Stator assembly and motor

Abstract

The utility model discloses a stator assembly and a motor, the stator assembly comprises a stator core, a plurality of windings and a bus board, the stator core comprises a plurality of stator teeth, the plurality of stator teeth are connected in sequence to form a ring shape, and a winding groove is defined between two adjacent stator teeth; the plurality of windings are respectively and correspondingly wound on the plurality of stator teeth and are accommodated in the plurality of winding grooves, and each winding comprises two lead ends; the confluence plate is arranged at one end of the stator core in the axial direction, the confluence plate is provided with a plurality of first wiring parts which are arranged at intervals in the circumferential direction of the stator core, the plurality of first wiring parts are correspondingly and electrically connected with the plurality of lead ends respectively, and the confluence plate comprises at least two confluence units which are sequentially arranged in the circumferential direction and are mutually disconnected; each confluence unit is provided with a first wiring part, and at least parts of the mutually disconnected confluence units are conducted through wires. The stator assembly provided by the utility model is good in manufacturability, effectively improves the production efficiency, and is low in manufacturing cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a kind of stator assembly and motor. BACKGROUND

[0002] The common means for the electrical connection of the multiple windings of the motor is generally to use wires for manual wiring or to use printed circuit boards for wiring. However, manual wiring requires connecting a large number of wires, and the wiring process is time-consuming, which leads to poor manufacturability of the motor and reduced efficiency. Using printed circuit boards for wiring increases material costs, and the material utilization rate of existing printed circuit boards is low when the boards are manufactured, which further increases costs and reduces the cost performance of the motor. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model provides a stator assembly, which has good manufacturability, effectively improves production efficiency, and has low manufacturing cost.

[0004] The utility model further provides a motor with the above stator assembly.

[0005] According to the stator assembly of the first aspect of the utility model, the stator core includes multiple stator teeth, the multiple stator teeth are connected in a ring shape in sequence, and a winding slot is defined between adjacent two stator teeth. Multiple windings are respectively wound on the multiple stator teeth and accommodated in the multiple winding slots. Each winding includes two lead terminals. A bus bar is arranged at one end of the stator core along the axial direction. The bus bar is provided with multiple first wiring parts arranged along the circumferential direction of the stator core at intervals. The multiple first wiring parts are respectively electrically connected to the multiple lead terminals. The bus bar includes at least two bus units arranged along the circumferential direction in sequence and disconnected from each other. Each bus unit is provided with the first wiring part. At least part of the disconnected bus units are connected by wires.

[0006] According to the stator assembly of the first aspect of the utility model, the bus bar is composed of at least two disconnected bus units. The lead terminals of the windings are directly electrically connected to the first wiring parts of the bus bar. Only wires need to be connected between the at least two disconnected bus units. In this way, the number of wires required for connection can be reduced, the wiring process can be simplified, production efficiency can be improved, and the manufacturability of the motor can be improved. At the same time, since the bus bar is composed of at least two disconnected bus units, the layout of the material during the manufacture of the bus bar can be optimized to improve the utilization rate of the material, thereby reducing production costs and improving the cost performance of the motor.

[0007] According to some embodiments of the utility model, the conductor wire includes a first conductor wire, and two ends of the first conductor wire are respectively connected to the first wiring part of two bus units.

[0008] According to some embodiments of the utility model, one of the bus units is further provided with a plurality of second wiring parts, the plurality of second wiring parts are used for connecting with external circuits, the conductor wire includes a second conductor wire, one end of the second conductor wire is connected to one of the second wiring parts, and the other end is connected to the first wiring part of another bus unit.

[0009] According to some embodiments of the utility model, the bus plate includes two bus units, the end portions of two adjacent bus units have disconnection positions, a first included angle θ1 and a second included angle θ2 are formed between the lines connecting the centers of the stator cores at the middle positions of the two disconnection positions, and the following conditions are met: θ1 + θ2 = 360°, θ1 ≤ θ2, and 150° ≤ θ1 ≤ 180°.

