Stator winding with cross wiring, stator and motor

Abstract

The present invention provides a stator winding with cross-wires, a stator and a motor. The stator winding is a multi-phase winding, the stator winding has M magnetic poles, M is an even number, the number of slots per pole per phase is Q, Q is greater than or equal to 1; each phase winding is X branch windings connected in parallel, X is an even number; any branch winding includes N / 2 coil layers, N is an even number, each coil layer is wound from the starting point to the end point along the circumferential direction, wherein the coil layers wound by the X branches exchange the layer positions multiple times during the winding process of two adjacent layers of coils to form cross-wires, and the number of cross points is Y, and Y is a positive integer greater than or equal to 1. The stator winding with cross-wires is cross-swapped by two layers of continuously wound wires, so that the difference in inductance of each branch is significantly reduced to a state close to 0, so that under the same power input conditions, the circulating current of each branch of the motor is close to 0, the heat generation is reduced, the efficiency is improved, the torque is increased, and the motor power is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator winding with cross wiring, a stator and a motor. Background Art

[0002] The stator winding includes various types of conductors, and the various types of conductor coils are inserted into the slots of the stator core in a certain arrangement to form the required single-phase winding or multi-phase winding of the motor. In the prior art, the continuously wound wave winding motor currently used has large differences in inductance of each branch, resulting in circulating currents between the branches when the motor is running, increased motor heat generation, reduced efficiency, reduced torque, etc.

[0003] In order to improve the above problems, the present invention proposes a stator winding with cross wiring, a stator and a motor. Summary of the invention

[0004] Based on the above description, the present invention provides a stator winding, a stator and a motor with cross-routing, which solves the technical problems in the prior art of circulating current between branches when the motor is running, increased motor heat generation, decreased efficiency and decreased torque.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] In a first aspect, the present invention provides a stator winding with cross wiring, comprising: the stator winding is a multi-phase winding, the stator winding has M magnetic poles, M is an even number, the number of slots per pole per phase is Q, and Q is 1, 2, 3 or 4;

[0007] Each phase winding is composed of X branch windings connected in parallel, where X is an even number; any branch winding includes N / 2 coil layers, where N is an even number, and each coil layer is wound from a starting point to an end point along a circumferential direction by a coil, wherein the coil layers of the X branch windings exchange layer positions multiple times during the winding process of two adjacent layers of coils to form a cross-line, and the number of cross points is Y, where Y is a positive integer greater than or equal to 1.

[0008] Further, each coil layer of each branch winding includes two adjacent winding layers that are cross-located in the radial direction of the stator winding.

[0009] Furthermore, when an M-pole 2-branch winding is used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have one or more intersections in two adjacent layers of winding, and the intersections are all located between any two adjacent poles from 01 to M poles.

[0010] Furthermore, when an M-pole 2-branch winding is used and the number of slots per pole per phase is 1, M is defined as an even number, Q is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have an intersection between two adjacent layers of windings; an intersection is located between the 01 and M poles.

[0011] Furthermore, when an M-pole 2-branch winding is used and the number of slots per pole per phase is 1, M is defined as an even number, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have two intersections in two adjacent layers of winding, and the two intersections span (M-2) / 2 pitches.

[0012] Furthermore, when a 32-pole 2-branch winding is used with 1 slot per pole per phase, M is defined as 32, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as 32, and the coil layers of the two branch windings have two intersections in two adjacent layers of winding, and the two intersections span 15 pitches.

[0013] Furthermore, when an M-pole 2-branch winding is adopted and the number of slots per pole per phase is 1, M is defined as an even number, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have three intersections in two adjacent layers of winding, and two adjacent intersections of the three intersections span M / 4 pitches.

[0014] Furthermore, when a 32-pole 2-branch winding is used with 1 slot per pole per phase, M is defined as 32, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as 32, and the coil layers of the two branch windings have three intersections in two adjacent layers of winding, and 8 pitches are spanned between two adjacent intersections of the three intersections.

[0015] Furthermore, when an M-pole 2-branch winding is used and the number of slots per pole per phase is 1, M is defined as an even number, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have four intersections in two adjacent layers of winding, and the pitches between two adjacent intersections of the four intersections are (M-2) / 6 to M / 4+1.

