Stator winding, stator and motor

Abstract

The utility model provides a stator winding, a stator and a motor, each phase winding comprises a plurality of conductor groups, and the plurality of conductor groups which are located in the same magnetic pole and are sequentially arranged along the radial direction of a stator iron core are sequentially and adjacently arranged along the same circumferential direction of the stator iron core; a plurality of first connecting structures and a plurality of second connecting structures are alternately arranged in sequence along the radial direction of the stator iron core in the welding end of each phase of winding, in a magnetic pole where the lead end and the wire outlet end of each branch are located and in another magnetic pole adjacent to the magnetic pole; the interiors of the two grooves of the first connecting structure and the interiors of the two grooves of the second connecting structure are arranged in the other magnetic pole which is adjacent to the magnetic pole where the lead end and the wire outlet end of each branch are located in two adjacent layers, the inclination directions of the two adjacent layers are opposite, and a third connecting structure is arranged on the radial innermost layer or the radial outermost layer of the stator iron core. The short-distance structure arrangement of the conductor in the groove is relatively more uniform, and the problems of NVH and noise are better solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field especially, it is a kind of stator winding, stator and motor. BACKGROUND

[0002] The conductor in slot of the stator of the flat wire motor of current q=3, 2 branch parallel is mostly whole distance structure, or the structure is short distance of cross structure, or the structure is short distance of separation structure, in solving NVH and noise, the effect is not very obvious. SUMMARY

[0003] In view of above problem, the utility model provides a kind of stator winding, stator and motor to solve the above or other former problems existing in prior art.

[0004] To solve the above technical problem, the technical scheme adopted by the utility model is: a kind of stator winding, including multiphase winding, each phase winding includes multiple conductor groups, multiple conductor groups are arranged along the radial direction and the circumferential direction of stator core, multiple conductor groups sequentially arranged along the radial direction of stator core in the same magnetic pole are sequentially arranged along the same circumferential direction of stator core in adjacent;

[0005] Each phase winding includes at least two parallelly connected branch winding, in the welding end of each phase winding, the pole in the lead end and outgoing line end of each branch and another pole adjacent to the pole, along the radial direction of stator core, multiple first connecting structures and multiple second connecting structures are sequentially arranged in alternation, the two slot interiors of first connecting structure and the two slot interiors of second connecting structure are respectively arranged in adjacent two layers, the inclination direction of first connecting structure and second connecting structure along the radial direction of stator core is opposite, in the pole adjacent to the pole where the lead end and outgoing line end of each branch are located, third connecting structure is arranged in the radial innermost layer or radial outermost layer of stator core;

[0006] Third connecting structure and the lead end and outgoing line end of each parallel branch are not arranged in the same layer, and third connecting structure includes at least two welding end structures.

[0007] Further, in addition to the pole where the lead end and outgoing line end of each branch are located and another pole adjacent to the pole, multiple first connecting structures are sequentially arranged along the radial direction of stator core in the remaining poles.

[0008] Further, the first connecting structure includes at least one first welding end structure, and multiple first welding end structures are arranged adjacent along the circumferential direction of stator core;Second connecting structure includes at least two second welding end structures arranged adjacent along the circumferential direction of stator core, and the pitch of first welding end structure is different from the pitch of second welding end structure.

[0009] Further, the plurality of welding end structures of the third connecting structure are arranged adjacent along a circumferential direction of the stator core, and a pitch of the welding end structure of the third connecting structure is different from a pitch of the first welding end structure.

[0010] Further, the conductor groups are arranged adjacent along a radial direction of the stator core, and the conductor group comprises a first conductor, a second conductor and a third conductor arranged adjacent along a circumferential direction of the stator core in sequence, the first conductor is arranged outside the second conductor, and the second conductor is arranged outside the third conductor.

[0011] Further, the number of layers of the stator core in the radial direction is an even number greater than or equal to 6.

[0012] Further, along the radial direction of the stator core, any two adjacent conductor groups are arranged staggered along the circumferential direction of the stator core by one slot.

[0013] A stator, comprising the stator winding as described above.

[0014] A motor, comprising the stator as described above.

