electric machine

Abstract

This application provides an electric motor, characterized in that it includes a drive component and a bus assembly. The drive component includes a stator assembly, which includes a first phase winding, a second phase winding, and a third phase winding. The bus assembly includes a first bus bar, a second bus bar, a third bus bar, and a mounting bracket. The first phase winding is connected to the first bus bar, the second phase winding is connected to the second bus bar, and the third phase winding is connected to the third bus bar. The mounting bracket includes a frame with an insertion port located on one axial side of the frame. The frame has a first slot, a second slot, and a third slot. The insertion port communicates with at least one of the first slot, the second slot, and the third slot. The first bus bar is at least partially located in the first slot, the second bus bar is at least partially located in the second slot, and the third bus bar is at least partially located in the third slot, to facilitate motor assembly.

Description

Technical Field

[0001] This application relates to the field of drive device technology, and more particularly to an electric motor. Background Technology

[0002] The related technology motor includes a busbar assembly and a stator assembly. The windings of the stator assembly are connected to the busbar assembly. The busbar assembly includes multiple busbars. In order to avoid short circuits and other situations, the busbars of different phases need to keep away from each other, that is, they cannot be in direct contact. Therefore, the related technology uses a plastic coating process to coat multiple busbars together. In the manufacturing process, each busbar needs to be placed in a predetermined position using external tooling before plastic coating. The assembly process is relatively complex and cumbersome, which in turn makes the motor assembly more complicated. Summary of the Invention

[0003] This application provides a motor that is easy to assemble.

[0004] This application provides an electric motor, including a drive component and a bus assembly. The drive component includes a stator assembly, which includes a first phase winding, a second phase winding, and a third phase winding. The bus assembly includes a first bus bar, a second bus bar, a third bus bar, and a mounting bracket. The first phase winding is connected to the first bus bar, the second phase winding is connected to the second bus bar, and the third phase winding is connected to the third bus bar. The mounting bracket includes a frame with an insertion port located on one axial side of the frame. The frame has a first slot, a second slot, and a third slot. The insertion port communicates with at least one of the first slot, the second slot, and the third slot. The first bus bar is at least partially located in the first slot, the second bus bar is at least partially located in the second slot, and the third bus bar is at least partially located in the third slot.

[0005] In the motor provided by this application, the busbar assembly includes a first busbar, a second busbar, a third busbar, and a mounting bracket. The mounting bracket includes a frame with an inlet, a first slot, a second slot, and a third slot. The inlet communicates with at least one of the first slot, the second slot, and the third slot. The first busbar, the second busbar, and the third busbar are respectively located in the first slot, the second slot, and the third slot. That is, the first busbar, the second busbar, and the third busbar can be assembled to the mounting bracket, which facilitates the assembly of the motor. Attached Figure Description

[0006] Figure 1 This is a three-dimensional structural diagram of the connection between a stator assembly and a bus assembly according to this application;

[0007] Figure 2 This is a schematic diagram of the axial cross-sectional planar structure of an electric motor according to this application;

[0008] Figure 3 Is it like this? Figure 1 A three-dimensional structural diagram of the shown busbar assembly;

[0009] Figure 4 Is it like this? Figure 3 The exploded view of the busbar assembly shown is shown.

[0010] Figure 5 Is it like this? Figure 3 A partial three-dimensional structural schematic diagram of the shown busbar assembly;

[0011] Figure 6 Is it like this? Figure 5 A schematic diagram of the planar view structure of the busbar assembly shown;

[0012] Figure 7 Is it like this? Figure 5 A schematic diagram of the three-dimensional structure of the three busbars of the shown busbar assembly;

[0013] Figure 8 Is it like this? Figure 5 A three-dimensional structural diagram of the first busbar, the second busbar, and the frame is shown.

[0014] Figure 9 Is it like this? Figure 5 A three-dimensional structural diagram of the frame shown;

[0015] Figure 10 Is it like this? Figure 9 A partial sectional view of the frame structure shown.

