Flat wire centralized winding motor stator

Abstract

A flat wire centralized winding motor stator comprises a stator core, winding coils, non-magnetic slot wedges, busbars and three-phase wire inlets. The stator core comprises an annular cylinder and stator teeth, the winding coil is arranged on the stator teeth, and the end part of the winding coil extends out of the end surface of one end of the stator core and is connected with the three-phase wire inlet through the busbar; the non-magnetic slot wedge is inserted between two adjacent stator teeth, two ends of the non-magnetic slot wedge are located on adjacent side walls of the stator teeth, and the busbar comprises a U-phase copper bar, a V-phase copper bar, a W-phase copper bar, a neutral copper bar and an insulating plate arranged between adjacent copper bars which are stacked in the axial direction of the stator core. The flat wire centralized winding motor stator has a shorter end part size and a simpler process flow, which is very accordant with the application requirements of commercial vehicles; and the flat wire centralized winding motor is adopted, so that the development period of the motor can be greatly shortened, and meanwhile, the production line investment is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the field of motor technology, and in particular to a flat wire concentrated winding motor stator. Background Art

[0002] In the existing technology, with the increasing use of electric vehicles, drive motor technology has developed rapidly. In the field of commercial vehicles and non-road vehicles, electrification transformation is also underway. Currently, there are multiple technical routes coexisting, among which the hybrid route has attracted attention for its lower cost of modifying the vehicle powertrain. This technical route usually installs the motor inside the engine or gearbox, or installs the entire motor module between the engine and the gearbox, which has very strict requirements on the axial space of the motor; however, considering the difficulty in designing and developing flat wire distributed winding motors and the huge investment in production lines, it cannot meet the requirements of space and cost, so flat wire centralized winding motors are more in line with the application needs of commercial vehicles.

[0003] To address the above problems, no effective solution has been proposed yet.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0005] The purpose of this specification is to provide a flat wire concentrated winding motor stator to solve the above problems.

[0006] This specification provides a flat wire concentrated winding motor stator, including:

[0007] Stator core, winding coils, non-magnetic slot wedges, busbars and three-phase line inlets;

[0008] The stator core comprises an annular cylinder and a plurality of stator teeth arranged on the inner wall of the annular cylinder, one end of the stator tooth is located on the inner wall of the stator core, and the other end of the stator tooth extends toward the central axis direction of the stator core, the winding coil is arranged on the stator tooth, and comprises a plurality of groups of flat wire coils wound on the outer side of a single stator tooth, and the end of the winding coil extends out of the end surface of one end of the stator core and is connected to the bus bar; the non-magnetic slot wedge is inserted between two adjacent stator teeth and the magnetic slot wedge The two ends are located at the adjacent side walls of the stator teeth, the non-magnetic slot wedges are arranged at the two ends of the winding coil away from the stator core and make the winding coil unable to separate from the stator teeth; the busbar is annular and located on the end surface of the stator core extending out of the end of the winding coil, and the busbar includes U-phase copper bar, V-phase copper bar, W-phase copper bar and neutral copper bar stacked along the axial direction of the stator core and an insulating plate arranged between adjacent copper bars; the busbar connects the ends of the winding coil and the three-phase line inlet.

[0009] Preferably, the flat wire concentrated winding motor stator further comprises a coil winding bracket arranged on the end face of the stator tooth, the coil winding bracket is located on the side of the winding coil close to the stator tooth, and the winding coil is positioned on the stator tooth in the axial direction through the coil winding bracket.

[0010] Preferably, the flat wire concentrated winding motor stator further comprises insulating paper, which is arranged along the axis of the winding coil and wraps the side walls of the winding coil respectively, and the insulating paper insulates the contact portion between the winding coil and the stator teeth.

[0011] Furthermore, the winding coil may be wound as a single coil and adjacent coils may be connected via connecting copper bars so that the components form an electrical path.

[0012] Furthermore, the winding coil may be a multi-coil winding coil wound around the stator teeth.

[0013] Furthermore, two ends of the stator core are filled with epoxy resin glue, so that the coil winding ends and the busbar are wrapped in the epoxy resin glue.

[0014] Furthermore, the busbar is provided with two positioning pins along a circumferential direction, and the positioning pins are used to fix the busbar.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model can shorten the size of the motor end by arranging a centralized armature winding, meet the more stringent axial space requirements on the market, and can greatly shorten the development cycle of the motor, while significantly reducing the production line investment.

[0017] 2. The utility model shortens the size of the end and reduces insulation risk by arranging a busbar to connect the winding coil and the three-phase line inlet.

[0018] 3. The utility model makes it easy to assemble the stator and the coil by setting the adjacent stator teeth in the stator core to be fully open, thus avoiding various problems caused by the circumferential segment assembly error of the stator.

