Motor and its stator and power consuming device

Abstract

An embodiment of the present application provides a motor and its stator and a power consuming device, the stator includes a stator core and a stator winding disposed on the stator core, the inner wall of the stator core is provided with a number of winding slots, the stator winding includes conductors inserted into the number of winding slots, the stator winding includes a number of phase windings, each phase winding includes a first branch and a second branch.

Description

[Technical field]

[0001] This application relates to the field of power equipment technology, and more particularly to motors and their stators and power consumers. [Background technology]

[0002] With the development of the new energy automobile industry, the development of its drive motors is also moving in the direction of higher voltage, higher speed, integration, platformization, and miniaturization.

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

[0004] The present application provides a motor and a stator thereof that can reduce the voltage drop of the internal windings of the motor and reduce the internal energy loss of the motor.

[0005] According to a first aspect, an embodiment of the present application provides a stator for a motor, the stator including a stator core and a stator winding disposed in the stator core, the stator core having an inner wall formed with a plurality of winding slots, the stator winding including conductors inserted into the plurality of winding slots.

[0006] The conductors in each winding slot are set in n layers, where n is a positive even number, and the n layers of conductors are arranged in a direction from the bottom of the winding slot to the mouth of the winding slot, as shown in FIG. 1 layer, L 2 Layer, …… and L n The layer is called a layer.

[0007] The stator winding includes a plurality of phase windings, each of which includes a plurality of pole phase groups, and each pole phase group of the phase windings includes a first region, a second region, and a third region, the second region and the third region being located on both sides of the first region, respectively, and the conductors located in the first region are L 1 Layer~L nlayer, and the conductor located in the second region is L n / 2+1 Layer~L n layer, and the conductor located in the third region is L 1 Layer~L n / 2 It is a layer.

[0008] Each phase winding includes a first branch and a second branch, and the first branch includes 4k conductors connected in series in sequence, where k is a positive integer, and the 4k conductors A of the first branch 1 , ……, A 2k … and A 4k The second branch includes 4k conductors connected in series in sequence, and the 4k conductors of the second branch are denoted by B 1 , ……, B 2k … and B 4k Let us assume that.

[0009] A 1 ~A 2k , B 1 ~B 2k is distributed in the first region, A 2k+1 ~A 4k A part of them is distributed in the second area, 2k+1 ~A 4k The remaining part of the 2k+1 ~B 4k A part of the 1st region is distributed in the 2nd region, and B 2k+1 ~B 4k The remaining portion is distributed in a third region.

[0010] In the technical solution of the embodiment of the present application, the first half of the conductors in the first branch and the second branch are distributed in the first region, and the second half of the conductors are distributed in the second region and the third region, thus reducing the maximum voltage drop between adjacent different-phase conductors and the maximum voltage drop between adjacent same-phase conductors, improving the insulation reliability of the stator winding, reducing the internal loss of the motor, and improving the energy conversion efficiency of the motor. At the same time, the above structure can form a short-distance winding, reducing the harmonics of the winding, suppressing the torque ripple, improving the noise and vibration, and improving the efficiency.

[0011] In some embodiments, A2k+1 ~A 3k is distributed in the second region, A 3k+1 ~A 4k is distributed in the third region, B 2k+1 ~B 3k is distributed in the third region, B 3k+1 ~B 4k is distributed in the second region. By distributing the first branch in the first region, the second region and the third region in sequence, and distributing the second branch in the first region, the third region and the second region in sequence, the maximum voltage drop between adjacent different phase conductors can be reduced, the insulation reliability of the stator winding can be improved, the internal loss of the motor can be reduced, and the energy conversion efficiency of the motor can be increased. At the same time, the above structure can form a short-distance winding, reduce the harmonics of the winding, suppress the torque ripple, improve the noise and vibration, and increase the efficiency.

[0012] In some embodiments, A 1 and B 1 are located in the same winding slot. By placing the lead-in wire ends of the two branches in the same winding slot, it is possible to easily connect to external devices such as bus bars and to increase the efficiency of mounting the stator.

[0013] In some embodiments, A 1 is the L in the winding slot 1 layer conductor, B 1 is the L in the winding slot n The lead-in wire ends of the first and second branches are provided on the bottom and mouth layers of the same winding slot, respectively, to facilitate connection of the busbars.

[0014] In some embodiments, A 4k is the L in the winding slot n layer conductor, B 4k is the L in the winding slot n The lead-out wire ends of the first and second branches are provided on the bottom and mouth layers of the same winding slot, respectively, to facilitate connection of the busbars.

[0015] In some embodiments, the first branch is A 1 a first positive lead connected to A; 4K and a first negative lead connected to the second branch, 1 A second positive lead connected to B 4K and a second negative lead wire connected to the first branch. The positive lead wire and the negative lead wire can protrude outside the winding slot, which can improve the convenience of welding the lead-in wire ends and the lead-out wire ends and facilitate the connection between the external member and the first branch and the second branch.

[0016] In some embodiments, the first branch includes a first single conductor connector and a plurality of first dual conductor connectors, where the first single conductor connector includes one conductor and each first dual conductor connector includes two conductors. The first branch of the embodiments of the present application can employ a combination of various connectors to make the winding of the first branch more flexible.

[0017] In some embodiments, the number of first single conductor connectors is two, and one first single conductor connector is A 1 and another first single conductor connector includes A 4k The two first single conductor connectors may be a lead-in line end conductor and a lead-out line end conductor, respectively, facilitating connection of the first branch with an external member.

[0018] In some embodiments, the plurality of first dual conductor connectors includes a first connector, a second connector, and a third connector, where the span of the two conductors of the first connector is equal to the pole distance, the span of the two conductors of the second connector is smaller than the pole distance, and the span of the two conductors of the third connector is larger than the pole distance, and the connectors of different spans can be configured to accommodate connections between conductors of different spans and accommodate different conductor connection schemes.

[0019] In some embodiments, A 2k and A 2k+1 are the two conductors of the third connector, A 3k and A3k+1 are two conductors of the second connector. In the first branch, when jumping from the first region to the second region, a long-distance jumper is performed through the third connector, and when jumping between the second region and the third region, a short-distance jumper is performed through the second connector, and the above structure can improve the efficiency of the insertion and installation of the conductors.

[0020] In some embodiments, the second branch includes a second single conductor connector and a plurality of second dual conductor connectors, the second single conductor connectors including one conductor, each second dual conductor connector including two conductors, the second single conductor connectors being two, and one second single conductor connector being B. 1 and another first single conductor connector includes B 4k and the plurality of second dual conductor connectors include a fourth connector, a fifth connector, and a sixth connector, wherein the span of the two conductors of the fourth connector is equal to the pole distance, the span of the two conductors of the sixth connector is smaller than the fifth connector, and the span of the two conductors of the fifth connector is smaller than the pole distance.

