A continuous lap wound stator winding, a stator and an electric machine

Abstract

The application provides a continuous overlap winding stator winding, a stator and a motor, which comprises a multi-phase winding, any phase winding comprises a plurality of coils, the plurality of coils are sequentially arranged along the circumferential direction of the stator core; the coil comprises a plurality of slot interiors and a plurality of turning parts, the plurality of turning parts are arranged on the two axial sides of the stator core, the plurality of slot interiors are respectively arranged in different layers of the two slots of the stator core, and the plurality of slot interiors and the plurality of turning parts are sequentially connected in a head-tail mode; in the plurality of turning parts on one axial side of the coil, at least two opening parts are included, the plurality of opening parts are arranged into two groups, the opening directions of the plurality of opening parts in each group are the same, and the opening directions of the two groups of opening parts are opposite. The beneficial effect of the application is that any phase winding of the stator winding is composed of a plurality of coils of the same type, the coil is a continuous overlap winding structure, the conductor type is single, the welding points are few, the end part of the motor stator winding is low, and the motor size is small.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, and in particular relates to a continuously lapped stator winding, a stator, and a motor. Background Technology

[0002] In the existing technology, motor stator windings often adopt various forms of U-shaped conductor structures, resulting in a wide variety of conductor types. In addition, motor stator windings with U-shaped conductor structures require more welding, have high ends, and have large motor dimensions. Summary of the Invention

[0003] In view of the above problems, the present invention provides a continuously lapped stator winding, a stator and a motor to solve the above or other problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a continuously lapped stator winding, including a multi-phase winding, wherein each phase winding includes multiple coils, and the multiple coils are arranged sequentially along the circumferential direction of the stator core;

[0005] The coil includes multiple slot interiors and multiple bends. The multiple bends are located on both sides of the stator core along the axial direction. The multiple slot interiors are located in different layers of two slots in the stator core. The multiple slot interiors and the multiple bends are connected end to end in sequence.

[0006] The coil also includes lead-out terminals, which are located on either side of the axial direction of the stator core;

[0007] Among the multiple bends located on one side of the axial direction of the coil, there are at least two openings. The multiple openings are arranged in two groups. The opening directions of the multiple openings in each group are the same and are all along the circumferential direction of the stator core. The opening directions of the two groups of openings are opposite.

[0008] Furthermore, the two sets of slots connected to the opening are located in two slots of the stator core, respectively. The slots in one slot are arranged in the radial direction of the stator core at M-layer intervals, and the slots in the other slot are arranged in the radial direction of the stator core at P-layer intervals. M and the other slot have the same number of radial layers in the stator core, and P is greater than or equal to 2.

[0009] Furthermore, among the multiple bends located on the other side of the axial direction of the coil, at least one fitting portion is included. Each fitting portion includes at least two adjacent bends. The interiors of the two sets of slots connected to the fitting portion are respectively located in the radially different layers of the two slots of the stator core. The interiors of one set of slots located in one slot are located in the radially adjacent layers of the stator core, and the interiors of the other set of slots located in the other slot are located in the radially adjacent layers of the stator core.

[0010] Furthermore, in each coil, the number of openings is not less than the number of mating portions.

[0011] Furthermore, the multiple mating portions of each coil extend in the same direction.

[0012] Furthermore, the number of conductor layers in one slot of the stator core is N. If N is a multiple of 4, the lead-out end is located on the side of the coil with the opening; otherwise, the lead-out end is located on the side of the coil with the contact portion.

[0013] Furthermore, the pitch between the slots of each coil located in the two slots can be a full pitch, a short pitch, or a long pitch.

[0014] Furthermore, each phase winding includes at least one branch, and multiple coils in each branch are connected in sequence, with two coils at both ends of the branch connected to the lead end and the output end of the lead end, respectively.

[0015] Furthermore, the stator core has no fewer than 6 radial layers.

[0016] A stator comprising, as described above, continuously lapped stator windings.

[0017] An electric motor, comprising a stator as described above.

[0018] Because of the above technical solution, each phase winding of the stator winding is composed of multiple coils of the same type. The coil is made by winding the radial side of a single conductor stator core into two slots with a specified slot spacing along the circumferential direction of the stator core to the radial side of the stator core. It is a continuous lap winding structure with a single type of conductor, few solder joints, low ends of the motor stator winding, and small motor size. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the stator structure according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a first type of coil according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a second type of coil according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a third type of coil according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a fourth type of coil according to an embodiment of the present invention;

[0024] Figure 6AThis is a schematic diagram of the unfolded structure (first part) of the welding end of a branch winding of any phase winding in Embodiment 1 of the present invention.