[0016] Furthermore, when an M-pole 2-branch winding is adopted and the number of slots per pole per phase is 1, M is defined as an even number, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have four intersections in two adjacent layers of winding, and the distance between two adjacent intersections of the four intersections is M / 3 to M / 3-1 pitches.

[0017] Furthermore, when a 32-pole 2-branch winding is used with 1 slot per pole per phase, M is defined as 32, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have four intersections in two adjacent layers of winding, and two adjacent intersections of the four intersections span 6 pitches, 5 pitches, and 9 pitches respectively.

[0018] Further, N / 2 coil layers of each branch winding of each phase winding are connected and constructed by the same conductor, and it is defined that the first branch winding includes the first coil layer and the third coil layer, and the second branch winding includes the second coil layer and the fourth coil layer.

[0019] Further, when M-pole 2-branch winding is used for winding, it is defined that M and N are both even numbers, wherein the starting positions of the two branch windings are adjacent poles, and the number of crossover points of two adjacent winding layers of the multiple coil layers of the two branch windings may be the same as or different from the number of crossover points of the other two adjacent winding layers;

[0020] The starting points of the first coil layer and the third coil layer are defined as 01, the starting points of the second coil layer and the fourth coil layer are defined as M, the windings of the first coil layer and the second coil layer have one or more intersections, and the windings of the third coil layer and the fourth coil layer have one or more intersections.

[0021] Further, when M-pole 2-branch windings are used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, the number of intersections of two adjacent layers of windings in the multiple coil layers of the two branch windings is different from the number of intersections of the other two adjacent layers of windings, the starting point of the first coil layer and the third coil layer is defined as 01, the starting point of the second coil layer and the fourth coil layer is defined as M, the windings of the first coil layer and the second coil layer have 2 intersections, and the windings of the third coil layer and the fourth coil layer have 1 intersection.

[0022] Furthermore, when an M-pole 2-branch winding is used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, the number of intersections of two adjacent layers of windings of the multiple coil layers of the two branch windings is the same as the number of intersections of the other two adjacent layers of windings, but the positions of the intersections are staggered, the starting points of the first coil layer and the third coil layer are defined as 01, the starting points of the second coil layer and the fourth coil layer are defined as M, the windings of the first coil layer and the second coil layer have 2 intersections, the windings of the third coil layer and the fourth coil layer have 2 intersections, but the intersections of the windings of the first coil layer and the second coil layer are staggered with the intersections of the windings of the third coil layer and the fourth coil layer.

[0023] Further, when M-pole 2-branch windings are used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, the number of intersections of two layers of windings of the multiple coil layers of the two branch windings is the same as the number of intersections of the other two adjacent layers of windings, and the intersections are located at the same pole position, the starting point of the first coil layer and the third coil layer is defined as 01, the starting point of the second coil layer and the fourth coil layer is defined as M, the windings of the first coil layer and the second coil layer have 2 intersections, the windings of the third coil layer and the fourth coil layer have 2 intersections, and the intersections of the windings of the first coil layer and the second coil layer and the intersections of the windings of the third coil layer and the fourth coil layer are located at the corresponding same poles.

[0024] Further, it is characterized in that when two adjacent coil layers in each phase winding have an odd number of intersections, it is defined that one of the winding layers in the two coil layers forming the intersection is located at the Pth layer, and the adjacent Pth layer and P-1th layer winding layers are the same branch winding, where P is an odd number.

[0025] Furthermore, when two adjacent coil layers in each phase winding have an even number of intersections, it is defined that one of the winding layers in the two coil layers forming the intersection is located in the Pth layer, and the adjacent Pth layer and P+1th layer winding layers are different branch windings, where P is an even number.

[0026] Furthermore, the number of slots corresponding to the branch windings located in the K-layer winding layer in each of the phase windings is the same, and K is an odd number.

[0027] In a second aspect, the present invention further provides a stator, comprising: a stator core and a stator winding with cross-wires as described in the first aspect;

[0028] The stator core has a plurality of slots formed in a radial inner surface of the stator core and spaced apart in a circumferential direction of the stator core; the stator winding is mounted on the stator core.

