Motor stator, motor and vehicle

Abstract

The present application discloses a motor stator, a motor, and a vehicle. The motor stator includes a stator core and three sets of phase windings. The stator core is formed with a plurality of core slots. The plurality of core slots are arranged at intervals along the circumferential direction of the stator core. Each set of phase windings includes a plurality of parallel winding branches. Each set of winding branches includes three parallel branches. Each branch includes a plurality of coil groups connected in series in the core slots in sequence. Each coil group includes at most three types of sub-coils. The welding ends of the various sub-coils face different directions. The span number of the crown end of the sub-coil is less than 13. Thus, in the present application, by designing the welding ends of the various sub-coils to face different directions and the span number of the crown end of the sub-coil to be less than 13, when the sub-coils are connected in series through the welding ends subsequently, the end height of the welding ends is relatively low. Furthermore, the axial space of the motor can be saved, the resistance of the stator core can be reduced, while the motor efficiency is improved, and there is no structure in which a large-span wire type covers a small-span wire type, and the production process is relatively simple.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and particularly to a motor stator, a motor, and a vehicle. Background Art

[0002] In the related art, a motor stator is composed of a stator core and windings wound around the stator core. However, there are many types of winding line types, and the stator winding has a structure in which there is a reverse twist or a large-span line type covering a small-span, resulting in a relatively high end height of the stator winding and a relatively complex production process. Summary of the Invention

[0003] In view of this, the present invention aims to solve at least one of the problems in the related art to some extent. For this reason, the purpose of the present application is to provide a motor stator, a motor, and a vehicle.

[0004] The present application provides a motor stator. The motor stator includes a stator core and three sets of phase windings. The stator core is formed with a plurality of core slots. The plurality of core slots are arranged at intervals along the circumference of the stator core. Each set of the phase windings includes a plurality of parallel winding branches. Each set of the winding branches includes three parallel branches. Each of the branches includes a plurality of coil groups connected in series in the core slots in sequence. Each of the coil groups includes at most three types of sub-coils. The welding ends of the various sub-coils face different directions. The number of span turns of the crown end of the sub-coil is less than 13.

[0005] In some embodiments, the three sets of phase windings are evenly distributed in the core slots to form conductors of multiple layers of the phase windings in each of the core slots.

[0006] In some embodiments, the sub-coil includes a first type of sub-coil. The first type of sub-coil includes a first crown end, a first straight portion, and a first welding end. The first straight portions are respectively arranged at both ends of the first crown end. The first welding end is connected to the first straight portion. The first welding end faces a first direction. The first straight portions are arranged in different core slots and are located in the same layer. The number of span turns of the first crown end is 9 or 11.

[0007] In some embodiments, the sub-coil includes a second type of sub-coil. The second type of sub-coil includes a second crown end, a second straight portion, and a second welding end. The second straight portions are respectively arranged at both ends of the second crown end. The second welding end is connected to the second straight portion. The second welding ends face in opposite directions. The second straight portions are arranged in different core slots and are located in adjacent layers. The number of span turns of the second crown end is 11.

[0008] In some embodiments, the sub-coil includes a third type of sub-coil, which includes a third crown end, a third straight portion, and a third welding end. The third straight portions are respectively disposed at two ends of the third crown end. The third welding end is connected to the third straight portion. The third welding end faces a second direction opposite to the first direction. The third straight portions are disposed in different core slots and distributed in the same layer. The number of spans of the third crown end is 12.

[0009] In some embodiments, the number of conductor layers of the multi-layer phase windings formed in the core slots is an even number greater than 2. Each coil group includes the first type of sub-coil, a plurality of the second type of sub-coils, and the third type of sub-coil connected in series with each other. The connection order in each coil group is as follows: the first type of sub-coil and the third type of sub-coil are respectively connected in series at the head and the middle of the coil group, and the number of the second type of sub-coils is positively correlated with the number of conductor layers of the phase windings.

[0010] In some embodiments, the number of conductor layers of the multi-layer phase windings formed in the core slots is 2. Each coil group includes the first type of sub-coil and the third type of sub-coil, and the first type of sub-coil and the third type of sub-coil are connected in sequence.

[0011] In some embodiments, the phase windings are uniformly spaced along the circumferential direction of the stator core in the core slots, and the branches are uniformly spaced along the circumferential direction of the stator core in the core slots.

[0012] In some embodiments, the motor stator further includes phase lead wires and a neutral point lead wire. The phase lead wire is the first sub-coil in each winding branch, and the neutral point lead wire is the last sub-coil in each winding branch.

[0013] This application also provides a motor. The motor includes the motor stator according to any one of the above embodiments.

[0014] This application also provides a vehicle. The vehicle includes the motor according to any one of the above embodiments.