[0021] In the second branch, the second single conductor connector can facilitate welding the second positive lead wire and the second negative lead wire, and the second double conductor connector can be respectively installed in two winding slots to reduce the occupied space and make the stator structure more compact. The two second single conductor connectors can be lead-in line end conductors and lead-out line end conductors, respectively, to facilitate the connection of the second branch with the external busbar. Connectors of different spans can be set to accommodate the connection between conductors of different spans and accommodate different conductor connection modes.

[0022] In some embodiments, B 2k and B 2k+1 are the two conductors of the fifth connector, B 3k and B 3k+1 are the two conductors of the sixth connector.

[0023] In the second branch, when jumping from the first area to the third area, a short-distance jumper is made via the fifth connector, and when jumping between the second area and the third area, a short-distance jumper is made via the sixth connector, and the above structure can improve the efficiency of inserting and attaching the conductor.

[0024] In some embodiments, the stator winding includes three phase windings, and the three phase windings employ a star or delta connection.

[0025] In some embodiments, the winding slots are in multiples of twelve.

[0026] In some embodiments, the number of winding slots is 48, n is 8, and the number of stator poles is 8.

[0027] According to a second aspect, an embodiment of the present application provides a motor, the motor including the stator of any one of the above embodiments.

[0028] According to a third aspect, an embodiment of the present application provides a power consuming device, the power consuming device including the motor of any one of the above embodiments. [Brief description of the drawings]

[0029] In order to more clearly explain the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments of the present application. It is obvious that the drawings described below are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on the drawings without exerting creative efforts. [Figure 1] FIG. 2 is a structural schematic diagram of a stator of a motor according to some embodiments of the present application. [Diagram 2] 1 is a cross-sectional schematic diagram of a stator according to some embodiments of the present application. [Diagram 3] FIG. 3 is an enlarged schematic diagram of block A in FIG. 2. [Figure 4]FIG. 2 is a schematic diagram of a distribution of a first region, a second region and a third region according to some embodiments of the present application. [Diagram 5] FIG. 2 is a schematic diagram of a pole group of a phase winding of a stator winding of a stator according to some embodiments of the present application. [Figure 6] FIG. 2 is a structural schematic diagram of a first single conductor connector of a stator according to some embodiments of the present application. [Figure 7] FIG. 2 is a structural schematic diagram of a first dual conductor connector of a stator according to some embodiments of the present application. [Figure 8] FIG. 13 is a structural schematic diagram of a second single-conductor connector of a stator according to some embodiments of the present application. [Figure 9] FIG. 2 is a structural schematic diagram of a second dual conductor connector of a stator according to some embodiments of the present application; [Figure 10] FIG. 2 is a schematic diagram of one phase winding of a stator according to some embodiments of the present application. [Figure 11] FIG. 2 is a schematic diagram of a three phase winding of a stator according to some embodiments of the present application. [Figure 12] FIG. 2 is a connection schematic diagram of a phase winding of a stator winding of a stator according to some embodiments of the present application. [Figure 13] FIG. 13 is a connection schematic diagram of a phase winding of a stator winding of a stator according to some further embodiments of the present application. [Figure 14] FIG. 13 is a connection schematic diagram of a phase winding of a stator winding of a stator according to still further some embodiments of the present application. [Figure 15] FIG. 13 is a connection schematic diagram of a phase winding of a stator winding of a stator according to further some embodiments of the present application.

[0030] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained based on the embodiments of the present application without the need for creative efforts by those skilled in the art are all within the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art in the technical field of this application, and the terms used in the specification of this application are only for describing specific embodiments and are not intended to limit this application, and the terms "comprises" and "has" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive "comprises". The terms "first", "second", etc. in the specification and claims of this application or the above drawings are not intended to describe a specific order or subordinate relationship, but are intended to distinguish different objects.

[0033] An "embodiment" referred to in this application 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 this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they mutually exclusive separate or alternative embodiments of other embodiments.

[0034] In the description of the present application, it should be explained that unless otherwise clearly defined or limited, the terms "attached", "connected", "connected" and "attached" should be understood in a broad sense, for example, may be a fixed connection, a removable connection, or an integral connection, may be a direct connection, may be an indirect connection through an intermediate medium, or may be communication between the insides of two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0035] The term "and / or" in this application merely describes the relationship between related objects and indicates that three relationships may exist, for example, A and / or B may represent three cases: A alone, A and B in combination, and B alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "or" relationship.

[0036] In the embodiments of the present application, the same reference numerals represent the same elements, and for the sake of brevity, detailed descriptions of the same elements in different embodiments are omitted. It should be understood that the thickness, length, width, etc. of various elements in the embodiments of the present application shown in the drawings, and the overall thickness, length, width, etc. of the integrated device are illustrative descriptions, and should not be construed as any limitation to the present application.

[0037] The term "plurality" as used herein refers to two or more (including two).

[0038] In the traction motor of a new energy vehicle, in order to improve the slot filling rate of the motor and improve the power density and torque density, a multi-layer conductor may be installed in the winding slot of the stator winding of the motor, and the conductors may be connected to form a stator winding. The stator winding generally adopts the form of a full-distance winding or a short-distance winding.

[0039] The inventors have found that in the related art, the harmonic content of the full-length winding is relatively high, and the voltage drop between the common-phase conductors in the slot is large, which reduces the insulation reliability and the motor energy conversion efficiency. The common-phase voltage drop and the different-phase voltage drop in the short-length winding slot are both relatively large, which results in low insulation reliability and large internal motor loss.

[0040] Based on the above reasons, the inventor has researched and designed a stator to effectively reduce the voltage drop between two adjacent different-phase conductors in the same winding slot and the voltage drop between the same-phase conductors in the same winding slot by changing the winding method of the stator winding, thereby improving the insulation reliability of the stator winding.

[0041] For ease of understanding, the following provides the following interpretations and explanations for the terminology previously appearing in this application.

[0042] Stator: The stationary, non-moving part of a motor whose function is to generate a rotating magnetic field.

[0043] Rotor: The rotating part in a motor, whose function is to effect the conversion between electrical and mechanical energy.

[0044] Span: The distance that two edges of the same element in a motor winding span the armature surface, generally expressed as the number of winding slots opened on the stator core.

[0045] Number of magnetic pole pairs P: The number of magnetic pole pairs is abbreviated as the number of pole pairs. The magnetic poles formed after the motor windings are energized appear in the form of pairs of N and S poles. The total number of magnetic poles is 2P.

[0046] Pole Distance: Pole distance is the distance each magnetic pole of a motor occupies around the circumference of the air gap. Pole distance may be expressed as the number of winding slots in the stator core. Illustratively, pole distance is Z / 2P, where Z is the total number of winding slots in the stator core.

[0047] Pole group: In an AC motor, when multiple coils belonging to the same phase winding under one pole distance are connected in series to form a group, it is called a pole group, or also called a coil group. The current direction and electromagnetic action of each coil in a pole group are all the same, and these several coils jointly generate magnetic poles in this phase winding.