[0029] In a third aspect, the present invention further provides a motor, comprising: a rotor and a stator as described in the second aspect; the rotor is rotatable relative to the stator.

[0030] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0031] The stator winding with cross-routing provided by the present invention is provided with a multi-phase winding, each phase stator winding has multiple magnetic poles, and the number of slots per pole per phase is 1 or more; each phase winding is a plurality of branch windings connected in parallel; any branch winding includes multiple layers of coils, each layer of coils is wound from the starting point to the end point along the circumferential direction, and the positions of the layers of two adjacent layers of coils are exchanged multiple times during the winding process to form a cross-routing with multiple intersections.

[0032] Compared with the existing hairpin winding, the stator winding with cross-routing provided by the present invention has two layers of continuously wound wires that are cross-interlaced with each other, so that the difference in inductance of each branch is significantly reduced to a state approaching 0. Therefore, under the same power input conditions, the circulating current of each branch of the motor is close to 0, the heat generation is reduced, the efficiency is improved, the torque is increased, and the motor power is effectively improved. Moreover, the winding structure is simple, the process manufacturing is good, and the efficiency of manufacturing the motor is improved; it is suitable for mass production.

[0033] Furthermore, the stator and the motor provided by the present invention include the above-mentioned stator winding with cross-wires, and therefore, they at least have all the technical effects of the above-mentioned stator winding with cross-wires, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of winding of a stator winding with cross wiring provided in Embodiment 1 of the present invention;

[0035] Figure 2 One of the winding schematic diagrams of the stator winding with cross wiring provided in the second embodiment of the present invention;

[0036] Figure 3 A second winding schematic diagram of a stator winding with cross wiring provided in the second embodiment of the present invention;

[0037] Figure 4A schematic diagram of winding of a stator winding with cross wiring provided in Embodiment 3 of the present invention;

[0038] Figure 5 One of the winding schematic diagrams of the stator winding with cross wiring provided in the fourth embodiment of the present invention;

[0039] Figure 6 The second winding schematic diagram of the stator winding with cross wiring provided in the fourth embodiment of the present invention;

[0040] Figure 7 A schematic diagram of winding of a stator winding with cross wiring provided in Embodiment 5 of the present invention;

[0041] Figure 8 A schematic diagram of winding of a stator winding with cross wiring provided in Embodiment 6 of the present invention;

[0042] Fig. 9 A schematic diagram of winding of a stator winding with cross wiring provided in Embodiment 8 of the present invention;

[0043] Fig.10 A schematic diagram of the winding of a stator winding without cross-wiring provided for a comparative example of the present invention. DETAILED DESCRIPTION

[0044] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood in specific circumstances.

[0046] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0047] The following embodiments of the present invention are further described in detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but cannot be used to limit the scope of the present invention.

[0048] In a first aspect, an embodiment of the present invention provides a stator winding with cross-routing, the stator winding is a multi-phase winding, the stator winding has M magnetic poles, M is an even number, the number of slots per pole per phase is Q, Q is greater than or equal to 1, and Q can be 1, 2, 3 or 4.

[0049] Each phase winding is composed of X branch windings connected in parallel, where X is an even number; any branch winding includes N / 2 coil layers, where N is an even number, and each coil layer is wound from a starting point to an end point along a circumferential direction by a coil, wherein the coil layers of the X branch windings exchange layer positions multiple times during the winding process of two adjacent layers of coils to form a cross-line, and the number of cross points is Y, where Y is a positive integer greater than or equal to 1.

[0050] Each coil layer of each branch winding includes two winding layers which are cross-located in the radial direction of the stator winding and are adjacent to each other.

[0051] In an embodiment, the stator winding is a 3-phase winding, such as Figures 1 to 9 As shown, the stator winding is a schematic diagram of a phase winding. A branch winding of the phase winding includes N / 2 coil layers, where N can be any even number such as 2, 4, 6, 8, etc. Figure 2 , where N is 2, the first branch winding includes 1 coil layer, which is wound from the starting point 1 pole to the end point 32 pole along the circumferential direction, and the second branch winding includes 1 coil layer, which is wound from the starting point 32 pole to the end point 31 pole along the circumferential direction. The two coil layers of the two branch windings exchange layer positions multiple times (here twice) during the winding process of the adjacent first and second layers of coils.