[0010] According to some embodiments of the utility model, the number of conductor wires is less than or equal to four.

[0011] According to some embodiments of the utility model, the bus plate includes three bus units, the end portions of two adjacent bus units have disconnection positions, and the included angles between the lines connecting the centers of the stator cores at the middle positions of the three disconnection positions are all greater than or equal to 110° and less than or equal to 130°.

[0012] According to some embodiments of the utility model, the number of conductor wires is less than or equal to six.

[0013] According to some embodiments of the utility model, the bus plate is provided with a plurality of conductive layers, the plurality of conductive layers are arranged in a stacked manner along the axial direction of the stator core, each first wiring part is in conduction with at least one conductive layer, and each conductive layer is in conduction with at least one first wiring part.

[0014] According to some embodiments of the utility model, the stator assembly further includes an insulating frame installed on each stator tooth, two conductive columns are installed on each insulating frame, the two conductive columns are connected to the two lead ends of the corresponding winding, and a plurality of conductive columns are respectively connected to a plurality of first wiring parts.

[0015] The motor according to the second aspect of the utility model comprises the stator assembly according to the first aspect of the utility model.

[0016] The motor according to the second aspect of the present utility model has at least the following beneficial effects: the motor adopts the stator assembly, the bus board is composed of at least two mutually disconnected bus units, the lead end of the winding is directly electrically connected with the first wiring part of the bus board, and only the wires need to be connected between the at least two mutually disconnected bus units, so that the number of wires to be connected can be reduced, the wiring process is simplified, the production efficiency is improved, and the manufacturability of the motor is improved. At the same time, since the bus board is composed of at least two mutually disconnected bus units, the layout of the material during the manufacturing of the bus board can be optimized to improve the utilization rate of the material, thereby reducing the production cost and improving the performance-price ratio of the motor.

[0017] Additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present utility model will be further described below in combination with the drawings and embodiments, wherein:

[0019] Figure 1 is a structure schematic view of the stator assembly in the embodiments of the present utility model;

[0020] Figure 2 is a schematic view of the connection of the bus board and the wire in the embodiments of the present utility model;

[0021] Figure 3 is Figure 2 a material layout schematic view of the bus unit of the bus board shown in the figure;

[0022] Figure 4 is Figure 2 a schematic view of the first conductive layer of the bus board shown in the figure;

[0023] Figure 5 is Figure 2 a schematic view of the second conductive layer of the bus board shown in the figure;

[0024] Figure 6 is Figure 2 a schematic view of the third conductive layer of the bus board shown in the figure;

[0025] Figure 7 is Figure 2 a schematic view of the fourth conductive layer of the bus board shown in the figure;

[0026] Figure 8 is a schematic view of the connection of the bus board and the wire in other embodiments of the present utility model;

[0027] Figure 9 is Figure 8 a material layout schematic view of the bus unit of the bus board shown in the figure;

[0028] Figure 10 Fig. 1 is a structure schematic diagram of a part of structure combination of a stator tooth and a winding and an insulation frame in an embodiment of the present application;

[0029] Figure 11 Fig. 2 is a wiring schematic diagram of a winding in an embodiment of the present application;

[0030] Figure 12 Fig. 3 is a column chart of comparison between a required board material area of a bus plate and a required board material area of a printed circuit board in an embodiment of the present application.

[0031] Reference signs:

[0032] Stator core 100; Stator tooth 110; Winding 120; Lead end 121;

[0033] Bus plate 200; Bus unit 210; Disconnection position 220; First wiring part 230; Second wiring part 240; First conductive layer 250; Second conductive layer 260; Third conductive layer 270; Fourth conductive layer 280;

[0034] Wire 300; First wire 310; Second wire 320;

[0035] Insulation frame 400; Conductive column 410;

[0036] Board material 500. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent 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 cannot be understood as a limitation of the present application.

[0038] In the description of the present application, it is understood that, in relation to the position description, for example, the position or location relationship indicated by the upper, lower, front, rear, left, right and the like is based on the position or location relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and cannot be understood as a limitation of the present application, which indicates or implies that the device or element must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation of the present application.