[0015] By adopting the technical scheme, the stator winding is composed of the same conductor group, the conductor group is arranged adjacent along a radial direction of the stator core, the conductor group comprises at least three conductors, the plurality of conductors are arranged concentrically, and along the radial direction of the stator core, the plurality of conductor groups arranged in sequence in the same magnetic pole at the lead-in end of each phase winding are arranged in a ladder shape, the plurality of conductor groups are arranged adjacent along the same circumferential direction of the stator core, so that the short-distance conductor arrangement in the slot of the stator core is uniform; along the radial direction of the stator core, the plurality of first connecting structures and the plurality of second connecting structures are arranged in each magnetic pole where the lead-in end and the lead-out end of each parallel branch are located and the magnetic pole adjacent to the magnetic pole, the first connecting structure and the second connecting structure are arranged adjacent along the radial direction of the stator core, the first connecting structure and the second connecting structure are arranged alternately along the radial direction of the stator core, the inclination directions of the first connecting structure and the second connecting structure along the radial direction of the stator core are opposite, and meanwhile, the third connecting structure is arranged in the magnetic pole adjacent to the magnetic pole where the lead-in end and the lead-out end of each parallel branch are located, the third connecting structure is arranged in the same layer, the third connecting structure and the lead-in end and the lead-out end of each parallel branch are not arranged in the same layer, a plurality of first connecting structures are arranged in the remaining magnetic poles along the radial direction of the stator core, so that the short-distance conductor arrangement in the slot is relatively more uniform, arranged in a ladder shape, and the problems of NVH and noise are better solved, and the motor noise is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a planar development structure schematic view of the lead-in end (crown end) of the embodiment one of the utility model;

[0017] Figure 2 is a plane expansion structure schematic diagram of the welding end of the embodiment one of the utility model;

[0018] Figure 3 is a plane expansion structure schematic diagram of the plug-in end (crown end) of the embodiment two of the utility model;

[0019] Figure 4 is a plane expansion structure schematic diagram of the welding end of the embodiment two of the utility model;

[0020] Figure 5 is a plane expansion structure schematic diagram of the plug-in end (crown end) of the embodiment three of the utility model;

[0021] Figure 6 is a plane expansion structure schematic diagram of the welding end of the embodiment three of the utility model;

[0022] Figure 7 is a plane expansion structure schematic diagram of the plug-in end (crown end) of the embodiment four of the utility model;

[0023] Figure 8 is a plane expansion structure schematic diagram of the welding end of the embodiment four of the utility model.

[0024] In the drawings:

[0025] 10, conductor group 20, first welding end structure 30, second welding end structure

[0026] 40, third welding end structure 100, first conductor 101, second conductor

[0027] 102, third conductor DETAILED DESCRIPTION

[0028] The utility model will be further explained in connection with the drawings and specific embodiments.

[0029] Figure 1 The structure schematic diagram of the embodiment of the utility model is shown, and the embodiment relates to a kind of stator winding, stator and motor, in any phase winding of the stator winding, multiple conductor groups are sequentially arranged along the circumferential direction and radial direction of stator core, and in the same magnetic pole, multiple conductor groups are arranged in steps along the radial direction of stator core, so that the short distance conductor arrangement in the slot of stator core is more uniform, better solve the NVH and noise problem of motor, noise reduction.

[0030] A kind of stator winding, such as Figures 1-8As shown, the stator winding includes a plurality of multi-phase windings, each of the plurality of multi-phase windings is arranged in a corresponding slot of the stator core, and each phase winding is sequentially arranged by a plurality of hairpin coils along the circumferential and radial directions of the stator core according to a certain arrangement rule. In some embodiments, the plurality of multi-phase windings is a three-phase winding, and each phase winding has the same structure, except that the slots of the stator core are different. Hereinafter, the structure of the stator winding will be described by taking any one phase winding as an example.

[0031] Each phase winding includes a plurality of conductor groups 10, which are arranged along the radial and circumferential directions of the stator core, i.e., each phase winding is sequentially arranged by the same conductor group 10 according to a certain arrangement rule. The number of conductor groups 10 is multiple. When arranging the plurality of conductor groups 10, according to the position of the slot of the stator core occupied by the phase winding, a plurality of conductor groups 10 are arranged along the circumferential direction of the stator core to form a coil unit, and a plurality of conductor groups 10 are sequentially arranged along the radial direction of the stator core, i.e., a plurality of coil units are sequentially arranged along the radial direction of the stator core to form a phase winding structure.

[0032] Among them, a plurality of conductor groups 10 sequentially arranged along the radial direction of the stator core in the same magnetic pole are arranged adjacent to each other along the same circumferential direction of the stator core, i.e., in each phase winding, a plurality of conductor groups 10 are sequentially arranged along the radial direction from the innermost layer to the outermost layer or from the outermost layer to the innermost layer in each magnetic pole. When arranging these conductor groups 10, they are arranged along the same circumferential direction (01 slot to 54 slot direction or 54 slot to 01 slot direction) of the stator core, and two adjacent conductor groups 10 are arranged in adjacent slots, i.e., the first conductor group 10 and the second conductor group 10 are arranged in adjacent slots, the first conductor group 10 and the second conductor group 10 are staggered in the circumferential direction, the second conductor group 10 and the third conductor group 10 are arranged in adjacent slots, the second conductor group 10 and the third conductor group 10 are staggered in the circumferential direction, and so on until the last two conductor groups 10, the last two conductor groups 10 are arranged in adjacent slots, and the last two conductor groups 10 are staggered in the circumferential direction. That is, along the radial direction of the stator core, any two adjacent conductor groups 10 are arranged in adjacent slots along the circumferential direction of the stator core, not in the same slot. The plurality of conductor groups 10 are arranged in steps in the radial direction of the stator core, so that the conductor arrangement in the slots of the stator core is uniform.