[0048] Phase Winding: A phase winding is a set of windings connected in series or parallel in a certain way from one or more parallel-connected branches. The conductors in a phase winding generally span multiple pole distances, and the coils are connected together to form a whole.

[0049] FIG. 1 is a structural schematic diagram of a stator of a motor according to some embodiments of the present application; FIG. 2 is a cross-sectional schematic diagram of a stator according to some embodiments of the present application; FIG. 3 is an enlarged schematic diagram of block A in FIG. 2; FIG. 4 is a distribution schematic diagram of a first region, a second region, and a third region according to some embodiments of the present application; and FIG. 5 is a schematic diagram of a pole phase group of a phase winding of a stator winding of a stator according to some embodiments of the present application.

[0050] As shown in Fig. 1 and Fig. 2, some embodiments of the present application provide a stator 10 of a motor, and the stator 10 includes a stator core 101 and a stator winding 102 installed in the stator core 101. A plurality of winding slots 1011 are opened in an inner wall of the stator core 101. The stator winding 102 includes conductors 1021 inserted into the plurality of winding slots 1021. Referring to Fig. 3, the conductors 1021 in each winding slot 1011 are set in n layers, where n is a positive even number. The n layers of conductors 1021 are arranged in a direction from the bottom of the winding slot 1011 toward the groove opening of the winding slot 1011. 1 layer, L 2 Layer, …… and L n The layer is called a layer.

[0051] 4, the stator winding 102 includes a plurality of phase windings, each of which includes a plurality of pole phase groups, and each pole phase group of the phase windings includes a first region 301, a second region 302, and a third region 303, and the second region 302 and the third region 303 are located on both sides of the first region 301, respectively. The conductor 1021 located in the first region 301 is L 1 Layer~L n The conductor 1021 located in the second region 302 is L n / 2+1 Layer~L n The conductor 1021 located in the third region is L 1 Layer~L n / 2 It is a layer.

[0052] The phase winding includes a first branch U1 and a second branch U2, and the first branch U1 includes 4k conductors 1021 connected in series in sequence, where k is a positive integer, and the 4k conductors 1021 of the first branch U1 are designated by A1 , ……, A 2k … and A 4k The second branch U2 includes 4k conductors 1021 connected in series in sequence, and the 4k conductors 1021 of the second branch U2 are denoted by B 1 , ……, B 2k … and B 4k Let us assume that.

[0053] A 1 ~A 2k , B 1 ~B 2k is distributed in the first region 301, and A 2k+1 ~A 4k A part of the conductors 1021 is distributed in the second region 302, and A 2k+1 ~A 4k The remaining conductor 1021 is distributed in the third region 303, and B 2k+1 ~B 4k A part of the conductors 1021 is distributed in the second region 302, and B 2k+1 ~B 4k The remaining portion of the conductor 1021 is distributed in a third region 303 .

[0054] For example, A 2k+1 ~A 3k is distributed in the second region 302, and A 3k ~A 4k is distributed in the third region 303. 2k+1 ~B 3k is distributed in a third region 303, and B 3k ~B 4k is distributed in a second region 302.

[0055] Illustratively, the number n of conductors 1021 in the winding slots 1011 may be 2, 4, 6, 8, 16, or 32. The number of winding slots 1011 may be determined according to the number of phase windings in the stator 10, and may accommodate different voltage and power ranges depending on the range of use of the winding design. In some embodiments, n is 8, as shown in FIG. 6. Illustratively, L 1 Layer~L 8 The layers may be named a layer, b layer, c layer, d layer, e layer, f layer, g layer and h layer, respectively.

[0056] The embodiment of the present application does not limit the shape of the conductor 1021. Illustratively, the cross section of the conductor 1021 may be circular, rectangular, elliptical, racetrack, etc. Optionally, the cross section of the conductor 1021 is rectangular, which can increase the cross-sectional area of ​​the conductor 1021 and can fit into the rectangular insertion slot of the core to improve the slot filling rate of the stator core, and the rectangular conductor 1021 may be called a rectangular wire conductor.

[0057] Exemplarily, the winding slots 1011 are spaced apart along the circumferential direction of the stator core 101. Optionally, the winding slots 1011 are uniformly spaced apart along the circumferential direction of the stator core 101, in other words, the winding slots 1011 are equally spaced apart along the circumferential direction.

[0058] The stator winding includes multiple phase windings, and 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 of the embodiments of the present application can be applied to motors with different phase numbers and can be adapted to different voltage and power ranges.

[0059] The number of pole phase groups of the phase winding is a positive even number. The first region 301, the second region 302 and the third region 303 of each pole phase group are distributed in three different winding slots 1011. Exemplarily, the second region 302 is located on the clockwise side of the first region 301 and the third region 302 is located on the counterclockwise side of the first region 301, or the second region 302 is located on the counterclockwise side of the first region 301 and the third region 303 is located on the clockwise side of the first region 301.

[0060] Each phase winding may include multiple branches. The branches of a phase winding may be referred to as parallel-connected branches. The number of branches of a phase winding may be any integer to expand the range of use of the winding design and to accommodate different voltage and power ranges. Illustratively, the phase winding of the embodiment of the present application includes a first branch U1 and a second branch U2 that are connected in parallel, where the first branch U1 may be one or more, and the second branch U2 may be one or more.

[0061] For example, from the positive electrode to the negative electrode of the first branch U1, A 1 , ……, A 2k … and A 4k are connected in series in order. From the positive pole to the negative pole of the second branch U2, B 1 , ……, B 2k … and B 4k are connected in series in order.

[0062] The inventors have noted that within the same winding slot 1011, the voltage drop between adjacent in-phase conductors 1021 is related to the difference between the numbers of the conductors 1021. Illustratively, adjacent in-phase conductors 1021 within the same winding slot 1011 are each designated A x and B y where 1≦x≦4k, 1≦y≦4k. The larger the value of |xy|, the larger the voltage drop between adjacent common-phase conductors 1021 becomes, and the higher the insulation requirements of the stator windings of the motor become.

[0063] In the embodiment of the application, the numbers of the conductors 1021 distributed within the first region 301 do not exceed 2k, and the difference in numbers between adjacent same-phase conductors 1021 is also less than 2k. In this way, by reducing the maximum voltage drop between adjacent same-phase conductors 1021 within the first region 301, the insulation reliability of the stator winding can be improved, the internal loss of the motor can be reduced, and the energy conversion efficiency of the motor can be increased.

[0064] The numbers of the conductors 1021 distributed in the second region 302 and the third region 303 are all greater than 2k, so that the difference in numbers of adjacent in-phase conductors 1021 is less than 2k. In this way, the maximum voltage drop between adjacent in-phase conductors 1021 in the second region 302 and the maximum voltage drop between adjacent in-phase conductors 1021 in the third region 303 are reduced, thereby improving the insulation reliability of the stator winding, reducing the internal loss of the motor, and increasing the energy conversion efficiency of the motor.