[0015] The motor stator, motor, and vehicle according to the embodiments of the present application adopt a winding scheme for the motor by using at most three types of sub-coils, so that the types of sub-coil line shapes are few, and the spatial distribution is relatively simple when arranged on the circumferential iron core slots of the stator iron core. Moreover, since the structures of each branch are basically the same, each branch is completely balanced magnetically and no inter-branch circulating current will be generated. In addition, in the embodiments of the present application, by designing the welding ends of various sub-coils to face different directions and the span number of the crown ends of the sub-coils to be less than 13, when the sub-coils are connected in series through the welding ends later, the end height of the welding ends is relatively low. Furthermore, the axial space of the motor can be saved, the resistance of the stator iron core can be reduced, the motor efficiency can be improved, and there is no structure where a large-span line shape covers a small-span line shape, and the production process is relatively simple.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or 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 be readily understood from the following description of the embodiments in conjunction with the drawings, where:

[0018] Figure 1 is one of the three-dimensional schematic diagrams of the motor winding according to some embodiments of the present application;

[0019] Figure 2 is another three-dimensional schematic diagram of the motor winding according to some embodiments of the present application;

[0020] Figure 3 is the top view schematic diagram of the motor winding according to some embodiments of the present application;

[0021] Figure 4 is the schematic diagram of the scene after the three-phase phase windings according to some embodiments of the present application are arranged on the unfolded motor iron core;

[0022] Figure 5 is the structural schematic diagram of the first type of sub-coil according to some embodiments of the present application;

[0023] Figure 6 is the structural schematic diagram of the second type of sub-coil according to some embodiments of the present application;

[0024] Figure 7 is the structural schematic diagram of the third type of sub-coil according to some embodiments of the present application;

[0025] Figure 8 is one of the schematic diagrams of the scene after the branches according to some embodiments of the present application are arranged on the unfolded motor iron core;

[0026] Figure 9It is the second schematic diagram of the branch circuit arrangement after the motor iron core is unfolded in some embodiments of the present application;

[0027] Figure 10 It is the third schematic diagram of the branch circuit arrangement after the motor iron core is unfolded in some embodiments of the present application;

[0028] Figure 11 It is the schematic diagram of the three branch circuits of the phase winding after the motor iron core is unfolded in some embodiments of the present application.

[0029] Description of reference numerals:

[0030] Motor stator 100; stator core 10, core slot 11; phase winding 30; winding branch 31; branch 33; sub-coil 331; first type of sub-coil 3311, first crown end 33111, first straight portion 33113, first welding end 33115; second type of sub-coil 3313, second crown end 33131, second straight portion 33133, second welding end 33135; third type of sub-coil 3315, third crown end 33151, third straight portion 33153, third welding end 33155. Detailed implementation manners

[0031] The following describes in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0032] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0033] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. It may refer to a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. Additionally, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between various embodiments and / or settings discussed.

[0035] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0036] Please refer to Figure 1 or Figure 2 The present application provides a motor stator 100. The motor stator 100 includes a stator core 10 and three sets of phase windings 30. The stator core 10 is formed with a plurality of core slots 11. The plurality of core slots 11 are arranged at intervals along the circumferential direction of the stator core 10. Each set of phase windings 30 includes multiple sets of parallel winding branches 31. Each set of winding branches 31 includes three parallel branches 33. Each branch 33 includes a plurality of coil groups connected in series in the core slot 11 in sequence. Each coil group includes at most three types of sub-coils 331. The welding ends of various sub-coils 331 face different directions. The span number of the crown end of the sub-coil 331 is less than 13.

[0037] Specifically, as Figure 3 and Figure 4 shown, the stator core 10 may be formed with a plurality of core slots 11 along the axial direction of the stator core 10. The plurality of core slots 11 may be arranged at uniform intervals along the axial direction of the stator core 10, so that when the core slots 11 are arranged on the stator core 10, it is more beautiful and the production process is relatively simple. The plurality of core slots 11 may be, for example, 72 slots.

[0038] The three sets of phase windings 30 may include a U-phase winding, a V-phase winding, and a W-phase winding. The U-phase winding, the V-phase winding, and the W-phase winding may each include multiple sets of parallel winding branches 31. The multiple sets of parallel winding branches 31 may be, for example, 3 sets.

[0039] Each winding branch 31 of each group may include three parallel branches 33. Each branch 33 may include a plurality of coil groups connected in series in the iron core slot 11 in sequence. Each coil group may include two or three types of sub-coils 331. The orientations of the welding ends of various sub-coils 331 may be different. The number of spans of the crown ends of the sub-coils 331 may be less than 13, so that when the sub-coils 331 are connected in series through the welding ends subsequently, the end height of the welding ends is relatively low, thereby the axial space of the motor can be saved, the resistance of the stator iron core 10 can be reduced, the motor efficiency can be improved, and there is no structure where the linear type with a large span covers the linear type with a small span, and the production process is relatively simple.

[0040] It should be noted that the sub-coils 331 may be made of copper. The number of spans of the welding ends of the sub-coils 331 in the embodiments of the present application may all be 11. Therefore, when the welding ends of the sub-coils 331 in the embodiments of the present application are arranged on the iron core slot 11, they are relatively neatly arranged, and the welding manufacturing process is relatively simple. The three-phase windings 30 in the embodiments of the present application are only different in the spatial distribution in the slots of the stator iron core 10, but are completely the same in the connection structure. Therefore, it can be known by the same token that each winding branch 31 is also only different in the spatial distribution in the slots of the stator iron core 10, but is also completely the same in the connection structure. Therefore, for the sake of simplicity of the article, the U-phase winding will be used as an example for illustration below:

[0041] In one example, as Figure 4 shown, the U-phase winding may include a U1 branch, a U2 branch, and a U3 branch. The U1 branch, the U2 branch, and the U3 branch may all include 4 groups of coil groups connected in series in the iron core slot 11 in sequence.

