Stator assembly of motor, motor and vehicle

Abstract

The utility model discloses a stator assembly of a motor, the motor and a vehicle, the stator assembly comprises a stator iron core, the stator iron core is formed by axially laminating punching sheets with winding grooves uniformly distributed in the circumferential direction, or is formed by laminating split punching sheets, and the winding grooves are uniformly distributed in the circumference; the number of the winding conducting bars is multiple, and the multiple winding conducting bars are embedded in the winding grooves which are distributed in the circumferential direction; wherein each winding conducting bar is provided with at least one groove, the groove between every two adjacent winding conducting bars forms a cooling channel, and the cooling channels are suitable for circulation of cooling liquid. According to the stator assembly of the motor provided by the embodiment of the invention, the stator assembly can carry out direct contact cooling on the winding conducting bar.

Description

Technical Field

[0001] The present application relates to the field of electric motors, and in particular to a stator assembly of an electric motor, an electric motor and a vehicle. Background Art

[0002] In the related technology, the motor winding is the place where the heat inside the motor is the most serious. However, due to structural reasons, it is generally impossible to directly cool the winding in the slot, resulting in the heat of the motor cannot be quickly taken away. The temperature rise of the stator winding of the motor will be high, causing insulation layer damage, permanent magnet demagnetization and other problems, thereby affecting the motor's continuous working ability, or the maintenance time at the peak operating point, and the power density of the motor cannot be made very high. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a stator assembly of a motor, which can directly cool the winding bars.

[0004] The present application also provides a motor having the above stator assembly.

[0005] The application also provides a vehicle having the motor.

[0006] According to the stator assembly of the motor according to the embodiment of the present application, it includes: a stator core, which is formed by axially stacking punching sheets with winding grooves evenly distributed in the circumferential direction, or is formed by stacking split punching sheets, and the winding grooves are evenly distributed on the circumference; a winding bar, which is constructed in multiple numbers, and multiple winding bars are embedded in the winding grooves distributed on the circumference; wherein there is at least one groove on the winding bar, and the groove between two adjacent winding bars forms a cooling channel, and the cooling channel is suitable for circulating a cooling liquid.

[0007] According to the stator assembly of the motor of the embodiment of the present application, the stator assembly has a stator core and winding bars, the winding bars are sequentially arranged in the winding slots on the stator core, at least one groove is formed between two adjacent winding bars, and the groove can form a cooling channel between two adjacent winding bars. The coolant flows through the cooling channel to directly contact and cool the winding bars, thereby achieving rapid heat dissipation of the stator assembly.

[0008] In some embodiments of the present application, a groove is formed on at least one side of the winding bar in the radial direction.

[0009] In some embodiments of the present application, a plurality of grooves of the winding bars are adjacently arranged in the winding slot.

[0010] In some embodiments of the present application, a plurality of winding slots are spaced apart in a circumferential direction of the stator core.

[0011] In some embodiments of the present application, the stator core is formed with an accommodating cavity extending through the stator core in the axial direction.

[0012] The following is a brief description of the motor according to an embodiment of the present application.

[0013] According to the embodiment of the present application, the motor is provided with the stator assembly of the above embodiment. Since the motor of the embodiment of the present application is provided with the stator assembly of the above embodiment, the stator assembly in the motor has a plurality of winding bars, and at least one groove is formed between two adjacent winding bars. The groove can form a cooling channel between two adjacent winding bars. The coolant absorbs the heat of the winding bars by flowing through the cooling channel, thereby realizing rapid heat dissipation of the stator assembly and improving the line load of the motor and the power density of the motor.

[0014] The following is a brief description of a vehicle according to an embodiment of the present application.

[0015] According to the embodiment of the present application, the vehicle is provided with the motor of the above-mentioned embodiment. Since the vehicle of the embodiment of the present application is provided with the motor of the above-mentioned embodiment, the motor of the vehicle has a stator assembly, and the stator assembly has a plurality of winding bars. At least one groove is formed between two adjacent winding bars. The groove can form a cooling channel between two adjacent winding bars. The coolant absorbs the heat of the winding bars by flowing through the cooling channel, thereby realizing rapid heat dissipation of the stator assembly and improving the line load of the motor and the power density of the motor.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a partial structural schematic diagram of a stator assembly according to an embodiment of the present application;

[0019] Figure 2 yes Figure 1 A schematic axial cross-sectional view of the middle stator assembly;

[0020] Figure 3 is a schematic structural diagram of a winding bar according to an embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of the structure of another winding bar according to an embodiment of the present application.

