Electrical devices, 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 devices, and in particular to electrical devices, motors and stators thereof. [Background Art]

[0002] With the development of the new energy vehicle industry, the driving motors thereof tend to develop in the direction of high voltage, high speed, integration, platformization and miniaturization. Among these, miniaturization inevitably requires a significant increase in the output density of the motor.

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

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

[0005] In a first aspect, the present application provides a stator for a motor including a stator core and a stator winding disposed on the stator core. A plurality of winding slots are provided on an inner wall of the stator core, 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 inlet end, a first outlet end, and a plurality of conductors connected in series between the first inlet end and the first outlet end. The second branch includes a second inlet end, a second outlet end, and a plurality of conductors connected in series between the second inlet end and the second outlet end. The first inlet end and the second inlet end are respectively connected to conductors of different layers within the same winding slot. The first outlet end and the second outlet end are respectively connected to conductors of different layers within the same winding slot.

[0006] In the technical solution of the embodiment of the present application, by connecting the first and second service drop ends to conductors of different layers within the same winding groove, respectively, and by connecting the first and second lead ends to conductors of different layers within the same winding groove, respectively, the distance between the first and second service drop ends and the distance between the first and second lead ends can be reduced, making it easier to connect the two branches and providing advantages in busbar arrangement and winding process implementation.

[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 the direction from the bottom of the winding groove toward the opening of the winding groove as L1 layer, ..., L i Layers, ... and L n Denoted as a layer, 1 ≤ i ≤ n, and the first and second service ends are L1 layer conductors and L in the same winding groove. n Each is connected to a layer conductor, and the first and second lead wire ends are connected to the L1 layer conductor and L in the same winding groove. n Each layer conductor is connected to a separate conductor.

[0008] In the above embodiment, both the first siding end and the first lead end are 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, thus facilitating welding of the first siding end and the first lead end to the external busbar. Both the second siding end and the second lead end are L n L is connected to a layered conductor. n The layered conductors are positioned close to the inner ends along the radial direction of the stator core, thus facilitating the welding of the second lead-in and second lead-out ends to the external busbars.

[0009] In some embodiments, the first branch and the second branch each include a plurality of series-connected insert members, each insert member including at least one conductor. The insert members may be fitted with one or more conductors. The conductors are fitted within the winding groove, the structure is simple, easy to manufacture, and occupies little space, and the above-mentioned technology can improve the power density of the motor.

[0010] In some embodiments, in the first branch, along the direction from the first incoming line end to the first outgoing line end, the at least two mutually connected conductors are located in the same layer. Conductors connected in the same layer can balance the slot potential of the branch and reduce circulating loss between branches.

[0011] In some embodiments, the first branch comprises 2k conductors, and along the direction from the first incoming line end to the second incoming line end, the first branch comprises 2k conductors, which are respectively A₁, A₂, ..., A k , ..., A 2k-1 and A 2k , which are denoted as, the A k -th conductor and the A k+1 -th conductor are both L n layer conductors, from the A₁-th conductor to the A k -th conductor are sequentially connected from the L₁ layer to the L n layer along the first wave winding direction, from the A k+1 -th conductor to the A 2k -th conductor are sequentially connected from the L n layer to the L₁ layer along the second wave winding direction, and the first wave winding direction is opposite to the second wave winding direction. The above arrangement can reduce the voltage drop between conductors of adjacent winding slots in the same phase winding as much as possible.

[0012] In some embodiments, in the second branch, along the direction from the second incoming line end to the second outgoing line end, the at least two mutually connected conductors are located in the same layer. Conductors connected in the same layer can balance the slot potential of the branch and reduce circulating loss between branches.

[0013] In some embodiments, the second branch comprises 2k conductors, and along the direction from the second incoming line end to the second incoming line end, the second branch comprises 2k conductors, which are respectively B₁, B₂, ..., B k , ..., B 2k-1 and B 2k , which are denoted as, the B k -th conductor and the Bk+1 The second conductor is an L1 layer conductor, and from the first conductor to the B1 conductor k The second conductor is L along the second wave winding direction. n The layers are connected sequentially from the L1 layer, and the B k+1 From the second conductor to the B 2k The second conductor is L1 layer along the first winding direction. n The layers are connected sequentially. This installation method minimizes voltage drop between adjacent conductors within the same winding groove.

[0014] In some embodiments, the first phase winding contains 2p polar phase pairs, where p is a positive integer, and multiple conductors of the first branch are distributed within all polar phase pairs, and multiple conductors of the second branch are distributed within all polar phase pairs. According to the above technical proposal, it is possible to reduce branch potential imbalance due to rotor eccentricity and improve the energy conversion efficiency of the motor.

[0015] In some embodiments, in a winding groove where 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 the direction from the bottom of the winding groove toward the opening of the winding groove.

[0016] In some embodiments, two adjacent conductors located within the same winding groove are each A x Layer and B y This is denoted as a layer, where 1 ≤ x ≤ y ≤ k, and where |yx| ≤ k.

[0017] The larger the difference in conductor numbers, the larger the voltage difference between the two conductors. If the difference in numbers between two adjacent conductors located in the same winding groove is too large, the voltage stress on the conductors in the winding groove becomes too high. Therefore, the above winding method can be made to |yx|≦k. This reduces the voltage stress between conductors in the winding groove and reduces the voltage drop in the slot.

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

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

[0020] In a third embodiment, the present application provides an electrical device including the motor in the above embodiment.

[0021] The above description is merely an outline of the proposed technology. In order to better understand the technical means of this application, and to make the above and other objectives, features, and advantages of this application clearer and easier to understand, specific embodiments of this application are listed below.