[0025] Figure 6B This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 1 of the present invention (Part 2).

[0026] Figure 6C This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 1 of the present invention (Part 3).

[0027] Figure 6D This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 1 of the present invention (Part 4).

[0028] Figure 7A This is a schematic diagram of the unfolded structure (first part) of the welding ends of the two branch windings of any phase winding in Embodiment 1 of the present invention.

[0029] Figure 7B This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 1 of the present invention (Part 2).

[0030] Figure 7C This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 1 of the present invention (Part 3).

[0031] Figure 7D This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 1 of the present invention (Part 4).

[0032] Figure 8A This is a schematic diagram of the unfolded structure (first part) of the welding end of a branch winding of any phase winding in Embodiment 2 of the present invention.

[0033] Figure 8B This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 2 of the present invention (Part 2).

[0034] Figure 8C This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 2 of the present invention (Part 3).

[0035] Figure 8D This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 2 of the present invention (Part 4).

[0036] Figure 9A This is a schematic diagram of the unfolded structure (first part) of the welding ends of the two branch windings of any phase winding in Embodiment 2 of the present invention.

[0037] Figure 9B This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 2 of the present invention (Part 2).

[0038] Figure 9C This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 2 of the present invention (Part 3).

[0039] Figure 9D This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 2 of the present invention (Part 4).

[0040] Figure 10A This is a schematic diagram of the unfolded structure (first part) of the welding ends of the two branch windings of any phase winding in Embodiment 3 of the present invention.

[0041] Figure 10B This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 3 of the present invention (Part 2).

[0042] Figure 10C This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 3 of the present invention (Part 3).

[0043] Figure 10D This is a schematic diagram of the unfolded structure of the welded ends of the two branch windings of any phase winding in Embodiment 3 of the present invention (Part 4).

[0044] Figure 11A This is a schematic diagram of the unfolded structure of the welded ends of the four branch windings of any phase winding in Embodiment 3 of the present invention (first part).

[0045] Figure 11B This is a schematic diagram of the unfolded structure of the welded ends of the four branch windings of any phase winding in Embodiment 3 of the present invention (Part 2).

[0046] Figure 11C This is a schematic diagram of the unfolded structure of the welding ends of the four branch windings of any phase winding in Embodiment 3 of the present invention (Part 3).

[0047] Figure 11D This is a schematic diagram of the unfolded structure of the welding ends of the four branch windings of any phase winding in Embodiment 3 of the present invention (Part 4).

[0048] Figure 12A This is a schematic diagram of the unfolded structure (first part) of the welding end of a branch winding of any phase winding in Embodiment 4 of the present invention.

[0049] Figure 12BThis is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 4 of the present invention (Part 2).

[0050] Figure 12C This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 4 of the present invention (Part 3).

[0051] Figure 12D This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 4 of the present invention (Part 4).

[0052] Figure 13A This is a schematic diagram of the unfolded structure (first part) of the welding ends of the four branch windings of any phase winding in Embodiment 4 of the present invention.

[0053] Figure 13B This is a schematic diagram of the unfolded structure of the welded ends of the four branch windings of any phase winding in Embodiment 4 of the present invention (Part 2).

[0054] Figure 13C This is a schematic diagram of the unfolded structure of the welded ends of the four branch windings of any phase winding in Embodiment 4 of the present invention (Part 3).

[0055] Figure 13D This is a schematic diagram of the unfolded structure of the welded ends of the four branch windings of any phase winding in Embodiment 4 of the present invention (Part 4).

[0056] Figure 14A This is a schematic diagram of the unfolded structure (first part) of the welding end of a branch winding of any phase winding in Embodiment 5 of the present invention.

[0057] Figure 14B This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 5 of the present invention (Part 2).

[0058] Figure 14C This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 5 of the present invention (Part 3).

[0059] Figure 14D This is a schematic diagram of the unfolded structure of the welded end of a branch winding of any phase winding in Embodiment 5 of the present invention (Part 4).

[0060] In the picture:

[0061] 10. Stator winding 20, stator core 100, coil

[0062] 301. Opening; 302. Fitting part; 501. Inside the groove.