[0052] Specifically, the coil layer of the first branch winding is wound along the first layer from the first pole of the first layer, and the coil layer of the second branch winding is wound along the second layer after crossing from the 32nd pole of the first layer to the 1st pole of the second layer. After the coil layer of the first branch winding and the coil layer of the second branch winding are exchanged once between the 8th pole and the 9th pole, the coil layer of the first branch winding crosses from the 8th pole of the first layer to the 9th pole of the second layer, and then is wound along the second layer. The coil layer of the second branch winding crosses from the 8th pole of the second layer to the 9th pole of the first layer, and then is wound along the first layer. Winding, after the coil layer of the first branch winding and the coil layer of the second branch winding are exchanged once more from the 23rd pole to the 24th pole, the coil layer of the first branch winding crosses from the 23rd pole of the second layer to the 24th pole of the first layer, and then is wound along the first layer, and the coil layer of the second branch winding crosses from the 23rd pole of the first layer to the 24th pole of the second layer, and then is wound along the second layer to form a crossover route, where Y is 2. The difference between other embodiments of the present application and the above-mentioned embodiments lies in the different coil layers and the number of crossover points, which will not be further elaborated here.

[0053] The N / 2 coil layers of each branch winding of each phase winding are connected and constructed by the same conductor, and it is defined that the first branch winding includes the first coil layer and the third coil layer, and the second branch winding includes the second coil layer and the fourth coil layer.

[0054] It should be noted that: when two adjacent coil layers in each phase winding have an odd number of intersections, it is defined that one of the winding layers of the two coil layers forming the intersection is located at the Pth layer, and the adjacent Pth layer and P-1th layer winding layers are the same branch winding, where P is an odd number; for a specific example, please refer to the following embodiment 1 ( Figure 1 ) and Example 3 ( Figure 4 ), wherein, in embodiment 1, the phase winding includes two branch windings, the first branch winding includes a first coil layer, a third coil layer and a fifth coil layer, the second branch winding includes a second coil layer, a fourth coil layer and a sixth coil layer, the two adjacent coil layers of the phase winding have only one intersection, and the intersection is located between the 5th pole and the 6th pole of the fifth coil layer and the sixth coil layer, wherein the winding layer (the 6th pole to the 32nd pole) located in the radial fifth layer of the stator winding in the sixth coil layer of the second branch winding and the winding layer (the 6th pole to the 32nd pole) located in the radial fourth layer of the stator winding in the fourth coil layer of the second branch winding are located in two adjacent layers of the stator winding in the radial direction, and are located in the same branch winding-the second branch winding, where P is an odd number 5.

[0055] In the third embodiment, the phase winding includes two branch windings, the first branch winding includes a first coil layer and a third coil layer, the second branch winding includes a second coil layer and a fourth coil layer, the two adjacent coil layers of the phase winding have only three intersections (the first coil layer and the second coil layer have three intersections, and the third coil layer and the fourth coil layer also have three intersections), the first intersection is located between the 8th pole and the 9th pole of the first coil layer and the second coil layer, the second intersection is located between the 16th pole and the 17th pole of the first coil layer and the second coil layer, and the third intersection is located between the 24th pole and the 25th pole of the first coil layer and the second coil layer, wherein the winding layer (the 8th pole to the 16th pole) located in the radial second layer of the stator winding in the first coil layer of the first branch winding and the winding layer (the 8th pole to the 16th pole) located in the radial third layer of the stator winding in the fourth coil layer of the first branch winding are located in two adjacent layers of the stator winding in the radial direction, and are located in the same branch winding-the first branch winding, where P is an odd number 3.

