Electrical equipment, motors and their stators

Abstract

This application discloses an electric device, a motor, and a stator thereof. The stator includes a stator core and a stator winding. The inner wall of the stator core is provided with a plurality of winding slots. The stator winding includes a plurality of conductors inserted into the winding slots. The stator winding includes a first phase winding including a first branch and a second branch, where the first incoming wire end and the second incoming wire end are respectively connected to conductors on different layers in the same winding slot, and the first outgoing wire end and the second outgoing wire end are respectively connected to conductors on different layers in the same winding slot. A technical solution of an embodiment of this application can reduce the distance between the first incoming wire end and the second incoming wire end and the distance between the first outgoing wire end and the second outgoing wire end, making it easier to connect the two branches and advantageous for busbar arrangement and winding processing.

Description

[Technical Field]

[0001] The present application relates to the field of power plants, and in particular to electrical devices, motors and stators thereof. [Background technology]

[0002] With the development of the new energy automobile industry, the development of its drive motors is also tending toward higher voltage, higher speed, integration, platformization, and miniaturization. Among these, miniaturization inevitably requires a significant improvement in the motor's power density.

[0003] Currently, how to reduce the voltage drop inside the motor and decrease the internal energy loss is one of the research goals in this field. Summary of the Invention [Means for solving the problem]

[0004] In view of the above problems, the present application provides an electric device, a motor, and a stator thereof that can reduce the voltage drop of the motor's internal windings and decrease the motor's internal energy loss.

[0005] In a first aspect, the present application provides a stator for a motor, including a stator core and a stator winding installed in the stator core. The inner wall of the stator core is provided with a plurality of winding slots, and the stator winding includes a plurality of conductors inserted into the winding slots. The stator winding includes a first phase winding including a first branch and a second branch. The first branch includes a first incoming wire end, a first outgoing wire end, and a plurality of conductors connected in series between the first incoming wire end and the first outgoing wire end. The second branch includes a second incoming wire end, a second outgoing wire end, and a plurality of conductors connected in series between the second incoming wire end and the second outgoing wire end. The first incoming wire end and the second outgoing wire end are respectively connected to conductors on different layers within the same winding slot. The first outgoing wire end and the second outgoing wire end are respectively connected to conductors on different layers within the same winding slot.

[0006] In the technical solutions of the embodiments of the present application, the first and second lead-in wire ends are respectively connected to conductors on different layers within the same winding groove, and the first and second lead-out wire ends are respectively connected to conductors on different layers within the same winding groove. This reduces the distance between the first and second lead-in wire ends and the distance between the first and second lead-out wire ends, making it easier to connect the two branches and advantageous for busbar arrangement and winding processing.

[0007] In some embodiments, the conductors in each winding groove are arranged in n layers, where n is a positive even number, and the n-layer conductors are arranged in layers L1, ..., L2, ... along the direction from the bottom of the winding groove to the opening of the winding groove. i Layer, ... and L n The first and second lead-in wire ends are designated as L1 layer conductors and L2 layer conductors, where 1≦i≦n. n The first and second lead wire ends are connected to the L1 and L2 layer conductors in the same winding groove, respectively. n are connected to the layer conductors, respectively.

[0008] In the above embodiment, the first lead-in wire end and the first lead-out wire end are both connected to the L1 layer conductor, while the L1 layer conductor is close to the outer end along the radial direction of the stator core, making it easy to weld the first lead-in wire end and the first lead-out wire end to the external busbar. n connected to the layer conductor, while L n The layer conductors are located close to the inner ends along the radial direction of the stator core, and in this way, it is easy to weld the second lead-in wire ends and the second lead-out wire ends to the external busbars.

[0009] In some embodiments, the first branch and the second branch each include a plurality of serially connected plugs, each of which includes at least one conductor. The plugs may have one or more conductors. The conductors are installed in the winding grooves, which is simple in structure, easy to manufacture, and requires little space. This technical solution can improve the power density of the motor.

[0010] In some embodiments, in the first branch, at least two conductors connected to each other are located on the same layer along a direction from the first incoming line end to the first outgoing line end, and the conductors connected on the same layer can balance the slot potentials of the branches and reduce circulation loss between the branches.

[0011] In some embodiments, the first branch includes 2k conductors, and along a direction from the first drop end to the second drop end, the first branch includes 2k conductors, respectively designated A1, A2, ..., A k , …, A 2k-1 and A 2k It is written as A k th conductor and A k+1 The second conductor is L n Layer conductors, from the A1st conductor to the A k The conductor is wound from layer L1 to layer L2 along the first wave winding direction. n The layers are connected in order, and the A k+1 Conductor A to Conductor B 2k The second conductor is wound in the direction of the second wave. n The winding direction of the first wave is opposite to that of the second wave. This arrangement minimizes the voltage drop between the conductors of adjacent winding slots in the same phase winding.

[0012] In some embodiments, in the second branch, at least two conductors connected to each other are located on the same layer along a direction from the second incoming line end to the second outgoing line end, and the conductors connected on the same layer can balance the slot potentials of the branches and reduce circulation loss between the branches.

[0013] In some embodiments, the second branch includes 2k conductors, and along a direction from the second drop end to the second drop end, the second branch includes 2k conductors, respectively designated B1, B2, ..., B k , …, B 2k-1 and B 2k It is written as B k conductor and Bk+1 The conductors are all L1 layer conductors, and the B1 conductor to the B k The second conductor is wound in the direction of the second wave. n Layer B is connected to layer L1 in order. k+1 Conductor B to Conductor B 2k The conductor is wound from layer L1 to layer L2 along the first wave winding direction. n This arrangement makes it possible to minimize the voltage drop between adjacent conductors in the same winding slot.

[0014] In some embodiments, the first phase winding includes 2p polarity phase sets, where p is a positive integer, and the multiple conductors of the first branch are distributed among all polarity phase sets, and the multiple conductors of the second branch are distributed among all polarity phase sets. The above technical solutions can reduce the branch potential imbalance caused by rotor eccentricity and improve the energy conversion efficiency of the motor.

[0015] In some embodiments, in the winding groove in which the first branches and the second branches are distributed, the conductors of the first branches and the conductors of the second branches are alternately arranged along a direction from the bottom of the winding groove toward the opening of the winding groove.

[0016] In some embodiments, two adjacent conductors located in the same winding groove are each x Layer B y Denoted as layers, 1≦x≦y≦k, where |yx|≦k.

[0017] The greater the difference in conductor numbers, the greater the voltage difference between the two conductors. If the difference in numbers between two adjacent conductors in the same winding slot is too large, the voltage stress on the conductors in the winding slot will be too large. Therefore, the above winding method can be made to satisfy |yx|≦k, thereby reducing the voltage stress between the conductors in the winding slot and reducing the voltage drop in the slot.

[0018] In some embodiments, the inner wall of the stator core is provided with 12×N winding slots, where N is a positive integer, the conductors of the first phase winding are distributed among 4×N winding slots, and the stator winding further includes a second phase winding distributed among the 4×N winding slots and a third phase winding distributed among the 4×N winding slots.

[0019] In a second aspect, the present application provides a motor including the stator of the above embodiment.

[0020] In a third aspect, the present application provides an electric device including the motor of the above embodiment.

[0021] The above description is merely a summary of the technical solution of the present application. In order to more clearly understand the technical solution of the present application, which can be implemented according to the content of the specification, and to make the above and other objectives, features and advantages of the present application more apparent, specific embodiments of the present application are listed below.