[0063] 502. Turning point. Detailed Implementation

[0064] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0065] Figure 1 The diagram shows a structural schematic of an embodiment of the present invention. This embodiment relates to a continuously lapped stator winding, a stator, and a motor. It uses continuously lapped coils connected sequentially to form a branch structure of any phase winding. It is only necessary to connect the lead ends and output ends of two adjacent coils. The winding is prepared using the same type of coil. The coil is prepared by sequentially winding the single conductor stator core from one radial side along the circumferential direction of the stator core into the other radial side of the stator core. The coil type is simple and easy to form, which makes the stator winding preparation process simple and low cost.

[0066] A type of continuously lapped stator winding, such as Figure 1-5 As shown, it includes multi-phase windings. Each phase winding includes multiple coils 100. The multiple coils 100 are arranged sequentially along the circumferential direction of the stator core 20 to construct the structure of any phase winding.

[0067] The coil 100 includes multiple slot interiors 501 and multiple bends 502. The bends 502 are located on both axial sides of the stator core 20. The slot interiors 501 are respectively located in different layers of two slots of the stator core 20. The slot interiors 501 and the bends 502 are connected end to end to form an integral structure of the coil 100. The slot interiors 501 are configured in two groups, with each group located in two different slots of the stator core 20. The pitch between the two slots is selected and set according to requirements, which will not be discussed here. Specifically, in each slot, multiple slots 501 in each group are arranged sequentially along the radial direction of the stator core 20. The multiple slots 501 in each group are located in different radial layers within the same slot of the stator core 20. The number of slots 501 in each group is selected and set according to actual needs, and no specific requirements are made here. The slot 501 has a straight structure, and the two ends of the slot 501 are fixedly connected to two bends 502 located on both sides of the axial direction of the stator core 20. The fixed connection method is preferably integrally formed.

[0068] The aforementioned number of bends 502 located on both sides of the stator core 20 are multiple, and the number of bends 502 on both sides can be the same or different, depending on actual needs. No specific requirements are specified here. The bends 502 connect the slot interiors 501 located in two different slots of the stator core 20, so that the coil 100 is a continuous lapped structure. That is, the coil 100 is formed by a single conductor being wound sequentially from one side of the stator core 20 along the circumferential direction of the stator core 20 to the other side of the radial direction of the stator core 20 with two slot interiors 501 separated by a specified slot pitch. It is a continuously wound coil structure. Therefore, the span of any bend 502 is the pitch between the two slot interiors 501.

[0069] The coil 100 also includes a lead-out end, which is located on either side of the axial direction of the stator core 20. The lead-out end includes a lead end and an outlet end. The lead end is connected to the slot 501 of the coil 100 located in one slot, and the outlet end is connected to the slot 501 of the coil 100 located in another slot. Both the lead end and the outlet end are located on the same side of the axial direction of the stator core 20. The lead end and the outlet end are located in the innermost and outermost radial layers of the stator core 20, respectively. The positions of the lead end and the outlet end can be selected and set according to actual needs, and no specific requirements are made here.

[0070] Each phase winding consists of multiple coils 100 of the same type. The multiple coils 100 of the same type are arranged sequentially along the circumferential direction of the stator core 20. The number of coils 100 in any phase winding is selected and set according to the pitch between the slots 501 located in the two slots of the stator core 20 and the number of slots of the stator core 20. No specific requirements are made here.

[0071] A coil 100 is made by winding a single conductor. For example, the first slot 501 of the coil 100 is located in a slot of the stator core 20 and is located in the outermost radial layer of the stator core 20. Then, the conductor is bent to form a first bend 502 on one axial side of the stator core 20. It is bent again to form a second slot 501 located in another slot of the stator core 20, and the second slot 501 and the first slot 501 are located in different radial layers of the stator core 20. It is bent again to form a first bend 502 on the other axial side of the stator core 20. It is bent again to form a third slot 501 located in the first slot. It is bent again to form a second bend 502 located on one axial side of the stator core 20. It is bent again to form a fourth slot 501 located in the second slot. It is bent again to form a third slot 501 located in the first slot. It is bent again to form a second bend 502 located in the axial side of the stator core 20. It is bent again to form a fourth slot 501 located in the second slot. The fifth slot 501 on the other side of the axial direction of the stator core 20, ..., are bent and wound in sequence until the last slot 501. The last slot 501 is located in the innermost radial layer of the stator core 20 and in the second slot of the stator core 20. During the bending and winding of a single conductor, multiple slots 501 are arranged sequentially from the outermost to the innermost radial layer of the stator core 20. The first slot 501 in the first slot is connected to the lead end, and the last slot 501 in the second slot is connected to the output end, forming an overall structure of a coil 100. Since the coil 100 is wound from a single conductor, each coil 100 can be fitted onto the stator core 20 during installation. Each coil 100 is located in two slots of the stator core 20 separated by a specified pitch and occupies multiple radial layers in each slot.