[0039] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If it is described to the first, second, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0040] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection, assembly, cooperation and the like should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0041] The plurality of windings of the stator of the motor is generally connected in star connection, delta connection or other connection to form a three-phase AC winding system, which is a system composed of the plurality of windings of the AC motor after connection, and the three-phase AC winding system can generate a rotating magnetic field when connected with a three-phase circuit. The common means for electrical connection between windings generally includes direct connection through wires or connection through a printed circuit board. For the scheme of direct connection between windings through wires, each wire is generally connected to only two lead terminals, and a large number of wires are required, for example, eighteen wires are usually required to be connected, and the connection is usually made by manual wiring, which is low in efficiency, resulting in long time consumption of the overall wiring process and poor manufacturability of the motor.

[0042] For the scheme of connection between windings only through a printed circuit board, the material cost of the printed circuit board itself is high, and the printed circuit board is usually a complete annular structure. The printed circuit board is composed of a substrate and a copper foil layer arranged on the substrate. The substrate is a complete annular structure, and the copper foil layer can be a complete annular structure or a plurality of arc structures arranged separately and blocked. During the production of the material, the material at the space surrounded by the annular structure of the printed circuit board cannot be utilized, and a large amount of waste is generated during the production of the material, which is low in material utilization rate and increases the material cost, resulting in high overall manufacturing cost of the motor and low cost performance. Therefore, a motor scheme that takes into account manufacturability and cost performance is needed.

[0043] Therefore, with reference to Figures 1 to 12 The utility model provides a kind of stator assembly for motor, which is applied to motor. Generally speaking, the motor further includes a rotor assembly, and the stator assembly is arranged around the outer periphery of the rotor assembly, and the rotor assembly can rotate relative to the stator assembly.

[0044] With reference to Figure 1 It can be understood that the stator assembly includes a stator core 100, a plurality of windings 120, a bus bar 200 and a plurality of wires 300.

[0045] Referring to Figure 1 and Figure 10 It can be understood that the stator core 100 is annular and has a central axis, the circumferential direction of the stator core 100 is the direction around the central axis, and the axial direction of the stator core 100 is the direction of the central axis. Specifically, the stator core 100 includes a plurality of stator teeth 110, the plurality of stator teeth 110 are connected in sequence to form a ring, and a winding slot is defined between adjacent two stator teeth 110, that is, the number of winding slots is equal to the number of stator teeth 110, and the plurality of winding slots are arranged at intervals along the circumferential direction of the stator core 100.

[0046] It can be understood that the stator tooth 110 is a single structure, and the projection of the stator tooth 110 on a projection plane perpendicular to the central axis of the stator core 100 is substantially T-shaped. Specifically, the stator tooth 110 includes a yoke portion and a tooth portion connected to the inner side of the yoke portion, and adjacent two stator teeth 110 are connected through the yoke portion, for example, the yoke portions of adjacent two stator teeth 110 are connected through a dovetail groove structure or are welded. The side close to the central axis of the stator core 100 is the inner side, and the side away from the central axis of the stator core 100 is the outer side.

[0047] Referring to Figure 1 and Figure 10 It can be understood that the plurality of windings 120 correspond to the plurality of stator teeth 110 respectively. Specifically, the winding 120 is wound on the tooth portion of the stator tooth 110 and accommodated in the two winding slots adjacent to the stator tooth 110. In order to provide stable support for the winding 120, the stator assembly further includes a plurality of insulating frames 400, the plurality of insulating frames 400 are respectively installed on the plurality of stator teeth 110, and the insulating frame 400 covers the two end faces of the tooth portion of the stator tooth 110 which are away from each other along the axial direction of the stator core 100. The winding 120 is wound on the insulating frame 400.