[0016] Figure 11 Is it like this? Figure 9 A schematic diagram of the planar structure of the frame shown;

[0017] Figure 12 Is it like this? Figure 4 A schematic diagram of the three-dimensional structure of the cover shown;

[0018] Figure 13 Is it like this? Figure 12 A three-dimensional structural diagram of the cover and the third busbar shown;

[0019] Figure 14 Is it like this? Figure 12 A three-dimensional sectional view of the cover and the second busbar shown.

[0020] Figure 15 Is it like this? Figure 1 A schematic diagram of the star connection method for the motor shown;

[0021] Figure 16 Is it like this? Figure 1 The diagram shows the connection method of the stator and windings. Detailed Implementation

[0022] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0023] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the technical solutions in this application without inventive effort are within the scope of protection of this application.

[0024] The technical solutions described in this application should be understood by those skilled in the art. For example, directional descriptions such as "front," "back," "left," "right," "up," and "down" are only used to describe the relationship between objects and are not substantive limitations. "Multiple" means at least two or more.

[0025] In existing motors, the stator assembly typically uses a PCB board to connect the winding ends. However, high-current PCBs require copper embedding, which is very costly; sometimes, the cost of the PCB is even higher than the motor itself. In related technologies, some motors use BUSBAR busbars instead of PCB boards. The BUSBAR busbar connects the winding ends, and it includes multiple busbars. The leads of the busbars connect to the stator windings. Since the stator windings are divided into three phases, the multiple busbars are also divided into three phase busbars, with the windings of corresponding phases connected to the busbars. To avoid short circuits, the busbars between different phases must avoid direct contact. Therefore, in related technologies, the busbars are arranged in layers at axial intervals, and then embedded in a plastic-coated component. The internal design of the plastic part has a problem: the axial thickness of the BUSBAR busbar is too large. When the BUSBAR busbar is installed on the stator section, it further increases the axial length of the motor. On the one hand, this does not conform to the current trend of miniaturized motors, and on the other hand, it increases the overall weight of the motor. Therefore, the problem of excessive axial thickness of the BUSBAR busbar is solved by distributing multiple busbars in a cross-staggered manner. However, in the manufacturing process, it is necessary to first fix the placement of each busbar with external tooling before performing plastic coating, embedding, etc., making the assembly process relatively complex and cumbersome.

[0026] To solve the above problems, the following will refer to Figures 1 to 15 The technical solution of this application may be described in whole or in part by way of the above.