[0065] In the embodiment of the present application, the second region 302 occupies only a portion of the winding slot 1011, and the third region 303 occupies only a portion of the winding slot 1011, so that the phase winding adopts a short distance winding type. The short distance winding can reduce the winding harmonics and improve the motor torque ripple and noise vibration.

[0066] Since the phase windings in the embodiment of the present application adopt a short distance winding type, adjacent different phase conductors exist in some winding slots 1011. Exemplarily, the second region 302 of one phase winding and the third region 303 of another phase winding are distributed in the same winding slot 1011.

[0067] The inventors have noted that within the same winding slot 1011, the voltage drop between adjacent opposite-phase conductors is related to the sum of the numbers of the conductors 1021. Illustratively, adjacent in-phase conductors within the same winding slot 1011 are each designated A x and A y (B x and B y A may be x and B y The smaller the value of x+y, the larger the voltage drop between adjacent phase conductors, and the higher the insulation requirement of the stator winding by the electrodes.

[0068] In the embodiment of the present application, if the numbers of the conductors distributed in the second region 302 and the third region 303 are all greater than 2k, the numbers of the conductors in the same winding slot 1011 and belonging to different phase windings are all greater than 2k, and the sum of the numbers of adjacent different-phase conductors is also greater than 4k, thereby reducing the maximum voltage drop between adjacent different-phase conductors, improving the insulation reliability of the stator winding, reducing the internal loss of the motor, and improving the energy conversion efficiency of the motor.

[0069] In some embodiments of the present application, the winding slots 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 .

[0070] In the embodiment of the present application, the number of winding slots 1011 is 12·M, where M is a positive integer.

[0071] In some embodiments of the present application, the stator winding may include three phase windings, the three phase windings being a first phase winding, a second phase winding and a third phase winding, respectively. Illustratively, the first phase winding is a U-phase winding, the second phase winding is a V-phase winding, and the third phase winding is a W-phase winding.

[0072] In some embodiments of the present application, 2k+1 ~A 3k is distributed in the second region 302, and A 3k+1 ~A 4k is distributed in a third region 303, and B 2k+1 ~B 3k is distributed in a third region 303, and B 3k+1 ~B 4k is distributed in a second region 302.

[0073] In the present application, conductors 1021 having numbers greater than 3k can be present in both the second region 302 and the third region 303, and by increasing the sum of the numbers of adjacent different-phase conductors in this manner, the maximum voltage drop between adjacent different-phase conductors can be reduced, the insulation reliability of the stator winding can be improved, the internal loss of the motor can be reduced, and the energy conversion efficiency of the motor can be increased.

[0074] In some embodiments of the present application, the first branch U1 is wound in the order of the first region 301 of the plurality of pole groups, the second region 302 of the plurality of pole groups, and the third region 303 of the plurality of pole groups using a wave winding style. The second branch U2 is wound in the order of the first region 301 of the plurality of pole groups, the third region 303 of the plurality of pole groups, and the second region 302 of the plurality of pole groups using a wave winding style.

[0075] By wrapping the first branch U1 and the second branch U2 using a wave winding style, the number of connecting wires between the conductors 1021 can be reduced and the winding process of the stator winding can be simplified.

[0076] In some embodiments of the present application, 1 and B 1 are located in the same winding slot 1011. By placing the lead-in wire ends of the two branches in the same winding slot 1011, it is possible to facilitate connection to external members such as bus bars and to increase the efficiency of mounting the stator.

[0077] In some embodiments of the present application, 1 is the L in the winding slot 1011 1 Layer conductor 1021, B 1 is the L in the winding slot n The lead-in wire ends of the first branch U1 and the second branch U2 are provided on the bottom layer and the mouth layer of the same winding slot 1011, respectively, to facilitate busbar connection.

[0078] In some embodiments of the present application, 4k is the L in the winding slot 1011 n Layer conductor 1021, B 4k is the L in the winding slot n The lead-out wire ends of the first branch U1 and the second branch U2 are provided on the bottom layer and the mouth layer of the same winding slot 1011, respectively, to facilitate connection of the bus bars.

[0079] FIG. 5 is a structural schematic diagram of one phase winding in some embodiments of the present application. As shown in FIG. 5, in some embodiments of the present application, the first branch U1 is 1 A first positive lead U1+ connected to A 4K The second branch U2 includes a first negative lead U1- connected to B 1 A second positive lead U2+ connected to B 4K The first positive electrode lead wire U1+, the first negative electrode lead wire U1-, the second positive electrode lead wire U2+, and the second negative electrode lead wire U2- can protrude outside the winding slot 1011, making it easy to connect an external member to the first branch U1 and the second branch U2.

[0080] In some embodiments of the present application, the first branch U1 includes multiple serially connected connectors, each connector including at least one conductor 1021.

[0081] 6 and 7, in some embodiments of the present application, the first branch U1 includes a first single conductor connector 1031 and a plurality of first dual conductor connectors 1022, where the first single conductor connector 1031 includes one conductor 1021 and each of the first dual conductor connectors 1022 includes two conductors 1021. The conductor 1021 of the first single conductor connector 1031 and the conductor 1021 of the first dual conductor connector 1022 are different conductors in the first branch U1.

[0082] The first branch U1 in the embodiment of the present application can adopt various connector combinations to make the winding manner of the first branch U1 more flexible.

[0083] In some embodiments, the first dual conductor connector 1022 may include a connection portion 1028 that connects the two conductors 1021 .

[0084] In some embodiments, the two conductors 1021 may be connected by welding. Illustratively, when the span between the two conductors 1021 is relatively small, for example, the pitch between the two conductors 1021 is equal to or smaller than two winding slots, the two conductors 1021 may be connected by a direct welding manner.

[0085] In some embodiments, the first dual conductor connector 1022 further includes two extensions, one extending from an end remote from the connection of one conductor and another extending from an end remote from the connection of the other conductor, protruding from the winding slot 1011 to facilitate connection with other connectors.

[0086] Exemplarily, the first dual conductor connector 1022 may be a hairpin coil. Before being inserted into the winding slot 1011, the first dual conductor connector 1022 may include two straight sides, which are inserted into the winding slot 1011 through one end of the stator core, and the portions of the two straight sides accommodated in the winding slot 1011 respectively form two conductors 1021, and the portions of the two straight sides protruding through the other end of the stator core form two extensions.

[0087] The two extensions are a first extension 1029 and a second extension 1030, both of which are installed at the welding ends of the stator windings. After the dual conductor connector is inserted into the stator core, the first extension 1029 and the second extension 1030 may be bent to facilitate welding the first extension 1029 and the second extension 1030 to other connectors.