[0048] Referring to Figure 1 and Figure 10 It can be understood that each winding 120 includes two lead ends 121. Specifically, the winding 120 is wound by an enameled wire, and the two ends of the enameled wire constituting the winding 120 are respectively the two lead ends 121 of the winding 120. Correspondingly, the insulating frame 400 is installed with two conductive columns 410, the conductive columns 410 are arranged to extend along the axial direction of the stator assembly, and the two conductive columns 410 are respectively connected with the two lead ends 121 of the winding 120 wound on the insulating frame 400, for example, the lead end 121 of the winding 120 is welded on the conductive column 410, or the lead end 121 of the winding 120 is wound on the conductive column 410, so as to fix the two lead ends 121 of the winding 120 and facilitate the wiring of the winding 120 and the bus bar 200.

[0049] It can be understood that, since the stator core 100 is a split structure, when assembling the stator assembly, the windings 120 can be wound on the stator teeth 110 which are a single structure first, and then the combination of the windings 120 and the stator teeth 110 is assembled into a ring shape. In this way, more enameled wires can be wound on the stator teeth 110 to increase the slot fill rate and thus increase the output power of the motor.

[0050] It can be understood that, in order to connect the plurality of windings 120 into a three-phase alternating winding system as shown in Figure 11 , the bus bar 200 and the plurality of wires 300 are connected to the plurality of windings 120. In this example, the number of windings 120 is twelve. Of course, the number of windings 120 can also be other, usually a multiple of three. Figure 11 The three-phase alternating winding system as shown adopts a star connection mode, and the four windings 120 of each phase are divided into two parallel groups, and the two windings 120 of each group are connected in series and the currents of the two windings 120 are opposite.

[0051] In other embodiments, the three-phase alternating winding system can also adopt a delta connection mode or other connection mode. The plurality of windings 120 of each phase can also be connected in series.

[0052] Referring to Figure 1 and Figure 2 , it can be understood that the bus bar 200 is installed at one end of the stator core 100 along the axial direction and is located at the leading end of the two lead ends 121 of the windings 120. Specifically, the bus bar 200 is annular and provided with a plurality of first connection parts 230, and the plurality of first connection parts 230 are located at the outer periphery of the bus bar 200 and are arranged at equal intervals in two groups along the circumferential direction of the stator core 100. Generally, the first connection part 230 is a solder pad. The number of first connection parts 230 is equal to the total number of lead ends 121 of the plurality of windings 120. In this embodiment, the number of first connection parts 230 and the number of lead ends 121 are both twenty-four. The plurality of first connection parts 230 are electrically connected one by one with the lead ends 121 of all the windings 120.

[0053] It can be understood that the bus bar 200 is composed of a substrate and a plurality of conductive layers, and the substrate can be an epoxy resin, a polyimide or a ceramic substrate, etc. The plurality of conductive layers are arranged on the substrate and are stacked along the axial direction of the stator core 100, and an insulating layer is usually arranged between adjacent two conductive layers. It is easy to understand that each conductive layer can be composed of a section of annular copper foil layer, or each conductive layer is composed of a plurality of copper foil layers arranged in sequence along the circumferential direction of the stator core 100 and blocked from each other. Depending on the connection mode of the three-phase alternating winding system.

[0054] Referring to Figures 4 to 7As shown, it can be understood that each first wiring portion 230 is in conduction with at least one conductive layer, and each conductive layer is in conduction with at least one first wiring portion 230. Specifically, in the embodiment, the number of conductive layers is four, which are a first conductive layer 250, a second conductive layer 260, a third conductive layer 270 and a fourth conductive layer 280.

[0055] Referring to Figures 4 to 7 As shown, it can be understood that the first conductive layer 250 is in conduction with a part of the first wiring portions 230, the second conductive layer 260 is in conduction with another part of the first wiring portions 230, the third conductive layer 270 is in conduction with yet another part of the first wiring portions 230, and the fourth conductive layer 280 is in conduction with the remaining part of the first wiring portions 230. Except that two first wiring portions 230 are in conduction with the first conductive layer 250 and the second conductive layer 260 at the same time, the remaining first wiring portions 230 are in conduction with only one conductive layer. In this way, the plurality of first wiring portions 230 and the plurality of conductive layers form a wiring system of the busbar 200, so as to connect the plurality of windings 120 into a three-phase alternating current winding system through the busbar 200.