[0027] Please refer to the following first. Figures 1 to 5As shown, this application provides a motor, including a drive component 1 and a busbar assembly 2. The drive component 1 includes a stator assembly 11, which includes a first phase winding 111, a second phase winding 112, and a third phase winding 113. The busbar assembly 2 includes a first busbar 21, a second busbar 22, a third busbar 23, and a mounting bracket 25. The first phase winding 111 is connected to the first busbar 21, the second phase winding 112 is connected to the second busbar 22, and the third phase winding 113 is connected to the third busbar 23. The mounting bracket 25 includes a frame 251, which has an inlet 251a located on one axial side of the frame 251. The frame 251 has a first slot 2511, a second slot 2512, and a third slot 2513. The slot 2513 and the inlet 251a are connected to at least one of the first slot 2511, the second slot 2512, and the third slot 2513. The first slot 2511, the second slot 2512, and the third slot 2513 are at least partially isolated. Along the circumference and axial direction of the mounting bracket 25, the first slot 2511, the second slot 2512, and the third slot 2513 are partially staggered. The first busbar 21 can be axially inserted from the inlet 251a into the first slot 2511, the second busbar 22 can be axially inserted from the inlet 251a into the second slot 2512, and the third busbar 23 can be axially inserted from the inlet 251a into the third slot 2513. 13. The first busbar 21 is at least partially located in the first slot 2511, the second busbar 22 is at least partially located in the second slot 2512, and the third busbar 23 is at least partially located in the third slot 2513. Compared with the related technology that uses external tooling to assist in processing and assembly, the busbar assembly of this application includes a mounting bracket 25. The frame 251 of the mounting bracket 25 has an inlet 251a, a first slot 2511, a second slot 2512, and a third slot 2513 to facilitate the assembly of the first busbar 21, the second busbar 22, and the third busbar 23. The mounting bracket 25 has cross-staggered first slots 2511, second slots 2512, and third slots 2513, and the first slots 2511, second slots 2512, and third slots 2513 are at least partially located in the third slot 2513. Partial isolation is achieved by simply placing the first busbar 21, the second busbar 22, and the third busbar 23 into their corresponding slots. This not only satisfies the requirement that the first busbar 21, the second busbar 22, and the third busbar 23 are staggered and avoid contact with each other, but also reduces the thickness of the busbar assembly in the axial direction, thereby reducing the overall axial dimension of the motor. More importantly, the busbar assembly is easy to assemble and process, which is conducive to standardized production. In addition, the first slot 2511, the second slot 2512, and the third slot 2513 of the frame 251 can be formed by processes such as injection molding, forging, and grinding. Since the frame 251 in this embodiment is made of plastic, it is formed by injection molding, which will be further described in detail below.After placing the first busbar 21, the second busbar 22, and the third busbar 23 into the first slot 2511, the second slot 2512, and the third slot 2513 respectively, they can be connected and closed to the frame 251 via the cover 252. Then, the first busbar 21, the second busbar 22, and the third busbar 23 can be embedded and fixed to the mounting bracket 25, or fixed by sealing with glue, etc., to fix the first busbar 21, the second busbar 22, and the third busbar 23 to the first slot 2511, the second slot 2512, and the third slot 2513 of the frame respectively. Alternatively, they can be sealed together with the stator assembly using glue. In other words, during installation, the first busbar 21, the second busbar 22, and the third busbar 23 are first placed into the first slot 2511, the second slot 2512, and the third slot 2513, respectively. The placement positions of the first busbar 21, the second busbar 22, and the third busbar 23 are pre-positioned using the first slot 2511, the second slot 2512, and the third slot 2513. Then, the first busbar 21, the second busbar 22, and the third busbar 23 are welded to the three-phase windings respectively. Finally, the busbar assembly and the stator assembly are sealed and fixed together with potting compound, simplifying the assembly process and facilitating assembly.

[0028] Furthermore, in this embodiment, such as Figure 10 As shown, the inlet 251a includes a first inlet a-1, a second inlet a-2 and a third inlet a-3. The first inlet a-1 is connected to the first slot 2511, the second inlet a-2 is connected to the second slot 2512, and the third inlet a-3 is connected to the third slot 2513. That is, each inlet corresponds to a slot, so that different busbars can be installed into different slots.