[0022] Reference numerals:

[0023] 10. stator assembly; 11. stator core; 111. winding slot; 12. winding bar; 121. groove; 122. cooling channel. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0025] Reference below Figure 1-Figure 4 A stator assembly 10 of a motor according to an embodiment of the present application is described, wherein the stator assembly 10 includes a stator core 11 and a winding bar 12. The stator core 11 is formed by axially stacking punching sheets with winding grooves 111 evenly distributed in a circumferential direction, or by stacking split punching sheets, wherein the winding grooves 111 are evenly distributed on the circumference, and the winding bar 12 is constructed in plurality, wherein the plurality of winding bars 12 are embedded in the circumferentially distributed winding grooves 111, wherein the winding bar 12 has at least one groove 121, and the groove 121 between two adjacent winding bars 12 forms a cooling channel 122, and the cooling channel 122 is suitable for circulating a cooling liquid.

[0026] At present, the motor winding is the place where the heat inside the motor is most serious. However, due to structural reasons, it is generally impossible to directly cool the winding in the slot, resulting in the heat of the motor cannot be quickly taken away. The temperature rise of the stator winding of the motor will be high, causing insulation layer damage, permanent magnet demagnetization and other problems, thereby affecting the motor's continuous working ability, or the maintenance time at the peak operating point, and the power density of the motor cannot be made very high.

[0027] like Figure 1 As shown, specifically, a receiving cavity is formed on the stator core 11 and is arranged to pass through in the axial direction. The receiving cavity can be used to accommodate the rotor, and the stator core 11 can be formed by axially stacking punching sheets with winding slots 111 evenly distributed in the circumferential direction, or by stacking split punching sheets. The winding slots 111 can be used to accommodate motor windings, wherein the winding slots 111 can be constructed in multiple numbers, and multiple winding slots 111 can be arranged at intervals in the circumferential direction of the stator core 11, each winding slot 111 can be extended in the radial direction of the stator core 11, and the winding slots 111 can be open toward the receiving cavity, and multiple open openings are formed on the inner wall of the stator core 11, and the open openings are arranged corresponding to the winding slots 111. The motor winding can be installed in the winding slots 111 through the open openings, and the winding slots 111 can be arranged to pass through the stator core 11 in the axial direction. In other embodiments of the present application, the winding slots can be open away from the receiving cavity, or the winding slots can be constructed as closed slots.

[0028] like Figure 2 As shown, the stator assembly 10 also includes a winding bar 12, and the winding bar 12 can be constructed in multiple numbers. The multiple winding bars 12 can be connected end to end in sequence to form a complete motor winding. Further, the multiple winding bars 12 can be radially accommodated in the winding groove 111 in sequence, and the multiple winding bars 12 can be circumferentially limited in the winding groove 111 to prevent the winding bars 12 from moving in the winding groove 111, wherein at least one groove 121 is formed between two adjacent winding bars 12. In some embodiments, a groove 121 is formed on one winding bar 12, and the groove 121 can be recessed toward the winding bar 12. In other embodiments, grooves 121 are formed on two adjacent winding bars 12, and the grooves 121 can be recessed away from each other. The groove 121 can separate two adjacent winding bars 12 to form a cooling channel, which can be used to circulate a coolant. The cooling channel has a liquid inlet formed at one end in the axial direction, and a liquid outlet formed at the other end in the axial direction. The coolant flows from the liquid inlet to the liquid outlet, thereby cooling the winding bars 12, quickly taking away the heat generated by the winding bars 12, and quickly dissipating the heat of the stator assembly 10. In a specific embodiment, the coolant can be cooling oil. By circulating the coolant in the cooling channel, the winding bars 12 can be cooled, the heat generated by the winding bars 12 can be quickly taken away, and the stator assembly 10 can quickly dissipate the heat.