[0042] Each coil group may include a first-type sub-coil 3311, a second-type sub-coil 3313, and a third-type sub-coil 3315. The orientations of the welding ends of the first-type sub-coil 3311, the second-type sub-coil 3313, and the third-type sub-coil 3315 are all different, and the number of spans of the crown ends of the first-type sub-coil 3311, the second-type sub-coil 3313, and the third-type sub-coil 3315 is less than 13 iron core slots 11, so that the types of sub-coil 331 line types are less, the spatial distribution is relatively simple when arranged on the circumferential iron core slots 11 of the stator iron core 10, and when the sub-coils 331 are connected in series through the welding ends subsequently, the end height of the welding ends is relatively low, the axial space of the motor can be saved, the resistance of the stator iron core 10 can be reduced, the motor efficiency can be improved, and there is no structure where the linear type with a large span covers the linear type with a small span, and the production process is relatively simple.

[0043] Thus, the motor stator 100 of the embodiment of the present application realizes the winding scheme of the motor by adopting at most three types of sub-coils 331, so that the types of sub-coil 331 line shapes are few, and the spatial distribution is relatively simple when arranged on the circumferential core slots 11 of the stator core 10. Moreover, since the structures of the respective branches 33 are basically the same, the magnetic circuits of the respective branches 33 are completely balanced, and no circulating current is generated between the branches 33. In addition, in the embodiment of the present application, by designing the welding ends of various sub-coils 331 to face different directions and the span number of the crown ends of the sub-coils 331 to be less than 13, the end height of the welding ends is relatively low when the sub-coils 331 are connected in series through the welding ends. Furthermore, the axial space of the motor can be saved, the resistance of the stator core 10 can be reduced, and the motor efficiency can be improved. At the same time, there is no structure in which a large-span line shape covers a small-span line shape, and the production process is relatively simple.

[0044] Please refer to Figure 4 , in some embodiments, the three sets of phase windings 30 are evenly distributed in the core slots 11 to form a conductor layer of multiple layers of phase windings 30 in each core slot 11. That is to say, in the embodiment of the present application, by evenly distributing the three sets of phase windings 30 in the core slots 11 and forming a conductor layer of multiple layers of phase windings 30 in each core slot 11, the overall appearance of the motor stator 100 is relatively beautiful, and the production process is relatively simple. It should be noted that the number of conductor layers of multiple layers of phase windings 30 formed in each core slot 11 can be, for example, even numbers such as 2 layers, 4 layers, 6 layers, 8 layers, or 10 layers, and is not limited herein.

[0045] In one embodiment, as Figure 4 shown, the stator core 10 is formed with 72 core slots 11, and the 72 core slots 11 are arranged at intervals along the circumference of the stator core 10. The U-phase winding, the V-phase winding, and the W-phase winding can be evenly distributed in the 72 core slots 11 to form a conductor layer of 8 layers of phase windings 30 in each core slot 11, that is, as Figure 4 shown is the distribution of the U-phase winding, the V-phase winding, and the W-phase winding in the core slot 11. Each column represents a core slot 11, and the slot numbers from 1 to 72 are numbered according to Figure 4 shown. Each row represents a layer of phase winding 30, and can be arranged as L1-L8 or L8-L1 from top to bottom to form 8 conductor layers, so that the conductors of the three sets of phase windings 30 are evenly distributed in the core slots 11 of the stator core 10, and the overall appearance of the motor stator 100 is relatively beautiful, and the production process is relatively simple.

[0046] It should be noted that the motor stator 100 of the embodiment of the present application can be the 6-pole 72-slot flat wire motor stator 100 shown in Figure 4 , or can be any motor stator 100 that needs to adopt a coil winding, and is not limited herein.

[0047] Please refer to Figure 5 In some embodiments, the sub-coil 331 includes a first type of sub-coil 3311. The first type of sub-coil 3311 includes a first crown end 33111, a first straight portion 33113, and a first welding end 33115. The first straight portion 33113 is respectively disposed at both ends of the first crown end 33111. The first welding end 33115 is connected to the first straight portion 33113. The first welding end 33115 faces the first direction. The first straight portion 33113 is disposed in different iron core slots 11 and is located in the same layer. The number of spans of the first crown end 33111 is 9 or 11.

[0048] That is, one end of the first straight portion 33113 can be respectively disposed at both ends of the first crown end 33111 by welding or integral molding. One end of the first welding end 33115 can be connected to the other end of the first straight portion 33113 by welding or integral molding. The facing direction of the first welding end 33115 can be Figure 5 the first direction A1 shown in, so that when the first type of sub-coil 3311 is disposed on the iron core slot 11, the two first straight portions 33113 are respectively disposed in different iron core slots 11 and are located in the same conductor layer. The number of spans of the first crown end 33111 can be 9 iron core slots 11 or 11 iron core slots 11, so that when the sub-coils 331 are connected in series through the first welding end 33115 later, the end height of the welding end is lower, saving the axial space of the motor, reducing the resistance of the stator iron core 10, and improving the motor efficiency.

[0049] Please refer to Figure 6 In some embodiments, the sub-coil 331 includes a second type of sub-coil 3313. The second type of sub-coil 3313 includes a second crown end 33131, a second straight portion 33133, and a second welding end 33135. The second straight portion 33133 is respectively disposed at both ends of the second crown end 33131. The second welding end 33135 is connected to the second straight portion 33133. The second welding ends 33135 face in opposite directions. The second straight portion 33133 is disposed in different iron core slots 11 and is located in adjacent layers. The number of spans of the second crown end 33131 is 11.