[0029] Specifically, see Figure 9 and Figure 10As shown, the second slot 2512 has a first slot 1-1 and a second slot 1-2, which are connected. The second slot 1-2 is connected to the first slot 2511. In this embodiment, since the first slot 2511 is partially connected to the second slot 1-2, it means that when the first busbar 21 is installed in the first slot 2511, part of the first busbar 21 is located in the second slot 1-2. This is equivalent to the second slot 1-2 being a shared slot. Therefore, part of the first busbar 21 is located in the second slot 1-2, and part of the second busbar 22 is also located in the second slot 1-2. To avoid contact between the first busbar 21 and the second busbar 22, the mounting bracket 25... Axially, the depth of the second groove 1-2 is greater than that of the first groove 2511. The clearance Q between the portion of the second busbar 22 and the first busbar 21 located in the second groove 1-2 means that although a portion of the first busbar 21 and a portion of the second busbar 22 share the second groove 1-2, because the depth of the second groove 1-2 is greater than that of the first groove 2511, a portion of the first busbar 21 is located near the opening of the second groove 1-2, while a portion of the second busbar 22 is located near the bottom of the second groove 1-2. Therefore, there is a certain clearance between the first busbar 21 and the second busbar 22, preventing direct contact and avoiding short circuits. Furthermore, please refer again to... Figure 9 As shown, in this embodiment, the second groove 2512 has two first groove segments 1-1 and one second groove segment 1-2, wherein the second groove segment 1-2 is located between the two first groove segments 1-1, and the first groove segments 1-1 and the second groove segment 1-2 are transitionally connected, specifically from... Figure 9It can be seen that there is a transitional downward slope from the bottom surface of the first section 1-1 to the bottom surface of the second section 1-2, and a transitional upward slope from the bottom surface of the second section 1-2 to the bottom surface of the other section of the first section 1-1. That is, the bottom surface of the second section 1-2 is equivalent to the depression surface 2-3. Specifically, at least a portion of the first groove 2511 is arranged along the circumference of the mounting bracket 25, the first groove 2511 is concave along the axial direction of the mounting bracket 25, and the first groove 2511 has a first groove bottom surface 2-1. At least a portion of the second groove 2512 is arranged along the circumference of the mounting bracket 25, the second groove 2512 is concave along the axial direction of the mounting bracket 25, and the second groove 2512 has a second groove bottom surface 2-2 and... The low-lying surface 2-3, the bottom surface of the first groove 2-1 and the bottom surface of the second groove 2-2 are on the same horizontal plane as the axis of the vertical mounting bracket 25. The bottom surface of the second groove 2-2 is located in the first section groove 1-1, and the low-lying surface 2-3 is located in the second section groove 1-2. The low-lying surface 2-3 is set to increase the groove depth of the second section groove 1-2. When the second busbar 22 is partially attached to the low-lying surface 2-3, it can avoid contact with the first busbar 21. Furthermore, in order to make the bottom surface of the first section groove 1-1 and the bottom surface of the first groove 2511 on the same horizontal plane, the second section groove 1-2 is bent radially along the frame 251, so that one section of the first section groove 1-1 is located outside the first groove 2511.

[0030] To adapt to the groove shape of the first section 1-1 and the second section 1-2 of the second groove 2512, and to avoid the first busbar 21, please refer to Figures 4 to 8 As shown, the second busbar 22 includes a first main body 221 and a first bent portion 222. The first main body 221 and the first bent portion 222 are an integral part. In this embodiment, the integral part should be understood as a non-assembled connection. The substrate can be processed by casting, forging, stamping, extrusion, metal injection molding, metal powder metallurgy, etc., and then processed by machining. Alternatively, the integral part can be directly processed by embedding, casting, forging, stamping, extrusion, metal injection molding, metal powder metallurgy, etc. In some applications, the effect is directly related. When using an integral extrusion molding method, the interpretation of "integrated part" can be adjusted as appropriate. In addition, the first main body 221 is at least partially located in the first groove 1-1, the first bent portion 222 is at least partially located near the bottom of the second groove 1-2, and a portion of the first busbar 21 is located near the opening of the second groove 1-2. Along the axial direction of the mounting bracket 25, the first busbar 21 is partially misaligned with the first bent portion 222. In this embodiment, the first bent portion 222 is in close contact with the low-lying surface 2-3. Furthermore, in this embodiment, the second busbar 22 includes two sections of the first main body 221 and one section of the first bent portion 222, with the first bent portion 222 located between the two sections of the first main body 221.