[0033] The conductor group 10 is arranged in the radial direction of the stator core, and the two groups of slot inner portions of the conductor group 10 are arranged in the two groups of slots of the stator core, respectively, and the two groups of slot inner portions are located in the radially adjacent two layers, that is, the conductor group 10 is arranged in the radial direction of the stator core, for example, one group of slot inner portions of the conductor group 10 is located in the first layer of one group of slots, and the other group of slot inner portions of the conductor group 10 is located in the second layer of the other group of slots.

[0034] The conductor group 10 includes a plurality of conductors, the plurality of conductors are arranged adjacent in the circumferential direction of the stator core, the plurality of conductors are arranged concentrically, and the plurality of conductors are arranged in sequence in the radial direction of the stator core. In some embodiments, the conductor group 10 includes a first conductor 100, a second conductor 101, and a third conductor 102 arranged adjacent in sequence in the circumferential direction of the stator core. One group of slot inner portions of the first conductor 100, the second conductor 101, and the third conductor 102 is arranged in three adjacent slots, and the other group of slot inner portions of the first conductor 100, the second conductor 101, and the third conductor 102 is arranged in another three adjacent slots. In the radial direction of the stator core, the first conductor 100, the second conductor 101, and the third conductor 102 are arranged in sequence, that is, the first conductor 100 is arranged outside the second conductor 101, the second conductor 101 is arranged outside the third conductor 102, and the pitch of the first conductor 100, the pitch of the second conductor 101, and the pitch of the third conductor 102 are selected according to actual needs.

[0035] In some embodiments, the pitch of the first conductor 100 is preferably 11.

[0036] In some embodiments, the pitch of the second conductor 101 is preferably 9.

[0037] In some embodiments, the pitch of the third conductor 102 is preferably 7.

[0038] Each phase winding includes at least two parallelly connected branch windings, and the lead end and the outgoing end of each branch winding are arranged in the same layer. In some embodiments, the lead end and the outgoing end of each branch winding are arranged in the radially innermost layer or the radially outermost layer of the stator core, and the layer in which the lead end and the outgoing end of each branch winding are arranged can be selected according to actual needs.

[0039] The number of parallel branches in each phase winding can be selected according to actual needs, and no specific requirements are made here. In some embodiments, the number of parallel branches in each phase winding is preferably two.

[0040] In some embodiments, the lead end and the outgoing end of each parallel branch in each phase winding are located in the same magnetic pole.

[0041] At the insertion end of each phase winding, along the same radial direction of the stator core, the turning points of multiple conductor groups 10 are staggered from each other. The straight line where the turning point of each conductor group 10 is located intersects the diameter of the stator core. That is, along the same circumferential direction of the stator core (along the direction from slot 01 to slot 54 or along the direction from slot 54 to slot 01), the turning points of two adjacent conductor groups 10 are staggered from each other. The conductor groups 10 are arranged sequentially along the radial direction from the innermost layer to the outermost layer of the stator core. The turning point of the first conductor group 10 is staggered by one slot relative to the turning point of the second conductor group 10, the turning point of the third conductor group 10 is staggered by one slot relative to the turning point of the second conductor group 10, the turning point of the fourth conductor group 10 is staggered by one slot relative to the turning point of the third conductor group 10, and so on, until the last conductor group 10.

[0042] At the welding end of each phase winding, according to the design requirements of the stator winding, the corresponding two welding ends are welded together to form a welding end structure. The corresponding welding ends in a parallel branch are connected to form a parallel branch structure. The welding ends of two unconnected conductors are respectively connected to the lead conductors, which serve as the lead end and the output end of a parallel branch, respectively.

[0043] The first connection structure and the second connection structure are alternately arranged in sequence along the radial direction of the stator core.

[0044] The first connection structure and the second connection structure are alternately arranged in sequence along the radial direction of the stator core.

[0045] The first connection structure and the second connection structure are alternately arranged in sequence along the radial direction of the stator core.

[0046] The third connection structure is arranged so that the welding ends of the plurality of conductors in each branch are connected in a reverse direction after the third connection structure, for example, the welding ends of the plurality of conductors are connected in a clockwise direction before the third connection structure, and the welding ends of the plurality of conductors are connected in a counterclockwise direction after the third connection structure.

