Winding assembly for motor, motor and vehicle-mounted compressor

Abstract

The invention relates to a winding assembly for a motor, the motor and a vehicle-mounted compressor. The winding assembly includes: a core including an annular portion and a plurality of tooth portions; a winding wire having a winding wire end portion and wound on each tooth portion of the core body; the insulating cover at least partially covers the tooth part; the connecting plate is fixed above the insulating cover, and a through hole is formed in the connecting plate; the bus bars are fixed in the connecting plate, each bus bar comprises a second end and a plurality of first ends, the peripheral space of the first ends is not sealed by the connecting plate, and the winding end part penetrates through the through hole and is electrically connected with the first ends; and the insulating glue accommodating piece is arranged above the connecting plate and is provided with an accommodating cavity surrounding the peripheral space of the first end, insulating glue is poured into the accommodating cavity, and the insulating glue seals the joint of the first end of the bus bar and the winding end part. The winding assembly for the motor has the advantages of being high in integration level, high in insulativity, high in installation efficiency and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, and more particularly, to a winding assembly for an electric machine, an electric machine provided with the winding assembly, and a vehicle-mounted compressor configured with the electric machine. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the context of the disclosure. To the extent that specific experiments, aspects, examples or the like that are described in this section are already prior art as of the filing date of this disclosure and thus not accorded any priority, such description is included solely to provide context for the disclosure, and is not intended to limit the disclosure in any way.

[0003] With the development and popularization of vehicles and the gradual maturity of fast charging technology, the input voltage of the electric machine on the vehicle is getting higher and higher, and higher requirements are put forward for the safety performance of the electric machine. As for the vehicle-mounted compressor, the electric machine thereof is in the environment of refrigerant and oil, and these refrigerant and oil have certain conductivity, which puts higher requirements on the insulation performance of the electric machine.

[0004] Application Content

[0005] According to the present application, a winding assembly for an electric machine is provided, the electric machine comprising an electric machine rotating shaft, the winding assembly comprising:

[0006] a core body comprising an annular portion arranged around the center of the electric machine rotating shaft and a plurality of tooth portions, each of the tooth portions extending radially from the annular portion;

[0007] a winding wire having winding wire ends and wound on each of the tooth portions of the core body to form a winding unit;

[0008] an insulation cover at least partially covering the tooth portions to isolate the winding wire and the core body;

[0009] a connecting plate made of plastic and fixed above the insulation cover, wherein the connecting plate is provided with a through hole;

[0010] a bus bar fixed in the connecting plate, each of the bus bars comprising a second end for maintaining electrical connection with an electrical connection terminal and a plurality of first ends, the connecting plate not enclosing the peripheral space of the first ends, the winding wire ends being electrically connected with the first ends through the through hole; and

[0011] an insulation glue containing member installed above the connecting plate and provided with a containing cavity surrounding the peripheral space of the first ends, the containing cavity being filled with insulation glue, the insulation glue enclosing the connection between the first ends of the bus bars and the winding wire ends.

[0012] Optionally, in the winding assembly as described above, the cross-sectional area of the through hole of the connecting plate gradually narrows along the direction in which the wire end portion is inserted; and / or

[0013] The bus bar includes a portion fixed in the connecting plate by means of plastic packaging, the first end is provided with a bent section so that the first end has a circular opening or a V-shaped opening away from the connecting plate, and each of the tooth portions extends radially inward from the inner side of the annular portion.

[0014] Optionally, in the winding assembly as described above, the bus bar includes a first bus bar, a second bus bar, a third bus bar and a fourth bus bar, wherein the first end of the first bus bar and the first end of the second bus bar are arranged in a symmetrical manner around the center of the connecting plate and are both arranged in a first direction on the plane where the connecting plate is located, and the first end of the third bus bar and the first end of the fourth bus bar are arranged in a symmetrical manner around the center of the connecting plate and are both arranged in a second direction on the plane where the connecting plate is located, wherein the first direction is perpendicular to the second direction.

