inserted into the conductor slot along the axial direction and clamped Connected to the slot wedge to prevent the conductor 3 from coming out of the conductor slot 1h.
  • the conductor groove 1h has been described as having a radial opening that opens radially inward, but the present invention is not limited to this.
  • the conductor grooves 1h may not have radial openings that open radially inward, but may instead have radial openings that open radially outward.
  • the conductor grooves are not formed in the inner peripheral portion of the iron core but are formed in the iron core. peripheral part.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

本发明提供了一种电机用定子组件及其装配方法。该定子组件包括：铁芯(1)，其包括筒状的铁芯主体部和多个铁芯齿部(11)，在周向上相邻的每两个铁芯齿部(11)之间均形成收纳导体(3)用的导体槽(1h)，导体槽(1h)的由铁芯齿部(11)形成的侧壁包括渐开部(111)，渐开部(111)在周向上彼此相对且在朝向导体槽(1h)的径向开口延伸的过程中彼此逐渐远离；以及片状绝缘体(2)，其以贴附导体槽(1h)的周壁的方式收纳于导体槽(1h)中并且片状绝缘体(2)的端部布置于渐开部(111)。这样，在向导体槽中插入导体的过程中导体与片状绝缘体不会发生不期望的干涉。本发明还提供了包括上述电机用定子组件的电机，其具有同样的有益效果。

Description

电机用定子组件及其装配方法以及电机 技术领域
本发明涉及电机领域，更特别地涉及一种用于电机的定子组件及其装配方法，以及包括该定子组件的电机。
背景技术
电机是传统的动力源之一且用途广泛，不仅可以用于大型的工业设备，也可以用于交通工具等。在电机用定子组件中，一般地，在铁芯的导体槽中预先布置有贴附该导体槽的周壁的绝缘纸，然后导体(例如波绕组)经由导体槽的径向开口插入到导体槽中。绝缘纸用于在插入导体过程中保护导体不会损坏，并且在导体插入到导体槽之后该绝缘纸还可以提供导体与铁芯之间的绝缘保护。
参见图1A和图1B，在一种现有的电机用定子组件中，定子组件的铁芯10形成有多个朝向径向内侧开口的导体槽10h，绝缘纸20以贴附各导体槽10h的周壁的方式安装于各导体槽10h中，使导体30从径向内侧穿过导体槽10h的径向开口插入导体槽10h中(如图1A和图1B中的箭头所示)。
在该定子组件中，导体槽10h是直槽，从铁芯10的横截面清晰可见，该导体槽10h呈现为矩形。这种设计会带来如下问题，绝缘纸20在非粘结到导体槽10h的周壁的情况下可能不会特别贴合导体槽10h，在将导体30插入导体槽10h的过程中，导体30可能与绝缘纸20的端部发生干涉并且使绝缘纸20的端部卷曲。如图1B所示，当这种卷曲严重时，甚至会使绝缘纸20的端部发生大幅度弯折，这样绝缘纸20将阻挡导体插入导体槽10h，从而对装配过程产生不利影响，而且对装配完成之后的铁芯10与导体30之间的绝缘性能产生不利影响。