[0047] The third connecting structure comprises at least two welding end structures, the number of the welding end structures 40 of the third connecting structure is consistent with the number of the parallel branches, the number of the welding end structures 40 of the third connecting structure is selected according to the number of the parallel branches, and one welding end structure 40 of the third connecting structure is arranged in each parallel branch. The plurality of welding end structures 40 of the third connecting structure are arranged adjacent along the circumferential direction of the stator core, one group of corresponding slot interiors of the plurality of welding end structures 40 of the third connecting structure are arranged in one group of corresponding adjacent slots, and another group of corresponding slot interiors of the plurality of welding end structures 40 of the third connecting structure are arranged in another group of corresponding adjacent slots.

[0048] The welding end structure 40 in the third connecting structure is formed by connecting one welding end of one conductor with another welding end of another conductor, and the extension lengths of the welding ends of the two conductors along the circumferential direction of the stator core can be the same or different, which is selected according to actual needs, and no specific requirement is made herein.

[0049] In some implementable embodiments, the pitch length of the welding end structure 40 of the third connecting structure is 8.

[0050] The first connecting structure comprises at least one first welding end structure 20, and a plurality of first welding end structures 20 are arranged adjacent along the circumferential direction of the stator core, that is, one group of corresponding slot interiors of the plurality of first welding end structures 20 are arranged in one group of corresponding adjacent slots, and another group of corresponding slot interiors of the plurality of first welding end structures 20 are arranged in another group of corresponding adjacent slots, and the number of the first welding end structures 20 is selected according to actual needs, and no specific requirement is made herein.

[0051] In some implementable embodiments, the pitch of the first welding end structure 20 is 9.

[0052] The second connecting structure comprises at least two second welding end structures 30 arranged adjacent along the circumferential direction of the stator core, that is, one group of corresponding slot interiors of the plurality of second welding end structures 30 are arranged in one group of corresponding adjacent slots, and another group of corresponding slot interiors of the plurality of second welding end structures 30 are arranged in another group of corresponding adjacent slots, and the number of the second welding end structures 30 is selected according to actual needs, and no specific requirement is made herein.

[0053] In some implementable embodiments, the pitch of the first welding end structure 20 is different from the pitch of the second welding end structure 30, and the pitch of the second welding end structure 30 is 8 or 10.

[0054] In some implementable embodiments, the pitch of the welding end structure 40 of the third connecting structure is different from the pitch of the first welding end structure 20.

[0055] In some embodiments, the pitch of the welding end structure 40 of the third connecting structure can be the same as or different from the pitch of the second welding section structure 30, which can be selected according to actual needs.

[0056] The lead end and the outgoing end of any parallel branch are not located in the same layer as the third connecting structure, and in some embodiments, the lead end and the outgoing end of any parallel branch are located in the radially outermost layer and the radially innermost layer of the stator core, respectively.

[0057] In addition to the poles where the lead end and the outgoing end of each branch are located and the other pole adjacent to the pole, a plurality of first connecting structures are sequentially arranged along the radial direction of the stator core in the remaining poles. In this structure, the first connecting structure includes at least three first welding end structures 20, and in the same pole, a plurality of first connecting structures are sequentially arranged adjacent to each other along the same circumferential direction of the stator core, i.e., along the same circumferential direction of the stator core (such as the direction from slot 01 to slot 54 or the direction from slot 54 to slot 01), the first first connecting structure and the second first connecting structure are arranged in adjacent slots, the second first connecting structure and the third first connecting structure are arranged in adjacent slots, the fourth first connecting structure and the third first connecting structure are arranged in adjacent slots, and so on, until the last first connecting structure. Along the radial direction of the stator core, the plurality of first connecting structures are arranged in a stepped manner.

[0058] The adjacent two layers are set as a layer group, and along the radial direction of the stator core, a plurality of layer groups are provided. In any parallel branch, along the radial first direction of the stator core, the lead end of the parallel branch is sequentially connected with the plurality of conductors in the first layer group along the first circumferential direction of the stator core, then enters the second layer group, is sequentially connected with the plurality of conductors in the second layer group along the first circumferential direction of the stator core, then enters the third layer group, is sequentially connected with the plurality of conductors in the third layer group along the first circumferential direction of the stator core, and so on, until the plurality of conductors in the last layer group are connected, and one welding end of a welding end structure 40 of a third connecting structure in the last layer group is connected, another welding end of the welding end structure 40 of the third connecting structure is sequentially connected with the other conductors in the layer group along the second circumferential direction of the stator core, and after at least two circumferential connections in the layer group, along the radial second direction of the stator core, enters the adjacent layer group, is sequentially connected with the plurality of conductors in the layer group along the second circumferential direction of the stator core, and after at least two circumferential connections in the layer group, enters the adjacent layer group, is sequentially connected with the plurality of conductors in the layer group along the second circumferential direction of the stator core, and after at least two circumferential connections in the layer group, enters the adjacent layer group, is sequentially connected with the plurality of conductors in the layer group along the second circumferential direction of the stator core, and after at least two circumferential connections in the layer group, sequentially connects the plurality of conductors in the last layer group along the second circumferential direction of the stator core, and after at least two circumferential connections in the layer group, the unconnected welding end of the last conductor is the outgoing end of the parallel branch, and the connection of one parallel branch is completed.