[0015] Optionally, in the winding assembly as described above, the winding assembly further includes a power terminal seat accommodating the power terminal and having a base and a cover matched with the base in an insulating manner, the base being located between the motor shaft and the connecting plate and between the motor shaft and the insulating glue accommodating member.

[0016] Optionally, in the winding assembly as described above, the base of the power terminal seat is provided with a first sealing portion, the first sealing portion is provided with a channel for accommodating insulating glue, and the cover is provided with a second sealing portion for extending to the channel, wherein the first sealing portion and the second sealing portion are in compression fit.

[0017] Optionally, in the winding assembly as described above, the first end of the bus bar is connected to the wire end portion by means of laser welding; and / or

[0018] The circumferential inner side of the connecting plate is further provided with a web, and the web is provided with at least three positioning holes for grabbing the connecting plate; and / or

[0019] The insulating glue accommodating member includes a base plate and a surrounding plate extending outward from the side of the base plate away from the connecting plate, wherein the insulating glue accommodating member is made of plastic by integral molding.

[0020] Optionally, in the winding assembly as described above, the insulating cover includes an upper insulating member and a lower insulating member, wherein the upper insulating member and the lower insulating member are interlocked to form an overlapping area between the upper insulating member and the lower insulating member, the overlapping area being continuously arranged along the circumference of each of the teeth.

[0021] Optionally, in the winding assembly as described above, in the overlapping area, the upper insulator is located outside or inside the lower insulator, and the two are in tight, sealed contact to fully insulate the winding from the core. A fixing pin is provided at the top of the upper insulator, and the connecting plate is fixed to the upper insulator by thermal riveting via the fixing pin. The fixing pin is provided with interference ribs for interference fit; and / or

[0022] The top of the upper insulating member is provided with two grooves, and the two ends of the winding on the insulating cover are respectively fixed to the grooves and extend upward from the grooves parallel to the fixing pin, with the fixing pin located between the two ends of the winding.

[0023] In addition, according to this application, an electric motor is also provided, the electric motor being provided with the winding assembly described above.

[0024] In addition, according to this application, a vehicle-mounted compressor is also provided, which is equipped with the aforementioned motor.

[0025] It is understood that the products according to the embodiments of this application provide better insulation and are highly advantageous for automated installation. Attached Figure Description

[0026] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0027] Figure 1 An exemplary schematic diagram of the structure of the winding assembly for an electric motor disclosed in this application when it is not filled with insulating adhesive is shown;

[0028] Figure 2 An exemplary schematic diagram of the core structure of a winding assembly for an electric motor disclosed in this application is shown;

[0029] Figure 3 An exemplary schematic diagram of the structure of a connection plate for a winding assembly of an electric motor disclosed in this application is shown;

[0030] Figure 4A partial cross-sectional schematic diagram of the winding assembly for an electric motor disclosed in this application is shown exemplarily with the insulating adhesive accommodator omitted;

[0031] Figure 5 An exemplary partial cross-sectional schematic diagram of a winding assembly for an electric motor disclosed in this application when filled with insulating adhesive is shown.

[0032] Figure 6 An exemplary schematic diagram of the structure of a winding assembly for an electric motor disclosed in this application when filled with insulating adhesive is shown;

[0033] Figure 7 An exemplary schematic diagram of the structure of an insulating adhesive accommodator for a motor winding assembly disclosed in this application is shown.

[0034] Figure 8 An exemplary schematic diagram of the winding unit of the winding assembly for an electric motor disclosed in this application is shown when the winding is omitted;

[0035] Figure 9 An exemplary schematic diagram of the winding unit of the winding assembly for an electric motor disclosed in this application during winding is shown.

[0036] Figure 10 An exemplary plan view is shown of the upper insulating member of an insulating cover for a winding assembly of an electric motor disclosed in this application;

[0037] Figure 11 An exemplary side view of the upper insulating member of an insulating cover for a winding assembly of an electric motor disclosed in this application is shown.