[0022] To further clarify the technical concept in the embodiments of the present application, the drawings used in the embodiments of the present application are briefly introduced below. Clearly, the drawings in the following description represent only a few embodiments of the present application, and those skilled in the art can obtain further drawings based on these drawings without any creative work. [Brief explanation of the drawing]

[0023] [Figure 1] This is a diagram showing the configuration of a motor stator provided by some embodiments of the present application. [Figure 2] This is a cross-sectional view of a stator provided by some embodiments of the present application. [Figure 3] This is a diagram showing the configuration of the stator insertion member provided by some embodiments of the present application. [Figure 4] This is a diagram showing the configuration of the stator insertion member provided in some other embodiments of the present application. [Figure 5] This is another configuration diagram of the stator shown in Figure 1. [Figure 6]This is a diagram showing the configuration of the first phase winding of the stator winding of a stator provided by some embodiments of the present application. [Figure 7] This is a schematic diagram of one phase winding of a stator provided by some embodiments of the present application. [Figure 8] This is an enlarged view of Figure 2 in Block A. [Figure 9] This is a schematic diagram of one phase winding of a stator provided in some other embodiments of the present application. [Figure 10] This is a schematic diagram of the three phase windings of a stator provided by some embodiments of the present invention. [Figure 11] This is a diagram showing the phase winding connections of the stator windings of a stator provided by some embodiments of the present application. [Figure 12] This is a diagram showing the phase winding connections of the stator windings of a stator provided in some other embodiments of the present application. [Figure 13] This is a diagram showing the phase winding connections of the stator windings of a stator provided in some further embodiments of the present application. [Figure 14] This is a diagram showing the phase winding connections of the stator windings of a stator provided in some further embodiments of the present application. In the drawings, the drawings are not necessarily drawn to actual scale. [Modes for carrying out the invention]

[0024] To further clarify the purpose, technical proposal and advantages of the embodiments of this application, the technical proposal of the embodiments of this application will be clearly described below with reference to the drawings of the embodiments of this application. However, it should be clear that the embodiments described are only a selection of embodiments of this application, not all of them. All other embodiments that a person skilled in the art could obtain without creative work based on the embodiments of this application all fall within the scope of the claims of this application.

[0025] Unless otherwise defined, all technical and scientific terms used in this Application have the same meaning as those generally understood by those skilled in the art, and the terms used in the Specification of this Application are for illustrative purposes only and are not intended to limit this Application. The terms “includes” and “have,” and any variations thereof, in the description of the Specification, Claims and the Drawings above, are intended to include non-exclusive inclusion. A brief explanation The terms "first," "second," etc., used in this context are used to distinguish between different subjects and are not used to describe a specific order or priority.

[0026] Where the “Examples” are used in this Application, it means that certain features, structures, or characteristics described in conjunction with the Examples may be included in at least one Example of this Application. The occurrence of the phrase at each location in the Specification does not necessarily refer to the same Example, nor does it mean that each is an independent or alternative Example that contradicts the other Examples.

[0027] In this description, unless otherwise specified or limited, the terms “attachment,” “connection,” “linking,” and “attaching” should be understood broadly to mean, for example, that a connection may be fixed, detachably connected, integrally connected, directly connected, indirectly connected via an intermediate medium, or internal communication between two elements. A person skilled in the art may understand the specific meaning of these terms in this application depending on the specific circumstances.

[0028] In this application, the term "and / or" merely describes a related relationship that explains the related objects, indicating that three types of relationships are possible. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. In addition, the symbol " / " in this application generally indicates that the preceding and following related objects are in an "or" relationship.

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

[0030] In this application, "multiple" means two or more (including two). Currently, in the drive motors of new energy vehicles, the stator generally consists of a stator core and conductors wound around the stator core. The conductors are wound within the winding grooves of the stator core and form an integrated structure, which constitutes the stator winding. To improve the slot space factor, multiple layers of conductors can be installed within a single winding groove. The stator winding typically includes multiple phase windings, each phase winding includes multiple branches, each branch usually needs to be connected by busbars. The inventors have noticed that in related technologies, the distance between the wiring ends of each branch is relatively large, resulting in a large space occupied by the busbars connecting the branches and thus an increase in the size of the motor.

[0031] Based on the above reasons, the inventors studied and designed a motor stator in which the distance between the first and second siding ends and the distance between the first and second leading ends can be reduced by connecting the first and second siding ends and the distance between the first and second leading ends by connecting the first and second siding ends and the conductors in different layers within the same winding groove, thereby facilitating the connection of the two branches and providing advantages in busbar arrangement and winding process implementation.

[0032] To facilitate understanding, the technical terms that appear in this application are explained below.

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

[0034] A rotor refers to a rotating component in a motor that functions to convert electrical energy into mechanical energy.

[0035] Span refers to the distance between two sides of the same element in a motor winding that cross the surface of the armature, and is usually expressed by 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. When current is passed through the motor windings, the magnetic poles appear in pairs of north and south poles. The total number of magnetic poles is 2P.

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

[0038] A polarity-phase set in an AC motor refers to a group of multiple coils belonging to the same phase winding connected in series at a single inter-pole distance; it is also called a coil set. The current direction and electromagnetic action of each coil within a polarity-phase set are all the same, and these multiple coils commonly generate the magnetic poles within that phase winding.

[0039] A phase winding refers to a set of windings in which one or more parallel-connected branches are connected in series or parallel according to a predetermined connection method. Conductors within a phase winding typically span multiple inter-pole distances, and the coils are connected to each other and integrated.

[0040] Figure 1 is a configuration diagram of the stator of a motor provided in some embodiments of the present application; Figure 2 is a cross-sectional view of the stator provided in some embodiments of the present application; Figure 3 is a configuration diagram of the insert member of the stator provided in some embodiments of the present application; Figure 4 is a configuration diagram of the insert member of the stator provided in some other embodiments of the present application; Figure 5 is another configuration diagram of the stator shown in Figure 1; and Figure 6 is a configuration diagram of the first phase winding of the stator winding of the stator provided in some embodiments of the present application.

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

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

[0043] The cross-section of the conductor 1021 may be circular, rectangular, or of other shape. For example, the conductor 1021 is a rectangular wire conductor.

[0044] In some embodiments, as shown in Figure 3, the stator winding 102 includes a plurality of insert members 1022, each insert member 1022 including at least one conductor 1021. The portion of the insert member 1022 inserted into the winding groove 1011 can act as a conductor 1021.

[0045] In some embodiments, referring to Figure 4, each insert member 1022 includes a first insert portion 1026, a second insert portion 1027, and a connecting portion 1028 connecting the first insert portion 1026 and the second insert portion 1027. The portion of the first insert portion 1026 inserted into the winding groove 1011 can act as one conductor 1021, and the portion of the second insert portion 1027 inserted into the winding groove 1011 can act as one conductor 1021.