发明内容
为了克服上述现有技术的缺陷而做出了本发明。本发明的一个目的在于提供一种新的电机用定子组件及其装配方法，其与以上背景技术中说明的电机用定子组件相比，能够避免在向导体槽中插入导体的过程中发生绝缘纸与导体彼此干涉的问题，从而消除由于干涉产生的对定子组件的装配和绝缘性能的不利影响。本发明的另一个目的在于提供包括上述电机用定子组件的电机。
为了实现上述发明目的，本发明采用如下的技术方案。
本发明提供了一种如下的电机用定子组件，其包括：
铁芯，所述铁芯包括筒状的铁芯主体部和多个铁芯齿部，所述多个铁芯齿部从所述铁芯主体部沿着所述铁芯主体部的径向突出且沿着所述铁芯主体部的周向排列，在所述周向上相邻的每两个所述铁芯齿部之间均形成收纳导体用的导体槽，所述导体槽的由所述铁芯齿部形成的侧壁包括渐开部，所述渐开部在所述周向上彼此相对且在朝向所述导体槽的径向开口延伸的过程中彼此逐渐远离；以及
片状绝缘体，所述片状绝缘体以贴附所述导体槽的周壁的方式收纳于所述导体槽中并且所述片状绝缘体的端部布置于所述渐开部。
优选地，在沿着所述径向截取的与所述铁芯主体部的中心轴线正交的横截面中，所述渐开部的轮廓线直线状或曲线状地延伸。
更优选地，所述侧壁还包括与所述渐开部邻接的等距部，所述等距部在所述周向上彼此相对且所述等距部之间的在所述周向上的间距在所述径向上始终相等。
更优选地，在沿着所述径向截取的与所述铁芯主体部的中心轴线正交的横截面中，所述渐开部的轮廓线与所述等距部的轮廓线所形成的钝角的角度 不小于150度。
更优选地，所述渐开部与所述等距部之间非平滑过渡或者平滑过渡，所述片状绝缘体在所述渐开部与所述等距部之间的交界部位处形成弯曲形状。
更优选地，所述铁芯齿部在所述导体槽的径向开口处的端部具有向所述导体槽的内部凸出的槽楔部，所述槽楔部与所述渐开部邻接。
更优选地，所述片状绝缘体的端部延伸至所述槽楔部的与所述渐开部邻接的面。
更优选地，所述电机用定子组件包括导体，在所述铁芯形成的各导体槽中分别收纳安装有多个导体。
更优选地，所述导体为波绕组。
本发明还提供了一种根据以上技术方案中任意一项技术方案所述的电机用定子组件的装配方法，所述装配方法包括如下步骤：
将所述片状绝缘体放入所述导体槽中，所述片状绝缘体在所述导体槽的侧壁的渐开部和等距部的接合部位处弯曲，所述片状绝缘体贴附该导体槽的周壁且所述片状绝缘体的端部布置于所述渐开部；以及
沿着所述径向向所述导体槽中插入导体。
本发明还提供了一种如下的电机，其包括根据以上技术方案中任意一项技术方案所述的电机用定子组件。
通过采用上述技术方案，本发明提供了一种电机用定子组件及其装配方法，其在导体槽的侧壁的靠近导体槽的径向开口的部分形成渐开部，并使得片状绝缘体(例如绝缘纸)的端部布置于该渐开部。这样，在片状绝缘体贴附导体槽的周壁的状态下向导体槽中插入导体的过程中，导体与片状绝缘体不会发生不期望的干涉，避免了由于导体与片状绝缘体之间发生干涉对电机用定子组件的装配过程造成的不利影响，同时保证了铁芯和导体之间的良好 的绝缘性能。本发明还提供了包括上述电机用定子组件的电机，其具有同样的有益效果。
附图说明
图1A示出了一种电机用定子组件的部分组装过程，其中导体准备沿着箭头的方向被插入铁芯的导体槽。
图1B示出了图1A中的电机用定子组件的部分组装过程，其中导体位于导体槽的径向开口位置处并且使绝缘纸的端部卷曲。
图2A是示出了根据本发明的一实施方式的电机用定子组件的铁芯的局部结构的示意图。
图2B是示出了在图2A中的铁芯的导体槽中安装绝缘纸之后的状态的示意图。