[0088] In some embodiments of the present application, the first single conductor connector 1031 is two, and one first single conductor connector 1031 is A 1 and another first single conductor connector 1031 includes A 4kThe two first single conductor connectors 1031 may be lead-in and lead-out line end conductors respectively, facilitating the connection of the first branch U1 with a bus bar of an external component.

[0089] In some embodiments of the present application, the plurality of first dual conductor connectors 1022 includes a first connector, a second connector, and a third connector, where the span of the two conductors of the first connector is equal to the pole distance, the span of the two conductors of the second connector is smaller than the pole distance, and the span of the two conductors of the third connector is larger than the pole distance.

[0090] The multiple first dual conductor connectors 1022 may be divided into multiple types according to the difference in span. The first connector is a first dual conductor connector 1022 whose span is equal to the pole distance. The second connector may be a first dual conductor connector 1022 whose span is smaller than the pole distance. The third connector may be a first dual conductor connector 1022 whose span is larger than the pole distance.

[0091] The connectors 1022 of different spans can be configured to accommodate connections between the conductors 1021 of different spans and accommodate different conductor connection manners. As can be seen, the structures of the first connector, the second connector and the third connector are all as shown in Fig. 6, with the difference being that the spans between the two conductors 1021 in different connectors are different.

[0092] In some embodiments of the present application, the number of the third connectors is one, and the third connector is A 2k and A 2k+1 The second connector includes two conductors 1021 and a connecting portion 1028 that connects the two conductors 1021. The number of the second connectors is one, and the second connector includes 3k and A 3k+1 The first connector includes two conductors 1021 and a connecting portion 1028 that connects the two conductors 1021. The number of the first connectors is plural, and A 2 ~A 2k-1 , A 2k+2 ~A3k-1 and A 3k+2 ~A 4k The conductors 1021 are connected in sequence between two adjacent conductors 1021, and a plurality of connecting portions 1028 are connected between the two adjacent conductors 1021.

[0093] In the first branch U1, when jumping from the first region 301 to the second region 302, a long-distance jumper is performed via the third connector, and when jumping between the second region 302 and the third region 303, a short-distance jumper is performed via the second connector, and the above structure can improve the efficiency of conductor insertion and installation.

[0094] 8 and 9, in some embodiments of the present application, the second branch U2 includes a second single conductor connector 1041 and a plurality of second dual conductor connectors 1042, where the second single conductor connector 1041 includes one conductor 1021 and each of the second dual conductor connectors 1042 includes two conductors 1021. The conductor 1021 of the second single conductor connector 1041 and the conductor 1021 of the second dual conductor connector 1042 are different conductors in the second branch U2.

[0095] In some embodiments of the present application, the second single conductor connector 1041 is two, and one second single conductor connector 1041 is B 1 and another second single conductor connector 1041 includes B 4k Includes.

[0096] In some embodiments of the present application, the second dual conductor connector includes a fourth connector, a fifth connector, and a sixth connector, where the span of the two conductors 1021 of the fourth connector is equal to the pole distance, the span of the two conductors 1021 of the sixth connector is smaller than that of the fifth connector, and the span of the two conductors 1021 of the fifth connector is smaller than the pole distance.

[0097] As can be seen, the structures of the fourth connector, the fifth connector and the sixth connector are all as shown in FIG. 8, with the difference being that the span between the two conductors 1021 in different connectors is different.

[0098] The second dual conductor connectors 1042 may be divided into a plurality of types according to differences in span. The fourth connector is a second dual conductor connector 1042 having a span equal to the pole distance. The fifth connector may be a second dual conductor connector 1042 having a span smaller than the pole distance. The third connector may be a second dual conductor connector 1042 having a span smaller than that of the fifth connector.

[0099] In some embodiments of the present application, the number of the fifth connector is one, and the fifth connector is B 2k and B. 2k+1 The sixth connector includes two conductors 1021 and a connecting portion 1028 that connects the two conductors 1021. The number of the sixth connector is one, and the sixth connector includes B 3k and B. 3k+1 The fourth connector includes two conductors 1021 and a connecting portion 1028 connecting the two conductors 1021. The number of the fourth connectors is plural, and B 2 ~B 2k-1 , B 2k+2 ~B 3k-1 and B. 3k+2 ~B 4k The conductors 1021 are connected in sequence between two adjacent conductors 1021, and a plurality of connecting portions 1028 are connected between the two adjacent conductors 1021.

[0100] In the second branch U2, the second single conductor connector 1041 can facilitate welding the second positive lead wire U2+ and the second negative lead wire U2-, and the second double conductor connectors 1042 are respectively installed in the two winding slots 1011 to reduce the occupied space and make the structure of the stator 10 more compact. The two second single conductor connectors 1041 can be lead-in line end conductors and lead-out line end conductors, respectively, to facilitate the connection between the second branch U2 and the external busbar. Connectors of different spans can be set to accommodate the connection between the conductors 1021 of different spans and accommodate different conductor 1021 connection modes.

[0101] In some embodiments of the present application, B 2k and B 2k+1 are the two conductors of the fifth connector, B 3k and B 3k+1 are the two conductors 1021 of the sixth connector.

[0102] In the second branch U2, when jumping from the first region 301 to the third region 303, a short-distance jumper is made via the fifth connector, and when jumping between the second region 302 and the third region 303, a short-distance jumper is made via the sixth connector, and the above structure can improve the efficiency of inserting and installing the conductor.

[0103] In some embodiments of the present application, the stator winding 102 includes three phase windings, the three phase windings adopting a star or delta connection. Optionally, the three phase windings adopt a star connection.

[0104] In some embodiments of the present application, the number of winding slots 1011 is a multiple of twelve.

[0105] In some embodiments of the present application, the number of winding slots 1011 is 48, n is 8, and the number of poles of the stator 10 is 8. Each magnetic pole corresponds to six winding slots 1011.

[0106] Fig. 10 is a schematic diagram of one phase winding of the stator 10 according to some embodiments of the present application. By way of example, Fig. 10 shows the U-phase winding. The following will take the U-phase winding as an example to describe the stator winding of the present application in detail.

[0107] As shown in FIG. 10, the U-phase winding includes a plurality of branches, two of which are designated as a first branch U1 and a second branch U2.

[0108] For ease of understanding, the first table shows the first branch U1, the second table shows the second branch U2, and the third table shows the U-phase winding.

[0109] In FIG. 10, U1+ represents the first positive lead of the first branch U1, U1- represents the first negative lead of the first branch U1, U2+ represents the second positive lead of the second branch U2, and U2- represents the second negative lead of the second branch U2.

[0110] N and S respectively represent two magnetic poles of the stator 10. Illustratively, the stator is provided with eight magnetic poles, i.e., four magnetic pole pairs.