[0046] In some embodiments, the insert member 1022 further includes a first extension 1029 and a second extension 1030, the first extension 1029 extending from one end of a first insert portion 1026 away from a first connection portion 1028, and the second extension 1030 extending from one end of a second insert portion 1027 away from the first connection portion 1028. The first extension 1029 and the second extension 1030 extend from the winding groove 1011, respectively, to facilitate connection with other insert members.

[0047] In some embodiments, as shown in Figure 5, the stator core 101 has a first end 1012 and a second end 1013 along its axial direction, and the winding groove 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 weld end. The insertion end of the stator winding 102 may be located at the first end 1012 of the stator core 101, and the weld 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 groove 1011 via the first end 1012 and extend out of the winding groove 1011 via the second end 1013. The connection portion 1028 can be located at the first end 1012 of the stator core 101.

[0048] Exemplary, the insert member 1022 is a hairpin coil. Before being inserted into the winding groove 1011, the insert member 1022 may have two straight sides, the two straight sides being inserted into the winding slot 1011 via a first end 1012, and the portions of the two straight sides that are housed in the winding slot 1011 form a first insert portion 1026 and a second insert portion 1027, respectively. Continuing to refer to Figure 4, the portions of the two straight sides extending into the winding groove via a 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 installed at the welded ends of the stator winding 102. After inserting the insertion member 1022 into the stator core 101, the first extension 1029 and the second extension 1030 can be bent to facilitate welding of the first extension 1029 and the second extension 1030 to the other insertion member 1022.

[0050] Multiple winding grooves 1011 are arranged along the circumferential direction of the stator core 101, and two adjacent insert members 1022 may be directly connected or indirectly connected via other conductive structures. Exemplarily, 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 insert members 1022, respectively, to connect the two adjacent insert members 1022.

[0051] In some embodiments of the present invention, the insert member 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 grooves 1011, and exemplary, M = 6.

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

[0053] In some embodiments, the winding groove 1011 extends along the axial direction of the stator core 101 and penetrates the stator core 101 along the axial direction of the stator core 101. In these embodiments, the bending of the insert member 1022 during the process of inserting the insert member 1022 into the winding groove 1011 can be reduced, thereby lowering the difficulty of assembly.

[0054] In some embodiments, the number of winding grooves 1011 is 12 × N, where N is a positive integer. For example, the span between the first insertion portion 1026 and the second insertion portion 1027 is 6 winding grooves 1011.

[0055] In some embodiments, the first insertion portion 1026 and the second insertion portion 1027 are conductors 1021 in the corresponding winding grooves 1011. Multiple layers of conductors 1021 are installed in each winding groove 1011. The multiple layers of conductors 1021 are distributed sequentially along the direction from the bottom of the winding groove 1011 toward the opening of the winding groove 1011. Selectively, the multiple layers of conductors 1021 are stacked along the radial direction of the stator core 101.

[0056] The first insertion portion 1026 and the second insertion portion 1027 of the insertion member 1022 are the two conductors 1021 of the insertion member 1022. The conductors 1021 are the effective sides of the insertion member 1022 and are embedded in the stator core 101 to perform electromagnetic pole energy conversion. By installing multiple layers of conductors 1021, the electromagnetic pole energy conversion efficiency can be improved.

[0057] In some embodiments, the two conductors 1021 of the insert member 1022 are embedded in two winding grooves 1011, respectively. The multiple layers of conductors 1021 within each winding groove 1011 belong to multiple insert members 1022, respectively. The groove opening of the winding groove 1011 is 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 facing the groove opening.

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

[0059] In some embodiments, the stator winding 102 includes a plurality of phase windings, each phase winding includes at least one branch, and each branch includes a plurality of series-connected insert members 1022. The number of phase windings may be 2, 3, 4, or 5. Naturally, the number of phase windings may be greater than 5. The stator 10 in the embodiments of the present application can be applied to motors with different numbers of phases and can be adapted to different voltage and output ranges.

[0060] In some embodiments, the stator winding 102 may include three phase windings, which are 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 contain only one branch or multiple branches. The branches of a phase winding may also be called parallel-connected branches. To extend the range of use of the winding design and adapt to different voltage and output ranges, the number of branches in a phase winding may be any integer. Exemplarily, the phase winding in the embodiment of this application 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 of the first branch U1 are connected in series, and the multiple plug members 1022 of the second branch U2 are connected in series. This embodiment does not limit the number of plug members 1022 in the branches. The number of plug members 1022 in the branches can be freely adjusted as needed, thereby expanding the range of use of the winding design and adapting to different voltage and output ranges.

[0063] Figure 6 is a diagram showing the configuration of one phase winding of a stator provided in some embodiments of the present application, and Figure 7 is a schematic diagram of the first phase winding 1023 of a stator 10 provided in some embodiments of the present application.

[0064] As shown in Figure 7, in some embodiments, the stator winding 102 includes a first phase winding 1023 which includes a first branch and a second branch, the first branch which includes a first service drop end, a first lead end and a plurality of conductors 1021 connected in series between the first service drop end and the first lead end. The second branch includes a second service drop end, a second lead end and a plurality of conductors connected in series between the second service drop end and the second lead end. The first service drop end and the second service drop end are connected to conductors 1021 of different layers in the same winding groove 1011, respectively, and the first lead end and the second lead end are connected to conductors 1020 of different layers in the same winding groove 1011, respectively.

[0065] For illustrative purposes, Figure 7 shows the U-phase winding. The stator winding of this application will be described in detail below, using the U-phase winding as an example.

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

[0067] For easier understanding, in Figure 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 siding end and the first lead-out end is a positive terminal, and the other is a negative terminal. The electrode properties of the second siding end are the same as those of the first siding end, and the electrode properties of the second lead-out end are the same as those of the first lead-out end.

[0069] For illustrative purposes, the first and second service drop terminals will be assumed to be positive terminals, while the first and second lead-out terminals will both be assumed to be negative terminals. Correspondingly, in Figure 7, U1+ represents the first service drop terminal of the first branch U1, U1- represents the first lead-out terminal of the first branch U1, U2+ represents the second service drop terminal of the second branch U2, and U2- represents the second lead-out terminal of the second branch U2.