[0059] The radial first direction of the stator core and the radial second direction of the stator core are opposite, one is along the radial innermost layer to the radial outermost layer direction, and the other is along the radial outermost layer to the radial innermost layer direction.

[0060] The first circumferential direction of the stator core and the second circumferential direction of the stator core are opposite, one is along the 01 slot to the 54 slot direction, and the other is along the 54 slot to the 01 slot direction.

[0061] The radial number of layers of the stator core is an even number greater than or equal to 6, and the radial number of layers of the stator core is selected according to actual needs, and no specific requirements are made here.

[0062] A stator includes the stator winding as described above.

[0063] A motor includes the stator as described above.

[0064] Some embodiments will be described in detail below.

[0065] Embodiment one

[0066] As Figure 1 and 2 shown, a stator winding is mounted on a stator core, the stator core has a plurality of slots formed on the radial inner surface of the stator core and spaced apart along the circumferential direction of the stator core at a predetermined slot pitch, in this embodiment, the stator winding is a three-phase winding, the hairpin coils in each phase stator winding are connected in parallel along two branches in the circumferential direction of the stator core, the two parallel branches are U1 and U2, the number of slots of the stator core is 54, the stator has 6 magnetic poles, and the radial layer number of the stator core is 6 layers.

[0067] Each phase winding is composed of 18 conductor groups 10, which are arranged in sequence along the circumferential direction of the stator core and in sequence along the radial direction of the stator core, forming a phase winding structure, the conductor groups 10 are arranged in two adjacent layers along the radial direction of the stator core, in the first layer and the second layer, there are 6 conductor groups 10 arranged in sequence along the circumferential direction of the stator core, in the third layer and the fourth layer, there are 6 conductor groups 10 arranged in sequence along the circumferential direction of the stator core, and the 6 conductor groups 10 in the third layer and the fourth layer are each shifted one slot along the circumferential direction of the stator core (01 slot to 54 slot direction) relative to the 6 conductor groups 10 in the first layer and the second layer, in the fifth layer and the sixth layer, there are 6 conductor groups 10 arranged in sequence along the circumferential direction of the stator core, and the 6 conductor groups 10 in the fifth layer and the sixth layer are each shifted one slot along the circumferential direction of the stator core relative to the 6 conductor groups 10 in the third layer and the fourth layer, so that the plurality of conductor groups 10 arranged along the radial direction of the stator core within one magnetic pole are arranged in steps.

[0068] The conductor group 10 includes a first conductor 100, a second conductor 101, and a third conductor 102, the first conductor 100 is arranged outside the second conductor 101, the second conductor 101 is arranged outside the third conductor 102, the first conductor 100, the second conductor 101, and the third conductor 102 are arranged concentrically, the pitch of the first conductor 100 is 11, the pitch of the second conductor 101 is 9, and the pitch of the third conductor 102 is 7.

[0069] Specifically, at the plug-in end of one phase winding, in the first layer and the second layer, the first conductor group 10 is located in the first layer 10th groove, 11th groove, 12th groove and the second layer 01th groove, 02th groove, 03th groove, the second conductor group 10 is located in the first layer 19th groove, 20th groove, 21th groove and the second layer 10th groove, 11th groove, 12th groove, the third conductor group 10 is located in the first layer 28th groove, 29th groove, 30th groove and the second layer 19th groove, 20th groove, 21th groove, the fourth conductor group 10 is located in the first layer 37th groove, 38th groove, 39th groove and the second layer 28th groove, 29th groove, 30th groove, the fifth conductor group 10 is located in the first layer 46th groove, 47th groove, 48th groove and the second layer 37th groove, 38th groove, 39th groove, the sixth conductor group 10 is located in the first layer 01th groove, 02th groove, 03th groove and the second layer 46th groove, 47th groove, 48th groove;

[0070] In the third layer and the fourth layer, the first conductor group 10 is located in the third layer 11th groove, 12th groove, 13th groove and the fourth layer 02th groove, 03th groove, 04th groove, the second conductor group 10 is located in the third layer 20th groove, 21th groove, 22th groove and the fourth layer 11th groove, 12th groove, 13th groove, the third conductor group 10 is located in the third layer 29th groove, 30th groove, 31th groove and the fourth layer 20th groove, 21th groove, 22th groove, the fourth conductor group 10 is located in the third layer 38th groove, 39th groove, 40th groove and the fourth layer 29th groove, 30th groove, 31th groove, the fifth conductor group 10 is located in the third layer 47th groove, 48th groove, 49th groove and the fourth layer 38th groove, 39th groove, 40th groove, the sixth conductor group 10 is located in the third layer 02th groove, 03th groove, 04th groove and the fourth layer 47th groove, 48th groove, 49th groove;