[0056] When two adjacent coil layers in each phase winding have an even number of intersections, it is defined that one of the winding layers of the two coil layers forming the intersection is located at the P layer, and the adjacent P-th layer and P+1-th layer winding layers are different branch windings, where P is an even number; for specific examples, please refer to the following embodiment 2 ( Figure 3 ) and Example 4 ( Figure 5), wherein, in the second embodiment, the phase winding includes two branch windings, the first branch winding includes a first coil layer and a third coil layer, the second branch winding includes a second coil layer and a fourth coil layer, the two adjacent coil layers of the phase winding have two intersections (the first coil layer and the second coil layer have two intersections, and the third coil layer and the fourth coil layer also have two intersections), and the first intersection is located between the 8th pole and the 9th pole of the first coil layer and the second coil layer, wherein the winding layer (the 9th pole to the 23rd pole) located in the radial second layer of the stator winding in the first coil layer of the first branch winding and the winding layer (the 9th pole to the 23rd pole) located in the radial third layer of the stator winding in the fourth coil layer of the second branch winding are located in two adjacent layers of the stator winding in the radial direction, and are different branch windings - the first branch winding and the second branch winding, where P is an even number 2.

[0057] In embodiment 4, the phase winding includes two branch windings, the first branch winding includes a first coil layer and a third coil layer, the second branch winding includes a second coil layer and a fourth coil layer, the two adjacent coil layers of the phase winding have four intersections (the first coil layer and the second coil layer have four intersections, and the third coil layer and the fourth coil layer also have four intersections), and the first intersection is located between the 6th pole and the 7th pole of the first coil layer and the second coil layer, wherein the winding layer (the 7th pole to the 12th pole) located in the radial second layer of the stator winding in the first coil layer of the first branch winding and the winding layer (the 7th pole to the 12th pole) located in the radial third layer of the stator winding in the fourth coil layer of the second branch winding are located in two adjacent layers of the stator winding in the radial direction, and are different branch windings - the first branch winding and the second branch winding, where P is an even number 2.

[0058] Furthermore, the number of slots corresponding to the branches located in the K-layer winding layer in each phase winding is the same, and K is an odd number.

[0059] Specifically, see Example 2 ( Figure 2), the coil layer of the first branch winding includes winding layers that are cross-located in the radial first layer of the stator winding and the winding layers that are cross-located in the radial second layer, the first winding layer of the coil layer of the first branch winding is located in the first layer from the 1st pole to the 8th pole, the 24th pole to the 31st pole, the second winding layer of the coil layer of the first branch winding is located in the second layer from the 9th pole to the 23rd pole, the 32nd pole; the first winding layer of the coil layer of the second branch winding is located in the second layer from the 1st pole to the 8th pole, the 24th pole to the 31st pole, the second winding layer of the coil layer of the second branch winding is located in the first layer from the 32nd pole, the 9th pole to the 23rd pole. There are 16 slots inside the corresponding poles of the first branch winding located in the first winding layer of the phase winding, and there are also 16 slots inside the corresponding poles of the second branch winding of the first winding layer, that is, the number of slots inside the two branch windings located in the first winding layer of the phase winding is the same. In addition, in the phase winding, there are 16 slots inside the first branch winding corresponding to the pole in the second winding layer, and there are also 16 slots inside the second branch winding corresponding to the pole in the second winding layer.