[0070] In the tables in Figure 7, N and S represent two magnetic poles of the stator, respectively. Exemplarily, a stator has eight magnetic poles, i.e., four pairs of magnetic poles.

[0071] The stator core is provided with multiple winding grooves 1011, and these multiple winding grooves 1011 are represented by a single row of numbers for the north pole and south pole. For example, in Figure 7, the stator core 101 is provided with 48 winding grooves 1011. In Figure 7, each of the 48 winding grooves 1011 is represented by a single row of numbers for the north pole and south pole, i.e., 1 to 48. Selectively, each magnetic pole corresponds to 6 winding grooves 1011.

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

[0073] The first branch U1 includes multiple series-connected conductors 1021. Exemplarily, in Table 1 of Figure 7, the multiple conductors of the first branch U1 are represented by the numbers distributed in the table. For example, the first branch U1 includes 64 conductors, and these 64 conductors are represented by the 64 numbers distributed in the table. The 64 conductors of the first branch U1 are connected sequentially according to their numbers, with the first siding end connected to the first conductor and the first lead end connected to the 64th conductor.

[0074] The second branch U2 includes multiple conductors connected in series. For example, in Table 2 of Figure 7, the multiple conductors of the second branch U2 are represented by the numbers distributed in the table. For instance, the second branch U2 includes 64 conductors, these 64 conductors are represented by the 64 numbers distributed in the table, and the 64 conductors of the second branch U2 are connected sequentially according to their numbers, with the second siding end connected to the first conductor and the second lead end connected to the 64th conductor.

[0075] In the embodiment of the present invention, by connecting the first and second service ends to conductors of different layers within the same winding groove 1011, respectively, and connecting the first and second lead ends to conductors of different layers within the same winding groove 1011, respectively, the distance between the first and second service ends and the distance between the first and second lead ends can be reduced, making it easier to connect the two branches and providing advantages in busbar arrangement and winding process implementation.

[0076] In several embodiments, as shown in Figure 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 toward the groove opening, the n-layer conductors are arranged as L1 layer, ..., L i Layers, ... and L n It is denoted as a layer, and 1 ≤ i ≤ n. The first and second service ends are L1 layer conductors and L in the same winding groove 1011. n Each is connected to a layer conductor. The first and second lead wire ends are connected to the L1 layer conductor and L in the same winding groove 1011. n Each layer conductor is connected to a separate conductor.

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

[0078] In the above embodiment, the first siding end U1+ and the first lead 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 facilitating connection of the first siding end U1+ and the first lead end U1- to the external busbar. The second siding end U2+ and the second lead end U2- are both L n L is connected to a layered conductor. n The layered conductors are positioned close to the inner ends along the radial direction of the stator core, thus facilitating the connection of the second siding end and second lead-out end to the external busbar.

[0079] In some embodiments of the present invention, both the first branch U1 and the second branch U2 include a plurality of series-connected insert members 1022, each insert member 1022 including at least one conductor. The insert member 1022 may have one or more conductors installed, and the conductors are installed in the winding groove 1011, resulting in a simple structure, ease of production, and small footprint, and the above-mentioned technology can improve the power density of the motor.

[0080] In some embodiments of the present invention, in the first branch U1, at least two interconnected conductors are located on the same layer along the direction from the first siding end to the first lead end. Conductors connected on the same layer can equilibrium the slot potential of the branch and reduce circulating losses between branches.

[0081] In the embodiment of the present application, referring again to Figure 7, the first branch includes 2k conductors, and along the direction from the first siding end to the second siding end, the first branch includes 2k conductors, each being A1, A2, ..., A k ..., A 2k-1 and A 2k It is written as, A k The second conductor and A k+1 The second conductor is L n It is a layered conductor, and from the first conductor A to the A k The second conductor is L1 layer along the first winding direction. n The layers are connected sequentially, and the A k+1 From the second conductor to the A 2k The second conductor is L along the second wave winding direction. n The layers are connected sequentially from the L1 layer, and the direction of the first wave winding is opposite to the direction of the second wave winding.

[0082] Specifically, the k-layer conductors of the branch are connected in series, from layer A1 to A k The layers are connected sequentially, and further A k From layer A 2k The layers are connected sequentially. For example, layer A1 is connected to the first siding end, A 2k The layer is connected to the first lead-out end.

[0083] The first winding direction may involve winding the conductor across two adjacent layers in a clockwise direction. For example, the conductor may start from the L1 layer of slot J, cross G winding grooves in a clockwise direction, then wind in the L2 layer of slot J+G, then cross G winding grooves in a clockwise direction, then wind in the L1 layer of slot J+2G, and so on, circulating until it returns to slot J, then wind in the L3 layer of slot J, and further circulating clockwise from the L3 layer of slot J, crossing G winding grooves in a clockwise direction, then wind in the L4 layer of slot J+G, then cross G winding grooves in a clockwise direction, then wind in the L3 layer of slot J+2G, and so on, circulating through the L of the winding grooves. n Wrap the layers around it.

[0084] The second winding direction is opposite to the first winding direction, and the conductor may be wound across two adjacent layers along a counterclockwise direction. Exemplarily, the conductor is wound in the L of the J slot. n From the layer anti After crossing G winding grooves in a clockwise direction, the L of slots J+G n-1 Wrap it around the layer, then anti After crossing G winding grooves in a clockwise direction, the L of slot J+2G n It is wound within the layer, and this cycle continues until it returns to slot J, then slot L n-2 Wrap it in layers, and further anti The L of slot J, in a clockwise direction. n-2 From the layer anti After crossing G winding grooves in a clockwise direction, the L of slots J+G n-3 Wrap it around the layer, then anti After crossing G winding grooves in a clockwise direction, the L of slot J+2G n-2 The wire is wound within the layer, and in this circulating manner, the L1 layer of the winding groove is wound around it.