[0022] In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings used in the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can further derive other drawings based on the drawings without any creative work. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic diagram of a stator of a motor provided in accordance with some embodiments of the present application. FIG. [Figure 2] 1 is a cross-sectional view of a stator provided in accordance with some embodiments of the present application. [Figure 3] 1 is a diagram illustrating a configuration of a stator insert provided in accordance with some embodiments of the present application. [Figure 4] 10A and 10B are diagrams illustrating the configuration of a stator insert provided in accordance with some other embodiments of the present application. [Figure 5] 1. FIG. 4 is another structural view of the stator shown in FIG. [Figure 6]FIG. 2 is a diagram illustrating a first phase winding of a stator winding of a stator provided according to some embodiments of the present application. [Figure 7] FIG. 2 is a schematic diagram of one phase winding of a stator provided in accordance with some embodiments of the present application. [Figure 8] FIG. 3 is an enlarged view of block A of FIG. 2. [Figure 9] FIG. 2 is a schematic diagram of one phase winding of a stator provided in accordance with some other embodiments of the present application. [Figure 10] FIG. 2 is a schematic diagram of three phase windings of a stator provided in accordance with some embodiments of the present application. [Figure 11] FIG. 2 is a connection diagram of phase windings of a stator winding of a stator provided in accordance with some embodiments of the present application. [Figure 12] FIG. 10 is a connection diagram of phase windings of a stator winding of a stator provided in accordance with some other embodiments of the present application. [Figure 13] FIG. 10 is a connection diagram of phase windings of a stator winding of a stator provided in accordance with further some embodiments of the present application. [Figure 14] 1 is a phase winding connection diagram of a stator winding of a stator provided in accordance with still further embodiments of the present application.In the drawings, the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION OF THE INVENTION

[0024] In order to clarify the objectives, technical solutions and advantages of the embodiments of the present application, the technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, but it is obvious that the described embodiments are only some of the embodiments of the present application, and do not represent all of the embodiments of the present application. All other embodiments that can be obtained by those skilled in the art based on the embodiments of the present application without any creative work also fall within the scope of the claims of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art, and the terms used in the specification of the present application are only for describing specific embodiments and are not intended to limit the present application. The terms "comprise" and "have" and any variations thereof in the specification, claims, and drawings of the present application are intended to include a non-exclusive inclusion. Terms such as "first," "second," etc. in the specification, claims, and drawings of the present application are used to distinguish between different objects and are not used to describe a particular order or priority.

[0026] In this application, reference to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase in different places in the specification do not necessarily refer to the same embodiment, nor are they separate or alternative embodiments that conflict with other embodiments.

[0027] In the description of this application, unless otherwise clearly specified or limited, the terms "mounted," "coupled," "connected," and "attached" should be understood in a broad sense to mean, for example, fixedly connected, detachably connected, integrally connected, directly connected, indirectly connected via an intermediate medium, or internal communication between two elements. Those skilled in the art may understand the specific meanings of the above terms in this application depending on the specific circumstances.

[0028] The term "and / or" in this application is merely a relation that describes related objects and indicates that three types of relations can exist. For example, A and / or B can indicate three cases: the presence of only A, the simultaneous presence of A and B, and the presence of only B. In addition, the symbol " / " in this application generally indicates that the related objects before and after it are in an "or" relationship.

[0029] In the embodiments of the present application, the same drawing symbols represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments will be omitted. It should be understood that the dimensions such as thickness, length, and width of various components in the embodiments of the present application shown in the drawings, and the overall dimensions such as thickness, length, and width of the integrated device, are merely exemplary and do not constitute any limitations on the present application.

[0030] As used herein, the term "plurality" means two or more (including two). Currently, in the traction motor of a new energy vehicle, the stator generally comprises a stator core and conductors wound around the stator core. The conductors are wound into the winding slots of the stator core to form an integrated structure, which becomes the stator winding. To improve the slot space factor, multiple layers of conductors can be installed in one winding slot. The stator winding typically includes multiple phase windings, each of which includes multiple branches, and each branch typically needs to be connected by a busbar. The inventors have noticed that in related art, the wiring ends of each branch are relatively far apart, which requires a large space for the busbar connecting the branches, resulting in a large motor size.

[0031] Based on the above reasons, the inventors researched and designed a motor stator in which the first and second lead-in wire ends are connected to conductors on different layers within the same winding groove, respectively, and the first and second lead-out wire ends are connected to conductors on different layers within the same winding groove, respectively. This reduces the distance between the first and second lead-out wire ends and the distance between the first and second lead-out wire ends, making it easier to connect the two branches and advantageous for busbar arrangement and winding processing.

[0032] To facilitate understanding, the terminology used in this application will first be explained below.

[0033] The stator refers to the stationary part of the motor that functions to generate a rotating magnetic field.

[0034] A rotor refers to the rotating member in a motor that functions to effect the conversion between electrical and mechanical energy.

[0035] The span refers to the distance across the surface of the armature between two edges of the same element in the motor winding, and is usually expressed as the number of winding grooves provided in the stator core.

[0036] The number of magnetic pole pairs P is abbreviated as the number of pole pairs. The magnetic poles formed by passing current through the motor windings appear as pairs of N and S poles. The total number of magnetic poles is 2P.

[0037] The pole spacing refers to the distance occupied by each magnetic pole of the motor along the circumferential surface of the air gap. The pole spacing can be expressed as the number of winding slots in the stator core. For example, the pole spacing is Z / 2P, where Z is the total number of winding slots in the stator core.

[0038] A polarity phase set is a set of multiple coils connected in series in an AC motor that belong to the same phase winding at a single pole distance. The current direction and electromagnetic action of each coil in a polarity phase set are all the same, and these multiple coils jointly generate magnetic poles in the phase winding.

[0039] A phase winding is a set of windings in which one or more parallel-connected branches are connected in series or parallel according to a predetermined connection method. The conductors in a phase winding usually span multiple inter-pole distances and are connected to each other and integrated between the coils.

[0040] FIG. 1 is a structural diagram of a stator of a motor provided according to some embodiments of the present application, FIG. 2 is a cross-sectional view of a stator provided according to some embodiments of the present application, FIG. 3 is a structural diagram of a plug member of a stator provided according to some embodiments of the present application, FIG. 4 is a structural diagram of a plug member of a stator provided according to some other embodiments of the present application, FIG. 5 is another structural diagram of the stator shown in FIG. 1, and FIG. 6 is a structural diagram of a first phase winding of a stator winding of a stator provided according to some embodiments of the present application.

[0041] 1 and 2 , some embodiments of the present application provide a stator 10 of a motor including a stator core 101 and a stator winding 102. The stator winding 102 is installed in the stator core 101, and a plurality of winding grooves 1011 are provided on the inner wall of the stator core 101. The stator winding 102 includes a plurality of conductors 1021 inserted in the winding grooves 1011.

[0042] The conductor 1021 is a part of the stator winding 102 that is embedded in the stator core 101 and performs the electromagnetic pole energy conversion function.

[0043] The cross section of the conductor 1021 may be circular, rectangular, or other shapes. Illustratively, the conductor 1021 is a rectangular wire conductor.

[0044] 3, the stator winding 102 includes a plurality of plugs 1022, each of which includes at least one conductor 1021. The portion of the plug 1022 that inserts into the winding groove 1011 can act as the conductor 1021.

[0045] 4 , in some embodiments, each plug member 1022 includes a first plug portion 1026, a second plug portion 1027, and a connecting portion 1028 connecting the first plug portion 1026 and the second plug portion 1027. The portion of the first plug portion 1026 that is inserted into the winding groove 1011 can act as one conductor 1021, and the portion of the second plug portion 1027 that is inserted into the winding groove 1011 can act as one conductor 1021.