[0031] Please see Figure 5 , Figure 6 as well as Figure 9 and Figure 10 The third slot 2513 is arranged circumferentially along the mounting bracket 25. The axial radius R1 of the third slot 2513 and the mounting bracket 25 is greater than the axial radius R2 of the first slot 2511 and the mounting bracket 25. That is, along the radial direction of the frame 251, the third slot 2513 is offset from the first slot 2511 and the second slot 2512 to prevent the third busbar 23 installed in the third slot 2513 from contacting the first busbar 21 installed in the first slot 2511 and the second busbar 22 installed in the second slot 2512. Furthermore, to avoid the third busbar 23 from contacting the first busbar 21 and the second busbar 22, in this embodiment, please refer again to Figure 5 and Figure 9 As shown, the third slot 2513 includes a third segment slot 1-3 and a fourth segment slot 1-4. A portion of the third busbar 23 is located in the third segment slot 1-3, and a portion of the third busbar 23 is located in the fourth segment slot 1-4. The third segment slot 1-3 and the fourth segment slot 1-4 are connected. The first slot 2511 is connected to the fourth segment slot 1-4, and the first segment slot 1-1 is connected to the fourth segment slot 1-4. In this embodiment, since a portion of the first slot 2511 is connected to the fourth segment slot 1-4, and a portion of the first segment slot 1-1 is connected to the fourth segment slot 1-4, it indicates that when the first busbar 21 is installed in the first slot 2511, a portion of the first busbar 21 is located in the fourth segment slot 1-4. When the second busbar 22 is installed in the second slot 2512, a portion of the second busbar 22 is also located in the fourth segment slot 1-4. This is equivalent to the fourth segment slot 1-4 being a shared slot. Therefore, a portion of the first busbar 21 is located within the fourth segment slot 1-4, and a portion of the second busbar 22 is also located within the fourth segment slot 1-4. Within the fourth segment 1-4, a portion of the third busbar 23 is also located within the fourth segment 1-4. To prevent the first busbar 21, the second busbar 22, and the third busbar 23 from contacting each other, the depth of the fourth segment 1-4 is greater than the depth of the first slot 2511 and the first segment 1-1 along the axial direction of the mounting bracket 25, similar to the depth of the second segment 1-2. Since the depth of the fourth segment 1-4 is greater than the depth of the first slot 2511 and the first segment 1-1, a portion of the first busbar 21 is positioned near the opening of the fourth segment 1-4, a portion of the second busbar 22 is positioned near the opening of the fourth segment 1-4, and a portion of the third busbar 23 is positioned near the bottom of the fourth segment 1-4. Therefore, there is a certain degree of clearance between the first busbar 21, the second busbar 22, and the third busbar 23, preventing direct contact and avoiding short circuits. Further details can be found in the following sections. Figure 9 As shown, the third groove 2513 includes two third groove segments 1-3 and one fourth groove segment 1-4. The fourth groove segment 1-4 is located between the two third groove segments 1-3, and the two third groove segments 1-3 and the one fourth groove segment 1-4 are seamlessly connected. Figure 9 It can be seen that there is a transitional downslope surface from the bottom surface of one section of the third trough 1-3 to the bottom surface of the fourth trough 1-4, and then there is a transitional upslope surface from the bottom surface of the fourth trough 1-4 to the bottom surface of another section of the third trough 1-3. That is, the bottom surface of the fourth trough 1-4 is equivalent to a low-lying surface. The low-lying surface is also set to increase the depth of the fourth trough 1-4. When part of the third busbar 23 is in contact with the low-lying surface, it can avoid contact with the first busbar 21 and the second busbar 22.

[0032] To accommodate the slot shapes of the third segment 1-3 and the fourth segment 1-4 of the third slot 2513, and to avoid obstructing the first busbar 21 and the second busbar 22, please refer to [link / reference needed]. Figure 5 and Figure 7 As shown, the third busbar 23 includes a second main body 231 and a second bent portion 232, wherein the second main body 231 and the second bent portion 232 are integral parts. The second bent portion 232 is at least partially located in the fourth groove 1-4, the second main body 231 is at least partially located in the third groove 1-3, the first busbar 21 is partially located in the fourth groove 1-4, and the second busbar 22 is partially located in the fourth groove 1-4. Along the axial direction of the mounting bracket 25, the first busbar 21 is partially misaligned with the second bent portion 232. The second busbar 22 is partially misaligned with the second bend 232. Along the circumference of the mounting bracket 25, the first busbar 21 and the second busbar 22 are misaligned. In this embodiment, the second bend 232 is in close contact with the low-lying surface of the fourth section groove 1-4. In this embodiment, the third busbar 23 includes two second main body sections 231 and one second bend 232. The second bend 232 is located between the two second main body sections 231. The two second main body sections 231 are respectively located in the two third section grooves 1-3.