[0085] The inventors noticed that within a winding groove, the greater the difference in conductor numbers between adjacent conductors, the greater the voltage difference between the two conductors. If the difference in conductor numbers between two adjacent conductors located within the same winding groove is too large, the voltage stress between the conductors in the winding groove becomes too high, affecting the insulation reliability of the stator winding.

[0086] The above installation method minimizes voltage drop between adjacent conductors within the same winding groove, thereby improving insulation reliability. In particular, this embodiment is not limited to the use of the above-described insert member; as long as the difference in conductor numbers satisfies the range requirement, this embodiment may employ other methods of winding the insert member.

[0087] In some embodiments of the present invention, in the second branch U2, at least two interconnected conductors 1021 are located on the same layer along the direction from the second siding end to the second lead end. In the above invention, the interconnected conductors 1021 on the same layer can also balance the slot potential of the branch and reduce circulating losses between branches.

[0088] In some embodiments of the present application, the second branch U2 includes 2k conductors, and along the direction from one end of the second siding to the other end of the second siding, the second branch includes 2k conductors, each being B1, B2, ..., B k , ..., B 2k-1 and B 2k It is written as, Section B k The second conductor and B k+1 The second conductor is an L1 layer conductor, and from the first conductor to the B1 conductor k The second conductor is L along the second wave winding direction. n The layers are connected sequentially from the L1 layer, and the B k+1 From the second conductor to the B 2k The second conductor is L1 layer along the first winding direction. n The layers are connected sequentially. This installation method minimizes voltage drop between adjacent conductors within the same winding groove.

[0089] In some embodiments of the present invention, the first phase winding includes 2p polar phase pairs, where p is a positive integer, and the multiple conductors 1021 of the first branch U1 are distributed within all polar phase pairs, and the multiple conductors 1021 of the second branch U2 are distributed within all polar phase pairs. According to the above invention, the imbalance of branch potential due to rotor eccentricity can be reduced.

[0090] In some embodiments of the present application, in a 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 toward the opening of the winding groove.

[0091] In some embodiments of the present application, two adjacent conductors located within the same winding groove are, respectively, A x Layer and B y This is denoted as a layer, where 1 ≤ x ≤ y ≤ k, and where |yx| ≤ k.

[0092] The larger the difference in conductor numbers, the larger the voltage difference between the two conductors. If the difference in numbers between two adjacent conductors located within the same winding groove 1011 is too large, the voltage stress on conductor 1021 within the winding groove 1011 becomes too high. Therefore, the above technical proposal sets |yx|≦k. This reduces the voltage stress between conductors within the winding groove 1011 and improves insulation reliability.

[0093] For example, the first siding end U1+ is connected to the first conductor of the first branch U1, and the first lead-out 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. Conductors 33, 35, 37, and 39 are all g-layer conductors, and conductors 34, 36, 38, and 40 are all h-layer conductors. Conductors 41, 43, 45, and 47 are all f-layer conductors. Conductors 42, 44, 46, and 48 are all e-layer conductors. Conductors 49, 51, 53, and 55 are all d-layer conductors. Conductors 50, 52, 54, and 56 are all c-layer conductors. Conductors 57, 59, 61, and 63 are all b-layer conductors. Conductors 58, 60, 62, and 64 are all a-layer conductors.

[0096] In some embodiments of the present invention, the 32nd and 33rd conductors of the first branch are both h-layer conductors. Conductors 1021 connected to the same layer can also equilibrium the slot potential of the branch and reduce circulating losses between branches.

[0097] In some embodiments, the first conductor connected to the first service drop end U1+ is located in the 13th winding groove, and the 64th conductor connected to the first lead-out end U1- is located in the 20th winding groove.

[0098] In some embodiments, the first conductor connected to the first service drop terminal U1+ and the 64th conductor connected to the first lead-out terminal U1- are both a-layer conductors. This embodiment is advantageous for busbar arrangement and facilitates connection of the first service drop terminal U1+ and the first lead-out terminal U1- to external circuits.

[0099] In some embodiments, the stator includes eight magnetic poles, and correspondingly, the phase windings include eight polarity phase sets. The 16 insertion members of branch U1 are distributed among the eight polarity phase sets, thereby reducing imbalance in branch potential due to rotor eccentricity.

[0100] In some embodiments, the span between a conductor connected to the first service drop end of the first branch U1 and a conductor connected to the second service drop end of the second branch U2 is less than or equal to the pole distance. Embodiments of the present invention can reduce the distance between the service drop ends of the two branches, facilitate the connection of the service drop ends of the two branches, and are advantageous for busbar arrangement and winding processes.

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

[0102] For example, the positive terminal is the second service drop terminal, and the negative terminal is the second lead-out terminal. In Figure 7, U2+ represents the second service drop terminal, and U2- represents the second lead-out terminal.

[0103] The second siding end U2+ is connected to the first conductor of the second branch U2, and the second lead end U2- is connected to the 64th conductor of the second branch U2.

[0104] In some embodiments, the 1st to 32nd conductors of the second branch are connected in series in order. Conductors 1, 3, 5, and 7 are all h-layer conductors, and conductors 2, 4, 6, and 8 are all g-layer conductors. Conductors 9, 11, 13, and 15 are all f-layer conductors. Conductors 10, 12, 14, and 16 are all e-layer conductors. Conductors 17, 19, 21, and 23 are all d-layer conductors. Conductors 18, 20, 22, and 24 are all c-layer conductors. Conductors 25, 27, 29, and 31 are all b-layer conductors. Conductors 26, 28, 30, and 32 are all a-layer conductors.

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

[0106] In some embodiments, the conductor connected to the first service drop end of the first branch U1 and the conductor 1021 connected to the second service drop end of the second branch U2 are provided in the same winding groove 1011. Embodiments of the present invention bring out the service drop ends of the two branches from within the same winding groove 1011, thereby further reducing the distance between the service drop ends of the two branches, facilitating the connection of the service drop ends of the two branches, and providing advantages for busbar arrangement and winding process implementation.

[0107] In the embodiment of the present invention, the 32nd and 33rd conductors of the second branch U2 are both a-layer conductors. Conductors connected to the same layer can also balance the slot potential of the branch and reduce circulating losses between branches.