[0072] Specifically, among the multiple bends 502 located on one side of the axial direction of the coil 100, there are at least two openings 301. The multiple openings 301 are arranged in two groups. The opening directions of the multiple openings 301 in each group are the same, both along the circumferential direction of the stator core 20. The opening directions of the two groups of openings 301 are opposite. One group is clockwise along the circumferential direction of the stator core 20, and the other group is counterclockwise along the circumferential direction of the stator core 20. In the multiple bends 502 on one side of the axial direction of the coil 100, the bending directions of two adjacent bends 502 are different. Therefore, there is an opening 301 between two adjacent bends 502. The number of openings 301 is determined by the number of bends 502 on that side. The multiple openings 301 are set in two groups. The opening direction of the multiple openings 301 in one group is opposite to the opening direction of the multiple openings 301 in the other group. The opening direction of the multiple openings 301 in each group is set along the circumferential direction of the stator core 20.

[0073] Each opening 301 is composed of two bends 502. Each bend 502 has two ends connected to a slot interior 501, and the two slot interiors 501 are located in two different slots of the stator core 20. Therefore, the two sets of slot interiors 501 connected to the opening 301 are located in two slots of the stator core 20. One set of slot interiors 501 located in one slot is radially spaced M layers apart from the stator core 20, and the other set of slot interiors 501 located in the other slot is radially adjacent to the stator core 20 at points P. The number of radial layers M and the number of radial layers P in the stator core 20 of the inner slot 501 of the other group of slots are the same, and P is greater than or equal to 2. The number of radial layers of the stator core 20 of the inner slot 501 of the inner slot in one slot is different from the number of radial layers of the inner slot 501 of the inner slot in another slot. For example, if the inner slot 501 of the inner slot in one slot is located in the first and fourth radial layers of the stator core 20 of that slot, then the inner slot 501 of the inner slot in another slot is located in the second and third radial layers of the stator core 20 of that slot.

[0074] Among the multiple bends 502 located on the other side of the axial direction of the coil 100, at least one contact portion 302 is included. Each contact portion 302 includes at least two adjacent bends 502. On this side of the axial direction of the coil 100, the multiple bends 502 are arranged in multiple groups. The multiple bends 502 in each group form the structure of a contact portion 302. The multiple bends 502 in each group are arranged adjacent to each other. There is a certain distance between the adjacent contact portions 302. This distance is selected according to the radial spacing M layers of the slots 501 connected to the opening 301 on the axial side of the coil 100. No specific requirements are made here.

[0075] The two sets of groove interiors 501 connected to the fitting portion 302 are respectively located in radially different layers within the two grooves of the stator core 20. Specifically, one set of groove interiors 501 located in one groove is disposed in radially adjacent layers of the stator core 20, and the other set of groove interiors 501 located in the other groove is disposed in radially adjacent layers of the stator core 20. Preferably, in this embodiment, the one set of groove interiors 501 located in one groove is disposed in two radially adjacent layers of the stator core 20, and the other set of groove interiors 501 located in the other groove is disposed in two radially adjacent layers of the stator core 20.

[0076] In each coil 100, the number of openings 301 is not less than the number of mating portions 302. The number of openings 301 and mating portions 302 can be the same or different, depending on actual needs; no specific requirements are specified here. Figure 2As shown, a first type of coil 100 is illustrated, which has four openings 301 and three contact portions 302; as Figure 3 As shown, a second type of coil 100 is illustrated, which has four openings 301 and two contact portions 302; as Figure 4 As shown, a third type of coil 100 is illustrated, which has two openings 301 and two contact portions 302; as Figure 5 As shown, a fourth type of coil 100 is illustrated, which has two openings 301 and one contact portion 302. Figures 2-4 In the diagram, 25 represents one axial side of the stator core 20, namely the lead-out side (welded end side), and 26 represents the other axial side of the stator core 20, namely the side without lead-out side (non-welded end side).