[0046] In some embodiments, the plug member 1022 further includes a first extension portion 1029 and a second extension portion 1030, where the first extension portion 1029 extends from an end of the first plug portion 1026 remote from the first connecting portion 1028, and the second extension portion 1030 extends from an end of the second plug portion 1027 remote from the first connecting portion 1028. The first extension portion 1029 and the second extension portion 1030 each extend from the winding groove 1011 to facilitate connection with other plug members.

[0047] 5 , the stator core 101 has a first end 1012 and a second end 1013 along its axial direction, and the winding slot 1011 extends along the first end 1012 to the second end 1013 to penetrate the stator core 101. Along the axial direction of the stator core 101, the stator winding 102 may include an insertion end and a welding end. The insertion end of the stator winding 102 may be located at the first end 1012 of the stator core 101, and the welding end of the stator winding 102 may be located at the second end 1013 of the stator core 101. When winding the insert member 1022, the insert member 1022 may be inserted into the winding slot 1011 via the first end 1012 and extend out of the winding slot 1011 via the second end 1013. The connection portion 1028 can be located at the first end 1012 of the stator core 101 .

[0048] Illustratively, the insert member 1022 is a hairpin coil. Before being inserted into the winding slot 1011, the insert member 1022 may include two straight sides, which are inserted into the winding slot 1011 via the first end 1012, and the portions of the two straight sides housed in the winding slot 1011 form a first insert portion 1026 and a second insert portion 1027, respectively. Continuing to refer to FIG. 4 , the portions of the two straight sides extending out of the winding slot via the second end 1013 form a first extension portion 1029 and a second extension portion 1030, respectively.

[0049] The first extension 1029 and the second extension 1030 are both located at the welding ends of the stator winding 102. After the insert member 1022 is inserted into the stator core 101, the first extension 1029 and the second extension 1030 can be bent to facilitate welding the first extension 1029 and the second extension 1030 to another insert member 1022.

[0050] The winding grooves 1011 are arranged along the circumferential direction of the stator core 101, and two adjacent plug members 1022 may be directly connected or indirectly connected via another conductive structure. Illustratively, a conductive bar may be installed at the second end 1013 of the stator core 101, and both ends of the conductive bar may be welded to the two adjacent plug members 1022, respectively, to connect the two adjacent plug members 1022.

[0051] In some embodiments of the present application, the insert 1022 may be a full-distance coil, the span of which is equal to the inter-pole distance of the stator 10. The full-distance coil typically spans M winding slots 1011, illustratively M=6.

[0052] In some embodiments, the plurality of winding grooves 1011 are uniformly arranged along the circumferential direction of the inner wall of the stator core 101. In other words, the plurality of winding grooves 1011 are arranged at equal distances in the circumferential direction. When designing the insert 1022, the span of the insert 1022 can be determined according to the number of slots, thereby reducing the wire type of the insert 1022 and simplifying the wiring embedding process.

[0053] In some embodiments, the winding grooves 1011 extend along the axial direction of the stator core 101 and penetrate the stator core 101 along the axial direction of the stator core 101. In this embodiment, bending of the insert members 1022 can be reduced during insertion of the insert members 1022 into the winding grooves 1011, thereby making assembly easier.

[0054] In some embodiments, the number of winding slots 1011 is 12×N, where N is a positive integer. Illustratively, the span between the first insert 1026 and the second insert 1027 is six winding slots 1011.

[0055] In some embodiments, the first insert portion 1026 and the second insert portion 1027 are conductors 1021 in the corresponding winding slots 1011. The conductors 1021 in each winding slot 1011 are arranged in multiple layers. The multiple layers of conductors 1021 are distributed in order along the direction from the bottom of the winding slot 1011 to the opening of the winding slot 1011. Optionally, the multiple layers of conductors 1021 are arranged in layers along the radial direction of the stator core 101.

[0056] The first plug portion 1026 and the second plug portion 1027 of the plug member 1022 are two conductors 1021 of the plug member 1022. The conductors 1021 are the effective sides of the plug member 1022, and are the parts that are embedded in the stator core 101 and perform the electromagnetic pole energy conversion function. By installing multiple layers of conductors 1021, it is possible to improve the electromagnetic pole energy conversion efficiency.

[0057] In some embodiments, the two conductors 1021 of the insert member 1022 are embedded in the two winding grooves 1011, respectively. The multiple layers of conductors 1021 in each winding groove 1011 belong to multiple insert members 1022, respectively. The groove openings of the winding grooves 1011 are provided on the inner wall of the stator core 101 facing the rotor. The groove bottom of the winding groove 1011 is the bottom wall of the winding groove 1011 opposite the groove opening.

[0058] In some embodiments, the cross section of the conductor 1021 may be any one or more of a rectangular, elliptical, or racetrack shape, etc. The above structure can improve the slot space factor of the stator core 101.

[0059] In some embodiments, the stator winding 102 includes multiple phase windings, each phase winding including at least one branch, each branch including multiple serially connected inserts 1022. The number of phase windings may be 2, 3, 4, or 5. Of course, the number of phase windings may be greater than 5. The stator 10 in the embodiments of the present application may be applied to motors with different numbers of phases and accommodate different voltage and power ranges.

[0060] In some embodiments, the stator winding 102 may include three phase windings, respectively a first phase winding 1023, a second phase winding, and a third phase winding. Illustratively, the first phase winding 1023 is a U-phase winding, the second phase winding is a V-phase winding, and the third phase winding is a W-phase winding.

[0061] Each phase winding may include only one branch or multiple branches. The branches of a phase winding may also be referred to as parallel-connected branches. To expand the range of use of the winding design and adapt to different voltage and output ranges, the number of branches of a phase winding may be any integer. Illustratively, the phase winding in the present embodiment includes a first branch U1 and a second branch U2.

[0062] In some embodiments, both the first branch U1 and the second branch U2 may include multiple plug members 1022. The multiple plug members 1022 in the first branch U1 are connected in series, and the multiple plug members 1022 in the second branch U2 are connected in series. This embodiment does not limit the number of plug members 1022 in the branches. If necessary, the number of plug members 1022 in the branches can be freely adjusted, thereby expanding the range of use of the winding design and adapting to different voltage and power ranges.

[0063] FIG. 6 is a schematic diagram of one phase winding of a stator provided according to some embodiments of the present application, and FIG. 7 is a schematic diagram of a first phase winding 1023 of a stator 10 provided according to some embodiments of the present application.

[0064] 7 , in some embodiments, the stator winding 102 includes a first phase winding 1023 including a first branch and a second branch. The first branch includes a first incoming wire end, a first outgoing wire end, and a plurality of conductors 1021 connected in series between the first incoming wire end and the first outgoing wire end. The second branch includes a second incoming wire end, a second outgoing wire end, and a plurality of conductors connected in series between the second incoming wire end and the second outgoing wire end. The first incoming wire end and the second outgoing wire end are respectively connected to conductors 1021 on different layers within the same winding slot 1011, and the first outgoing wire end and the second outgoing wire end are respectively connected to conductors 1020 on different layers within the same winding slot 1011.

[0065] 7 shows a U-phase winding as an example. The stator winding of the present invention will be described in detail below using the U-phase winding as an example.

[0066] As shown in FIG. 7, the U-phase winding includes a plurality of branches, two of which are designated as a first branch U1 and a second branch U2.

[0067] For ease of understanding, in FIG. 7, Table 1 shows the first branch U1, Table 2 shows the second branch U2, and Table 3 shows the U-phase winding.

[0068] One of the first lead-in wire end and the first lead-out wire end is a positive wire end, and the other is a negative wire end. The polarity of the second lead-in wire end is the same as that of the first lead-out wire end, and the polarity of the second lead-out wire end is the same as that of the first lead-out wire end.