图2C至图2E是示出了向图2B中的安装有绝缘纸的导体槽中插入导体的过程的示意图，其中导体沿着箭头的方向被插入导体槽中。
附图标记说明
10铁芯 10h 导体槽 20绝缘纸 30导体
1铁芯 1h 导体槽 11铁芯齿部 111渐开部 112等距部 113槽楔部 2绝缘纸 3导体。
具体实施方式
以下参照附图说明本发明的示例性实施方式。需要说明的是，如无特殊说明，“轴向”、“径向”和“周向”分别是指电机用定子组件(铁芯的铁芯主体部)的轴向、径向和周向。
将结合说明书附图说明根据本发明的一实施方式的电机用定子组件的的结构。
(电机用定子组件的结构)
参见图2A至图2E，根据本发明的一实施方式的电机用定子组件包括铁芯1、绝缘纸2和导体3。
具体地，在本实施方式中，铁芯1包括筒状的铁芯主体部和从所述铁芯主体部沿着径向突出且沿着周向排列的多个铁芯齿部11，图2A至图2E只截取了铁芯1的包括一部分铁芯齿部11的局部结构。在相邻的每两个铁芯齿部11之间形成用于收纳绝缘纸2和导体3的导体槽1h，各导体槽1h具有朝向径向内侧开放的径向开口。
导体槽1h的由铁芯齿部11形成的侧壁包括渐开部111和与渐开部111邻接(彼此相邻且相连)的等距部112，渐开部111位于导体槽1h的侧壁的靠近径向开口的部分，渐开部111位于等距部112的径向内侧。导体槽1h的两个相对的侧壁的渐开部111在周向上彼此相对，渐开部111的在周向上的间距朝向导体槽1h的径向开口逐渐增大。等距部112在周向上彼此相对且等距部112之间的在周向上的间距在径向上始终相等。这样，由于导体槽1h的侧壁的靠近径向开口的部位处形成有渐开部111，使得导体槽1h不是如背景技术中的导体槽10h那样的直槽。进而，在将绝缘纸2的端部布置在渐开部111的情况下，导体槽1h在布置绝缘纸2的端部的位置处形成更大的空间，这样有利于导体3插入导体槽1h而不与绝缘纸2的端部发生干涉。
在本实施方式中，渐开部111与等距部112之间非平滑过渡，绝缘纸2在渐开部111与等距部112之间的交界部位(沿着轴向延伸的边界线)处形成弯折形状，从而绝缘纸2能够始终与导体槽1h的侧壁贴附在一起。进一步地，在沿着径向截取的与铁芯主体部的中心轴线正交的横截面中，渐开部111的轮廓线和等距部112的轮廓线均直线状地延伸，并且渐开部111的轮廓线与等距部112的轮廓线所形成的钝角的角度可以为例如170度。这样，即使形成渐开部111也不会对铁芯1的性能造成不利影响。
另外，铁芯齿部11在导体槽1h的径向开口处的端部具有向导体槽1h的内 部凸出的槽楔部113，槽楔部113与渐开部111邻接。槽楔部113的与渐开部111邻接的面在朝向径向内侧倾斜地延伸的同时彼此接近，绝缘纸2的端部延伸至槽楔部113的与渐开部111邻接的面，因而槽楔部113不仅具有卡接槽楔(未示出)的作用，而且还能够用于对绝缘纸2的端部起到止挡作用。
在本实施方式中，绝缘纸2以贴附导体槽1h的周壁的方式收纳于导体槽1h中并且绝缘纸2的径向内侧端部布置于渐开部111处。应当理解，在部分附图中，或者在附图的部分位置，为了清楚地区分绝缘纸2和导体槽1h的槽壁，绝缘纸2并未紧贴到导体槽1h的槽壁，本申请中，期望绝缘纸2贴附到导体槽1h的槽壁。而且，由于制造或装配误差等，在部分区域，绝缘纸2可能不会紧贴到导体槽1h的槽壁，这种误差并不会偏离本发明的主旨，这种情况仍应被视为在本申请的范围内。
在本实施方式中，导体3为波绕组。在每一个导体槽1h中插入多个导体3，在同一个导体槽1h中多个导体3可以在径向上排列。
以下结合说明书附图说明根据本发明的一实施方式的电机用定子组件的装配方法。
(定子组件的装配方法)