[0111] The stator core is provided with a plurality of winding slots 1011, and the plurality of winding slots 1011 are represented by numbers in a line below the N pole and S pole. Exemplarily, the stator core 101 is provided with 48 winding slots 1011. In FIG. 10, the 48 winding slots are represented by numbers in a line below the N pole and S pole, i.e., 1 to 48. Each magnetic pole corresponds to six winding slots 1011.

[0112] Each winding slot 1011 accommodates multiple layers of conductors 1021. Exemplarily, in Fig. 7, each winding slot 1011 accommodates eight conductors 1021. The eight conductors 1021 are located on layers a, b, c, d, e, f, g, and h, respectively.

[0113] The branch U1 includes 64 conductors 1021 that are connected in sequence. In Fig. 10, the 64 conductors 1021 are represented by 64 item numbers distributed in a table. The 64 conductors 1021 are connected in sequence according to the item numbers. The solid arrows in Fig. 10 represent the connection manner at the welded ends of the 64 conductors 1021, and the dotted arrows represent the connection manner at the inserted ends of the conductors 1021.

[0114] The first positive lead U1+ is connected to the first conductor 1021 and the first negative lead U1- is connected to the 64th conductor 1021.

[0115] In some embodiments of the present application, the conductors 1021 numbered 1 to 32 of the first branch U1 are connected in series in order. The conductors 1021 numbered 1, 3, 5, and 7 are all conductors 1021 of the a layer, and the conductors 1021 numbered 2, 4, 6, and 8 are all conductors 1021 of the b layer. The conductors 1021 numbered 9, 11, 13, and 15 are all conductors 1021 of the c layer. The conductors 1021 numbered 10, 12, 14, and 16 are all conductors 1021 of the d layer. The conductors 1021 numbered 17, 19, 21, and 23 are all conductors 1021 of the e layer. The conductors 1021 numbered 18, 20, 22, and 24 are all conductors 1021 of the f layer. The conductors 1021 numbered 25, 27, 29, and 31 are all conductors 1021 of the g layer. The conductors 1021 numbered 26, 28, 30, and 32 are all conductors 1021 in layer h.

[0116] In some embodiments of the present application, the conductors 1021 of the first branch U1, numbered 33 to 64, are connected in series in order. The conductors 1021 of the 33rd, 35th, 37th, and 39th are all conductors 1021 of the h-layer, and the conductors 1021 of the 34th, 36th, 38th, and 40th are all conductors 1021 of the g-layer. The conductors 1021 of the 41st, 43rd, 45th, and 47th are all conductors 1021 of the f-layer. The conductors 1021 of the 42nd, 44th, 46th, and 48th are all conductors 1021 of the e-layer. The conductors 1021 of the 49th, 51st, 53th, and 55th are all conductors 1021 of the d-layer. The conductors 1021 of the 50th, 52th, 54th, and 56th are all conductors 1021 of the c-layer. The conductors 1021 numbered 57, 59, 61, and 63 are all conductors 1021 in layer b. The conductors 1021 numbered 58, 60, 62, and 64 are all conductors 1021 in layer a.

[0117] In some embodiments of the present application, the conductors 1021 at 32 and 33 of the first branch U1 are both conductors in layer h. The conductors 1021 connected to the same layer can balance the slot potentials of the branches and reduce the circulation loss between the branches.

[0118] In some embodiments of the present application, conductor number 1 1021 associated with first positive lead U1+ is located in winding slot number 14, and conductor number 64 1021 associated with first negative lead U1- is located in winding slot number 9.

[0119] In some embodiments of the present application, the No. 1 conductor 1021 connected to the first positive lead wire U1+ and the No. 64 conductor 1021 connected to the first negative lead wire U1- are both conductors 1021 in layer a. This embodiment is advantageous for the arrangement of bus bars, and facilitates the connection of the first positive lead wire U1+ and the first negative lead wire U1- to members such as bus bars.

[0120] In some embodiments of the present application, the stator includes eight magnetic poles, and the phase winding accordingly includes eight pole groups. The 64 conductors of the first branch U1 are distributed among the eight pole groups to reduce the branch potential imbalance caused by the rotor eccentricity.

[0121] In some embodiments of the present application, the span between the conductor 1021 connected to the first positive lead U1+ of the first branch U1 and the conductor 1021 connected to the second positive lead U2+ of the second branch U2 is equal to or less than the pole distance. The embodiments of the present application can reduce the pitch of the lead-in wire ends of the two branches, which makes it easier to realize the connection of the lead-in wire ends of the two branches, and is favorable for the arrangement of the busbar and the implementation of the winding process.

[0122] The second branch U2 includes 64 conductors 1021. In Fig. 10, the 64 conductors 1021 are represented by 64 item numbers distributed in a table. The 64 conductors 1021 are connected in order according to the item numbers. The solid arrows in Fig. 10 represent the connection manner at the welded ends of the 64 conductors 1021, and the dotted arrows represent the connection manner at the inserted ends of the conductors 1021.

[0123] In FIG. 10, U2+ represents the second positive lead and U2- represents the second negative lead.

[0124] The second positive lead U2+ is connected to the first conductor 1021 of the second branch U2, and the second negative lead U2- is connected to the sixty-fourth conductor 1021 of the second branch U2.

[0125] In some embodiments of the present application, the conductors 1021 numbered 1 to 32 of the second branch U2 are connected in series in order. The conductors 1021 numbered 1, 3, 5, and 7 are all conductors 1021 of the h layer, and the conductors 1021 numbered 2, 4, 6, and 8 are all conductors 1021 of the g layer. The conductors 1021 numbered 9, 11, 13, and 15 are all conductors 1021 of the f layer. The conductors 1021 numbered 10, 12, 14, and 16 are all conductors 1021 of the e layer. The conductors 1021 numbered 17, 19, 21, and 23 are all conductors 1021 of the d layer. The conductors 1021 numbered 18, 20, 22, and 24 are all conductors 1021 of the c layer. The conductors 1021 numbered 25, 27, 29, and 31 are all conductors 1021 of the b layer. The conductors 1021 numbered 26, 28, 30, and 32 are all conductors 1021 in layer a.

[0126] In some embodiments of the present application, the conductors 1021 of the second branch U2, numbered 33 to 64, are connected in series in order. The conductors 1021 of the 33rd, 35th, 37th, and 39th are all conductors 1021 of the a-layer, and the conductors 1021 of the 34th, 36th, 38th, and 40th are all conductors 1021 of the b-layer. The conductors 1021 of the 41st, 43rd, 45th, and 47th are all conductors 1021 of the c-layer. The conductors 1021 of the 42nd, 44th, 46th, and 48th are all conductors 1021 of the d-layer. The conductors 1021 of the 49th, 51st, 53th, and 55th are all conductors 1021 of the e-layer. The conductors 1021 of the 50th, 52th, 54th, and 56th are all conductors 1021 of the f-layer. The conductors 1021 numbered 57, 59, 61, and 63 are all conductors 1021 in the g-layer. The conductors 1021 numbered 58, 60, 62, and 64 are all conductors 1021 in the h-layer.