[0069] For example, in the following description, the first and second lead wire ends are assumed to be positive wiring ends, and the first and second lead wire ends are assumed to be negative wiring ends. Correspondingly, in Figure 7, U1+ represents the first lead wire end of the first branch U1, U1- represents the first lead wire end of the first branch U1, U2+ represents the second lead wire end of the second branch U2, and U2- represents the second lead wire end of the second branch U2.

[0070] 7, N and S respectively represent two magnetic poles of the stator. Illustratively, the stator is provided with eight magnetic poles, i.e., four magnetic pole pairs.

[0071] The stator core is provided with a plurality of winding slots 1011, and the plurality of winding slots 1011 are represented by a line of numbers with N and S poles. For example, in FIG. 7, 48 winding slots 1011 are provided in the stator core 101. In FIG. 7, the 48 winding slots 1011 are respectively represented by a line of numbers with N and S poles, i.e., 1 to 48. Alternatively, each magnetic pole corresponds to six winding slots 1011.

[0072] Multiple layers of conductors 1021 are housed in each winding groove 1011. For example, in Fig. 7, eight conductors 1021 are housed in each winding groove 1011. The eight conductors 1021 are located on layers a, b, c, d, e, f, g, and h, respectively.

[0073] The first branch U1 includes a plurality of series-connected conductors 1021. Illustratively, in Table 1 of FIG. 7, the conductors of the first branch U1 are represented by numbers distributed within the table. For example, the first branch U1 includes 64 conductors, and the 64 conductors are represented by 64 numbers distributed within the table. The 64 conductors of the first branch U1 are connected in order according to the numbers, with the first incoming line end connected to the first conductor and the first outgoing line end connected to the 64th conductor.

[0074] The second branch U2 includes a plurality of conductors connected in series. For example, in Table 2 of FIG. 7, the conductors of the second branch U2 are represented by numbers in the table. For example, the second branch U2 includes 64 conductors, and the 64 conductors are represented by 64 numbers in the table. The 64 conductors of the second branch U2 are connected in order according to the numbers, with the second incoming line end connected to the first conductor and the second outgoing line end connected to the 64th conductor.

[0075] In the embodiment of the present application, the first lead-in wire end and the second lead-out wire end are respectively connected to conductors on different layers within the same winding groove 1011, and the first lead-out wire end and the second lead-out wire end are respectively connected to conductors on different layers within the same winding groove 1011. This reduces the distance between the first lead-in wire end and the second lead-out wire end and the distance between the first lead-out wire end and the second lead-out wire end, making it easier to connect the two branches and advantageous for arranging the busbars and implementing the winding process.

[0076] In some embodiments, as shown in FIG. 8, the conductors in each winding groove 1011 are arranged in n layers, where n is a positive even number. Along the direction from the bottom of the winding groove 1011 to the opening of the winding groove, the n-layer conductors are arranged in layers L1, ..., L i Layer, ... and L n The first and second lead-in wire ends are connected to the L1 layer conductor and the L2 layer conductor in the same winding groove 1011. n The first lead-out end and the second lead-out end are connected to the L1 layer conductor and the L2 layer conductor in the same winding groove 1011, respectively. n are connected to the layer conductors, respectively.

[0077] Illustratively, n may be 2, 4, 6, 8, 16, or 32. Alternatively, as shown in Figure 7, n may be 8, and layers L1 to L8 may be denoted as layers a, b, c, d, e, f, g, and h, respectively.

[0078] In the above embodiment, the first lead-in wire end U1+ and the first lead-out wire end U1- are both connected to the L1 layer conductor, while the L1 layer conductor is close to the outer end along the radial direction of the stator core 101, thus making it easy to connect the first lead-in wire end U1+ and the first lead-out wire end U1- to the external busbar. n connected to the layer conductor, while L n The layer conductors are located close to the inner ends along the radial direction of the stator core, and in this way it is easy to connect the second incoming wire ends and the second outgoing wire ends to the external busbars.

[0079] In some embodiments of the present application, the first branch U1 and the second branch U2 each include a plurality of serially connected plug members 1022, each of which includes at least one conductor. The plug members 1022 may have one conductor or multiple conductors installed in the winding slots 1011. The conductors are installed in the winding slots 1011, which is simple in structure, easy to manufacture, and requires little space. This technical solution can improve the power density of the motor.

[0080] In some embodiments of the present application, in the first branch U1, at least two conductors connected to each other along the direction from the first incoming line end to the first outgoing line end are located on the same layer, which can balance the slot potentials of the branches and reduce the circulation loss between the branches.

[0081] In the present embodiment, still referring to FIG. 7, the first branch includes 2k conductors, and along the direction from the first drop line end to the second drop line end, the first branch includes 2k conductors, respectively designated A1, A2, ..., A k , …, A 2k-1 and A 2k It is written as A k th conductor and A k+1 The second conductor is L n Layer conductors, from the A1st conductor to the A k The conductor is wound from layer L1 to layer L2 along the first wave winding direction. n The layers are connected in order, and the A k+1 Conductor A to Conductor B 2k The second conductor is wound in the direction of the second wave. n Layer L1 is connected to layer L2 in order, and the first wave winding direction is opposite to the second wave winding direction.

[0082] Specifically, the k-layer conductors of the branch are connected in series, and the A1 to A k It is connected to the layer in order, and then A k Layer A 2k The layers are connected in order. For example, the A1 layer is connected to the first drop line end, and the A 2k The layer is connected to the first lead end.

[0083] The first wave winding direction may be a clockwise direction in which the conductor is wound with the conductor crossing between two adjacent layers. For example, the conductor may start from the L1 layer of the J slot, cross G winding slots in the clockwise direction, then be wound into the L2 layer of the J+G slot, then cross G winding slots in the clockwise direction, then be wound into the L1 layer of the J+2G slot, and so on, circulating in this manner back to the J slot, then be wound into the L3 layer of the J slot, then be wound from the L3 layer of the J slot in the clockwise direction, cross G winding slots in the clockwise direction, then be wound into the L4 layer of the J+G slot, then cross G winding slots in the clockwise direction, then be wound into the L3 layer of the J+2G slot, and so on, circulating in this manner until the conductor crosses L of the winding slots. n Roll up the layers.

[0084] The second wave winding direction is opposite to the first wave winding direction, and the conductor may be cross-wound between two adjacent layers along a counterclockwise direction. Illustratively, the conductor may be wound in slot L of slot J. n After crossing G winding slots in the clockwise direction from the layer, the Lth slot of the J+G slot n-1 The winding is then wound in the same layer, and then it crosses G winding slots in the clockwise direction, and then it winds in the Lth slot of the J+2G slot. n It then wraps around the Lth slot in slot J, and cycles in this manner until it returns to slot J. n-2 Then, wind the wire in the clockwise direction to the Lth slot of the Jth slot. n-2 After crossing G winding slots in the clockwise direction from the layer, the Lth slot of the J+G slot n-3 The winding is then wound in the same layer, and then it crosses G winding slots in the clockwise direction, and then it winds in the Lth slot of the J+2G slot. n-2 Wind it in layers, and in this way circulate to wind the L1 layer of the winding groove.

[0085] The inventors have found that the greater the difference in numbers between adjacent conductors in a winding slot, the greater the voltage difference between the two conductors. If the difference in numbers between two adjacent conductors in the same winding slot is too large, the voltage stress between the conductors in the winding slot will be too large, which will affect the reliability of the insulation of the stator winding.

[0086] The above-mentioned installation method can minimize the voltage drop between adjacent conductors in the same winding groove and improve the insulation reliability. In particular, this embodiment is not limited to using the above-mentioned inserts, and other methods of winding the inserts may be used as long as the conductor number difference satisfies the range requirement.

[0087] In some embodiments of the present application, in the second branch U2, at least two conductors 1021 connected to each other are located on the same layer along the direction from the second incoming line end to the second outgoing line end. In the above technical solution, the conductors 1021 connected to the same layer can balance the slot potentials of the branches and reduce the circulation loss between the branches.