[0050] That is, one end of the second straight portion 33133 can be respectively disposed at both ends of the second crown end 33131 by welding or integral molding. One end of the second welding end 33135 can be connected to the other end of the second straight portion 33133 by welding or integral molding. The facing direction of one of the second welding ends 33135 can be Figure 6 the first direction A1 shown in, and the facing direction of the other second welding end 33135 can be as Figure 6The second direction A2 opposite to the first direction A1 is shown, so that the facing directions of the second welding ends 33135 are opposite. When the second type of sub-coil 3313 is arranged on the iron core slot 11, the two second straight portions 33133 are arranged in different iron core slots 11 and are located in adjacent upper and lower conductor layers. The span number of the second crown end 33131 can be 11 iron core slots 11, so that when the sub-coils 331 are connected in series through the second welding ends 33135 subsequently, the end height of the welding ends is lower, saving the axial space of the motor, reducing the resistance of the stator iron core 10, and improving the motor efficiency.

[0051] Please refer to Figure 7 , in some embodiments, the sub-coil 331 includes a third type of sub-coil 3315. The third type of sub-coil 3315 includes a third crown end 33151, a third straight portion 33153, and a third welding end 33155. The third straight portions 33153 are respectively arranged at both ends of the third crown end 33151. The third welding end 33155 is connected to the third straight portion 33153. The third welding end 33155 faces the second direction opposite to the first direction. The third straight portions 33153 are arranged in different iron core slots 11 and are located in the same layer. The span number of the welding ends of the third crown end 33151 is 12.

[0052] That is to say, one end of the third straight portion 33153 can be respectively arranged at both ends of the third crown end 33151 by welding or integral molding. One end of the third welding end 33155 can be connected to the other end of the third straight portion 33153 by welding or integral molding. The facing direction of the third welding end 33155 can be Figure 7 shown as Figure 5 the second direction A2 opposite to the first direction A1 shown, so that when the third type of sub-coil 3315 is arranged on the iron core slot 11, the two third straight portions 33153 are respectively arranged in different iron core slots 11 and are located in the same conductor layer. The span number of the third crown end 33151 can be 12 iron core slots 11, so that when the sub-coils 331 are connected in series through the third welding ends 33155 subsequently, the end height of the welding ends is lower, saving the axial space of the motor, reducing the resistance of the stator iron core 10, and improving the motor efficiency.

[0053] In some embodiments, the number of conductor layers of the multi-layer phase winding 30 formed in the iron core slot 11 is an even number greater than 2. Each coil group includes a first type of sub-coil 3311, a plurality of second type of sub-coils 3313, and a third type of sub-coil 3315 connected in series with each other. The connection order in each coil group is: the first type of sub-coil 3311 and the third type of sub-coil 3315 are respectively connected in series at the head and middle positions of the coil group, and the number of the second type of sub-coils 3313 is positively correlated with the number of conductor layers of the phase winding 30.

[0054] That is, the number of conductor layers of the multi-layer phase winding 30 formed in the iron core slot 11 can be 4 layers, 6 layers, 8 layers, 10 layers, etc. Each of the three parallel branches 33 included in the U-phase winding, V-phase winding, and W-phase winding can include a plurality of coil groups connected in series in the iron core slot 11 in sequence. Each coil group includes a first-type sub-coil 3311, a plurality of second-type sub-coils 3313, and a third-type sub-coil 3315 that are connected in series with each other. The connection order in each coil group can be that the first-type sub-coil 3311 and the third-type sub-coil 3315 are respectively connected to the first and middle positions of the coil group. The number of the second-type sub-coils 3313 is positively correlated with the number of conductor layers of the phase winding 30. For example, when the number of conductor layers of the phase winding 30 is 4 layers, the number of the second-type sub-coils 3313 included in each coil group can be 2, and the 2 second-type sub-coils 3313 can be evenly distributed on both sides of the third-type sub-coil 3315. When the number of conductor layers of the phase winding 30 is 6 layers, the number of the second-type sub-coils 3313 included in each coil group can be 4, and the 4 second-type sub-coils 3313 can be evenly distributed on both sides of the third-type sub-coil 3315. When the number of conductor layers of the phase winding 30 is 8 layers, the number of the second-type sub-coils 3313 included in each coil group can be 6, and the 6 second-type sub-coils 3313 can be evenly distributed on both sides of the third-type sub-coil 3315, and so on.

[0055] In one embodiment, since the connection structures of the U-phase winding, V-phase winding, and W-phase winding are the same, for the sake of simplicity of the article, the connection structure of the U-phase winding is taken as an example for illustration below:

[0056] The U-phase winding can include a U1 branch, a U2 branch, and a U3 branch. Each of the U1 branch, U2 branch, and U3 branch can include 4 coil groups.

[0057] More specifically, the U1 branch can include a U1 first coil group, a U1 second coil group, a U1 third coil group, and a U1 fourth coil group. Each of the U1 first coil group, U1 second coil group, U1 third coil group, and U1 fourth coil group can include a first-type sub-coil 3311, a second-type sub-coil 3313, and a third-type sub-coil 3315. Among them, the first-type sub-coil 3311 can be represented by PIN1. The second-type sub-coil 3313 can be represented by PIN2. The third-type sub-coil 3315 can be represented by PIN3.