[0033] Additionally, in this embodiment, please refer again. Figures 4 to 8 As shown, the bus assembly 2 includes a fourth bus bar 24, which is a neutral bus bar. In this embodiment, its windings adopt a star connection, also known as a Y connection, as shown below. Figure 14 and 15As shown, the advantages of star connection are reduced inter-winding current and lower copper losses, thereby improving motor operating efficiency. Furthermore, in star connection, if one phase winding fails, the motor can continue to run without immediate stoppage, thus protecting it from overload damage to some extent. The frame 251 has a fourth type slot 2514, with the fourth busbar 24 at least partially located in the fourth type slot 2514. The fourth type slot 2514 is an annular slot, and the fourth type slot 2514 is connected to the mounting bracket. The axial radius R3 of the third groove 2513 is greater than the axial radius R1 of the mounting bracket 25. The purpose is that, along the radial direction of the bracket 251, the fourth groove 2514 is offset from the first groove 2511, the second groove 2512 and the third groove 2513, so as to prevent the fourth busbar 24 installed in the fourth groove 2514 from contacting the first busbar 21 installed in the first groove 2511, the second busbar 22 installed in the second groove 2512 and the third busbar 23 installed in the third groove 2513.

[0034] The frame 251 is made of a different material than the first busbar 21, the second busbar 22, and the third busbar 23. The frame 251 is made of one or more materials, such as plastic or rubber. The first busbar 21, the second busbar 22, and the third busbar 23 are all made of metal. The frame is made of plastic or rubber mainly to provide insulation between the first busbar 21, the second busbar 22, the third busbar 23, and the fourth busbar 24, and to prevent short circuits caused by indirect contact between the busbars.

[0035] As mentioned above, the first busbar 21, the second busbar 22, and the third busbar 23 can be embedded and fixed to the mounting bracket 25 after the cover 252 is connected and closed to the frame 251, or fixed by potting glue to seal them, thereby fixing the first busbar 21, the second busbar 22, and the third busbar 23 to the first groove 2511, the second groove 2512, and the third groove 2513 of the frame respectively. In this embodiment, please refer to... Figure 4 , Figures 11 to 13As shown, the frame 251 is an annular disk. The mounting bracket 25 includes a cover 252, which is connected to the frame 251. The cover 252 is made of the same material as the frame 251. The cover 252 is an annular disk and includes a plate portion 2521 and a protrusion portion 2522. The first busbar 21, the second busbar 22, and the third busbar 23 are at least partially located between the plate portion 2521 and the frame 251. The protrusion portion 2522 is located on the side of the plate portion 2521 facing the frame 251. The protrusion portion 2522 is in contact with one or more of the first busbar 21, the second busbar 22, the third busbar 23, and the fourth busbar 24. The protrusion portion 2522 is provided to assist in pressing against the first busbar 21, the second busbar 22, the third busbar 23, and the fourth busbar 24. The busbar 24 serves to prevent the four components from moving and contacting each other within the mounting bracket 25 during assembly, thus acting as a limiting element. On the other hand, the protrusion 2522 can press and shape the second busbar 22 and the third busbar 23 to form the first bent portion 222 and the second bent portion 232. In other words, before installation, the second busbar 22 and the third busbar 23 do not have the first bent portion 222 and the second bent portion 232. After passing through the second groove 2512 and the third groove 2513, and after the cover 252 is closed, the protrusion 2522 presses and shapes the second busbar 22 and the third busbar 23 respectively, thereby giving the second busbar 22 the corresponding first bent portion 222 and the third busbar 23 the corresponding second bent portion 232.

[0036] The frame 251 has multiple ports 2515 distributed circumferentially along the mounting bracket 25. The first busbar 21 includes a first lead-out end 211, the second busbar 22 includes a second lead-out end 223, the third busbar 23 includes a third lead-out end 233, and the fourth busbar 24 includes a fourth lead-out end 241. The first lead-out end 211, the second lead-out end 223, the third lead-out end 233, and the fourth lead-out end 241 extend from the multiple ports 2515 and protrude outside the frame 251, so that the first lead-out end 211, the second lead-out end 223, the third lead-out end 233, and the fourth lead-out end 241 extend from the ports 2515 and connect to the three-phase winding.