[0071] In the fifth layer and the sixth layer, the first conductor group 10 is located in the fifth layer 12th groove, 13th groove, 14th groove and the sixth layer 03th groove, 04th groove, 05th groove, the second conductor group 10 is located in the fifth layer 21th groove, 22th groove, 23th groove and the sixth layer 12th groove, 13th groove, 14th groove, the third conductor group 10 is located in the fifth layer 30th groove, 31th groove, 32th groove and the sixth layer 21th groove, 22th groove, 23th groove, the fourth conductor group 10 is located in the fifth layer 39th groove, 40th groove, 41th groove and the sixth layer 30th groove, 31th groove, 32th groove, the fifth conductor group 10 is located in the fifth layer 48th groove, 49th groove, 50th groove and the sixth layer 39th groove, 40th groove, 41th groove, the sixth conductor group 10 is located in the fifth layer 03th groove, 04th groove, 05th groove and the sixth layer 48th groove, 49th groove, 50th groove.

[0072] In the welding end of one phase winding, in the magnetic pole where the lead end and the outgoing end of two parallel branches are located, along the direction from the innermost layer to the outermost layer of the stator core in the radial direction, the number of first connection structures is three, each first connection structure includes one first welding end structure 20, the two slot inner parts of the first first connection structure are located in the first layer 19 slot and the second layer 28 slot respectively, the two slot inner parts of the second first connection structure are located in the first layer 20 slot and the second layer 29 slot respectively, and the two slot inner parts of the third first connection structure are located in the first layer 21 slot and the second layer 30 slot respectively; the number of second connection structures is two, each second connection structure includes two second welding end structures 30, the two groups of slot inner parts of the first second connection structure are located in the third layer 21 slot 22 slot and the second layer 29 slot 30 slot respectively, and the two groups of slot inner parts of the second second connection structure are located in the fifth layer 22 slot 23 slot and the fourth layer 30 slot 31 slot respectively; the lead end of the first branch winding U1 is located in the first layer 28 slot, and the outgoing end is located in the first layer 20 slot; the lead end of the second branch winding U2 is located in the first layer 29 slot, and the outgoing end is located in the first layer 21 slot;

[0073] In the other magnetic pole adjacent to the magnetic pole where the lead end and the outgoing end of two parallel branches are located, along the direction from the innermost layer to the outermost layer of the stator core in the radial direction, the number of first connection structures is three, each first connection structure includes one first welding end structure 20, the two slot inner parts of the first first connection structure are located in the first layer 30 slot and the second layer 39 slot respectively, the two slot inner parts of the second first connection structure are located in the first layer 31 slot and the second layer 40 slot respectively, and the two slot inner parts of the third first connection structure are located in the first layer 32 slot and the second layer 41 slot respectively; the number of second connection structures is two, each second connection structure includes two second welding end structures 30, the two groups of slot inner parts of the first second connection structure are located in the third layer 29 slot 30 slot and the second layer 37 slot 38 slot respectively, and the two groups of slot inner parts of the second second connection structure are located in the fifth layer 30 slot 31 slot and the fourth layer 38 slot 39 slot respectively; the number of third connection structures is one, the third connection structure includes two welding end structures 40, and the two groups of slot inner parts of the third connection structure are located in the sixth layer 31 slot 32 slot and the sixth layer 39 slot 40 slot respectively;

[0074] In the remaining magnetic poles, along the radial direction of the stator core from the innermost layer to the outermost layer, three first connection structures are arranged in each magnetic pole, each first connection structure includes three first welding end structures 20, the three first welding end structures 20 are arranged adjacent along the circumferential direction of the stator core, and along the radial direction of the stator core, the three first connection structures are arranged in steps, and the three first connection structures are sequentially shifted by one slot to the right, for example, in the first magnetic pole, the two groups of slot inner parts of the first first connection structure are respectively arranged in the first layer 01 slot 02 slot 03 slot and the second layer 10 slot 11 slot 12 slot, the two groups of slot inner parts of the second first connection structure are respectively arranged in the third layer 02 slot 03 slot 04 slot and the fourth layer 11 slot 12 slot 13 slot, and the two groups of slot inner parts of the third first connection structure are respectively arranged in the fifth layer 03 slot 04 slot 05 slot and the sixth layer 12 slot 13 slot 14 slot. The pitch of the first welding end structure 20 is 9.