[0038] Figure 12 An exemplary bottom view of the lower insulation member of the insulating cover for a winding assembly of an electric motor disclosed in this application is shown; and

[0039] Figure 13 An exemplary side view of the lower insulating member of an insulating cover for a winding assembly of an electric motor disclosed in this application is shown. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. First, it should be noted that the directional terms such as up, down, left, right, front, back, inner, outer, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0041] Figure 1 A schematic diagram of a winding assembly for an electric motor disclosed in this application is shown. The motor includes a motor shaft (not shown). The winding assembly 100 consists of a core 170, windings 180, an insulating cover 160, a connecting plate 110, a busbar 120, and an insulating adhesive container 130, etc. Figure 2 As clearly seen, the core 170 includes an annular portion 171 and a plurality of teeth 172 disposed around the center of the motor shaft, each tooth 172 extending radially from the annular portion 171. The winding 180 has a winding end 180a and is wound around each tooth 172 of the core 170 to form a winding unit. The insulating cover 160 at least partially covers the teeth 172 to isolate the winding 180 and the core 170. The connecting plate 110 is annular in shape and made of plastic, and is fixed above the insulating cover 160, wherein the connecting plate 110 is provided with a through hole 111. The busbar 120 is fixed within the connecting plate 110. Each busbar 120 has a first end and a second end. The connecting plate 110 does not enclose the periphery of the first end. The winding end 180a passes through the through hole 111 and is electrically connected to the first end. For example, the first end of the busbar 120 and the winding end 180a are connected by laser welding or other methods. The second end of the busbar 120 is used to maintain an electrical connection with the power terminal 150, which is electrically connected to the pins of the electronic control unit (not shown). The insulating adhesive container 130 is installed above the connecting plate 110 and has a receiving cavity 131 surrounding the peripheral space of the first end. The receiving cavity 131 is filled with insulating adhesive S, such as epoxy resin. After the insulating adhesive S solidifies, it covers the fixed connection between the first end of the busbar 120 and the winding end 180a, thereby sealing the connection between the first end of the busbar 120 and the winding end 180a. This completely isolates the fixed connection from the refrigerant and oil present in the motor to achieve strong insulation. Moreover, this installation process can be performed automatically and is suitable for automated production.

[0042] To facilitate the insertion of the winding end 180a into the connecting plate 110, the cross-sectional area of ​​the through hole 111 of the connecting plate 110 gradually narrows along the insertion direction of the winding end 180a. For example, the through hole 111 can adopt a tapered design similar to a funnel shape.

[0043] In such Figures 1 to 4In the illustrated embodiment, the busbar 120 includes a portion fixed within the connecting plate 110 by plastic coating. The first end has a stepped, bent section such that it has a circular opening or a V-shaped opening away from the connecting plate 110, facilitating connection with the winding end 180a. Each tooth 172 extends radially inward from the inner side of the annular portion 171, and the first end extends at least partially radially outward from within the connecting plate 110.

[0044] In other optional embodiments, in conjunction with the above embodiments, the busbar 120 includes a first busbar 121, a second busbar 122, a third busbar 123, and a fourth busbar 124. The first ends 121a of the first busbar 121 and 122a of the second busbar 122 are arranged symmetrically around the center of the connecting plate 110 and are both positioned along a first direction on the plane of the connecting plate 110 (i.e., the first ends 121a of the first busbar 121 and 122a of the second busbar 122 are parallel to each other). The first ends 123a of the third busbar 123 and 124a of the fourth busbar 124 are arranged symmetrically around the center of the connecting plate 110 and are both positioned along a second direction on the plane of the connecting plate 110 (i.e., the first ends 123a of the third busbar 123 and 124a of the fourth busbar 124 are parallel to each other). The first direction is perpendicular to the second direction. The above design facilitates the demolding of the connecting plate 110 and the busbar 120 as a single unit from the circumferential direction.

[0045] Continue to refer to Figures 5 to 7 The insulating adhesive container 130 includes a substrate 132 and a surrounding plate 133 extending outward from the side of the substrate 132 away from the connecting plate 110, for forming a space for receiving insulating adhesive. For ease of manufacture, the insulating adhesive container 130 may be integrally molded from plastic.

[0046] It is easy to understand that a web plate 112 is also provided on the inner circumferential side of the connecting plate 110. The web plate 112 is provided with at least three positioning holes 113 for gripping the connecting plate 110, so that the robot arm can position the connecting plate 110 through the positioning holes 113, thereby realizing automated production and improving installation efficiency.