[0060] See Example 3 ( Figure 4), the coil layer of the first branch winding includes a first winding layer and a second winding layer in the radial direction of the stator winding, and a winding layer and a fourth winding layer in the radial direction of the stator winding. The first winding layer of the coil layer of the first branch winding is the 1st pole to the 8th pole and the 17th pole to the 24th pole located in the first layer, the second winding layer of the coil layer of the first branch winding is the 9th pole to the 16th pole and the 25th pole to the 31st pole located in the second layer, the third winding layer of the coil layer of the first branch winding is the 32nd pole, the 9th pole to the 16th pole and the 25th pole to the 31st pole located in the third layer, and the coil layer of the first branch winding is The fourth winding layer is the 1st to 8th poles, the 17th to 24th poles, and the 32nd pole located on the fourth layer; the first winding layer of the coil layer of the second branch winding is the 1st to 8th poles, the 17th to 24th poles, and the 32nd pole located on the second layer, the second winding layer of the coil layer of the second branch winding is the 9th to 16th poles, the 25th to 31st poles, and the 32nd pole located on the first layer, the third winding layer of the coil layer of the second branch winding is the 1st to 8th poles, the 17th to 24th poles located on the third layer, and the fourth winding layer of the coil layer of the first branch winding is the 9th to 16th poles, and the 25th to 31st poles located on the fourth layer. There are 16 slots inside the corresponding poles of the first branch winding located in the first winding layer of the phase winding, and there are also 16 slots inside the corresponding poles of the second branch winding in the first winding layer. There are 15 slots inside the corresponding poles of the first branch winding located in the second winding layer of the phase winding, and there are 17 slots inside the corresponding poles of the second branch winding in the second winding layer. There are 16 slots inside the corresponding poles of the first branch winding located in the third winding layer of the phase winding, and there are also 16 slots inside the corresponding poles of the second branch winding in the third winding layer. There are 17 slots inside the corresponding poles of the first branch winding located in the fourth winding layer of the phase winding, and there are 15 slots inside the corresponding poles of the second branch winding in the fourth winding layer. It can be seen that the number of slots corresponding to the two branch windings located in the first winding layer of the phase winding is the same, both 16; the number of slots corresponding to the two branch windings located in the third winding layer is also the same, both 16.

[0061] See Example 4 ( Figure 5), the coil layers of the first branch winding include a first winding layer and a second winding layer in the radial direction of the stator winding, as well as a winding layer and a winding layer in the radial third layer and a winding layer in the radial fourth layer of the stator winding. The first winding layer of the coil layer of the first branch winding is the 1st pole to the 6th pole, the 13th pole to the 17th pole, and the 27th pole to the 31st pole located in the first layer. The second winding layer of the coil layer of the first branch winding is the 7th pole to the 12th pole, the 19th pole to the 25th pole, and the 32nd pole located in the second layer. The third winding layer of the coil layer of the first branch winding is the 1st pole to the 6th pole, the 13th pole to the 17th pole, and the 27th pole to the 31st pole located in the third layer. The four winding layers are the 7th to 12th poles, the 18th to 26th poles, and the 32nd pole on the fourth layer; the first winding layer of the coil layer of the second branch winding is the 7th to 12th poles, the 18th to 26th poles, and the 32nd pole on the first layer, the second winding layer of the coil layer of the second branch winding is the 1st to 6th poles, the 13th to 18th poles, and the 26th to 31st poles on the second layer, the third winding layer of the coil layer of the second branch winding is the 7th to 12th poles, the 18th to 26th poles, and the 32nd pole on the third layer, and the fourth winding layer of the coil layer of the second branch winding is the 1st to 6th poles, the 13th to 17th poles, and the 27th to 31st poles on the fourth layer. There are 16 slots inside the corresponding poles of the first branch winding located in the first winding layer of the phase winding, and there are also 16 slots inside the corresponding poles of the second branch winding in the first winding layer. There are 14 slots inside the corresponding poles of the first branch winding located in the second winding layer of the phase winding, and there are 18 slots inside the corresponding poles of the second branch winding in the second winding layer. There are 16 slots inside the corresponding poles of the first branch winding located in the third winding layer of the phase winding, and there are also 16 slots inside the corresponding poles of the second branch winding in the third winding layer. There are 16 slots inside the corresponding poles of the first branch winding located in the fourth winding layer of the phase winding, and there are 16 slots inside the corresponding poles of the second branch winding in the fourth winding layer. It can be seen that the number of slots corresponding to the two branch windings located in the first winding layer of the phase winding is the same, both 16; the number of slots corresponding to the two branch windings located in the third winding layer is also the same, both 16.

[0062] The following is a further introduction with reference to specific embodiments and examples:

[0063] Embodiment 1:

[0064] The solution of this embodiment is: when winding is performed in a manner of M-pole 2-branch winding and the number of slots per pole per phase is 1, M is defined as an even number, Q is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have an intersection between two adjacent layers of windings; the one intersection is located between the 01 and M poles.