[0075] The first parallel branch U1, the outgoing end (lead end) of the U1 branch enters from the 01 layer 20 slot, sequentially passes through the 02 layer 11 slot, the 01 layer 02 slot, the 02 layer 47 slot, the 01 layer 38 slot, the 02 layer 29 slot, the 03 layer 21 slot, the 04 layer 12 slot, the 03 layer 03 slot, the 04 layer 48 slot, the 03 layer 39 slot, the 04 layer 30 slot, the 05 layer 22 slot, the 06 layer 13 slot, the 05 layer 04 slot, the 06 layer 49 slot, the 05 layer 40 slot, the 06 layer 31 slot, and then sequentially connects with the 06 layer 39 slot in the same layer direction, and then sequentially passes through the 05 layer 50 slot, the 06 layer 05 slot, the 05 layer 12 slot, the 06 layer 21 slot, the 05 layer 32 slot, the 06 layer 41 slot, the 05 layer 48 slot, the 06 layer 03 slot, the 05 layer 14 slot, the 06 layer 23 slot, the 05 layer 30 slot, the 04 layer 38 slot, the 03 layer 49 slot, the 04 layer 04 slot, the 03 layer 11 slot, the 04 layer 20 slot, the 03 layer 31 slot, the 04 layer 40 slot, the 03 layer 47 slot, the 04 layer 02 slot, the 03 layer 13 slot, the 04 layer 22 slot, the 03 layer 29 slot, the 02 layer 37 slot, the 01 layer 48 slot, the 02 layer 03 slot, the 01 layer 10 slot, the 02 layer 19 slot, the 01 layer 30 slot, the 02 layer 39 slot, the 01 layer 46 slot, the 02 layer 01 slot, the 01 layer 12 slot, the 02 layer 21 slot, and is connected from the 01 layer 28 slot U1 phase lead end (outgoing end) to form the first parallel branch U1 structure.

[0076] The second parallel branch U2, the U2 phase outgoing terminal (lead terminal) enters from the 01 layer 21 slot, sequentially passes through the 02 layer 10 slot, the 01 layer 01 slot, the 02 layer 48 slot, the 01 layer 39 slot, the 02 layer 28 slot, the 01 layer 19 slot, the 02 layer 12 slot, the 01 layer 03 slot, the 02 layer 46 slot, the 01 layer 37 slot, the 02 layer 30 slot, the 03 layer 22 slot, the 04 layer 11 slot, the 03 layer 02 slot, the 04 layer 49 slot, the 03 layer 40 slot, the 04 layer 29 slot, the 03 layer 20 slot, the 04 layer 13 slot, the 03 layer 04 slot, the 04 layer 47 slot, the 03 layer 38 slot, the 04 layer 31 slot, the 05 layer 23 slot, the 06 layer 12 slot, the 05 layer 03 slot, the 06 layer 50 slot, the 05 layer 41 slot, the 06 layer 30 slot, the 05 layer 21 slot, the 06 layer 14 slot, the 05 layer 05 slot, the 06 layer 48 slot, the 05 layer 39 slot, the 06 layer 32 slot, the 04 layer 29 slot, is connected with the 06 layer 40 slot in the same layer direction, sequentially passes through the 05 layer 49 slot, the 06 layer 04 slot, the 05 layer 13 slot, the 06 layer 22 slot, the 05 layer 31 slot, the 04 layer 39 slot, the 03 layer 48 slot, the 04 layer 03 slot, the 03 layer 12 slot, the 04 layer 21 slot, the 03 layer 30 slot, the 02 layer 38 slot, the 01 layer 47 slot, the 02 layer 02 slot, the 01 layer 11 slot, the 02 layer 20 slot, is connected, and the U2 phase lead terminal (outgoing terminal) goes out from the 01 layer 29 slot.

[0077] Example Two

[0078] As shown in Figure 3 and 4 Compared with Example One, the radial layer number of the stator core is different in the present embodiment, and the remaining settings are the same, in the present embodiment, the radial layer number of the stator core is 8 layers.

[0079] Example Three

[0080] As shown in Figure 5 and 6 Compared with Example One, the slot in which each conductor group 10 of the first layer and the second layer is arranged and the slot in which each conductor group 10 of the fifth layer and the sixth layer is arranged are different, the pitch of the second welding end structure 30 of the second connection structure is different, and the remaining settings are the same, in the present embodiment, the slot in which each conductor group 10 of the first layer and the second layer is located is right-shifted by two slots relative to the slot in which each conductor group 10 of the first layer and the second layer is located in Example One, the slot in which each conductor group 10 of the third layer and the fourth layer is located is the same as the slot in which each conductor group 10 of the third layer and the fourth layer is located in Example One, the slot in which each conductor group 10 of the fifth layer and the sixth layer is located is left-shifted by two slots relative to the slot in which each conductor group 10 of the fifth layer and the sixth layer is located in Example One, and the pitch of the second welding end structure 30 is 10.

[0081] Example Four

[0082] AsFigure 7 and 8 As shown in the figure, the embodiment is the same as the embodiment three except that the radial layers of the stator core are not the same, and the radial layers of the stator core are 8 layers in the embodiment.