[0088] In some embodiments of the present application, the second branch U2 includes 2k conductors, and along a direction from the second drop end to the second drop end, the second branch includes 2k conductors, respectively designated B1, B2, ..., B k , …, B 2k-1 and B 2k It is written as B k th conductor and B k+1 The conductors are all L1 layer conductors, and the B1 conductor to the B k The second conductor is wound in the direction of the second wave. n Layer B is connected to layer L1 in order. k+1 Conductor B to Conductor B 2k The conductor is wound from layer L1 to layer L2 along the first wave winding direction. n This arrangement makes it possible to minimize the voltage drop between adjacent conductors in the same winding slot.

[0089] In some embodiments of the present application, the first phase winding includes 2p polarity phase sets, where p is a positive integer, and the multiple conductors 1021 of the first branch U1 are distributed among all polarity phase sets, and the multiple conductors 1021 of the second branch U2 are distributed among all polarity phase sets. The above technical solutions can reduce the imbalance of branch potentials caused by rotor eccentricity.

[0090] In some embodiments of the present application, in the winding groove in which the first branch U1 and the second branch U2 are distributed, the conductors 1021 of the first branch U1 and the conductors 1021 of the second branch U2 are alternately arranged along the direction from the bottom of the winding groove to the opening of the winding groove.

[0091] In some embodiments of the present application, two adjacent conductors located in the same winding groove are each x Layer B y Denoted as layers, 1≦x≦y≦k, where |yx|≦k.

[0092] The greater the difference in conductor numbers, the greater the voltage difference between the two conductors. If the difference in numbers between two adjacent conductors located in the same winding slot 1011 is too large, the voltage stress on the conductor 1021 in the winding slot 1011 will be too large. Therefore, the above technical solution requires |yx|≦k, which reduces the voltage stress between the conductors in the winding slot 1011 and improves insulation reliability.

[0093] Illustratively, the first incoming line end U1+ is connected to the first conductor of the first branch U1, and the first outgoing line end U1- is connected to the 64th conductor of the first branch U1.

[0094] In some embodiments, the 1st to 32nd conductors of the first branch are connected in series in order. The 1st, 3rd, 5th, and 7th conductors are all a-layer conductors, and the 2nd, 4th, 6th, and 8th conductors are all b-layer conductors. The 9th, 11th, 13th, and 15th conductors are all c-layer conductors. The 10th, 12th, 14th, and 16th conductors are all d-layer conductors. The 17th, 19th, 21st, and 23rd conductors are all e-layer conductors. The 18th, 20th, 22nd, and 24th conductors are all f-layer conductors. The 25th, 27th, 29th, and 31st conductors are all g-layer conductors. The 26th, 28th, 30th, and 32nd conductors are all h-layer conductors.

[0095] In some embodiments, the 33rd to 64th conductors of the first branch are connected in series in order. The 33rd, 35th, 37th, and 39th conductors are all g-layer conductors, and the 34th, 36th, 38th, and 40th conductors are all h-layer conductors. The 41st, 43rd, 45th, and 47th conductors are all f-layer conductors. The 42nd, 44th, 46th, and 48th conductors are all e-layer conductors. The 49th, 51st, 53rd, and 55th conductors are all d-layer conductors. The 50th, 52nd, 54th, and 56th conductors are all c-layer conductors. The 57th, 59th, 61st, and 63rd conductors are all b-layer conductors. The 58th, 60th, 62nd, and 64th conductors are all a-layer conductors.

[0096] In some embodiments of the present application, the 32nd and 33rd conductors of the first branch are both h-layer conductors. Conductors 1021 connected to the same layer can balance the slot potentials of the branches and reduce circulation losses between the branches.

[0097] In some embodiments, the first conductor connected to the first incoming wire end U1+ is located in the 13th winding groove, and the 64th conductor connected to the first outgoing wire end U1- is located in the 20th winding groove.

[0098] In some embodiments, the first conductor connected to the first incoming line end U1+ and the 64th conductor connected to the first outgoing line end U1- are both layer A conductors, which is advantageous for busbar placement and facilitates connection of the first incoming line end U1+ and the first outgoing line end U1- to external circuitry.

[0099] In some embodiments, the stator includes eight magnetic poles, and correspondingly, the phase winding includes eight polarity phase sets. The 16 inserts in branch U1 are distributed among the eight polarity phase sets to reduce the imbalance of branch potentials due to rotor eccentricity.

[0100] In some embodiments, the span between the conductor connected to the first drop end of the first branch U1 and the conductor connected to the second drop end of the second branch U2 is less than or equal to the inter-pole distance. This embodiment can reduce the distance between the drop ends of the two branches, making it easier to connect the drop ends of the two branches and advantageous for busbar arrangement and winding processes.

[0101] The second branch U2 includes 64 conductors, which are represented by 64 numbers distributed in a table in Figure 7. The 64 conductors are connected in order according to the numbers.

[0102] For example, the positive wiring end is the second incoming wiring end, and the negative wiring end is the second outgoing wiring end. In FIG. 7, U2+ represents the second incoming wiring end, and U2- represents the second outgoing wiring end.

[0103] The second incoming line end U2+ is connected to the 1st conductor of the second branch U2, and the second outgoing line end U2- is connected to the 64th conductor of the second branch U2.

[0104] In some embodiments, the first to thirty-second conductors of the second branch are connected in series in order. The first, third, fifth, and seventh conductors are all h-layer conductors, and the second, fourth, sixth, and eighth conductors are all g-layer conductors. The ninth, eleventh, thirteenth, and fifteenth conductors are all f-layer conductors. The tenth, twelfth, fourteenth, and sixteenth conductors are all e-layer conductors. The seventeenth, nineteenth, twenty-first, and twenty-third conductors are all d-layer conductors. The eighteenth, twenty-second, and twenty-fourth conductors are all c-layer conductors. The twenty-fifth, twenty-seventh, twenty-ninth, and thirty-first conductors are all b-layer conductors. The twenty-sixth, twenty-eighth, thirty-third, and thirty-second conductors are all a-layer conductors.

[0105] In some embodiments, the 33rd to 64th conductors of the second branch are connected in series in order. The 33rd, 35th, 37th, and 39th conductors are all a-layer conductors, and the 34th, 36th, 38th, and 40th conductors are all b-layer conductors. The 41st, 43rd, 45th, and 47th conductors are all c-layer conductors. The 42nd, 44th, 46th, and 48th conductors are all d-layer conductors. The 49th, 51st, 53rd, and 55th conductors are all e-layer conductors. The 50th, 52nd, 54th, and 56th conductors are all f-layer conductors. The 57th, 59th, 61st, and 63rd conductors are all g-layer conductors. The 58th, 60th, 62nd, and 64th conductors are all h-layer conductors.

[0106] In some embodiments, the conductor connected to the first drop wire end of the first branch U1 and the conductor 1021 connected to the second drop wire end of the second branch U2 are provided in the same winding groove 1011. In the embodiments of the present application, the drop wire ends of the two branches are pulled out from the same winding groove 1011, which further reduces the distance between the drop wire ends of the two branches, simplifies connection of the drop wire ends of the two branches, and is advantageous for busbar arrangement and winding process implementation.

[0107] In the present embodiment, the 32nd and 33rd conductors of the second branch U2 are both conductors in layer A. Conductors connected to the same layer can balance the slot potentials of the branches and reduce the circulation loss between the branches.

[0108] In some embodiments, the 1st conductor connected to the second incoming line end U2+ is located in the 3rd winding slot of the first, and the 64th conductor connected to the second outgoing line end U2- is located in the 0th winding slot of the second.