[0065] Specific example: Figure 1 As shown, when a 32-pole 2-branch winding is used and the number of slots per pole per phase is 1, the starting point of the first branch winding is 02 and the starting point of the second branch winding is 01 (equivalent to the starting point of the first branch winding being 01 and the starting point of the second branch winding being 32), each branch has three coil layers, a total of six coil layers, and the coil layers of the two branch windings have one intersection between two adjacent winding layers, as shown in FIG. Figure 1 As shown, the intersection is located between poles 05 and 06, that is, the first branch winding crosses at pole 05 of the fifth layer to pole 06 of the sixth layer, and the final end point is located at pole 01 of the sixth layer. Correspondingly, the second branch winding crosses at pole 05 of the sixth layer to pole 06 of the fifth layer, and the final end point is located at pole 32 of the fifth layer.

[0066] This is only an example. Those skilled in the art can implement other implementation schemes in which two adjacent layers of winding have one intersection based on the above example. The specific structure will not be described here one by one, that is, all implementation schemes with one intersection similar to the above structure can fall within the protection scope of the present invention.

[0067] Embodiment 2

[0068] The solution of this embodiment is: when winding is performed in a manner of M-pole 2-branch winding and the number of slots per pole per phase is 1, M is defined as an even number, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have two intersections in two adjacent layers of winding, and the two intersections span (M-2) / 2 pitches.

[0069] Specific example 1: Figure 2 As shown, when a 32-pole 2-branch winding is used and the number of slots per pole per phase is 1, the starting point of the first branch winding is 01, the starting point of the second branch winding is 32, each branch has one coil layer, a total of two coil layers, and the coil layers of the two branch windings have two intersections in the two adjacent winding layers, as shown in FIG. Figure 2As shown, the two intersections are located at poles 08-09 and 23-24, respectively, and there are 15 pitches between the two intersections, that is, the first branch winding crosses from pole 08 of the first layer to pole 09 of the second layer, and then crosses from pole 23 of the second layer to pole 24 of the first layer, and finally ends at pole 32 of the second layer. Correspondingly, the second branch winding crosses from pole 08 of the second layer to pole 09 of the first layer, and then crosses from pole 23 of the first layer to pole 24 of the second layer, and finally ends at pole 31 of the second layer.

[0070] Specific example 2: Figure 3 As shown, when a 32-pole 2-branch winding is used, and the number of slots per pole per phase is 1, the starting point of the first branch winding is 01, and the starting point of the second branch winding is 32. Each branch has two coil layers, a total of four coil layers, and the coil layers of the two branch windings have two intersections in the two adjacent layers of winding, that is, there are two intersections in the first coil layer and the second coil layer, and there are also two intersections in the third coil layer and the fourth coil layer. Figure 3 As shown, the two intersection points of the first coil layer and the second coil layer are located at the 08-09 pole and the 23-24 pole respectively, and the two intersection points of the third coil layer and the fourth coil layer are also located at the 08-09 pole and the 23-24 pole respectively. It should be noted that the third coil layer and the first coil layer are the same branch coil, and the fourth coil layer and the second coil layer are the same branch coil.

[0071] That is, the first coil layer of the first branch winding crosses the 08th pole of the first layer to the 09th pole of the second layer, and then crosses the 23rd pole of the second layer to the 24th pole of the first layer. The first coil layer passes from the 32nd pole to the 01st pole of the third layer, forming the starting point of the second coil layer of the first branch. The second coil layer starts from the 01st pole of the third layer, crosses the 08th pole of the third layer to the 09th pole of the fourth layer, and then crosses the 23rd pole of the fourth layer to the 24th pole of the third layer, and finally ends at the 32nd pole of the fourth layer. Correspondingly, The first coil layer of the second branch winding crosses at pole 08 of the second layer to pole 09 of the first layer, and then crosses from pole 23 of the first layer to pole 24 of the second layer. The first coil layer passes from pole 31 to pole 32 of the fourth layer, forming the starting point of the second coil layer of the second branch. The second coil layer winding starts from pole 32 of the fourth layer. The second coil layer winding crosses at pole 08 of the fourth layer to pole 09 of the third layer, and then crosses from pole 23 of the third layer to pole 24 of the fourth layer, and finally ends at pole 31 of the fourth layer.

[0072] This is only an example. Those skilled in the art can implement other implementations of two adjacent layers of windings with two intersections based on the above examples. The specific structures will not be described here one by one, that is, all implementation schemes similar to the above structures can fall within the protection scope of the present invention.