[0058] PIN1-9 (U1-1 / U1-2), PIN2-11 (U1-3 / U1-4), PIN2-11 (U1-5 / U1-6), PIN2-11 (U1-7 / U1-8), PIN3-12 (U1-9 / U1-10), PIN2-11 (U1-11 / U1-12), PIN2-11 (U1-13 / U1-14), and PIN2-11 (U1-15 / U1-16) form the first coil group of U1; PIN1-11 (U1-17 / U1-18), PIN2-11 (U1-19 / U1-20), PIN2-11 (U1-21 / U1-22), PIN2-11 (U1-23 / U1-24), PIN3-12 (U1-25 / U1-26), PIN2-11 (U1-27 / U1-28), PIN2-11 (U1-29 / U1-30), and PIN2-11 (U1-31 / U1-32) form the second coil group of U1; PIN1-11 (U1-33 / U1-34), PIN2-11 (U1-35 / U1-36), PIN2-11 (U1-37 / U1-38), PIN2-11 (U1-39 / U1-40), PIN3-12 (U1-41 / U1-42), PIN2-11 (U1-43 / U1-44), PIN2-11 (U1-45 / U1-46), and PIN2-11 (U1-47 / U1-48) form the third coil group of U1; PIN1-11 (U1-49 / U1-50), PIN2-11 (U1-51 / U1-52), PIN2-11 (U1-53 / U1-54), PIN2-11 (U1-55 / U1-56), PIN3-12 (U1-57 / U1-58), PIN2-11 (U1-59 / U1-60), PIN2-11 (U1-61 / U1-62), and PIN2-11 (U1-63 / U1-64) form the fourth coil group of U1. It should be noted that taking PIN1-9 (U1-1 / U1-2) as an example to explain the above symbols, 9 can represent the span number of the first crown end 33111 of the first subtype coil 3311, U1-1 can represent the number of one of the first welding ends 33115 of the first subtype coil 3311 of the U1 branch, and U1-2 can represent the number of the other first welding end 33115 of the first subtype coil 3311 of the U1 branch. Since the expression purposes of other sub-coils 331 numbers are the same, for the sake of brevity of the article, it will not be elaborated here.

[0059] Such as Figure 8As shown, the connection order of the first-type sub-coils 3311, second-type sub-coils 3313, and third-type sub-coils 3315 of each coil group in the U1 branch can be: PIN1-9 (U1-1 / U1-2), PIN2-11 (U1-3 / U1-4), PIN2-11 (U1-5 / U1-6), PIN2-11 (U1-7 / U1-8), PIN3-12 (U1-9 / U1-10), PIN2-11 (U1-11 / U1-12), PIN2-11 (U1-13 / U1-14), PIN2-11 (U1-15 / U1-16), PIN1-11 (U1-17 / U1-18), PIN2-11 (U1-19 / U1-20), PIN2-11 (U1-21 / U1-22), PIN2-11 (U1-23 / U1-24), PIN3-12 (U1-25 / U1-26), PIN2-11 (U1-27 / U1-28), PIN2-11 (U1-29 / U1-30), PIN2-11 (U1-31 / U1-32), PIN1-11 (U1-33 / U1-34), PIN2-11 (U1-35 / U1-36), PIN2-11 (U1-37 / U1-38), PIN2-11 (U1-39 / U1-40), PIN3-12 (U1-41 / U1-42), PIN2-11 (U1-43 / U1-44), PIN2-11 (U1-45 / U1-46), PIN2-11 (U1-47 / U1-48), PIN1-11 (U1-49 / U1-50), PIN2-11 (U1-51 / U1-52), PIN2-11 (U1-53 / U1-54), PIN2-11 (U1-55 / U1-56), PIN3-12 (U1-57 / U1-58), PIN2-11 (U1-59 / U1-60), PIN2-11 (U1-61 / U1-62), PIN2-11 (U1-63 / U1-64), to be connected to form the U1 branch.

[0060] The U2 branch can include a U2 first coil group, a U2 second coil group, a U2 third coil group, and a U2 fourth coil group. The U2 first coil group, the U2 second coil group, the U2 third coil group, and the U2 fourth coil group can all include first-type sub-coils 3311, second-type sub-coils 3313, and third-type sub-coils 3315.

[0061] PIN1-9 (U2-1 / U1-2), PIN2-11 (U2-3 / U2-4), PIN2-11 (U2-5 / U2-6), PIN2-11 (U2-7 / U2-8), PIN3-12 (U2-9 / U2-10), PIN2-11 (U2-11 / U2-12), PIN2-11 (U2-13 / U2-14) and PIN2-11 (U2-15 / U2-16) form the first coil group of U2; PIN1-11 (U2-17 / U2-18), PIN2-11 (U2-19 / U2-20), PIN2-11 (U2-21 / U2-22), PIN2-11 (U2-23 / U2-24), PIN3-12 (U2-25 / U2-26), PIN2-11 (U2-27 / U2-28), PIN2-11 (U2-29 / U2-30) and PIN2-11 (U2-31 / U2-32) form the second coil group of U2; PIN1-11 (U2-33 / U2-34), PIN2-11 (U2-35 / U2-36), PIN2-11 (U2-37 / U2-38), PIN2-11 (U2-39 / U2-40), PIN3-12 (U2-41 / U2-42), PIN2-11 (U2-43 / U2-44), PIN2-11 (U2-45 / U2-46) and PIN2-11 (U2-47 / U2-48) form the third coil group of U2; PIN1-11 (U2-49 / U2-50), PIN2-11 (U2-51 / U2-52), PIN2-11 (U2-53 / U2-54), PIN2-11 (U2-55 / U2-56), PIN3-12 (U2-57 / U2-58), PIN2-11 (U2-59 / U2-60), PIN2-11 (U2-61 / U2-62) and PIN2-11 (U2-63 / U2-64) form the fourth coil group of U2.