[0127] In some embodiments of the present application, the conductor 1021 connected to the first positive lead wire U1+ of the first branch U1 and the conductor 1021 connected to the second positive lead wire U2+ of the second branch U2 are provided in the same winding slot 1011. The embodiments of the present application pull out the lead-in wire ends of the two branches U2 from within the same winding slot 1011, thereby further reducing the pitch of the lead-in wire ends of the two branches, making it easier to realize the connection of the lead-in wire ends of the two branches, and is advantageous for the arrangement of the busbar and the implementation of the winding process.

[0128] In the embodiment of the present application, the 32nd conductor 1021 and the 33rd conductor 1021 of the second branch U2 are both conductors 1021 in layer a. The conductors 1021 connected to the same layer can balance the slot potentials of the branches and reduce the circulation loss between the branches.

[0129] In some embodiments of the present application, conductor number 1 1021 associated with the second positive lead U2+ is located in winding slot number 14, and conductor number 64 1021 associated with the second negative lead U2- is located in winding slot number 7.

[0130] In some embodiments of the present application, the No. 1 conductor 1021 connected to the second positive lead wire U2+ and the No. 64 conductor 1021 connected to the second negative lead wire U2- are both h-layer conductors 1021. This embodiment is advantageous in terms of busbar arrangement, and facilitates connection of the second positive lead wire U2+ and the second negative lead wire U2- to an external circuit.

[0131] In some embodiments of the present application, the stator includes eight magnetic poles, and the phase winding accordingly includes eight pole groups. The 64 conductors 1021 of the second branch U2 are distributed among the eight pole groups, which can reduce the branch potential imbalance caused by the rotor eccentricity.

[0132] In some embodiments of the present application, the branches of the phase winding may be connected in series or in parallel. Exemplarily, the first branch U1 and the second branch U2 may be connected in series or in parallel.

[0133] 10, the first conductor 1021 of the first branch U1 is connected to the first positive lead wire U1+ of the first branch U1, and the first conductor 1021 of the second branch U2 is connected to the second positive lead wire U2+ of the second branch U2. Optionally, the first conductor 1021 of the first branch U1 and the first conductor 1021 of the second branch U2 are arranged in the same winding slot, i.e., the winding slot 14. By drawing out the lead-in wire ends of the two branches from the same winding slot, the pitch of the lead-in wire ends of the two branches is further reduced, and the connection of the lead-in wire ends of the two branches is easily realized, which is favorable for the arrangement of the busbar and the implementation of the winding process.

[0134] In some embodiments, the first conductor 1021 of the first branch U1 and the 64th conductor 1021 of the first branch U1 are both conductors 1021 of layer a, and the first conductor 1021 of the second branch U2 and the 64th conductor 1021 of the second branch U1 are both conductors 1021 of layer h. This embodiment is advantageous in terms of busbar arrangement, and facilitates connection of the two lead-in line ends (U1+, U2+) and the two lead-out line ends (U1-, U2-) to an external circuit.

[0135] In some embodiments of the present application, the stator winding 102 includes three phase windings, and the three phase windings adopt a star connection.

[0136] Illustratively, the steady-state voltage drop of adjacent phase conductors 1021 in the same winding slot 1011 is expressed by the formula [(2*4k-xy) / 4k]*U dc It can be calculated as U / 2. dc is the bus voltage. x and y are the numbers of two adjacent different-phase conductors 1021, respectively. 4k is the total number of conductors 1021 in the first branch. The maximum voltage drop of the different-phase conductors 1021 in the same winding slot in the embodiment of the present application is 0.29U dc It is.

[0137] The steady-state voltage drop of adjacent in-phase conductors 1021 in the same winding slot 1011 is given by the formula [|xy| / 4k]*U dc It can be calculated as U / 1.732. dc is the bus voltage. x and y are the numbers of two adjacent common-phase conductors 1021, respectively.

[0138] The maximum voltage drop of the common-mode conductor 1021 in the same winding slot in the embodiment of this application is 0.27U. dc It is.

[0139] Compared with the full-length and short-length winding stators in the related art, the common-phase and different-phase voltage drops in the slots in the embodiments of the present application are both greatly reduced, which is favorable for the insulation design in the winding slots and improves the insulation reliability.

[0140] As can be seen from the above, the U-phase winding shown in FIG. 10 can balance the potentials of each branch slot, reduce the circulation loss between the branches, reduce the imbalance of the branch electromotive forces caused by the rotor eccentricity, reduce the voltage stress of the in-slot conductor 1021, and is advantageous for the arrangement of the busbars and the implementation of the winding processing process.

[0141] 11 is a schematic diagram of a three-phase winding of a stator according to some embodiments of the present application, showing a U-phase winding, a V-phase winding and a W-phase winding of the stator winding.

[0142] Exemplarily, as shown in FIG. 11, the U-phase winding includes a first branch U1 and a second branch U2, where U1+ represents the first positive lead of the first branch U1, U1- represents the first negative lead of the first branch U1, U2+ represents the second positive lead of the second branch U2, and U2- represents the second negative lead of the second branch U2.

[0143] The V-phase winding includes a first branch V1 and a second branch V2, where V1+ represents the first positive lead of the first branch V1, V1- represents the first negative lead of the first branch V1, V2+ represents the second positive lead of the second branch V2, and V2- represents the second negative lead of the second branch V2.

[0144] The W-phase winding includes a first branch W1 and a second branch W2, where W1+ represents the first positive lead of the first branch W1, W1- represents the first negative lead of the first branch W1, W2+ represents the second positive lead of the second branch W2, and W2- represents the second negative lead of the second branch W2.

[0145] In some embodiments, twelve conductors associated with leads U1+, U1-, U2+, U2-, V1+, V1-, V2+, V2-, W1+, W1-, W2+, W2- are placed in the nine winding slots.

[0146] In some embodiments, the six conductors connected to the leads U1+, U1-, W1+, W1-, V1+, and V1- are all conductors of layer A. The leads are all close to the radially outer ends of the stator core, making welding easy.

[0147] 12, in some embodiments, the stator winding 102 includes three phase windings: a U-phase winding, a V-phase winding, and a W-phase winding. Illustratively, the three phase windings are delta-connected.

[0148] 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.

[0149] 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. Illustratively, the three phase windings are star-connected.

[0150] 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.

[0151] FIG. 14 is a connection schematic diagram of a phase winding of a stator winding of a stator according to some further embodiments of the present application.

[0152] 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. Illustratively, the three phase windings are delta connected.

[0153] 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.

[0154] FIG. 15 is a connection schematic diagram of a phase winding of a stator winding of a stator according to further some embodiments of the present application.

[0155] 15, in some embodiments, the stator winding includes three phase windings, namely, a U-phase winding, a V-phase winding, and a W-phase winding. Illustratively, the three phase windings are star-connected.