[0077] The multiple mating portions 302 of each coil 100 extend in the same direction, all arranged along the circumferential direction of the stator core 20.

[0078] The number of conductor layers in one slot of the stator core 20 is N. If N is a multiple of 4, the lead wire end is located on the side of the coil 100 with the opening 301. Otherwise, if N is not a multiple of 4, the lead wire end is located on the side of the coil 100 with the contact part 302.

[0079] The pitch between the slots 501 of each coil 100 located in two slots can be a full pitch, a short pitch, or a long pitch, which can be selected and set according to actual needs. No specific requirements are made here. The full pitch, short pitch, or long pitch is selected according to the number of slots per pole and per phase. For example, when there are 2 slots per pole and per phase, the full pitch is 6. When there are 3 slots per pole and per phase, the full pitch is 9.

[0080] Each phase winding includes at least one branch, and multiple coils 100 in each branch are connected in sequence. Two coils 100 located at both ends of the branch are connected to the lead end and the output end of the branch, respectively.

[0081] The number of radial layers of stator core 20 shall not be less than 6 layers. The selection and setting shall be made according to actual needs, and no specific requirements are made here.

[0082] A stator comprising, as described above, continuously lapped stator windings.

[0083] An electric motor, comprising a stator as described above.

[0084] The following describes several specific embodiments.

[0085] Example 1

[0086] like Figures 6A-6DAs shown, in this embodiment, the stator winding 10 includes a three-phase winding, the stator core 20 has 144 slots, with 2 slots per pole per phase, and each slot of the stator core 20 has 8 layers in the radial direction. Each phase winding includes 24 coils 100, and the pitch between the slots 501 of two slots in the coil 100 is a whole pitch of 6. The 24 coils 100 are connected sequentially. The phase winding has a branch, the first coil 100 is connected to the lead end of the branch, and the 24th coil 100 is connected to the output end of the branch.

[0087] In this embodiment, the coil 100 includes four first slot interiors 501 and four second slot interiors 501. The first slot interiors 501 and the second slot interiors 501 are respectively located in two slots of the stator core 20. The four first slot interiors 501 are located sequentially in the first, second, fifth, and sixth layers of one slot along the radial direction of the stator core 20. The four second slot interiors 501 are located sequentially in the third, fourth, seventh, and eighth layers of the other slot along the radial direction of the stator core 20. The first slot interiors 501 and the second slot interiors 501 are connected by bends 502 on both sides of the stator core 20 in the axial direction. Specifically, the first slot interiors 501 located in the first layer are connected to the second slot interiors 501 located in the third layer, and the second slot interiors 501 located in the third layer are connected to the second slot interiors 501 located in the second layer. The first slot 501 is connected to the first slot inside the second layer. The first slot 501 in the second layer is connected to the second slot 501 in the fourth layer. The second slot 501 in the fourth layer is connected to the first slot 501 in the fifth layer. The first slot 501 in the fifth layer is connected to the second slot 501 in the seventh layer. The second slot 501 in the seventh layer is connected to the first slot 501 in the sixth layer. The first slot 501 in the sixth layer is connected to the second slot 501 in the eighth layer. The other end of the first slot 501 in the first layer is connected to another coil 100, a lead end, or an output end. The other end of the second slot 501 in the eighth layer is connected to another coil 100, a lead end, or an output end. The selection is made according to the actual setup.