[0056] Referring to Figures 4 to 7 As shown, it can be understood that the busbar 200 is also provided with a plurality of second wiring portions 240, the plurality of second wiring portions 240 are used to connect with an external three-phase circuit, and the plurality of second wiring portions 240 are arranged in one of the busbar units 210. Specifically, in the embodiment, the number of second wiring portions 240 is three, and the three second wiring portions 240 are connected with a U-phase line, a V-phase line and a W-phase line of the external three-phase circuit respectively. Generally, the second wiring portion 240 is also a solder pad. The three second wiring portions 240 are in conduction with the first conductive layer 250, the second conductive layer 260 and the third conductive layer 270 respectively.

[0057] Referring to Figure 2 and Figure 8 As shown, it can be understood that the busbar 200 includes at least two busbar units 210, each busbar unit 210 is arranged in an arc shape and extends along the circumferential direction of the stator core 100, and the at least two busbar units 210 are arranged in sequence and disconnected with each other along the circumferential direction of the stator core 100. For example, each busbar 200 is composed of two busbar units 210, or each busbar 200 is composed of three busbar units 210, etc. It can be easily understood that the at least two busbar units 210 constituting the busbar 200 are located in the same plane and arranged in sequence in a ring shape. That is to say, each busbar 200 is approximately in a disconnected ring shape, and the busbar 200 is disconnected at least twice, so that the busbar 200 is divided into at least two arc-shaped busbar units 210. Each busbar unit 210 is provided with a plurality of first wiring portions 230, so that each busbar unit 210 can be connected with the lead end 121 of the plurality of windings 120.

[0058] Since the busbar 200 is divided into at least two arc-shaped bus units 210, part of the copper foil layers in the four conductive layers will be disconnected. To this end, a wire 300 is connected between at least two disconnected bus units 210 of the busbar 200, and the end of the wire 300 is connected to the first wiring part 230 or the second wiring part 240, so that the disconnected copper foil layers are conducted due to the disconnection of the busbar 200. In this way, the plurality of windings 120 are connected into a three-phase alternating current winding system through the busbar 200 and the wire 300.

[0059] Therefore, the function of the plurality of wires 300 is replaced by the busbar 200, and only the wires 300 need to be connected between at least two disconnected bus units 210, effectively reducing the number of wires 300 required to be connected, thereby simplifying the wiring process, and further improving the production efficiency and the manufacturability of the motor.

[0060] It is easy to understand that when the busbar 200 is connected with the winding 120, the conductive column 410 connected with the lead end 121 of the winding 120 is welded and fixed with the first wiring part 230 of the busbar 200 and is conducted.

[0061] Since the busbar 200 is divided into at least two arc-shaped bus units 210, when the material 500 is arranged, one bus unit 210 can be arranged inside another bus unit 210, effectively reducing the unused material 500, so that the plurality of bus units 210 are closely arranged, thereby optimizing the layout of the material 500 when the busbar 200 is made, reducing waste, effectively improving the utilization rate of the material 500, reducing the production cost, and further improving the performance-price ratio of the stator assembly and the motor.

[0062] It can be understood that the end of the adjacent two bus units 210 in the busbar 200 has a disconnection position 220. Since the busbar 200 is divided into at least two arc-shaped bus units 210, according to the wiring needs, in the same conductive layer, if the copper foil layers located on both sides of the disconnection position 220 along the circumferential direction of the stator core 100 need to be conducted, then the copper foil layers located on both sides of the disconnection position 220 need to be conducted through the connecting wire 300; if the copper foil layers located on both sides of the disconnection position 220 along the circumferential direction of the stator core 100 are blocked, then the connecting wire 300 is not needed.