[0029] In short, the stator assembly 10 of the motor of the present application has a stator core 11 and a winding bar 12. The winding bar 12 is sequentially arranged in the winding slot 111 on the stator core 11. At least one groove 121 is formed between two adjacent winding bars 12. The groove 121 can form a cooling channel between two adjacent winding bars 12. The coolant flows through the cooling channel to directly contact and cool the winding bar 12, thereby achieving rapid heat dissipation of the stator assembly 10.

[0030] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, a groove 121 is formed on at least one side of the winding bar 12 in the radial direction. Specifically, the winding bars 12 located at both ends in the winding groove 111 in the radial direction may be formed with a groove 121 on the side facing the inside of the winding groove 111, and the other side is in contact with the inner wall of the winding groove 111. Other winding bars 12 in the winding groove 111 may be respectively formed with grooves 121 on both sides in the radial direction, thereby forming a cooling channel between two adjacent winding bars 12, and the coolant circulates in the cooling channel to cool the winding bars 12.

[0031] In some embodiments of the present application, the winding bar 12 can be constructed in plurality, and the grooves 121 of the plurality of winding bars 12 can be arranged radially opposite to each other, thereby ensuring that a cooling channel is formed between each winding bar 12 and adjacent winding bars 12, thereby cooling the plurality of winding bars 12, improving the cooling efficiency, and achieving rapid heat dissipation of the stator assembly 10.

[0032] The following is a brief description of the motor according to an embodiment of the present application.

[0033] According to the embodiment of the present application, the motor is provided with the stator assembly 10 of the above embodiment. Since the motor of the embodiment of the present application is provided with the stator assembly 10 of the above embodiment, the stator assembly 10 in the motor has a plurality of winding bars 12, and at least one groove 121 is formed between two adjacent winding bars 12. The groove 121 can form a cooling channel between two adjacent winding bars 12. The coolant absorbs the heat of the winding bars 12 by flowing through the cooling channel, thereby realizing rapid heat dissipation of the stator assembly 10 and improving the line load of the motor and the power density of the motor.

[0034] The following is a brief description of a vehicle according to an embodiment of the present application.

[0035] According to the embodiment of the present application, the vehicle is provided with the motor of the above embodiment. Since the vehicle of the embodiment of the present application is provided with the motor of the above embodiment, the motor of the vehicle has a stator assembly 10, and the stator assembly 10 has a plurality of winding bars 12. At least one groove 121 is formed between two adjacent winding bars 12. The groove 121 can form a cooling channel between two adjacent winding bars 12. The coolant absorbs the heat of the winding bars 12 by flowing through the cooling channel, thereby realizing rapid heat dissipation of the stator assembly 10 and improving the line load of the motor and the power density of the motor.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0038] In the description of the present application, “plurality” means two or more.

[0039] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0040] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A stator assembly of a motor, characterized in that: include: A stator core, the stator core is formed by axially laminating punching sheets with winding slots evenly distributed in the circumferential direction, or by laminating split punching sheets, the winding slots being evenly distributed in the circumference; The winding guide bar is constructed in multiple configurations, and the multiple winding guide bars are embedded in the circumferentially distributed winding grooves; wherein, there is at least one groove on the winding guide bar, and the groove between two adjacent winding guide bars forms a cooling channel, and the cooling channel is suitable for circulating a cooling liquid.

2. The stator assembly of the motor according to claim 1, characterized in that: A groove is formed on at least one side of the winding bar in a radial direction.

3. The stator assembly of the motor according to claim 2, characterized in that: The grooves of the plurality of winding bars are adjacently arranged in the winding slot.

4. The stator assembly of the motor according to claim 1, characterized in that: A plurality of the winding slots are arranged at intervals in the circumferential direction of the stator core.

5. The stator assembly of the motor according to claim 4, characterized in that: The stator core is formed with an accommodating cavity which penetrates along the axial direction.

6. A motor, characterized in that: The invention comprises a stator assembly as claimed in any one of claims 1 to 5.

7. A vehicle, characterized in that: The invention comprises the motor as claimed in claim 6.

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