[0088] Specifically, in the first coil 100, the 501 inside the first slot is all located in slot 43, and the 501 inside the second slot is all located in slot 37; in the second coil 100, the 501 inside the first slot is all located in slot 31, and the 501 inside the second slot is all located in slot 25; in the third coil 100, the 501 inside the first slot is all located in slot 19, and the 501 inside the second slot is all located in slot 13; in the fourth coil 100, the 501 inside the first slot is all located in slot 7, and the 501 inside the second slot is all located in slot 1; in the fifth coil 100, the 501 inside the first slot is all located in slot 139, and the 501 inside the second slot is all located in slot 133; in the sixth coil 100, the 501 inside the first slot is all located in slot 127, and the 501 inside the second slot is all located in slot 37. 1. All coils are located in slot 121; 501 inside the first slot of the 7th coil 100 is located in slot 115, and 501 inside the second slot is located in slot 109; 501 inside the first slot of the 8th coil 100 is located in slot 103, and 501 inside the second slot is located in slot 97; 501 inside the first slot of the 9th coil 100 is located in slot 91, and 501 inside the second slot is located in slot 85; 501 inside the first slot of the 10th coil 100 is located in slot 79, and 501 inside the second slot is located in slot 73; 501 inside the first slot of the 11th coil 100 is located in slot 67, and 501 inside the second slot is located in slot 61; 501 inside the first slot of the 12th coil 100 is located in slot 5... In slot 6, the 501 inside the second slot is all located in slot 50; in slot 100 of the 13th coil, the 501 inside the first slot is all located in slot 44, and the 501 inside the second slot is all located in slot 38; in slot 100 of the 14th coil, the 501 inside the first slot is all located in slot 32, and the 501 inside the second slot is all located in slot 26; in slot 100 of the 15th coil, the 501 inside the first slot is all located in slot 20, and the 501 inside the second slot is all located in slot 14; in slot 100 of the 16th coil, the 501 inside the first slot is all located in slot 8, and the 501 inside the second slot is all located in slot 2; in slot 100 of the 17th coil, the 501 inside the first slot is all located in slot 140, and the 501 inside the second slot is all located in slot 134; in slot 100 of the 18th coil... All coils 501 are located in slot 128, and all coils 501 inside the second slot are located in slot 122; all coils 501 inside the first slot of the 19th coil 100 are located in slot 116, and all coils 501 inside the second slot are located in slot 110; all coils 501 inside the first slot of the 20th coil 100 are located in slot 104, and all coils 501 inside the second slot are located in slot 98; all coils 501 inside the first slot of the 21st coil 100 are located in slot 92, and all coils 501 inside the second slot are located in slot 86; all coils 501 inside the first slot of the 22nd coil 100 are located in slot 80, and all coils 501 inside the second slot are located in slot 74; all coils 501 inside the first slot of the 23rd coil 100 are located in slot 68, and all coils 501 inside the second slot are located in slot 62.The first slot 501 of the 24th coil 100 is located in slot 55, and the second slot 501 is located in slot 49; wherein, the lead end of the first coil 100 is the lead end of this branch, and the outlet end of the 24th coil 100 is the outlet end of this branch.

[0089] like Figures 7A-7D As shown, the phase winding has two branches, with 24 coils 100 in one branch and 24 coils 100 in the other branch. The position of the slot in the stator core 20 occupied by each coil 100 is different, but the other structures are the same, which will not be described in detail here.

[0090] Example 2

[0091] like Figures 8A-8D As shown, the difference between this embodiment and the first embodiment is that: in this embodiment, the number of slots per pole per phase is 3, the pitch between the slots 501 of the coil 100 located in two slots is a whole pitch of 9, and there is one branch. The number of coils 100 in one branch is 24. The slots occupied by each coil 100 are different, but the other structures are the same, which will not be described in detail here.

[0092] like Figures 9A-9D As shown, the pitch between the slots 501 in the two slots of the coil 100 is a whole pitch of 9. It has two branches, one branch with 24 coils 100 and the other branch with 24 coils 100. The position of the slot in the stator core 20 occupied by each coil 100 is different, but the other structures are the same, which will not be described in detail here.

[0093] Example 3

[0094] like Figure 10A-10D As shown, the difference between this embodiment and Embodiment 1 and Embodiment 2 is that: there are 2 slots per pole per phase, and the pitch between the slots 501 of the coil 100 located in the two slots is a whole pitch of 6, which has two branches. The structure of the coil 100 in the two branches is the same. In any branch, the number of coils 100 is 12. The number of coils 100 in the two branches is the same. The only difference is the position of the slot of the stator core 20 occupied by each coil 100. Other structures are the same and will not be described in detail here.

[0095] like Figure 11A-11D As shown, the pitch between the slots 501 of the coil 100 located in the two slots is a whole pitch of 6, and there are four branches. Each branch has 12 coils 100. The position of the slot of the stator core 20 occupied by each coil 100 is different, but the other structures are the same, which will not be described in detail here.

[0096] Example 4

[0097] like Figure 12A-12D As shown, this embodiment differs from Embodiments 1, 2, and 3 in that: the number of slots per pole per phase is 2, the pitch between the slots 501 of the coil 100 located in two slots is a short pitch of 5, and there is a branch with 12 coils 100 in the branch. The position of the slot of the stator core 20 occupied by each coil 100 is different, but the other structures are the same, and will not be described in detail here.