[0063] Referring to Figure 2 It can be understood that in the embodiment, the busbar 200 includes two bus units 210. Specifically, the two bus units 210 form a ring structure, and the two bus units 210 can each be a semi-ring structure, or one of the bus units 210 is a structure larger than a semi-ring, and the other bus unit 210 is a structure smaller than a semi-ring. There are two disconnection positions 220.

[0064] It can be understood that the middle positions of the two disconnection positions 220 and the lines connecting the center of the stator core 100 form a first included angle θ1 and a second included angle θ2, respectively. That is, the first included angle θ1 and the second included angle θ2 are the included angles on both sides of the two lines. Among them, in the projection plane perpendicular to the central axis of the stator core 100, if the disconnection position 220 is a region, the middle point of the line connecting the middle points of the projections of the opposite walls of the disconnection position 220 along the circumferential direction of the stator core 100 is the middle position of the disconnection position 220; if the disconnection position 220 is a disconnection seam, the middle position of the disconnection position 220 is the midpoint of the disconnection seam. The center of the stator core 100 is the projection of the central axis of the stator core 100. Generally, the sum of the first included angle θ1 and the second included angle θ2 is 360°, that is, θ1+θ2=360°, and the first included angle θ1 and the second included angle θ2 can each be 180°, or one is greater than 180° and the other is less than 180°.

[0065] Referring to Figure 2 It can be understood that the first included angle θ1 and the second included angle θ2 satisfy θ1≤θ2 and 150°≤θ1≤180°. That is, the smaller of the included angles formed between the lines connecting the middle positions of the two disconnection positions 220 and the center of the stator core 100 is 150° to 180°. For example, θ1=θ2=180°; or θ1=160°, θ2=200°; or θ1=150°, θ2=210°, etc.

[0066] It can be understood that since the central angles of the two current collecting units 210 are large, when the openings of the vertically adjacent two current collecting units 210 are arranged in the same direction during production and discharging, only a small part of the structure of one current collecting unit 210 can be arranged in the inner space of the other current collecting unit 210, the two current collecting units 210 are not closely arranged, the waste material is much, and the utilization rate of the plate material 500 is low.

[0067] Therefore, referring to Figure 3 It can be understood that during production and discharging, in the horizontal direction, the openings of the adjacent two current collecting units 210 are arranged in the same direction, in the vertical direction, the openings of the adjacent two current collecting units 210 are arranged in opposite directions and the openings face each other, and in the vertically adjacent two current collecting units 210, a section of the structure of one current collecting unit 210 is arranged in the inner space of the other current collecting unit 210. In this way, the multiple current collecting units 210 are closely arranged, the layout of the discharged material is optimized, the waste material is reduced, the utilization rate of the plate material 500 is effectively improved, the production cost is reduced, and the cost performance of the stator assembly and the motor is improved.

[0068] It is easy to understand that when θ1=θ2=180°, the multiple current collecting units 210 can be arranged more closely, the layout of the discharged material is further optimized, the utilization rate of the plate material 500 is improved, and the production cost is reduced.

[0069] Referring to Figure 2 It can be understood that the number of the connecting wires 300 required by the embodiment is less than or equal to four. Specifically, the number of the connecting wires 300 of the embodiment is three, including one first wire 310 and two second wires 320. The first wire 310 is located near the first disconnected position 220 and has two ends connected to the first connecting parts 230 of the two bus units 210, respectively. The two second wires 320 are both located near the second disconnected position 220. One end of each of the two second wires 320 is connected to the second connecting part 240 of one of the bus units 210, and the other end is connected to the first connecting part 230 of the other bus unit 210. The two second wires 320 are connected to different second connecting parts 240 and different first connecting parts 230. Therefore, the plurality of windings 120 are connected into a three-phase alternating winding system as Figure 11 shown in FIG. 6 by the two bus units 210 and the three wires 300, effectively reducing the number of the connecting wires 300 required, and the number of the wires 300 is only three, effectively simplifying the wiring process, improving the production efficiency and improving the manufacturability of the motor.

[0070] Of course, the number of the wires 300 can also be one, two or four, depending on the disconnected positions 220 of the bus plate 200.