[0083] According to the technical scheme, the stator winding is composed of the same conductor group, the conductor group is arranged in the adjacent two layers along the radial direction of the stator core, the conductor group includes at least three conductors, the plurality of conductors are concentrically arranged, and the plurality of conductor groups are arranged in a stepped manner along the radial direction of the stator core in the plug-in end of each phase winding and in the same magnetic pole. The plurality of conductor groups are arranged in sequence along the same circumferential direction of the stator core, so that the short-distance conductor arrangement in the slot of the stator core is uniform. In the welding end of each phase winding, the magnetic poles in which the lead end and the outgoing end of each parallel branch are located and the magnetic poles adjacent to the magnetic poles include a plurality of first connection structures and a plurality of second connection structures. The first connection structure and the second connection structure are arranged in the adjacent two layers along the radial direction of the stator core, the first connection structure and the second connection structure are arranged in sequence along the radial direction of the stator core, the inclination directions of the first connection structure and the second connection structure along the radial direction of the stator core are opposite, and the third connection structure is arranged in the magnetic pole adjacent to the magnetic pole in which the lead end and the outgoing end of each parallel branch are located. The third connection structure is arranged in the same layer, the third connection structure and the lead end and the outgoing end of each parallel branch are not arranged in the same layer, a plurality of first connection structures are arranged in the remaining magnetic poles along the radial direction of the stator core, the conductor short-distance structure arrangement in the slot is relatively more uniform, the stepped arrangement is adopted, and the problems of NVH and noise are better solved, and the motor noise is reduced.

[0084] The above describes the embodiments of the utility model in detail, but the content is only the preferred embodiment of the utility model, and cannot be considered as limiting the scope of the utility model. Any equivalent change and improvement within the scope of the utility model application should still belong to the patent coverage range of the utility model.

Claims

1. A stator winding comprising a multiphase winding, characterized in that: Each phase winding comprises a plurality of conductor groups, the plurality of conductor groups are arranged along the radial direction and the circumferential direction of the stator core, the conductor groups arranged along the radial direction of the stator core in sequence are arranged along the circumferential direction of the stator core in sequence in the same magnetic pole. Each phase winding comprises at least two parallelly connected branch windings, at the welding end of each phase winding, the lead end and the outgoing end of each branch are in the same magnetic pole and another magnetic pole adjacent to the same magnetic pole, along the radial direction of the stator core, a plurality of first connection structures and a plurality of second connection structures are arranged in sequence alternately, the inner part of the two slots of the first connection structure and the inner part of the two slots of the second connection structure are arranged in the adjacent two layers respectively, the inclination direction of the first connection structure and the second connection structure along the radial direction of the stator core is opposite, and the other magnetic pole adjacent to the magnetic pole where the lead end and the outgoing end of each branch are arranged is provided with a third connection structure in the radially innermost layer or the radially outermost layer of the stator core. The third connection structure is not arranged in the same layer as the lead end and the outgoing end of each parallel branch, and the third connection structure comprises at least two welding end structures.

2. The stator winding of claim 1, characterized in that: In addition to the magnetic pole where the lead end and the outgoing end of each branch are arranged and the other magnetic pole adjacent to the magnetic pole, a plurality of first connection structures are arranged along the radial direction of the stator core in sequence.

3. A stator winding according to claim 1 or 2, characterised in that: The first connection structure comprises at least one first welding end structure, and a plurality of first welding end structures are arranged adjacent to each other along the circumferential direction of the stator core; the second connection structure comprises at least two second welding end structures arranged adjacent to each other along the circumferential direction of the stator core, and the pitch of the first welding end structure is different from the pitch of the second welding end structure.

4. A stator winding according to claim 3, characterised in that: A plurality of welding end structures of the third connection structure are arranged adjacent to each other along the circumferential direction of the stator core, and the pitch of the welding end structure of the third connection structure is different from the pitch of the first welding end structure.

5. A stator winding according to claim 1 or 2 or 4, characterised in that: The conductor group is arranged in the adjacent two layers along the radial direction of the stator core, and the conductor group comprises a first conductor, a second conductor and a third conductor arranged adjacent to each other along the circumferential direction of the stator core in sequence, the first conductor is arranged outside the second conductor, and the second conductor is arranged outside the third conductor.

6. The stator winding of claim 1, wherein: The number of radial layers of the stator core is an even number greater than or equal to 6.

7. A stator winding according to claim 6, characterised in that: Along the radial direction of the stator core, any two adjacent conductor groups are arranged with a slot offset along the circumferential direction of the stator core.

8. A stator characterized by: The stator winding comprises the stator winding according to any one of claims 1-7.

9. An electric machine characterized by: The stator comprises the stator according to claim 8.

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