[0037] Please see Figure 14 and Figure 15As shown, in this embodiment, the motor windings are connected in a star configuration. Taking one phase of the three-phase winding as an example, the stator assembly of this motor has a total of 12 stator cores. Two stator cores, such as A1 and A2, are connected in series by a single enameled wire, leading out two terminals. One terminal is the input terminal, and the other is the output terminal. The output terminal is connected to one of the fourth leads 241 of the fourth busbar 24. Similarly, A3 and A4 are connected in the same way, as are the other two phases. Of course, in some other embodiments, a delta connection can be used. If a delta connection is used, there is no need to add a fourth busbar 24.

[0038] The functions and structural principles of this invention have been demonstrated and explained in the embodiments.

[0039] The above examples illustrate the principles and implementation methods of the present invention. These embodiments are merely illustrative and intended to aid in understanding the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An electric motor, characterized in that, The device includes a drive component (1) and a bus assembly (2). The drive component (1) includes a stator assembly (11), which includes a first phase winding (111), a second phase winding (112), and a third phase winding (113). The bus assembly (2) includes a first bus bar (21), a second bus bar (22), a third bus bar (23), and a mounting bracket (25). The first phase winding (111) is connected to the first bus bar (21), the second phase winding (112) is connected to the second bus bar (22), and the third phase winding (113) is connected to the third bus bar (23). The mounting bracket (25) includes a frame (251) having an inlet (251a) located on one axial side of the frame (251). The frame (251) has a first groove (2511), a second groove (2512), and a third groove (2513). The inlet (251a) communicates with at least one of the first groove (2511), the second groove (2512), and the third groove (2513). The first busbar (21) is at least partially located in the first groove (2511), the second busbar (22) is at least partially located in the second groove (2512), and the third busbar (23) is at least partially located in the third groove (2513).

2. The motor according to claim 1, characterized in that, The placement port (251a) includes a first placement port (a-1), a second placement port (a-2), and a third placement port (a-3). The first placement port (a-1) is connected to the first slot (2511), the second placement port (a-2) is connected to the second slot (2512), and the third placement port (a-3) is connected to the third slot (2513).

3. The motor according to claim 1 or 2, characterized in that, The first groove (2511), the second groove (2512), and the third groove (2513) are at least partially isolated from each other. Along the axial direction of the mounting bracket (25), the first groove (2511), the second groove (2512), and the third groove (2513) are partially misaligned. Along the circumferential direction of the mounting bracket (25), the first groove (2511), the second groove (2512), and the third groove (2513) are at least partially misaligned.

4. The motor according to claim 3, characterized in that, The second groove (2512) has a first groove (1-1) and a second groove (1-2), the first groove (1-1) and the second groove (1-2) are connected, the second groove (1-2) is connected to the first groove (2511), along the axial direction of the mounting bracket (25), the groove depth of the second groove (1-2) is greater than the groove depth of the first groove (2511), and there is a clearance gap (Q) between the second busbar (22) and the first busbar (21) located in the second groove (1-2).

5. The motor according to claim 4, characterized in that, At least a portion of the first groove (2511) is arranged circumferentially along the mounting bracket (25), the first groove (2511) is recessed axially along the mounting bracket (25), the first groove (2511) has a first groove bottom surface (2-1), at least a portion of the second groove (2512) is arranged circumferentially along the mounting bracket (25), the second groove (2512) is recessed axially along the mounting bracket (25), the second groove (2512) has a second groove bottom surface (2-2) and a low-lying surface (2-3), the first groove bottom surface (2-1) and the second groove bottom surface (2-2) are on the same horizontal plane perpendicular to the axis of the mounting bracket (25), the second groove bottom surface (2-2) is located in the first section groove (1-1), and the low-lying surface (2-3) is located in the second section groove (1-2).