[0109] In some embodiments, the first conductor connected to the second incoming line end U2+ and the 64th conductor connected to the second outgoing line end U2- are both layer A conductors, which is advantageous for busbar placement and facilitates connection of the first incoming line end U1+ and the first outgoing line end U1- to external circuitry.

[0110] In some embodiments, the stator 10 includes eight magnetic poles, and correspondingly, the phase winding includes eight polarity phase sets. The 16 inserts of the second branch U2 are distributed among the eight polarity phase sets to reduce the imbalance of the branch potentials due to rotor eccentricity.

[0111] In some embodiments, the span between the conductor connected to the first drop end of the first branch U1 and the conductor connected to the second drop end of the second branch U2 is less than or equal to the inter-pole distance. This embodiment can reduce the distance between the drop ends of the two branches, making it easier to connect the drop ends of the two branches and advantageous for busbar arrangement and winding processes.

[0112] In some embodiments, multiple branches of the phase winding may be connected in series or in parallel. Illustratively, the first branch U1 and the second branch U2 may be connected in series or in parallel.

[0113] 7, the first conductor of the first branch U1 is connected to the first incoming wire end U1+ of the first branch U1, and the first conductor of the second branch U2 is connected to the second outgoing wire end U2+ of the second branch U2. Optionally, the first conductor of the first branch U1 and the first conductor of the second branch U2 are arranged in the same winding groove 1011, i.e., winding groove 13. Pulling out the first incoming wire ends of the two branches from the same winding groove 1011 further reduces the distance between the incoming wire ends of the two branches, facilitating connection of the incoming wire ends of the two branches, and is advantageous for busbar arrangement and winding process implementation.

[0114] In some embodiments, the first conductor of the first branch U1 and the 64th conductor of the first branch U1 are both a-layer conductors, and the first conductor of the second branch U2 and the 64th conductor of the second branch U1 are both h-layer conductors. This embodiment is advantageous for busbar placement and facilitates connection of the incoming line ends (U1+, U2+) and outgoing line ends (U1-, U2-) to an external circuit, respectively.

[0115] The U-phase winding shown in Figure 7 can balance the potential of each branch slot, reducing circulation loss between branches, reducing unbalance of branch potential due to rotor eccentricity, and reducing voltage stress on the conductors in the slots, while at the same time providing advantages in busbar placement and winding process implementation. The embodiment of this application reduces the maximum voltage drop between adjacent conductors in the same winding slot to 0.47U. ph (U ph is the phase voltage). Compared to a conventional stator winding, the embodiment of the present application can reduce the voltage drop in the winding slot by 51.5%.

[0116] 9 is a schematic diagram of one phase winding of a stator provided according to some embodiments of the present application. Illustratively, FIG. 9 shows a U-phase winding.

[0117] In some embodiments, six conductors are housed in each winding slot, as shown in Figure 9. Eight conductors are located on layers a, b, c, d, e, and f, respectively.

[0118] In FIG. 9, U1+ represents the first incoming line end of the first branch U1, U1- represents the first outgoing line end of the first branch U1, U2+ represents the second incoming line end of the second branch U2, and U2- represents the second outgoing line end of the second branch U2.

[0119] N and S respectively represent two magnetic poles of the stator. For example, the stator has eight magnetic poles, i.e., four magnetic pole pairs. The stator core has 48 winding slots. In FIG. 9, the 48 winding slots are represented by a row of numbers, i.e., 1 to 48, for the N and S poles. Each magnetic pole corresponds to six winding slots.

[0120] For example, the positive wiring end is the first incoming wiring end, and the negative wiring end is the first outgoing wiring end. In FIG. 8, U1+ represents the first incoming wiring end, and U1- represents the first outgoing wiring end.

[0121] The first incoming line end U1+ is connected to the first conductor, and the first outgoing line end U1- is connected to the 48th conductor.

[0122] In some embodiments, the first to twenty-fourth conductors of the first branch are connected in series in order. The first, third, fifth, and seventh conductors are all a-layer conductors, and the second, fourth, sixth, and eighth conductors are all b-layer conductors. The ninth, eleventh, thirteenth, and fifteenth conductors are all c-layer conductors. The tenth, twelfth, fourteenth, and sixteenth conductors are all d-layer conductors. The seventeenth, nineteenth, twenty-first, and twenty-third conductors are all e-layer conductors. The eighteenth, 20th, 22nd, and 24th conductors are all f-layer conductors.

[0123] In some embodiments, the 25th to 48th conductors of the first branch U1 are connected in series in order. The 25th, 27th, 29th, and 31st conductors are all f-layer conductors. The 26th, 28th, 30th, and 32nd conductors are all e-layer conductors. The 33rd, 35th, 37th, and 39th conductors are all d-layer conductors. The 34th, 36th, 38th, and 40th conductors are all c-layer conductors. The 41st, 43rd, 45th, and 47th conductors are all b-layer conductors. The 42nd, 44th, 46th, and 48th conductors are all a-layer conductors.

[0124] In this embodiment, the 24th and 25th conductors of the first branch U1 are both layer f conductors. These two inserts 1022 can be welded across the entire length without the need for interlayer welding, thereby simplifying the welding process. Conductors connected to the same layer can also balance the slot potentials of the branches and reduce circulation losses between the branches.

[0125] In some embodiments, the first conductor connected to the first inlet end U1+ is located in the 13th winding groove, and the 48th conductor connected to the first outlet end U1- is located in the 20th winding groove.

[0126] In some embodiments, the first conductor connected to the first incoming line end U1+ and the 48th conductor connected to the first outgoing line end U1- are both layer A conductors, which is advantageous for busbar placement and facilitates connection of the first incoming line end U1+ and the first outgoing line end U1- to external circuitry.

[0127] In some embodiments, the stator includes eight magnetic poles, and correspondingly, the phase winding includes eight polarity phase sets. The multiple inserts 1022 of branch U1 are distributed among the eight polarity phase sets to reduce imbalance of branch potentials due to rotor eccentricity.

[0128] In some embodiments, the span between the conductor connected to the first drop end of the first branch U1 and the conductor connected to the second drop end of the second branch U2 is less than or equal to the inter-pole distance. This embodiment can reduce the distance between the drop ends of the two branches, making it easier to connect the drop ends of the two branches and advantageous for busbar arrangement and winding processes.

[0129] For example, the positive wiring end in the second branch U2 is the second incoming line end, and the negative wiring end is the second outgoing line end, as shown in Figure 9. In Figure 9, U2+ represents the second incoming line end, and U2- represents the second outgoing line end.

[0130] The second incoming line end U2+ is connected to the 1st conductor, and the second outgoing line end U2- is connected to the 48th conductor.

[0131] In some embodiments, as shown in FIG. 9 , the first to twenty-fourth conductors of the second branch U2 are connected in series in order. The first, third, fifth, and seventh conductors are all f-layer conductors, and the second, fourth, sixth, and eighth conductors are all e-layer conductors. The ninth, eleventh, thirteenth, and fifteenth conductors are all d-layer conductors. The tenth, twelfth, fourteenth, and sixteenth conductors are all c-layer conductors. The seventeenth, nineteenth, twenty-first, and twenty-third conductors are all b-layer conductors. The eighteenth, 20th, 22nd, and 24th conductors are all a-layer conductors.

[0132] In some embodiments, the 25th to 48th conductors of the second branch are connected in series in order. The 25th, 27th, 29th, and 31st conductors are all h-layer conductors. The 26th, 28th, 30th, and 32nd conductors are all e-layer conductors. The 33rd, 35th, 37th, and 39th conductors are all d-layer conductors. The 34th, 36th, 38th, and 40th conductors are all c-layer conductors. The 41st, 43rd, 45th, and 47th conductors are all b-layer conductors. The 42nd, 44th, 46th, and 48th conductors are all a-layer conductors.