[0108] In some embodiments, the first conductor connected to the second service drop end U2+ is located in the third winding groove of the first, and the 64th conductor connected to the second lead-out end U2- is located in the 0th winding groove of the second.

[0109] In some embodiments, the first conductor connected to the second service drop terminal U2+ and the 64th conductor connected to the second lead-out terminal U2- are both a-layer conductors. This embodiment is advantageous for busbar arrangement and facilitates connection of the first service drop terminal U1+ and the first lead-out terminal U1- to the external circuit.

[0110] In some embodiments, the stator 10 includes eight magnetic poles, and correspondingly, the phase windings include eight polarity phase sets. The 16 insertion members of the second branch U2 are distributed among the eight polarity phase sets, thereby reducing imbalance in branch potential due to rotor eccentricity.

[0111] In some embodiments, the span between a conductor connected to the first service drop end of the first branch U1 and a conductor connected to the second service drop end of the second branch U2 is less than or equal to the pole distance. Embodiments of the present invention can reduce the distance between the service drop ends of the two branches, facilitate the connection of the service drop ends of the two branches, and are 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. For example, the first branch U1 and the second branch U2 may be connected in series or in parallel.

[0113] As shown in Figure 7, the first conductor of the first branch U1 is connected to the first siding end U1+ of the first branch U1, and the first conductor of the second branch U2 is connected to the second lead end U2+ of the second branch U2. Selectively, the first conductor of the first branch U1 and the first conductor of the second branch U2 are provided in the same winding groove, i.e., winding groove 13. Two branches from the same winding groove 1011 The pullBy extending the lead wire ends, the distance between the lead wire ends of the two branches is further reduced, making it easier to connect the lead wire ends of the two branches, which is advantageous for busbar placement 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 arrangement and facilitates the connection of the incoming (U1+, U2+) and outgoing (U1-, U2-) terminals to the external circuit.

[0115] The U-phase winding shown in Figure 7 can balance the potential of each branch slot, reduce circulation losses between branches, mitigate branch potential imbalances due to rotor eccentricity, and reduce voltage stress on conductors within slots, while also being advantageous for busbar placement and winding process implementation. The embodiment of this application achieves a maximum voltage drop of 0.47U between adjacent conductors in the same winding groove. ph (U ph The voltage can be reduced to (where is the phase voltage). Compared to conventional stator windings, the embodiment of the present invention can reduce the voltage drop in the winding groove by 51.5%.

[0116] Figure 9 is a schematic diagram of one phase winding of a stator provided in some embodiments of the present application. Exemplarily, Figure 9 shows a U-phase winding.

[0117] As shown in Figure 9, in some embodiments, six conductors are housed in each winding groove. 6 Each conductor is located in layer a, layer b, layer c, layer d, layer e, and layer f, respectively.

[0118] In Figure 9, U1+ represents the first siding end of the first branch U1, U1- represents the first lead end of the first branch U1, U2+ represents the second siding end of the second branch U2, and U2- represents the second lead end of the second branch U2.

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

[0120] For example, the positive terminal is the first service drop terminal, and the negative terminal is the first lead-out terminal. In Figure 8, U1+ represents the first service drop terminal, and U1- represents the first lead-out terminal.

[0121] The first siding end U1+ is connected to the first conductor, and the first lead-out end U1- is connected to the 48th conductor.

[0122] In some embodiments, the 1st to 24th 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.

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

[0124] In the embodiment of the present invention, the 24th and 25th conductors of the first branch U1 are both f-layer conductors. These two insert members 1022 do not require interlayer welding and full-distance welding can be employed, thereby simplifying the welding process. Conductors connected to the same layer can also balance the slot potential of the branch and reduce circulating losses between branches.

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

[0126] In some embodiments, the first conductor connected to the first service drop terminal U1+ and the 48th conductor connected to the first lead-out terminal U1- are both a-layer conductors. This embodiment is advantageous for busbar arrangement and facilitates connection of the first service drop terminal U1+ and the first lead-out terminal U1- to external circuits.

[0127] In some embodiments, the stator includes eight magnetic poles, and correspondingly, the phase windings include eight polarity phase sets. By distributing the multiple insertion members 1022 of branch U1 to eight polarity phase sets, imbalances in branch potential due to rotor eccentricity can be reduced.

[0128] In some embodiments, the span between a conductor connected to the first service drop end of the first branch U1 and a conductor connected to the second service drop end of the second branch U2 is less than or equal to the pole distance. Embodiments of the present invention can reduce the distance between the service drop ends of the two branches, facilitate the connection of the service drop ends of the two branches, and are advantageous for busbar arrangement and winding processes.

[0129] For example, as shown in Figure 9, the positive terminal of the second branch U2 is the second service drop terminal, and the negative terminal is the second lead-out terminal. In Figure 9, U2+ represents the second service drop terminal, and U2- represents the second lead-out terminal.

[0130] The second siding end U2+ is connected to the first conductor, and the second lead-out end U2- is connected to the 48th conductor.

[0131] In some embodiments, as shown in Figure 9, the 1st to 24th conductors of the second branch U2 are connected in series in order. The 1st, 3rd, 5th, and 7th conductors are all f-layer conductors, and the 2nd, 4th, 6th, and 8th conductors are all e-layer conductors. The 9th, 11th, 13th, and 15th conductors are all d-layer conductors. The 10th, 12th, 14th, and 16th conductors are all c-layer conductors. The 17th, 19th, 21st, and 23rd conductors are all b-layer conductors. The 18th, 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. Conductors 25, 27, 29, and 31 are all h-layer conductors. Conductors 26, 28, 30, and 32 are all e-layer conductors. Conductors 33, 35, 37, and 39 are all d-layer conductors. Conductors 34, 36, 38, and 40 are all c-layer conductors. Conductors 41, 43, 45, and 47 are all b-layer conductors. Conductors 42, 44, 46, and 48 are all a-layer conductors.

[0133] In some embodiments, the conductor connected to the first service drop end of the first branch U1 and the conductor connected to the second service drop end of the second branch U2 are provided in the same winding groove 1011. Embodiments of the present invention draw out the service drop ends of the two branches from within the same winding groove 1011, thereby further reducing the distance between the service drop ends of the two branches, facilitating the connection of the service drop ends of the two branches, and providing advantages for busbar arrangement and winding process implementation.