具体地，根据本发明的一实施方式的电机用定子组件的装配方法包括如下步骤：
如图2A和图2B所示，将绝缘纸2放入导体槽1h中，绝缘纸2在导体槽1h的侧壁的渐开部111和等距部112的接合部位处弯折，绝缘纸2贴附该导体槽1h的周壁且绝缘纸2的端部布置于渐开部111处；以及
如图2C至图2E所示，沿着径向向导体槽1h中插入导体3。
在向导体槽1h中插入导体3的过程中，图2C示出了导体3准备插入导体槽1h的状态，其中导体3准备沿着箭头标识的方向插入导体槽1h中。图2D示出了导体3到达导体槽1h的径向开口处的状态。从该图可以清晰地看出，因为本发明的导体槽1h的侧壁形成有渐开部111的结构，绝缘纸2也相应地贴附导 体槽1h的侧壁且绝缘纸2的端部布置于渐开部111，这样导体3在如图2D所示地进入导体槽1h的径向开口时不会与绝缘纸2发生不期望的干涉。图2E示出了导体4已经基本顺利通过导体槽1h的渐开部111，即将插入到导体槽1h的等距部112。这样，因为导体3已经远离绝缘纸2的端部，所以即使导体槽1h在等距部112处的空间变小而导致绝缘纸2可能与导体3接触，也不会使绝缘纸2发生不期望的卷曲。
进一步地，本发明还提供了一种电机，其包括具有如上结构的电机用定子组件，此外该电机还可以采用以上说明的电机用定子组件的装配方法。
当然，本发明不限于上述实施方式，本领域技术人员在本发明的教导下可以对本发明的上述实施方式做出各种变型，而不脱离本发明的范围。另外，进行以下说明。
(i)需要说明的是，本发明中所说明的绝缘纸2贴附导体槽1h的周壁表示绝缘纸2可以采用非粘结的方式紧贴在导体槽1h的周壁(包括位于周向两侧的侧壁和位于径向外侧的顶壁)。在这种情况下，绝缘纸2可以利用自身的张力紧贴在导体槽1h的周壁上。
例如，在将绝缘纸2插入导体槽1h之前，绝缘纸2的开口附近的相对的端部之间的距离略大于导体槽1h的渐开部111的对应位置的(大致沿着铁芯的周向的)宽度。在将绝缘纸2插入导体槽1h之后，绝缘纸2的开口附近的相对的端部略微被压缩而良好地贴附到渐开部111。
(ii)如在以上的具体实施方式中说明地，为了使得绝缘纸2更好地贴附于导体槽1h的侧壁，绝缘纸2在渐开部111和等距部112的交界部位处形成弯折形状，具体地该弯折形状的弯折位置对应渐开部111与等距部112的边界线。在以上的具体实施方式中，由于渐开部111和等距部112之间的边界线形成为非平滑过渡的形状，容易实施对应的绝缘纸2的弯折。
进一步地，虽然在以上的具体实施方式中说明了在渐开部111和等距部112的交界部位非平滑过渡，但是本发明不限于此。可以将该交界部位设计 为平滑过渡，绝缘纸2可以在该交接部位处进行对应的弯曲，其并不会影响本发明的实施效果。
(iii)如在以上的具体实施方式中说明地，在横截面中渐开部111的轮廓线与等距部112的轮廓线之间形成的钝角为170度，从而保证铁芯1的性能。试验表明，在横截面中渐开部111的轮廓线与等距部112的轮廓线之间形成的钝角不小于150度就不会对铁芯1的性能产生不利影响。
进一步地，虽然在本发明的具体实施方式中说明了渐开部111在横截面中的轮廓线为直线，但是如果实施为曲线也是可以的，并不影响本发明的实施效果。
(iv)虽然在以上的具体实施方式中说明了采用绝缘纸2作为片状绝缘体，但是本发明不限于此，可以采用其它的能够实现相同或者类似功能的片状绝缘体。例如，可以采用片状绝缘树脂作为片状绝缘体。
(v)虽然在以上的具体实施方式中没有明确说明，但是可以理解，根据本发明的电机用定子组件还包括采用绝缘材料形成的槽楔，槽楔可以沿着轴向插入导体槽中并且卡接于槽楔部，从而防止导体3从导体槽1h脱出。