[0019] 4. The utility model improves the insulation performance of the motor by encapsulating the coil winding ends and the busbars on both sides of the stator core with epoxy resin glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is an assembly diagram of the stator of a flat wire concentrated winding motor provided in the embodiment of this specification;

[0022] Figure 2 It is a busbar structure diagram of a stator of a flat wire concentrated winding motor provided in an embodiment of this specification;

[0023] Figure 3 It is a busbar assembly diagram of a flat wire concentrated winding motor stator provided in an embodiment of this specification;

[0024] Figure 4 It is a schematic diagram of the connection of the winding coil provided in the embodiment of this specification;

[0025] Figure 5 It is a single winding schematic diagram of a winding coil provided in an embodiment of this specification;

[0026] Figure 6 This is an end potting diagram of a flat wire concentrated winding motor stator provided in an embodiment of this specification;

[0027] Figure 7 This is a partial diagram of a flat wire concentrated winding motor stator provided in an embodiment of this specification.

[0028] In the figure: 1. stator core; 2. busbar; 21. U-phase copper bar; 22. V-phase copper bar; 23. W-phase copper bar; 24. neutral copper bar; 25. insulation plate; 26. positioning pin; 3. non-magnetic slot wedge; 4. insulation paper; 5. three-phase line inlet; 6. coil winding bracket; 7. coil winding; 8. connecting copper bar; 9. epoxy resin glue. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0030] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0031] Reference Figures 1 to 7 As shown, the embodiment of the present application provides a flat wire concentrated winding motor stator, comprising:

[0032] Stator core 1, winding coil, non-magnetic slot wedge 3, bus bar 2 and three-phase line inlet 5;

[0033] The stator core 1 includes an annular cylinder and a plurality of stator teeth arranged on the inner wall of the annular cylinder, one end of the stator tooth is located on the inner wall of the stator core 1, and the other end of the stator tooth extends toward the central axis direction of the stator core 1. The winding coil is arranged on the stator tooth, including a plurality of groups of flat wire coils wound on the outer side of a single stator tooth, and the end of the winding coil extends out of the end surface of one end of the stator core 1 and is connected to the bus 2. The non-magnetic slot wedge 3 is inserted between two adjacent stator teeth and the two ends of the magnetic slot wedge are located on the adjacent side walls of the stator teeth. The non-magnetic slot wedge 3 is arranged at the two ends of the winding coil away from the stator core 1 so that the winding coil cannot be separated from the stator tooth. The busbar 2 is annular and located on the end surface of the stator core 1 extending out of the end of the winding coil. The busbar 2 includes a U-phase copper bar 21, a V-phase copper bar 22, a W-phase copper bar 23 and a neutral copper bar 24 stacked axially along the stator core 1, and an insulating plate 25 arranged between adjacent copper bars; the busbar 2 connects the end of the winding coil and the three-phase line inlet 5.

[0034] Preferably, the flat wire concentrated winding motor stator also includes a coil winding bracket 6 arranged on the end face of the stator tooth, the coil winding bracket 6 is located on the side of the winding coil close to the stator tooth, and the winding coil is positioned on the stator tooth in the axial direction through the coil winding bracket 6.

[0035] Preferably, the flat wire concentrated winding motor stator further comprises insulating paper 4, which is arranged along the axis of the winding coil and wraps the side walls of the winding coil respectively, and the insulating paper 4 insulates the contact portion between the winding coil and the stator teeth.

[0036] In one embodiment, by Figure 4 The winding coil 7 shown is a multi-coil winding coil wound on the stator teeth, and the multi-coil winding coil is composed of a flat wire continuously wound around a plurality of stator teeth. After the side wall of the winding coil is wrapped with insulating paper 4, it is axially positioned on the stator tooth by the coil winding bracket 6 arranged on the end face of the stator tooth. At this time, the winding coil is wrapped around the side wall of the stator tooth. The non-magnetic slot wedge 3 is inserted into the slot between the adjacent stator teeth where the winding coil is arranged, and the non-magnetic slot wedge 3 plays a role in closing the slot to prevent the winding coil from falling out.

[0037] Traditional round wire motors generally directly lead the winding coil ends to the three-phase inlet 5 and fix the winding ends by binding, which will increase the height of the coil ends and the insulation risk. Therefore, this application sets Figure 2 and Figure 3The busbar 2 shown connects the winding coil end and the three-phase inlet 5, reduces the insulation risk, shortens the size of the motor end, and can meet more stringent axial space requirements. The busbar 2 is stacked axially by U-phase copper bar 21, V-phase copper bar 22, W-phase copper bar 23, neutral copper bar 24, and insulating plates 25 between adjacent copper bars, and two positioning pins 26 are provided in the circumferential direction to ensure the relative positions of U-phase copper bar 21, V-phase copper bar 22, W-phase copper bar 23, and neutral copper bar 24.