[0062] Such as Figure 9As shown, the connection order of the first-type sub-coils 3311, the second-type sub-coils 3313, and the third-type sub-coils 3315 of each coil group in the U2 branch can be: PIN1-9 (U2-1 / U2-2), PIN2-11 (U2-3 / U2-4), PIN2-11 (U2-5 / U2-6), PIN2-11 (U2-7 / U2-8), PIN3-12 (U2-9 / U2-10), PIN2-11 (U2-11 / U2-12), PIN2-11 (U2-13 / U2-14), PIN2-11 (U2-15 / U2-16), PIN1-11 (U2-17 / U2-18), PIN2-11 (U2-19 / U2-20), PIN2-11 (U2-21 / U2-22), PIN2-11 (U2-23 / U2-24), PIN3-12 (U2-25 / U2-26), PIN2-11 (U2-27 / U2-28), PIN2-11 (U2-29 / U2-30), PIN2-11 (U2-31 / U2-32), PIN1-11 (U2-33 / U2-34), PIN2-11 (U2-35 / U2-36), PIN2-11 (U2-37 / U2-38), PIN2-11 (U2-39 / U2-40), PIN3-12 (U2-41 / U2-42), PIN2-11 (U2-43 / U2-44), PIN2-11 (U2-45 / U2-46), PIN2-11 (U2-47 / U2-48), PIN1-11 (U2-49 / U2-50), PIN2-11 (U2-51 / U2-52), PIN2-11 (U2-53 / U2-54), PIN2-11 (U2-55 / U2-56), PIN3-12 (U2-57 / U2-58), PIN2-11 (U2-59 / U2-60), PIN2-11 (U2-61 / U2-62), PIN2-11 (U2-63 / U2-64) to connect and form the U2 branch.

[0063] The U3 branch can include a U3 first coil group, a U3 second coil group, a U3 third coil group, and a U3 fourth coil group. The U3 first coil group, the U3 second coil group, the U3 third coil group, and the U3 fourth coil group can all include the first-type sub-coils 3311, the second-type sub-coils 3313, and the third-type sub-coils 3315.

[0064] PIN1-9 (U3-1 / U1-2), PIN2-11 (U3-3 / U3-4), PIN2-11 (U3-5 / U3-6), PIN2-11 (U3-7 / U3-8), PIN3-12 (U3-9 / U3-10), PIN2-11 (U3-11 / U3-12), PIN2-11 (U3-13 / U3-14) and PIN2-11 (U3-15 / U3-16) form the first coil group of U3; PIN1-11 (U3-17 / U3-18), PIN2-11 (U3-19 / U3-20), PIN2-11 (U3-21 / U3-22), PIN2-11 (U3-23 / U3-24), PIN3-12 (U3-25 / U3-26), PIN2-11 (U3-27 / U3-28), PIN2-11 (U3-29 / U3-30) and PIN2-11 (U3-31 / U3-32) form the second coil group of U3; PIN1-11 (U3-33 / U3-34), PIN2-11 (U3-35 / U3-36), PIN2-11 (U3-37 / U3-38), PIN2-11 (U3-39 / U3-40), PIN3-12 (U3-41 / U3-42), PIN2-11 (U3-43 / U3-44), PIN2-11 (U3-45 / U3-46) and PIN2-11 (U3-47 / U3-48) form the third coil group of U3; PIN1-11 (U3-49 / U3-50), PIN2-11 (U3-51 / U3-52), PIN2-11 (U3-53 / U3-54), PIN2-11 (U3-55 / U3-56), PIN3-12 (U3-57 / U3-58), PIN2-11 (U3-59 / U3-60), PIN2-11 (U3-61 / U3-62) and PIN2-11 (U3-63 / U3-64) form the fourth coil group of U3.

[0065] Such as Figure 10As shown, the connection sequence of the first-type sub-coils 3311, the second-type sub-coils 3313, and the third-type sub-coils 3315 in each coil group of the U3 branch can be: PIN1-9 (U3-1 / U3-2), PIN2-11 (U3-3 / U3-4), PIN2-11 (U3-5 / U3-6), PIN2-11 (U3-7 / U3-8), PIN3-12 (U3-9 / U3-10), PIN2-11 (U3-11 / U3-12), PIN2-11 (U3-13 / U3-14), PIN2-11 (U3-15 / U3-16), PIN1-11 (U3-17 / U3-18), PIN2-11 (U3-19 / U3-20), PIN2-11 (U3-21 / U3-22), PIN2-11 (U3-23 / U3-24), PIN3-12 (U3-25 / U3-26), PIN2-11 (U3-27 / U3-28), PIN2-11 (U3-29 / U3-30), PIN2-11 (U3-31 / U3-32), PIN1-11 (U3-33 / U3-34), PIN2-11 (U3-35 / U3-36), PIN2-11 (U3-37 / U3-38), PIN2-11 (U3-39 / U3-40), PIN3-12 (U3-41 / U3-42), PIN2-11 (U3-43 / U3-44), PIN2-11 (U3-45 / U3-46), PIN2-11 (U3-47 / U3-48), PIN1-11 (U3-49 / U3-50), PIN2-11 (U3-51 / U3-52), PIN2-11 (U3-53 / U3-54), PIN2-11 (U3-55 / U3-56), PIN3-12 (U3-57 / U3-58), PIN2-11 (U3-59 / U3-60), PIN2-11 (U3-61 / U3-62), PIN2-11 (U3-63 / U3-64), so as to be connected to form the U3 branch.