[0047] like Figure 3 and Figure 6As shown, the winding assembly 100 further includes a terminal block 140 that accommodates the terminal block 150, and has a base 141 and a cover 142 that is insulated from the base 141. The base 141 is located between the motor shaft and the connecting plate 110 and between the motor shaft and the insulating adhesive container 130. Specifically, the base 141 of the terminal block 140 has a first sealing portion with a channel 143 for accommodating insulating adhesive, and the cover 142 has a second sealing portion extending to the channel 143. When the first sealing portion is filled with insulating adhesive, the first sealing portion and the second sealing portion are pressed together to achieve a good sealing / insulation effect. Both the first sealing portion and the second sealing portion can be made of plastic so that insulation is achieved by sealing with insulating adhesive.

[0048] like Figures 8 to 13 As shown, the insulating cover 160 includes an upper insulating member 161 and a lower insulating member 162. The upper insulating member 161 and the lower insulating member 162 are respectively provided with an outer end A, an inner end B, and a spacer body C connecting the inner end B and the outer end A at the opposite end face of each tooth 172 of the core 170. One of the upper insulating member 161 and the lower insulating member 162 is provided with a male end protrusion, and the other is provided with a female end cavity, so that the upper insulating member 161 and the lower insulating member 162 are inserted and fitted together, thereby forming an overlapping area in the circumferential direction of the upper insulating member 161 and the lower insulating member 162. The overlapping area is continuously arranged along the circumferential direction of each tooth 172. The upper insulating member 161 and the lower insulating member 162 can at least partially cover each tooth 172 to provide strong insulation, thereby preventing breakdown / creep phenomena between the winding 180 and the core 170 due to excessively close electrical clearance / creep distance.

[0049] Furthermore, in the overlapping area, the upper insulating member 161 is located outside or inside the lower insulating member 162, and the two are in tight, sealed contact to fully insulate the winding 180 from the core 170. A fixing pin 163 is provided on the top of the upper insulating member 161, and the connecting plate 110 is fixed to the upper insulating member 161 by thermal riveting via the fixing pin 163. The fixing pin 163 is provided with an interference rib 164 for interference fit. Additionally, the top of the upper insulating member 161 is provided with two grooves 165, and the two winding ends 180a of the winding 180 on the insulating cover 160 are respectively fixed to the grooves 165 and extend upwards from the grooves 165 parallel to the fixing pin 163. The fixing pin 163 is located between the two winding ends 180a.

[0050] Furthermore, according to this application, a motor is also provided, which may be a three-phase motor, comprising a U-phase, a V-phase, and a W-phase. The motor is provided with the aforementioned winding assembly 100.

[0051] Additionally, this application provides an on-board compressor equipped with the aforementioned motor and electronic control unit. The motor is located within a motor housing (not shown) of the on-board compressor and is driven and controlled by the electronic control unit. During operation, the motor housing contains a mixture of refrigerant and oil.

[0052] The foregoing has provided several specific embodiments to illustrate in detail the winding assembly for an electric motor, the electric motor equipped with the winding assembly, and the vehicle-mounted compressor equipped with the electric motor. These examples are for illustrative purposes only and are not intended to limit the scope of the present application. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions should fall within the scope of this application and be defined by the claims of this application.

Claims

1. A winding assembly for an electric motor, the motor including a motor shaft, characterized in that, The winding assembly (100) includes: The core (170) includes an annular portion (171) disposed around the center of the motor shaft and a plurality of teeth (172), each of the teeth (172) extending radially from the annular portion (171); A winding (180) having a winding end (180a) and wound around each of the teeth (172) of the core (170) to form a winding unit; An insulating cover (160) at least partially covers the teeth (172) to isolate the winding (180) and the core (170); A connecting plate (110), which is made of plastic, is fixed above the insulating cover (160), wherein the connecting plate (110) is provided with a through hole (111); Busbars (120) fixed within the connecting plate (110), each busbar (120) including a second end for maintaining an electrical connection with a power terminal (150) and a plurality of first ends, the connecting plate (110) not enclosing the peripheral space of the first ends, the winding end (180a) passing through the through hole (111) and electrically connected to the first end; and An insulating adhesive container (130) is mounted above the connecting plate (110) and has a receiving cavity (131) surrounding the peripheral space of the first end, in which insulating adhesive is filled and seals the connection between the first end of the busbar (120) and the winding end (180a).