[0134] In the embodiment of the present invention, the 24th and 25th conductors of the second branch are both layer a conductors. Conductors connected to the same layer can also equilibrium the slot potential of the branch and reduce circulating losses between branches.

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

[0136] In some embodiments, the first conductor connected to the second service drop terminal U2+ and the 48th conductor connected to the second lead-out terminal U2- are both a-layer conductors. This embodiment is advantageous for busbar arrangement and facilitates connection of the first service drop terminal U1+ and the first lead-out terminal U1- to the external circuit.

[0137] In some embodiments, the stator 10 includes eight magnetic poles, and correspondingly, the phase windings include eight polarity phase sets. By distributing the multiple insertion members 1022 of the second branch U2 to eight polarity phase sets, imbalances in branch potential due to rotor eccentricity can be reduced.

[0138] In some embodiments, the span between the conductor connected to the first service drop end of the first branch U1 and the conductor connected to the second service drop end of the second branch U2 is less than or equal to the inter-pole distance. Embodiments of the present invention can reduce the distance between the service drop ends of the two branches, facilitate connection of the service drop ends of the two branches, and are advantageous for busbar arrangement and winding processes. The 24 insert members 1022 of the second branch U2 are also distributed into 8 polarity phase pairs. Embodiments can reduce branch potential imbalance due to rotor eccentricity.

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

[0140] As shown in Figure 9, the first conductor of the first branch U1 is connected to the first lead-off end U1+ of the first branch U1, and the first conductor of the second branch U2 is connected to the second lead-off end U2+ of the second branch U2. Selectively, the first conductor of the first branch U1 and the first conductor of the second branch U2 are provided in the same winding groove 1011, i.e., winding groove 13. Leading out the lead-off ends of the two branches from within the same winding groove 1011 further reduces the distance between the lead-off ends of the two branches, facilitating the connection of the lead-off ends of the two branches and providing advantages in busbar placement and winding process implementation.

[0141] In some embodiments, the first conductor of the first branch U1 and the first of the first branch U1 48 The second conductor is an a-layer conductor, 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 arrangement and facilitates the connection of two incoming terminals (U1+, U2+) and two outgoing terminals (U1-, U2-) to the external circuit.

[0142] figure 9 The U-phase winding shown can balance the potential of each branch slot, reduce circulating losses between branches, mitigate branch potential imbalance due to rotor eccentricity, and reduce voltage stress on conductors within the slots, while also being advantageous for busbar placement and winding process implementation. An embodiment of the present invention achieves a maximum voltage drop of 0.46U between adjacent conductors within the same winding groove. ph (U ph It can be reduced to the phase voltage.

[0143] The embodiments of this application are applicable to windings with different numbers of layers and are advantageous for broadening the voltage and output ranges for winding use.

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

[0145] In some embodiments, all service ends in multiple phase windings are connected to conductors in different winding grooves. This embodiment can increase the distance between each service end and reduce the voltage stress between phases.

[0146] In some embodiments, all lead wire ends in multiple phase windings are connected to conductors in different winding grooves. This embodiment can increase the distance between each lead wire end and reduce the voltage stress between phases.

[0147] In some embodiments, all service drop ends and all lead ends are connected to conductors in different winding grooves. This embodiment can increase the distance between service drop ends and lead ends and reduce the voltage stress between phases.

[0148] Exemplary, as shown in Figure 10, the U-phase winding includes a first branch U1 and a second branch U2, where U1+ represents the first siding end of the first branch U1, U1- represents the first lead end of the first branch U1, U2+ represents the second siding end of the second branch U2, and U2- represents the second lead end of the second branch U2. Optionally, the U-phase winding in Figure 10 may be formed by merging the first branch U1 and the second branch U2 shown in Figure 11.

[0149] The V-phase winding includes a first branch V1 and a second branch V2, where V1+ represents the first siding end of the first branch V1, V1- represents the first lead end of the first branch V1, V2+ represents the second siding end of the second branch V2, and V2- represents the second lead 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 siding end of the first branch W1, W1- represents the first lead end of the first branch W1, W2+ represents the second siding end of the second branch W2, and W2- represents the second lead end of the second branch W2.

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

[0152] In some embodiments, the six conductors connected to the wiring terminals U1+, U1-, U2+, U2-, V1+, and V1- are all a-layer conductors. All of these wiring terminals are located close to the outer ends along the radial direction of the stator core, facilitating welding.

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

[0154] As shown in Figure 11, in some embodiments, the stator winding includes three phase windings, namely a U-phase winding, a V-phase winding, and a W-phase winding. Exemplarily, the three phase windings are connected in a triangular shape.

[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. The W-phase winding includes a first branch W1 and a second branch W2 connected in series.

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

[0157] As shown in Figure 12, in some embodiments, the stator winding includes three phase windings, namely U-phase winding, V-phase winding, and W-phase winding. Here, N=4, and the U-phase winding, V-phase winding, and W-phase winding are distributed within 16 winding grooves 1011, respectively.

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

[0159] The above installation method reduces circulating losses between the three phase windings and improves the motor's conversion efficiency.

[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. The W-phase winding includes a first branch W1 and a second branch W2 connected in series.

[0161] Figure 13 is a diagram showing the phase winding connections of the stator windings of a stator provided in some other embodiments of the present application.

[0162] As shown in Figure 13, in some embodiments, the stator winding includes three phase windings, namely a U-phase winding, a V-phase winding, and a W-phase winding. Exemplarily, the three phase windings are connected in a triangular configuration.

[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. The W-phase winding includes a first branch W1 and a second branch W2 connected in parallel.

[0164] Figure 14 is a diagram showing the phase winding connections of the stator windings of a stator provided in some further embodiments of the present application.

[0165] As shown in Figure 14, in some embodiments, the stator winding includes three phase windings, namely a U-phase winding, a V-phase winding, and a W-phase winding. Exemplarily, the three phase windings are connected in a star shape. 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] By referring to the different stator windings shown in Figures 11 to 14 and changing the connection method of the phase windings and the connection method of the phase winding branches, the number of turns in the series connection of the stator windings can be adjusted, thereby adapting to applications with different voltages and output levels.