[0071] Referring to Figure 8 It can be understood that in some other embodiments, the bus plate 200 includes three bus units 210. Specifically, the three bus units 210 form a ring structure, and each bus unit 210 is a structure smaller than a half ring. The number of the disconnected positions 220 is three.

[0072] Referring to Figure 8 It can be understood that among the lines connecting the center positions of the three disconnected positions 220 to the center of the stator core 100, the included angle between each two adjacent lines is the third included angle θ3, the fourth included angle θ4 and the fifth included angle θ5, respectively. θ3, θ4 and θ5 are all greater than or equal to 110° and less than or equal to 130°. For example, θ3 = θ4 = θ5 = 120°; or θ3 = 110°, θ4 = 120°, θ5 = 130°; or θ3 = 115°, θ4 = 115°, θ5 = 130°, etc.

[0073] Referring to Figure 9As shown, therefore, in the production of the layout, in the horizontal direction, the openings of two adjacent bus units 210 are arranged in the same direction, and in the vertical direction, the openings of two adjacent bus units 210 are also arranged in the same direction. In the vertical direction, part of the structure of one bus unit 210 is arranged in the inner space of most of the other bus unit 210. In this way, the arrangement of multiple bus units 210 is more compact, the layout of the material is optimized, the waste is reduced, the utilization rate of the plate material 500 is effectively improved, the production cost is reduced, and the cost performance of the stator assembly and the motor is improved.

[0074] It is easy to understand that when θ3=θ4=θ5=120°, the arrangement of multiple bus units 210 is more compact, the layout of the material is further optimized, the utilization rate of the plate material 500 is improved, and the production cost is reduced.

[0075] Referring to Figure 8 As shown, it can be understood that, compared with the previous embodiment, due to the increase in the disconnection position of each bus plate 200, the number of required connecting wires 300 is generally increased, but is less than or equal to six.

[0076] Referring to Figure 8 As shown, it can be understood that, specifically, this embodiment includes six wires 300, which include three first wires 310 and three second wires 320. Two of the first wires 310 are located near the first disconnection position 220, and the other first wire 310 is located near the second disconnection position 220. The two ends of the first wire 310 are respectively connected to the first connection part 230 provided on two adjacent bus units 210, and the three first wires 310 are connected to different first connection parts 230. One of the second wires 320 is located near the first disconnection position 220, and the other two second wires 320 are located near the second disconnection position 220. One end of the second wire 320 is connected to the second connection part 240 of one of the bus units 210, and the other end is connected to the first connection part 230 of the adjacent bus unit 210. At the same time, the three second wires 320 are connected to different first connection parts 230, two of the second wires 320 are connected to the same second connection part 240, and the other second wire 320 is connected to another second connection part 240. Therefore, through three bus units 210 and six wires 300, multiple windings 120 are connected to form a three-phase alternating winding system as Figure 11 As shown, the number of wires 300 required for connection is effectively reduced. The number of wires 300 is only six, which can simplify the wiring process, improve production efficiency, and improve the manufacturability of the motor.

[0077] Of course, depending on the different disconnection positions 220 of the busbar 200, the number of wires 300 can be one to five.

[0078] It is understood that in any of the above embodiments, on the projection plane perpendicular to the central axis of the stator core 100, when the disconnection position 220 is a region, the projection of the disconnection position 220 along the circumferential opposite wall of the stator core 100 or when the disconnection position 220 is a disconnection seam, the projection of the disconnection seam can be a straight line or an arc, as long as the busbar 200 is divided into at least two arc-shaped busbar units 210.

[0079] Reference Figure 3 and Figure 9 As shown, it can be understood that, compared to the complete ring structure of printed circuit boards in the prior art, when the busbar 200 in the above embodiments is divided into two busbar units 210 or three busbar units 210, the area of ​​board material 500 required to produce the busbar 200 of the above embodiments is significantly smaller than the area of ​​board material 500 required to produce printed circuit boards in the prior art. Furthermore, the area of ​​board material 500 required to produce a busbar 200 composed of three busbar units 210 is smaller than the area of ​​board material 500 required to produce a busbar 200 composed of two busbar units 210. In other words, the board material 500 utilization rate is high and the cost is low when producing the busbar 200 of the above embodiments. Moreover, the board material 500 utilization rate is even higher and the cost is even lower when producing a busbar 200 composed of three busbar units 210.