2. The winding assembly according to claim 1, characterized in that, The cross-sectional area of ​​the through hole (111) of the connecting plate (110) gradually narrows along the direction in which the winding end (180a) is inserted; and / or The busbar (120) includes a portion fixed inside the connecting plate (110) by plastic coating. The first end is provided with a bent section such that the first end has a circular opening or a V-shaped opening away from the connecting plate (110). Each tooth (172) extends radially inward from the inside of the annular portion (171). The first end extends at least partially radially outward from inside the connecting plate (110).

3. The winding assembly according to claim 2, characterized in that, The busbar (120) includes a first busbar (121), a second busbar (122), a third busbar (123), and a fourth busbar (124). The first end (121a) of the first busbar (121) and the first end (122a) of the second busbar (122) are arranged symmetrically around the center of the connecting plate (110) and are both arranged along a first direction on the plane of the connecting plate (110). The first end (123a) of the third busbar (123) and the first end (124a) of the fourth busbar (124) are arranged symmetrically around the center of the connecting plate (110) and are both arranged along a second direction on the plane of the connecting plate (110). The first direction is perpendicular to the second direction.

4. The winding assembly according to any one of claims 1-3, characterized in that, The winding assembly (100) further includes a terminal block (140) for receiving the terminal block (150) and has a base (141) and a cover (142) that is insulatedly matched with the base (141), the base (141) being located between the motor shaft and the connecting plate (110) and between the motor shaft and the insulating adhesive receptacle (130).

5. The winding assembly according to claim 4, characterized in that, The base (141) of the electrical terminal block (140) is provided with a first sealing part, the first sealing part is provided with a channel (143) for accommodating insulating adhesive, and the cover (142) is provided with a second sealing part for extending to the channel (143), wherein the first sealing part and the second sealing part are pressed together.

6. The winding assembly according to any one of claims 1-3, characterized in that, The first end of the busbar (120) is connected to the winding end (180a) by laser welding; and / or The connecting plate (110) is further provided with a web plate (112) on its inner circumferential side, and the web plate (112) is provided with at least three positioning holes (113) for gripping the connecting plate (110); and / or The insulating adhesive container (130) includes a substrate (132) and a surrounding plate (133) extending outward from the side of the substrate (132) away from the connecting plate (110), wherein the insulating adhesive container (130) is integrally molded from plastic.

7. The winding assembly according to any one of claims 1-3, characterized in that, The insulating cover (160) includes an upper insulating member (161) and a lower insulating member (162), wherein the upper insulating member (161) and the lower insulating member (162) are interlocked to form an overlapping area between the upper insulating member (161) and the lower insulating member (162), the overlapping area being continuously arranged along the circumference of each tooth (172).

8. The winding assembly according to claim 7, characterized in that, In the overlapping area, the upper insulating member (161) is located outside or inside the lower insulating member (162), and the two are in tight, sealed contact to fully insulate the winding (180) from the core (170). A fixing pin (163) is provided on the top of the upper insulating member (161), and the connecting plate (110) is fixed to the upper insulating member (161) by heat riveting through the fixing pin (163). The fixing pin (163) is provided with an interference rib (164) for interference fit; and / or The top of the upper insulating member (161) is provided with two grooves (165). The two ends (180a) of the winding (180) on the insulating cover (160) are respectively fixed in the grooves (165) and extend upward from the grooves (165) parallel to the fixing pin (163). The fixing pin (163) is located between the two ends (180a).

9. An electric motor, characterized in that, The motor is provided with a winding assembly (100) according to any one of claims 1-8.

10. A vehicle-mounted compressor, characterized in that, The vehicle-mounted compressor is equipped with the motor according to claim 9.

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