[0098] like Figures 13A-13D As shown, the pitch between the slots 501 of the coil 100 located in the slots is a short pitch of 5, and it has four branches. Each branch has 12 coils 100. The position of the slot of the stator core 20 occupied by each coil 100 is different, but the other structures are the same, which will not be described in detail here.

[0099] Example 5

[0100] like Figures 14A-14D As shown, this embodiment differs from Embodiments 1, 2, 3, and 4 in that: the number of slots per pole per phase is 2, the pitch between the slots 501 of the coil 100 located in two slots is a whole pitch of 6, there is one branch, and there are 48 coils 100 in one branch. The position of the slot of the stator core 20 occupied by each coil 100 is different, but the other structures are the same, and will not be described in detail here.

[0101] Because of the above technical solution, each phase winding of the stator winding is composed of multiple coils of the same type. The coil is made by winding the radial side of a single conductor stator core into two slots with a specified slot spacing along the circumferential direction of the stator core to the radial side of the stator core. It is a continuous lap winding structure with a single type of conductor, few solder joints, low ends of the motor stator winding, and small motor size.

[0102] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A continuously nested stator winding, characterized by: The multi-phase winding comprises a plurality of coils arranged in sequence along a circumferential direction of the stator core in any phase winding; The coil is wound by a single conductor, and the single conductor is wound in sequence from inside two slots on one radial side of the stator core to the other radial side of the stator core along the circumferential direction of the stator core with a specified slot pitch; The coil comprises a plurality of slot interiors and a plurality of turn portions, the plurality of turn portions are arranged on both axial sides of the stator core, the plurality of slot interiors are arranged in different layers of the two slots of the stator core respectively, and the plurality of slot interiors and the plurality of turn portions are sequentially connected in head-tail mode; The coil further comprises a lead end, and the lead end is arranged on any axial side of the stator core; Among the plurality of turn portions on one axial side of the coil, at least two opening portions are included, and the plurality of opening portions are arranged in two groups, the opening directions of the plurality of opening portions in each group are the same, and the opening directions of the two groups of opening portions are opposite along the circumferential direction of the stator core.

2. The continuously nested stator winding of claim 1, wherein: The two groups of slot interiors connected with the opening portions are located in the two slots of the stator core respectively, wherein one group of the slot interiors located in one slot is arranged on M layers of the stator core in the radial direction, and the other group of the slot interiors located in the other slot is arranged on P layers of the stator core in the radial direction adjacent to the M layers, M is the same as the number of layers of the other group of the slot interiors in the radial direction of the stator core, and P is greater than or equal to 2.

3. A continuously nested stator winding according to claim 1 or 2, characterized in that: Among the plurality of turn portions on the other axial side of the coil, at least one fitting portion is included, each fitting portion comprises at least two adjacent turn portions, and the two groups of slot interiors connected with the fitting portion are located in different layers in the radial direction of the two slots of the stator core respectively, wherein one group of the slot interiors located in one slot is arranged on adjacent layers of the stator core in the radial direction, and the other group of the slot interiors located in the other slot is arranged on adjacent layers of the stator core in the radial direction.

4. The continuously nested stator winding of claim 3, wherein: The number of the opening portions in each coil is not less than the number of the fitting portions.

5. The continuously nested stator winding of claim 4, wherein: The extension directions of the plurality of fitting portions of each coil are the same.

6. A continuously nested stator winding according to claim 4 or 5, characterized in that: If the number of layers N of the conductor in one slot of the stator core is a multiple of 4, the lead end is arranged on the side of the coil provided with the opening portions, otherwise, the lead end is arranged on the side of the coil provided with the fitting portions.

7. The continuously nested stator winding of claim 1 or 2 or 4 or 5, wherein: The pitch between the slot interiors located in the two slots of each coil is an integral pitch, a short pitch, or a long pitch.

8. The continuously nested stator winding of claim 1 or 2 or 4 or 5, wherein: Each phase winding comprises at least one branch, and the plurality of coils in each branch are sequentially connected, and the two coils located at both ends of the branch are connected with the lead end and the outgoing end of the lead end respectively.

9. The continuously nested stator winding of claim 8, wherein: The number of layers of the stator core in the radial direction is not less than 6.

10. A stator characterized by: The continuous lap winding stator winding comprises the continuous lap winding stator winding according to any one of claims 1-9.

11. An electric machine characterized by: The stator comprises the stator according to claim 10.

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