[0080] Reference Figure 12 As shown, the area of ​​the board material required to produce a single printed circuit board using existing technology is approximately 17 dm². 2 The area of ​​the sheet material 500 required to produce a single busbar 200 consisting of two busbar units 210 is approximately 14 dm². 2 It saves approximately 17% of materials compared to existing technologies, meaning material utilization is improved by about 17%; the area of ​​the sheet material 500 required to produce a single busbar 200 consisting of three busbar units 210 is approximately 10 dm². 2 This method saves approximately 40% of materials compared to existing technologies, meaning that material utilization is increased by about 40%. The amount of board material 500 used in producing the busbar 200 of the above embodiment is significantly reduced, which helps to lower costs.

[0081] The motor of the second aspect of this utility model includes the stator assembly of the first aspect of this utility model.

[0082] Since the motor adopts all the technical solutions of the stator assembly of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments.

[0083] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possesses without departing from the utility model's tenet under the precondition that the knowledge range that the person skilled in the art has possesses.

Claims

1. A stator assembly, characterized by, The stator assembly comprises: a stator core comprising a plurality of stator teeth connected in a ring shape, and a winding slot defined between two adjacent stator teeth; a plurality of windings corresponding to the plurality of stator teeth and accommodated in the winding slots, each winding comprising two lead ends; a busbar provided at one end of the stator core in the axial direction, the busbar being provided with a plurality of first connection parts arranged at intervals in the circumferential direction of the stator core, the plurality of first connection parts being electrically connected to the plurality of lead ends, respectively, the busbar comprising at least two busbar units arranged in the circumferential direction and disconnected from each other, each busbar unit being provided with the first connection parts, and at least some of the busbar units being connected by a wire.

2. The stator assembly of claim 1, wherein: The wire comprises a first wire, both ends of the first wire being connected to the first connection parts provided in two busbar units, respectively.

3. The stator assembly of claim 1, wherein: One of the busbar units is further provided with a plurality of second connection parts for connecting to an external circuit, and the wire comprises a second wire, one end of the second wire being connected to one of the second connection parts, and the other end being connected to the first connection part provided in another busbar unit.

4. The stator assembly of claim 1, wherein: The busbar comprises two busbar units, the end portions of two adjacent busbar units having a disconnection position, the middle positions of the two disconnection positions and the line connecting the centers of the stator cores forming a first included angle θ1 and a second included angle θ2, satisfying θ1+θ2=360°, θ1≤θ2, and 150°≤θ1≤180°.

5. The stator assembly of claim 4, wherein: The number of wires is less than or equal to four.

6. The stator assembly of claim 1, wherein: The busbar comprises three busbar units, the end portions of two adjacent busbar units having a disconnection position, the middle positions of the three disconnection positions and the lines connecting the centers of the stator cores, the included angle between each two adjacent lines being greater than or equal to 110° and less than or equal to 130°.

7. The stator assembly of claim 6, wherein: The number of wires is less than or equal to six.

8. The stator assembly of claim 1, wherein: The busbar is provided with a plurality of conductive layers stacked in the axial direction of the stator core, each first connection part being in electrical connection with at least one conductive layer, and each conductive layer being in electrical connection with at least one first connection part.

9. The stator assembly of claim 1, wherein: The stator assembly further comprises an insulating frame mounted on each stator tooth, each insulating frame being provided with two conductive columns, the two conductive columns being connected to the two lead ends of the corresponding winding, and the plurality of conductive columns being connected to the plurality of first connection parts, respectively.

10. An electric machine characterized by The stator assembly comprises any one of claims 1 to 9.

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