[0038] Furthermore, epoxy resin glue 9 is encapsulated at both ends of the stator core 1 where the winding coil, non-magnetic slot wedge 3, bus 2 and three-phase line inlet 5 are installed, so that the winding coil ends at both ends of the stator core 1 and the bus 2 are all encapsulated with epoxy resin glue 9, thereby improving the insulation performance of the entire motor.

[0039] In another embodiment, by Figure 5 The winding coil shown is a single coil wound around a single stator tooth, and the ends of the coil on each stator tooth are electrically connected by connecting copper bars 8 to form the single coil winding coil. After the side wall of the winding coil is wrapped with insulating paper 4, it is axially positioned on the stator tooth by the coil winding bracket 6 set on the end face of the stator tooth. At this time, the winding coil is wrapped around the side wall of the stator tooth. The non-magnetic slot wedge 3 is inserted into the slot between adjacent stator teeth where the winding coil is set. The end of the winding coil is connected by Figure 2 and Figure 3 The busbar 2 shown is electrically connected to the three-phase line inlet 5 , and the winding coil ends and the busbar 2 are encapsulated with epoxy resin glue 9 .

[0040] The flat wire concentrated winding motor stator has a shorter end size and a simpler process flow, which is very suitable for the application requirements of commercial vehicles; and the use of a flat wire concentrated winding motor can greatly shorten the motor development cycle, while significantly reducing the production line investment. Furthermore, the stator core 1 adopts a full-open design between the stator teeth, which is convenient for assembling the winding coil, avoiding various problems caused by the circumferential segment assembly error of the stator, and after assembling the winding coil, the non-magnetic slot wedge 3 is inserted between the stator teeth to fix it, which plays a role in limiting the winding coil.

[0041] Although different specific embodiments are mentioned in the content of this application, this application is not limited to the situations described in the industry standards or embodiments, etc. Some industry standards or slightly modified implementation plans based on the implementation of the custom methods or embodiments can also achieve the same, equivalent or similar, or predictable implementation effects after deformation of the above embodiments. The embodiments of data acquisition, processing, output, judgment methods, etc. after these modifications or deformations can still fall within the scope of the optional implementation plans of this application.

[0042] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present application without departing from the spirit of the present application. It is intended that the attached embodiments include these modifications and changes without departing from the present application.

Claims

1. A flat wire concentrated winding motor stator, characterized in that: include: Stator core, winding coils, non-magnetic slot wedges, busbars and three-phase line inlets; The stator core comprises an annular cylinder and a plurality of stator teeth arranged on the inner wall of the annular cylinder, one end of the stator tooth is located on the inner wall of the stator core, and the other end of the stator tooth extends toward the central axis direction of the stator core, the winding coil is arranged on the stator tooth, and comprises a plurality of groups of flat wire coils wound on the outer side of a single stator tooth, and the end of the winding coil extends out of the end surface of one end of the stator core and is connected to the bus bar; the non-magnetic slot wedge is inserted between two adjacent stator teeth and the magnetic slot wedge The two ends are located at the adjacent side walls of the stator teeth, the non-magnetic slot wedges are arranged at the two ends of the winding coil away from the stator core and make the winding coil unable to separate from the stator teeth; the busbar is annular and located on the end surface of the stator core extending out of the end of the winding coil, and the busbar includes U-phase copper bar, V-phase copper bar, W-phase copper bar and neutral copper bar stacked along the axial direction of the stator core and an insulating plate arranged between adjacent copper bars; the busbar connects the ends of the winding coil and the three-phase line inlet.

2. The flat wire concentrated winding motor stator according to claim 1, characterized in that: It also includes a coil winding support arranged on the end surface of the stator tooth, the coil winding support is located on the side of the winding coil close to the stator tooth, and the winding coil is positioned on the stator tooth in the axial direction through the coil winding support.

3. The flat wire concentrated winding motor stator according to claim 1, characterized in that: It also includes insulating paper, which is arranged along the axis of the winding coil and wraps the side walls of the winding coil respectively, and the insulating paper insulates the contact part between the winding coil and the stator tooth.

4. The flat wire concentrated winding motor stator according to claim 1, characterized in that: The winding coil can be wound as a single coil and adjacent coils are connected by connecting copper bars so that the components form an electrical path.

5. The flat wire concentrated winding motor stator according to claim 1, characterized in that: The winding coil may be a multi-coil winding coil wound around the stator teeth.

6. The flat wire concentrated winding motor stator according to claim 1, characterized in that: The two ends of the stator core are filled with epoxy resin glue, so that the coil winding ends and the busbar are wrapped in the epoxy resin glue.

7. The flat wire concentrated winding motor stator according to claim 1, characterized in that: The busbar is provided with two positioning pins along the circumferential direction, and the positioning pins are used to fix the busbar.

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