[0156] 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.

[0157] Referring to the different stator windings shown in Figures 12 to 15, by changing the connection method of the phase windings and the connection method of the phase winding branches, the number of series connected turns of the stator windings can be adjusted, thereby adapting to different voltage and power level applications.

[0158] An embodiment of the present application further provides a motor, which includes the stator according to any one of the above embodiments. Illustratively, the motor further includes a rotor, and the rotor is disposed in a space surrounded by an inner wall of the stator core.

[0159] The motor in the embodiments of the present application may be a generator or an electric motor.

[0160] An embodiment of the present application further provides a power consuming device, which includes a motor according to any one of the preceding embodiments.

[0161] In some embodiments, the power consumption device includes a power train, the power train including a reducer and the above-mentioned motor. The motor is connected to the reducer in a transmission manner. Specifically, a drive shaft of the motor and an input shaft of the reducer are connected to each other through a transmission member such as a coupling, so that a driving force can be output from the motor to the reducer.

[0162] An embodiment of the present application further provides a vehicle, comprising the above-mentioned powertrain, the above-mentioned powertrain being installed in the vehicle to provide the vehicle with driving power. Specifically, in this embodiment, the vehicle may be specifically a new energy vehicle driven by electric energy, for example, the new energy vehicle may be specifically a hybrid electric vehicle, a pure electric vehicle, or a fuel cell electric vehicle, etc., and may be a vehicle that adopts a high-efficiency energy storage device such as a supercapacitor, a flywheel battery, or a flywheel energy storage device as an electric energy source.

[0163] It should be mentioned that, unless there is a conflict, the embodiments and features in the embodiments in the present application can be combined with each other.

[0164] Finally, it should be noted that the above examples are only for illustrating 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 examples, those skilled in the art may still modify the technical solutions described in the above examples or replace some of the technical features therein with equivalents, but it should be understood that such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A stator for a motor, comprising: a stator core; and a stator winding disposed on the stator core, the stator core having a plurality of winding slots formed in an inner wall thereof, the stator winding including conductors inserted into the plurality of winding slots; The conductors in each of the winding slots are set in n layers, where n is a positive even number, and the n layers of the conductors are arranged in a L shape along a direction from the bottom of the winding slot toward the opening of the winding slot. １ Layer, L ２ Layer, ... and L ｎ Layers: The stator winding includes a plurality of phase windings, each of the phase windings includes a plurality of pole phase groups, each of the pole phase groups of the phase windings includes a first region, a second region, and a third region, the second region and the third region are located on both sides of the first region, respectively, and the conductor located in the first region is L. １ Layer ~L ｎ layer, and the conductor located in the second region is L ｎ／２＋１ Layer ~L ｎ layer, and the conductor located in the third region is L １ Layer ~L ｎ／２ layer, Each of the phase windings includes a first branch and a second branch, the first branch includes 4k conductors connected in series in sequence, k is a positive integer, and the 4k conductors of the first branch are designated as A １ , ……, A ２ｋ … and A ４ｋ The second branch includes 4k conductors connected in series in sequence, and the 4k conductors of the second branch are designated as B １ , ……, B ２ｋ … and B ４ｋ year, The above A １ ~ A ２ｋ , the B １ ~ B ２ｋ is distributed in the first region, and A ２ｋ＋１ ~ A ４ｋ A part of the A is distributed in the second region, ２ｋ＋１ ~ A ４ｋ The remaining portion of B is distributed in the third region. ２ｋ＋１ ~ B ４ｋ A part of the B ２ｋ＋１ ~ B ４ｋ the remaining portion of the stator of the motor being distributed in the third region.

2. The above A ２ｋ＋１ ~ A ３ｋ is distributed in the second region, and A ３ｋ＋１ ~ A ４ｋ is distributed in the third region, and B ２ｋ＋１ ~ B ３ｋ is distributed in the third region, and B ３ｋ＋１ ~ B ４ｋ The stator of claim 1 , wherein:

3. The above A １ and B １ The stator according to claim 1 or 2, wherein:

4. The above A １ is the L in the winding slot １ the conductor of the layer, １ is the L in the winding slot ｎ 4. The stator of claim 3, wherein the conductors are layers.

5. The above A ４ｋ is the L in the winding slot ｎ the conductor of the layer, ４ｋ is the L in the winding slot ｎ 5. The stator of claim 4, wherein the conductors are layers.

6. The first branch is １ A first positive lead wire connected to the A ４Ｋ and a first negative lead connected to the The second branch is the B １ A second positive lead wire connected to the B ４Ｋ and a second negative lead wire connected to said first negative lead wire.

7. 7. The stator of claim 1, wherein the first branch includes a first single conductor connector and a plurality of first dual conductor connectors, the first single conductor connector including one of the conductors and each of the first dual conductor connectors including two of the conductors.

8. The first single conductor connector is two, and one of the first single conductor connectors is １ and another of the first single conductor connectors includes the A ４ｋ The stator of claim 7 , comprising:

9. the first plurality of dual conductor connectors include a first connector, a second connector, and a third connector; 9. The stator of claim 7 or 8, wherein a span of the two conductors of the first connector is equal to the pole distance, a span of the two conductors of the second connector is smaller than the pole distance, and a span of the two conductors of the third connector is larger than the pole distance.

10. The above A ２ｋ and the above A ２ｋ＋１ are the two conductors of the third connector, The above A ３ｋ and the above A ３ｋ＋１ 10. The stator of claim 9, wherein: are two of the conductors of the second connector.

11. the second branch includes a second single conductor connector and a plurality of second dual conductor connectors, each of the second single conductor connectors including one of the conductors and each of the second dual conductor connectors including two of the conductors; The second single conductor connector is two, and one of the second single conductor connectors is １ and another of the first single conductor connectors includes the B ４ｋ Including, the second plurality of dual conductor connectors include a fourth connector, a fifth connector, and a sixth connector; 7. A stator as claimed in claim 1, wherein the span of the two conductors of the fourth connector is equal to the pole distance, the span of the two conductors of the sixth connector is smaller than that of the fifth connector, and the span of the two conductors of the fifth connector is smaller than the pole distance.

12. B ２ｋ and B ２ｋ＋１ are the two conductors of the fifth connector, B ３ｋ and B ３ｋ＋１ 12. The stator of claim 11, wherein: are two of the conductors of the sixth connector.

13. 13. The stator according to claim 1, wherein the stator winding includes three of the phase windings, and the three phase windings adopt a star connection or a delta connection.

14. 14. A stator as claimed in any preceding claim, wherein the winding slots are in multiples of twelve.

15. 15. The stator of claim 1, wherein the number of winding slots is 48, the n is 8, and the number of stator poles is 8.

16. A motor comprising a stator according to any one of claims 1 to 15.

17. 17. An electrical power consuming device comprising the motor of claim 16.

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