[0167] Embodiments of the present invention further provide a motor including a stator provided in any one of the embodiments described above. Exemplarily, the motor further includes a rotor provided in a space formed by the inner walls of the stator core.

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

[0169] Embodiments of the present application further provide an electrical device including a motor provided by any one of the embodiments described above.

[0170] In some embodiments, the electrical device includes a power assembly comprising a reduction gear and the motor. The motor and reduction gear are connected by a power transmission. Specifically, the drive shaft of the motor and the input shaft of the reduction gear are connected by a power transmission member such as a coupling, allowing the driving force to be output from the motor to the reduction gear.

[0171] Embodiments of the present invention further provide a vehicle comprising the power assembly installed inside the vehicle and providing operating power to the vehicle. Specifically, in these embodiments, the vehicle may be a new energy vehicle specifically driven by electrical energy, for example. Here, the new energy vehicle may specifically be a hybrid electric vehicle, a pure electric vehicle, or a fuel cell electric vehicle, and may be a vehicle that employs a highly efficient energy storage device such as a supercapacitor, a flywheel battery, or a flywheel energy storage device as an electrical energy source.

[0172] Finally, it should be noted that the above embodiments are used solely to illustrate the technical proposal of the present application and are not intended to limit it. While the present application has been described in detail with reference to the embodiments described above, those skilled in the art can still modify the technical proposals described in the embodiments described above or substitute some of their technical features equally. However, it should be understood that such modifications or substitutions will not cause the essence of the corresponding technical proposal to deviate from the spirit and scope of the technical proposals in each embodiment of the present application.

[0173] Furthermore, the embodiments and features of the embodiments of this application can be combined with each other, as long as there is no contradiction.

[0174] Finally, it should be noted that the above embodiments are used solely to illustrate the technical proposal of the present application and are not intended to limit it. While the present application has been described in detail with reference to the embodiments described above, those skilled in the art can still modify the technical proposals described in the embodiments described above or substitute some of their technical features equally. However, it should be understood that such modifications or substitutions will not cause the essence of the corresponding technical proposal to deviate from the spirit and scope of the technical proposals in each embodiment of the present application. [Explanation of Symbols]

[0175] 10 staters 13 Winding groove 101 Stator Core 102 Stator winding 1011 Winding groove 1012 First end 1013 The second end 1020 Conductor 1021 Conductor 1022 Insertion part 1023 First phase winding 1026 First insertion part 1027 Second insertion part 1028 First connection 1029 First extension 1030 Second extension

Claims

1. It is the stator of the motor, The stator core includes a stator winding installed on the stator core, the inner wall of the stator core is provided with a plurality of winding grooves, and the stator winding includes 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 service drop end, a first lead-out end and a plurality of conductors connected in series between the first service drop end and the first lead-out end, the second branch including a second service drop end, a second lead-out end and a plurality of conductors connected in series between the second service drop end and the second lead-out end, The first service drop end and the second service drop end are connected to different layers of the conductor within the same winding groove, respectively, and the first lead end and the second lead end are connected to different layers of the conductor within the same winding groove, The first branch contains 2k conductors, and along the direction from the first siding end to the second siding end, the first branch contains 2k conductors, denoted as A1, A2, ..., Ak, ..., A2k-1 and A2k, The k-th conductor and the k+1th conductor are both Ln-layer conductors. The first conductor A to the k-th conductor A are connected sequentially from L1 layer to Ln layer along the first winding direction, and the k+1-th conductor A to the 2k-th conductor A are connected sequentially from Ln layer to L1 layer along the second winding direction, with the first winding direction being opposite to the second winding direction. stata.

2. The conductors in each winding groove are arranged in n layers, where n is a positive even number, and the n layers of the conductor are arranged in a direction from the bottom of the winding groove toward the opening of the winding groove, L １ Layer,...,L ｉ Layers, ... and L ｎ It is written as a layer, and 1 ≤ i ≤ n, The first and second service drop ends are located in the same winding groove L １ Layered conductor and L ｎ Each is connected to a layered conductor, and the first and second lead wire ends are connected to the same winding groove L １ Layered conductor and L ｎ Each layer conductor is connected to, The stator according to claim 1.

3. The first branch and the second branch each include a plurality of series-connected plug members, each plug member including at least one conductor. The stator according to claim 2.

4. In the second branch, along the direction from the second siding end to the second lead end, at least two mutually connected conductors are located on the same layer. The stator according to claim 1.

5. Said second branch includes 2k conductors, along the direction from said second lead-in end toward said second lead-in end, said second branch includes 2k conductors, each B １ , B ２ , ..., B ｋ , ..., B ２ｋ－１ and B ２ｋ are denoted as, Part B ｋ The second conductor and B ｋ＋１ The second conductor is L １ It is a layered conductor, B １ From the second conductor to the B ｋ The second conductor is L along the second wave winding direction. ｎ From layer L １ The layers are connected in order, and the aforementioned B ｋ＋１ From the second conductor to the B ２ｋ The second conductor is L along the first wave winding direction. １ From layer L ｎ The layers are connected in order. The stator according to claim 4.

6. The first phase winding contains 2p polar phase pairs, where p is a positive integer. The plurality of conductors of the first branch are distributed within all of the polarity phase sets, and the plurality of conductors of the second branch are distributed within all of the polarity phase sets. The stator according to claim 5.

7. In the winding groove where 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 the direction from the bottom of the winding groove toward the opening of the winding groove. The stator according to claim 5 or 6.

8. Two adjacent conductors located within the same winding groove are each A ｘ Layer and B ｙ It is written as a layer, and 1 ≤ x ≤ y ≤ k, Here, |y - x| ≤ k, The stator according to claim 5 or 6.

9. The inner wall of the stator core is provided with 12 × N winding grooves, where N is a positive integer, and the conductors of the first phase winding are distributed in 4 × N winding grooves. The stator winding further includes a second phase winding distributed in 4 × N winding grooves and a third phase winding distributed in 4 × N winding grooves. The stator according to claim 1.

10. Including the stator described in claim 1, Motor.

11. Including the motor described in claim 10, Electrical device.

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