[0133] In some embodiments, the conductor connected to the first drop wire end of the first branch U1 and the conductor connected to the second drop wire end of the second branch U2 are provided in the same winding groove 1011. In the embodiments of the present application, the drop wire ends of the two branches are pulled out from the same winding groove 1011, which further reduces the distance between the drop wire ends of the two branches, facilitating connection of the drop wire ends of the two branches, and is advantageous for busbar arrangement and winding process implementation.

[0134] In the present embodiment, the 24th and 25th conductors of the second branch are both conductors in layer A. Conductors connected to the same layer can balance the slot potentials of the branches and reduce the circulation loss between the branches.

[0135] In some embodiments, the first conductor connected to the second incoming wire end U2+ is located in the 13th winding groove, and the 48th conductor connected to the second outgoing wire end U2- is located in the 20th winding groove.

[0136] In some embodiments, the first conductor connected to the second incoming line end U2+ and the 48th conductor connected to the second outgoing line end U2- are both layer A conductors, which is advantageous for busbar placement and facilitates connection of the first incoming line end U1+ and the first outgoing line end U1- to external circuitry.

[0137] In some embodiments, the stator 10 includes eight magnetic poles, and the phase winding includes eight polarity phase sets. The multiple inserts 1022 of the second branch U2 are distributed among the eight polarity phase sets to reduce the imbalance of the branch potentials due to rotor eccentricity.

[0138] In some embodiments, the span between the conductor connected to the first drop end of the first branch U1 and the conductor connected to the second drop end of the second branch U2 is less than or equal to the inter-pole distance. This embodiment reduces the distance between the drop ends of the two branches, facilitating connection of the drop ends of the two branches and favoring busbar placement and winding processes. The 24 plugs 1022 of the second branch U2 are also distributed into eight polarity phase sets. This embodiment can reduce branch potential imbalances caused by rotor eccentricity.

[0139] In some embodiments, multiple branches of the phase winding may be connected in series or in parallel. Illustratively, the first branch U1 and the second branch U2 may be connected in series or in parallel.

[0140] 9, the first conductor of the first branch U1 is connected to the first incoming wire end U1+ of the first branch U1, and the first conductor of the second branch U2 is connected to the second outgoing wire end U2+ of the second branch U2. Optionally, the first conductor of the first branch U1 and the first conductor of the second branch U2 are disposed in the same winding groove 1011, i.e., winding groove 13. Pulling out the incoming wire ends of the two branches from the same winding groove 1011 further reduces the distance between the incoming wire ends of the two branches, facilitating connection of the incoming wire ends of the two branches, and is advantageous for busbar arrangement and winding process implementation.

[0141] In some embodiments, the first conductor of the first branch U1 and the 64th conductor of the first branch U1 are both a-layer conductors, and the first conductor of the second branch U2 and the 48th conductor of the second branch U1 are both f-layer conductors. This embodiment is advantageous for busbar placement and facilitates connection of the two incoming line ends (U1+, U2+) and the two outgoing line ends (U1-, U2-) to an external circuit.

[0142] The U-phase winding shown in Figure 98 can balance the potential of each branch slot, reducing circulation loss between branches, reducing unbalance of branch potential due to rotor eccentricity, and reducing voltage stress on the conductors in the slots, while at the same time being advantageous for busbar placement and winding process implementation. The embodiment of the present application reduces the maximum voltage drop between adjacent conductors in the same winding slot to 0.46U. ph (U ph is the phase voltage).

[0143] The present embodiments are applicable to windings with different numbers of layers, advantageously widening the voltage and power ranges for winding use.

[0144] 10 is a schematic diagram of three phase windings of a stator provided in some embodiments of the present application. FIG. 10 shows a U-phase winding, a V-phase winding, and a W-phase winding of the stator winding. For ease of understanding, FIG. 10 divides the three phase windings of the stator winding into three tables.

[0145] In some embodiments, all of the lead-in wire ends in multiple phase windings are connected to conductors in different winding slots, which increases the distance between each lead-in wire end and can reduce voltage stress between phases.

[0146] In some embodiments, all of the wire leads in multiple phase windings are connected to conductors in different winding slots, which increases the distance between the wire leads and reduces voltage stress between the phases.

[0147] In some embodiments, all of the incoming and outgoing wire ends are connected to conductors in different winding slots, which can increase the distance between the incoming and outgoing wire ends and reduce voltage stress between the phases.

[0148] 10, the U-phase winding includes a first branch U1 and a second branch U2, where U1+ represents the first incoming end of the first branch U1, U1- represents the first outgoing end of the first branch U1, U2+ represents the second incoming end of the second branch U2, and U2- represents the second outgoing end of the second branch U2. Alternatively, the U-phase winding of FIG. 10 may be formed by merging the first branch U1 and the second branch U2 as shown in FIG. 11.

[0149] The V-phase winding includes a first branch V1 and a second branch V2, where V1+ represents the first incoming end of the first branch V1, V1- represents the first outgoing end of the first branch V1, V2+ represents the second incoming end of the second branch V2, and V2- represents the second outgoing end of the second branch V2.

[0150] The W-phase winding includes a first branch W1 and a second branch W2, where W1+ represents the first incoming end of the first branch W1, W1- represents the first outgoing end of the first branch W1, W2+ represents the second incoming end of the second branch W2, and W2- represents the second outgoing end of the second branch W2.

[0151] In some embodiments, twelve conductors connected to wiring ends U1+, U1-, U2+, U2-, V1+, V1-, V2+, V2-, W1+, W1-, W2+, W2- are respectively placed in twelve winding grooves.

[0152] In some embodiments, the six conductors connected to the wiring ends U1+, U1-, U2+, U2-, V1+, and V1- are all layer A conductors, and the wiring ends are all close to the radially outer ends of the stator core, making welding easier.

[0153] In some embodiments, the twelve conductors connected to the wiring ends U1+, U1-, U2+, U2-, V1+, V1-, V2+, V2-, W1+, W1-, W2+, W2- are distributed within three adjacent magnetic poles, which is advantageous for busbar placement.

[0154] 11, in some embodiments, the stator windings include three phase windings: a U-phase winding, a V-phase winding, and a W-phase winding. Illustratively, the three phase windings are connected in a triangle.

[0155] The U-phase winding includes a first branch U1 and a second branch U2 connected in series, the V-phase winding includes a first branch V1 and a second branch V2 connected in series, and the W-phase winding includes a first branch W1 and a second branch W2 connected in series.

[0156] In the present embodiment, the inner wall of the stator core 101 is provided with 12×N winding slots 1011, where N is a positive integer. The conductors of the first phase winding are distributed among 4×N winding slots. The conductors of the second phase winding are distributed among 4×N winding slots, and the conductors of the third phase winding are distributed among 4×N winding slots.

[0157] 12, in some embodiments, the stator winding includes three phase windings, namely, a U-phase winding, a V-phase winding, and a W-phase winding, where N=4, and the U-phase winding, the V-phase winding, and the W-phase winding are distributed in 16 winding slots 1011, respectively.

[0158] Specifically, the U-phase windings are distributed in slots 1-2, 7-8, 13-14, 19-20, 25-26, 31-32, 37-38, and 43-44. The V-phase windings are distributed in slots 5-6, 11-12, 17-18, 23-24, 29-30, 35-36, 41-42, and 47-48. The W-phase windings are distributed in slots 3-4, 9-10, 15-16, 21-22, 27-28, 33-34, 39-40, and 45-46.

[0159] The above installation method can reduce the circulation loss between the three phase windings and improve the conversion efficiency of the motor.