[0066] In summary, the overall connection structure arrangement of the U-phase winding can be as Figure 11 shown. It can be seen that in the embodiment of the present application, the span numbers of most of the sub-coils 331 are concentrated in 11 span slots, and the span numbers of a small number of sub-coils 331 are in 12 span slots or 9 span slots. And since there are at most 3 types of sub-coils 331 in the embodiment of the present application, the span numbers of the sub-coils 331 in the motor stator 100 of the embodiment of the present application are relatively small, and there is no structure where a large-span (i.e., the span number is greater than 13) linear type covers a small-span linear type. While the production process is relatively simple, it can also save the axial space of the motor, reduce the resistance of the stator core 10, and improve the motor efficiency.

[0067] In some embodiments, the number of conductor layers of the multi-layer phase winding 30 formed in the iron core slot 11 is 2 layers. Each coil group includes a first-type sub-coil 3311 and a third-type sub-coil 3315. The first-type sub-coil 3311 and the third-type sub-coil 3315 are connected in sequence. That is, when the number of conductor layers of the multi-layer phase winding 30 formed in the iron core slot 11 is 2 layers, there is no second-type sub-coil 3313 in each coil group. Therefore, the connection sequence of the sub-coils 331 in each coil group can be that the first-type sub-coil 3311 and the third-type sub-coil 3315 are directly connected in sequence, so that the span number of the coil is small, and there is no structure in which a large-span (i.e., the span number is greater than 13) linear type covers a small-span linear type, and the production process is relatively simple.

[0068] Please refer to Figure 1 、 Figure 4 and Figure 11 , in some embodiments, the phase windings 30 are arranged in the iron core slots 11 at equal intervals along the circumferential direction of the stator iron core 10. The branches 33 are arranged in the iron core slots 11 at equal intervals along the circumferential direction of the stator iron core 10.

[0069] That is, since the connection structures of the three groups of phase windings 30 in the embodiments of the present application are completely the same, that is, the connection structures of the U-phase winding, the V-phase winding, and the W-phase winding are completely the same, therefore, referring to Figure 1 and Figure 4 shown, in the embodiments of the present application, the U-phase winding can be first arranged along the circumferential direction of the stator iron core 10, and then the V-phase winding can be arranged in the corresponding iron core slot 11 after rotating the U-phase winding 8 iron core slots 11 in the direction B, and the W-phase winding can be arranged in the corresponding iron core slot 11 after rotating the U-phase winding 16 iron core slots 11 in the direction B. That is, in the same direction, the interval between the V-phase winding and the U-phase winding can be 8 iron core slots 11, and the interval between the W-phase winding and the U-phase winding can be 16 iron core slots 11, so that the U-phase winding, the V-phase winding, and the W-phase winding are arranged at equal intervals in the iron core slots 11, and the arrangement and production process of the phase windings 30 are relatively simple.

[0070] Furthermore, since the connection structures of the U-phase winding, the V-phase winding, and the W-phase winding are completely the same, and the U-phase winding, the V-phase winding, and the W-phase winding each include three branches 33, therefore, based on the same principle above, taking the U1 branch, U2 branch, and U3 branch of the U-phase as an example, the U1 branch can be first arranged at the position shown in Figure 8 shown, and then the U2 branch can be arranged in the corresponding iron core slot 11 after rotating the U1 branch 24 iron core slots 11 in the direction B (as shown in Figure 9 shown), and the U3 branch can be arranged in the corresponding iron core slot 11 after rotating the U1 branch 48 iron core slots 11 in the direction B (as shown in Figure 10As shown, the distance between the U2 branch and the U1 branch in the same direction can be 24 core slots 11, and the distance between the U3 branch and the U1 branch can be 48 core slots 11. Thus, the U1 branch, the U2 branch, and the U3 branch are evenly spaced in the core slots 11, without a structure where a large-span line type covers a small-span line type, and the production process is relatively simple.

[0071] In some embodiments, the motor stator 100 further includes phase lead wires and a neutral point lead wire. The phase lead wire is the first sub-coil 331 in each winding branch 31. The neutral point lead wire is the last sub-coil 331 in each winding branch 31.

[0072] That is to say, in the motor stator 100 of the embodiment of the present application, the first sub-coil 331 in each winding branch 31 of the U-phase winding, the V-phase winding, and the W-phase winding can be used as the phase lead wire, and the last sub-coil 331 in each winding branch 31 of the U-phase winding, the V-phase winding, and the W-phase winding can be used as the neutral point lead wire. Therefore, in the embodiment of the present application, the user can flexibly design the positions of the phase lead wire and the neutral point lead wire according to the actual application situation. However, it should be noted that the design of the phase lead wire and the neutral point lead wire needs to follow the following rules:

[0073] (1) The positions of the phase lead wires of the 3 groups of winding branches 31 must all be conductors with odd numbers or all be conductors with even numbers. When the positions of the phase lead wires are all conductors with even numbers, the position of the neutral point lead wire conductor must be a conductor with an odd number, and vice versa;

[0074] (2) When the conductor number of the phase lead wire of the winding branch 31 is an even number k, the conductor number of the neutral point lead wire is k + 1. If k is 64, the conductor number of the neutral point lead wire is 1;

[0075] (3) When the conductor number of the phase lead wire of the winding branch 31 is an odd number j, the conductor number of the center point lead wire is j - 1. If j is 1, the conductor number of the neutral point lead wire is 64.