(vi)虽然在以上的具体实施方式中说明了导体槽1h具有朝向径向内侧开放的径向开口，但是本发明不限于此。导体槽1h可以不形成朝向径向内侧开放的径向开口，代替地形成有朝向径向外侧开放的径向开口，换言之，导体槽不是形成于铁芯的内周部而是形成于铁芯的外周部。

Claims (11)

  1. 一种电机用定子组件，其包括：
    铁芯(1)，所述铁芯(1)包括筒状的铁芯主体部和多个铁芯齿部(11)，所述多个铁芯齿部(11)从所述铁芯主体部沿着所述铁芯主体部的径向突出且沿着所述铁芯主体部的周向排列，在所述周向上相邻的每两个所述铁芯齿部(11)之间均形成收纳导体(3)用的导体槽(1h)，所述导体槽(1h)的由所述铁芯齿部(11)形成的侧壁包括渐开部(111)，所述渐开部(111)在所述周向上彼此相对且在朝向所述导体槽(1h)的径向开口延伸的过程中彼此逐渐远离；以及
    片状绝缘体(2)，所述片状绝缘体(2)以贴附所述导体槽(1h)的周壁的方式收纳于所述导体槽(1h)中并且所述片状绝缘体(2)的端部布置于所述渐开部(111)。
  2. 根据权利要求1所述的电机用定子组件，其特征在于，在沿着所述径向截取的与所述铁芯主体部的中心轴线正交的横截面中，所述渐开部(111)的轮廓线直线状或曲线状地延伸。
  3. 根据权利要求1或2所述的电机用定子组件，其特征在于，所述侧壁还包括与所述渐开部(111)邻接的等距部(112)，所述等距部(112)在所述周向上彼此相对且所述等距部(112)之间的在所述周向上的间距在所述径向上始终相等。
  4. 根据权利要求3所述的电机用定子组件，其特征在于，在沿着所述径向截取的与所述铁芯主体部的中心轴线正交的横截面中，所述渐开部(111)的轮廓线与所述等距部(112)的轮廓线所形成的钝角的角度不小于150度。
  5. 根据权利要求3或4所述的电机用定子组件，其特征在于，所述渐开部(111)与所述等距部(112)之间非平滑过渡或者平滑过渡，所述片状绝缘体(2)在所述渐开部(111)与所述等距部(112)之间的交界部位处形成 弯曲形状。
  6. 根据权利要求1至5中任一项所述的电机用定子组件，其特征在于，所述铁芯齿部(11)在所述导体槽(1h)的径向开口处的端部具有向所述导体槽(1h)的内部凸出的槽楔部(113)，所述槽楔部(113)与所述渐开部(111)邻接。
  7. 根据权利要求6所述的电机用定子组件，其特征在于，所述片状绝缘体(2)的端部延伸至所述槽楔部(113)的与所述渐开部(111)邻接的面。
  8. 根据权利要求1至7中任一项所述的电机用定子组件，其特征在于，所述电机用定子组件包括导体(3)，在所述铁芯(1)形成的各导体槽(1h)中分别收纳安装有多个导体(3)。
  9. 根据权利要求8所述的电机用定子组件，其特征在于，所述导体(3)为波绕组。
  10. 一种根据权利要求1至9中任一项所述的电机用定子组件的装配方法，所述装配方法包括如下步骤：
    将所述片状绝缘体(2)放入所述导体槽(1h)中，所述片状绝缘体(2)在所述导体槽(1h)的侧壁的渐开部(111)和等距部(112)的接合部位处弯曲，所述片状绝缘体(2)贴附该导体槽(1h)的周壁且所述片状绝缘体(2)的端部布置于所述渐开部(111)；以及
    沿着所述径向向所述导体槽(1h)中插入导体(3)。
  11. 一种电机，其包括根据权利要求1至9中任一项所述的电机用定子组件。
PCT/CN2021/086586 2021-04-12 2021-04-12 电机用定子组件及其装配方法以及电机 WO2022217424A1 (zh)

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