6. The motor according to claim 4, characterized in that, The second busbar (22) includes a first main body (221) and a first bent portion (222). The first main body (221) is at least partially located in the first section groove (1-1), and the first bent portion (222) is at least partially located near the bottom of the second section groove (1-2). A portion of the first busbar (21) is located near the opening of the second section groove (1-2). Along the axial direction of the mounting bracket (25), a portion of the first busbar (21) is misaligned with the first bent portion (222).

7. The motor according to any one of claims 4 to 6, characterized in that, The third groove (2513) is arranged circumferentially along the mounting bracket (25). The axial radius (R1) of the third groove (2513) and the mounting bracket (25) is greater than the axial radius (R2) of the first groove (2511) and the mounting bracket (25). The third groove (2513) includes a third section groove (1-3) and a fourth section groove (1-4) along the axial direction of the mounting bracket (25). The groove depth of the fourth section groove (1-4) is greater than that of the first section groove (2511). The groove depth of the groove (2511) and the groove depth of the first section groove (1-1), the third section groove (1-3) is connected to the fourth section groove (1-4), the first groove (2511) is connected to the fourth section groove (1-4), the first section groove (1-1) is connected to the fourth section groove (1-4), the third busbar (23) is partially located in the third section groove (1-3), and the third busbar (23) is partially located in the fourth section groove (1-4).

8. The motor according to claim 7, characterized in that, The third busbar (23) includes a second main body (231) and a second bent portion (232). The second bent portion (232) is at least partially located in the fourth groove (1-4). The second main body (231) is at least partially located in the third groove (1-3). The first busbar (21) is partially located in the fourth groove (1-4). The second busbar (22) is partially located in the fourth groove (1-4). Along the axial direction of the mounting bracket (25), the first busbar (21) is partially misaligned with the second bent portion (232). The second busbar (22) is partially misaligned with the second bent portion (232). Along the circumferential direction of the mounting bracket (25), the first busbar (21) and the second busbar (22) are misaligned.

9. The motor according to any one of claims 4 to 8, characterized in that, The busbar assembly (2) includes a fourth busbar (24), the frame (251) has a fourth groove (2514), the inlet (251a) has a fourth inlet (a-4), the fourth inlet (a-4) communicates with the fourth groove (2514), the fourth busbar (24) is at least partially located in the fourth groove (2514), the fourth groove (2514) is an annular groove, and the axial radius (R3) of the fourth groove (2514) and the mounting bracket (25) is greater than the axial radius (R1) of the third groove (2513) and the mounting bracket (25).

10. The motor according to any one of claims 4 to 8, characterized in that, The frame (251) is made of a different material than the first busbar (21), the second busbar (22) and the third busbar (23). The frame (251) is made of one or more of plastic or rubber materials, while the first busbar (21), the second busbar (22) and the third busbar (23) are all made of metal.

11. The motor according to claim 9, characterized in that, The frame (251) is an annular disk. The mounting bracket (25) includes a cover (252), which is connected to the frame (251). The cover (252) is made of the same material as the frame (251). The cover (252) is an annular disk. The cover (252) includes a plate portion (2521) and a protrusion portion (2522). The first busbar (21), the second busbar (22), and the third busbar are at least partially located between the plate portion (2521) and the frame (251). The protrusion portion (2522) is located on the side of the plate portion (2521) facing the frame (251). The protrusion portion (2522) is in contact with one or more of the first busbar (21), the second busbar (22), the third busbar, and the fourth busbar (24).

12. The motor according to claim 9, characterized in that, The frame (251) has multiple ports (2515) distributed circumferentially along the mounting bracket (25). The first busbar (21) includes a first lead-out end (211), the second busbar (22) includes a second lead-out end (223), the third busbar (23) includes a third lead-out end (233), and the fourth busbar (24) includes a fourth lead-out end (241). The first lead-out end (211), the second lead-out end (223), the third lead-out end (233), and the fourth busbar (24) extend from the multiple ports (2515) and protrude from the outside of the frame (251).

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