[0076] In summary, according to the above design rules, the lead wires can be designed at any position of the entire winding branch 31. Here, in the embodiment of the present application, it is recommended to design the phase lead wires of the three winding branches 31 under the same pole, so as to simplify the design of the bus bar.

[0077] The present application also provides a motor. The motor includes the motor stator 100 described above. The specific motor stator 100 is as described above and will not be repeated here. It should be noted that the motor can be a flat wire motor, etc.

[0078] Thus, the motor according to the embodiment of the present application realizes the winding scheme of the motor by adopting at most three types of sub-coils 331, so that the types of the sub-coil 331 line shapes are less, and the spatial distribution is relatively simple when arranged on the circumferential core slots 11 of the stator core 10. Moreover, since the structures of the respective branches 33 are basically the same, each branch 33 is completely balanced in the magnetic circuit and no circulating current will be generated between the branches 33. In addition, in the embodiment of the present application, by designing the welding ends of various sub-coils 331 to face different directions and the span number of the crown ends of the sub-coils 331 to be less than 13, when the sub-coils 331 are connected in series through the welding ends subsequently, the end height of the welding ends is relatively low. Furthermore, the axial space of the motor can be saved, the resistance of the stator core 10 can be reduced, the motor efficiency can be improved, and there is no structure in which a large-span line shape covers a small-span line shape, and the production process is relatively simple.

[0079] The present application also provides a vehicle. The vehicle includes the motor described above. The specific motor is as described above and will not be elaborated here.

[0080] Thus, the vehicle according to the embodiment of the present application realizes the winding scheme of the motor by adopting at most three types of sub-coils 331, so that the types of the sub-coil 331 line shapes are less, and the spatial distribution is relatively simple when arranged on the circumferential core slots 11 of the stator core 10. Moreover, since the structures of the respective branches 33 are basically the same, each branch 33 is completely balanced in the magnetic circuit and no circulating current will be generated between the branches 33. In addition, in the embodiment of the present application, by designing the welding ends of various sub-coils 331 to face different directions and the span number of the crown ends of the sub-coils 331 to be less than 13, when the sub-coils 331 are connected in series through the welding ends subsequently, the end height of the welding ends is relatively low. Furthermore, the axial space of the motor can be saved, the resistance of the stator core 10 can be reduced, the motor efficiency can be improved, and there is no structure in which a large-span line shape covers a small-span line shape, and the production process is relatively simple.

[0081] The above embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A motor stator, characterized in that: The motor stator comprises: A stator core, wherein the stator core is formed with a plurality of core slots, and the plurality of core slots are arranged at intervals along the circumference of the stator core; Three groups of phase windings, the three groups of phase windings are evenly distributed in the core slots to form multiple conductor layers of the phase windings in each core slot, each group of the phase windings includes multiple groups of parallel winding branches, each group of the winding branches includes three parallel branches, each branch includes multiple coil groups connected in series in the core slots, each coil group includes at most three types of sub-coils, the welding ends of the various sub-coils are oriented in different directions, and the span number of the crown end of the sub-coil is less than 13; The sub-coil includes a first type of sub-coil, the first type of sub-coil includes a first crown end, a first straight portion and a first welding end, the first straight portion is respectively arranged at two ends of the first crown end, the first welding end is connected to the first straight portion, the first welding end faces a first direction, the first straight portion is arranged in different core slots and located in the same layer, and the span number of the first crown end is 9 or 11; The sub-coil includes a second type of sub-coil, the second type of sub-coil includes a second crown end, a second straight portion and a second welding end, the second straight portion is respectively arranged at both ends of the second crown end, the second welding end is connected to the second straight portion, the second welding end faces oppositely, the second straight portion is arranged in different core slots and located in adjacent layers, and the span number of the second crown end is 11; The sub-coil includes a third type sub-coil, and the third type sub-coil includes a third crown end, a third straight portion and a third welding end. The third straight portion is respectively arranged at both ends of the third crown end, and the third welding end is connected to the third straight portion. The third welding end faces a second direction opposite to the first direction. The third straight portion is arranged in different core slots and is located on the same layer. The span number of the third crown end is 12.

2. The motor stator according to claim 1, characterized in that: The number of conductor layers of the multi-layer phase winding formed in the core slot is an even number greater than 2, each of the coil groups includes the first type sub-coil, a plurality of the second type sub-coils and the third type sub-coil connected in series, and the connection order in each coil group is: The first type sub-coil and the third type sub-coil are respectively connected in series at the first position and the middle position of the coil group, and the number of the second type sub-coils is positively correlated with the number of conductor layers of the phase winding.

3. The motor stator according to claim 1, characterized in that: The conductor layers of the multi-layer phase winding formed in the core slot are 2 layers, and each coil group includes the first type sub-coil and the third type sub-coil, and the first type sub-coil and the third type sub-coil are connected in sequence.

4. The motor stator according to claim 1, characterized in that: The phase windings are arranged in the core slots at uniform intervals along the circumference of the stator core, and the branches are arranged in the core slots at uniform intervals along the circumference of the stator core.

5. The motor stator according to claim 1, characterized in that: The motor stator further includes a phase lead wire and a neutral point lead wire, wherein the phase lead wire is the first sub-coil in each winding branch, and the neutral point lead wire is the last sub-coil in each winding branch.

6. A motor, characterized in that: The motor comprises the motor stator according to any one of claims 1-5.

7. A vehicle, characterized in that: The vehicle comprises the electric machine of claim 6.

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