[0160] The U-phase winding includes a first branch U1 and a second branch U2 connected in series, the V-phase winding includes a first branch V1 and a second branch V2 connected in series, and the W-phase winding includes a first branch W1 and a second branch W2 connected in series.

[0161] FIG. 13 is a connection diagram of the phase windings of the stator winding of the stator provided according to some other embodiments of the present application.

[0162] 13, in some embodiments, the stator windings include three phase windings: a U-phase winding, a V-phase winding, and a W-phase winding. Illustratively, the three phase windings are connected in a triangle.

[0163] The U-phase winding includes a first branch U1 and a second branch U2 connected in parallel, the V-phase winding includes a first branch V1 and a second branch V2 connected in parallel, and the W-phase winding includes a first branch W1 and a second branch W2 connected in parallel.

[0164] FIG. 14 is a connection diagram of phase windings of a stator winding of a stator provided according to still further embodiments of the present application.

[0165] As shown in FIG. 14 , in some embodiments, the stator winding includes three phase windings: a U-phase winding, a V-phase winding, and a W-phase winding. Illustratively, the three phase windings are connected in a star configuration. The U-phase winding includes a first branch U1 and a second branch U2 connected in parallel. The V-phase winding includes a first branch V1 and a second branch V2 connected in parallel. The W-phase winding includes a first branch W1 and a second branch W2 connected in parallel.

[0166] Referring to the different stator windings shown in Figures 11 to 14, by changing the connection method of the phase windings and the connection method of the phase winding branches, the number of turns of the series connection of the stator windings can be adjusted, thereby adapting to applications with different voltages and power levels.

[0167] An embodiment of the present application further provides a motor including the stator provided by any one of the above embodiments. Illustratively, the motor further includes a rotor disposed in a space defined by an inner wall of the stator core.

[0168] The motor in the embodiment of the present application may be a generator or an electric motor.

[0169] An embodiment of the present application further provides an electric device including the motor provided by any one of the above embodiments.

[0170] In some embodiments, the electric device includes a power assembly including a motor and a reducer, and the motor and the reducer are transmission-connected. Specifically, the drive shaft of the motor and the input shaft of the reducer are transmission-connected via a transmission member such as a coupling, so that driving force can be output from the motor to the reducer.

[0171] The present embodiment further provides a vehicle including the above-mentioned power assembly installed in the vehicle and providing the vehicle with operating power. Specifically, in this embodiment, the vehicle may be a new energy vehicle powered by electric energy, for example. Here, the new energy vehicle may be a hybrid electric vehicle, a pure electric vehicle, a fuel cell electric vehicle, etc., and may be a vehicle that uses a high-efficiency energy storage device such as a supercapacitor, a flywheel battery, or a flywheel energy storage device as an electric energy source.

[0172] Finally, it should be noted that the above embodiments are only used to explain the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still amend the technical solutions described in the above embodiments or equivalently replace some of the technical features thereof, but it should be understood that such amendments or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0173] It should be noted that, unless there is a contradiction, the embodiments and features of the embodiments of the present application can be combined with each other.

[0174] Finally, it should be noted that the above embodiments are only used to explain the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still amend the technical solutions described in the above embodiments or equivalently replace some of the technical features thereof, but it should be understood that such amendments or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application. [Explanation of symbols]

[0175] 10 Stator 13 Winding groove 101 stator core 102 Stator winding 1011 Winding groove 1012 First Edge 1013 Second Edge 1020 Conductor 1021 Conductor 1022 Insertion member 1023 1st phase winding 1026 First Insert 1027 Second Insert 1028 First Connection 1029 First extension 1030 Second extension

Claims

1. A stator of a motor, a stator core and a stator winding disposed on the stator core, the stator core having an inner wall provided with a plurality of winding grooves, the stator winding including a plurality of conductors inserted into the winding grooves; the stator winding includes a first phase winding including a first branch and a second branch, the first branch including a first incoming line end, a first outgoing line end, and a plurality of the conductors connected in series between the first incoming line end and the first outgoing line end, and the second branch including a second incoming line end, a second outgoing line end, and a plurality of the conductors connected in series between the second incoming line end and the second outgoing line end; the first lead-in end and the second lead-in end are respectively connected to the conductors in different layers within the same winding groove, and the first lead-out end and the second lead-out end are respectively connected to the conductors in different layers within the same winding groove. Stator.

2. The conductors in each of the winding grooves are arranged in n layers, where n is a positive even number, and the n-layer conductors are arranged in a direction from the bottom of the winding groove to the opening of the winding groove, such that L １ Layer,...,L ｉ layer, ... and L ｎ layers, where 1≦i≦n, The first lead-in wire end and the second lead-in wire end are arranged in the same winding groove. １ Layer conductor and L ｎ The first lead wire end and the second lead wire end are connected to the L layer conductors in the same winding groove. １ Layer conductor and L ｎ each connected to a layer conductor; The stator according to claim 1 .

3. the first branch and the second branch each include a plurality of serially connected plug members, each of the plug members including at least one of the conductors; The stator according to claim 2 .

4. In the first branch, at least two of the conductors connected to each other are located in the same layer along a direction from the first lead-in end to the first lead-out end. The stator according to any one of claims 1 to 3.

5. The first branch includes 2k conductors, and along a direction from the first drop line end to the second drop line end, the first branch includes 2k conductors, each of which is A １ , A ２ , ..., A ｋ , ..., A ２ｋ－１ and A ２ｋ It is written, Part A ｋ conductor and A ｋ＋１ The conductors are all L ｎ a layer conductor, The above A １ conductor to the A ｋ The conductor is wound in the first wave direction along the L １ Layer to L ｎ The A ｋ＋１ conductor to the A ２ｋ The second conductor is wound in the L direction along the second wave winding direction. ｎ Layer to L １ the first wave winding direction is opposite to the second wave winding direction.

5. The stator according to claim 4.

6. In the second branch, at least two of the conductors connected to each other are located in the same layer along a direction from the second lead-in end to the second lead-out end.

6. The stator according to claim 5.

7. The second branch includes 2k conductors, and along a direction from the second drop line end to the second drop line end, the second branch includes 2k conductors, each B １ , B ２ , ..., B ｋ , ..., B ２ｋ－１ and B ２ｋ It is written, Part B ｋ conductor and B ｋ＋１ The conductors are all L １ a layer conductor, The above B １ conductor to the B ｋ The second conductor is wound in the second wave direction. ｎ Layer to L １ The B ｋ＋１ conductor to the B ２ｋ The conductor is wound in the first wave direction. １ Layer to L ｎ connected to the layers in order, 7. The stator according to claim 6.

8. the first phase winding includes 2p polarity phase pairs, where p is a positive integer; the plurality of conductors in the first branch are distributed among all of the polarity phase sets, and the plurality of conductors in the second branch are distributed among all of the polarity phase sets; 8. The stator according to claim 7.

9. In the winding groove in which the first branch and the second branch are distributed, the conductors of the first branch and the conductors of the second branch are alternately arranged along a direction from a groove bottom to a groove opening of the winding groove.

9. A stator according to claim 7 or 8.

10. Two adjacent conductors located in the same winding groove are each ｘ Layer B ｙ layer, where 1≦x≦y≦k, where |y−x|≦k.

9. A stator according to claim 7 or 8.

11. the stator core has an inner wall provided with 12×N winding grooves, where N is a positive integer, and the conductors of the first phase winding are distributed among 4×N winding grooves; the stator winding further includes a second phase winding distributed among 4×N of the winding slots and a third phase winding distributed among 4×N of the winding slots; A stator according to any one of claims 1 to 10.

12. A stator comprising the stator according to any one of claims 1 to 11. Motor.

13. 13. A motor comprising: Electrical equipment.

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