[0073] Embodiment 3

[0074] The solution of this embodiment is: when an M-pole 2-branch winding is adopted and the number of slots per pole per phase is 1, M is defined as an even number, O is 1, and N is an even number, and each phase winding includes multiple layers of windings, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have three intersections in two adjacent layers of windings, and two adjacent intersections of the three intersections span M / 4 pitches.

[0075] Specific example: Figure 4 As shown, when a 32-pole 2-branch winding is used and the number of slots per pole per phase is 1, the starting point of the first branch winding is 01, the starting point of the second branch winding is 32, each branch has two coil layers, a total of four coil layers, and the coil layers of the two branch windings have three intersections in the two adjacent winding layers, as shown in FIG. Figure 4 As shown, the three intersections of two adjacent layers are located at poles 08-09, poles 16-17 and poles 24-25, respectively, and the three intersections span 8 pitches in sequence.

[0076] That is, the first coil layer of the first branch winding crosses at the 08th pole of the first layer to the 09th pole of the second layer, then crosses at the 16th pole of the second layer to the 17th pole of the first layer, then crosses at the 24th pole of the first layer to the 25th pole of the second layer, the first coil layer passes at the 31st pole to the 01st pole of the fourth layer, forming the starting point of the second coil layer of the first branch, the second coil layer winding starts from the 01st pole of the fourth layer, crosses at the 08th pole of the fourth layer to the 09th pole of the third layer, then crosses at the 16th pole of the third layer to the 17th pole of the fourth layer, then crosses at the 24th pole of the fourth layer to the 25th pole of the third layer, and finally the end point is located at the 32nd pole of the fourth layer; Correspondingly, the first coil layer of the second branch winding crosses at the 08th pole of the second layer to the 09th pole of the first layer, then crosses at the 16th pole of the first layer to the 17th pole of the second layer, then crosses at the 24th pole of the second layer to the 25th pole of the first layer, the first coil layer passes at the 31st pole to the 01st pole of the third layer, forming the starting point of the second coil layer of the second branch, the second coil layer winding starts from the 01st pole of the third layer, crosses at the 08th pole of the third layer to the 09th pole of the fourth layer, then crosses at the 16th pole of the fourth layer to the 17th pole of the third layer, then crosses at the 24th pole of the third layer to the 25th pole of the fourth layer, and finally the end point is located at the 31st pole of the fourth layer.

[0077] This is only an example. Those skilled in the art can implement other implementation schemes in which two adjacent layers of winding have three intersections based on the above example. The specific structure will not be described here one by one, that is, all implementation schemes similar to the above structure can fall within the protection scope of the present invention.

[0078] Embodiment 4

[0079] The solution of this embodiment is: when winding is performed in a manner of M-pole 2-branch winding and 1 slot per pole per phase, M is defined as an even number, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the two-layer winding has four intersections, and two adjacent intersections of the four intersections span (M-2) / 6 to M / 4+1 pitches or M / 3 to M / 3-1 pitches.

[0080] Specific example 1: Figure 5 As shown, when a 32-pole 2-branch winding is used and the number of slots per pole per phase is 1, the starting point of the first branch winding is 01, the starting point of the second branch winding is 32, each branch has two coil layers, a total of four coil layers, and the coil layers of the two branch windings have 4 intersections in the two adjacent winding layers, as shown in FIG. Figure 5 As shown, the four intersections of two adjacent layers are located at poles 06-07, 12-13, 17-18 and 26-27 respectively, and the four intersections span 6, 5 and 9 pitches respectively. This embodiment meets the requirement of spanning (M-2) / 6 to M / 4+1 pitches.

[0081] That is, the first coil layer of the first branch winding crosses at the 06th pole of the first layer to the 07th pole of the second layer, then crosses at the 12th pole of the second layer to the 13th pole of the first layer, then crosses at the 17th pole of the first layer to the 18th pole of the second layer, then crosses at the 26th pole of the second layer to the 27th pole of the first layer, the first coil layer passes from the 31st pole of the first layer to the 01st pole of the third layer, forming the starting point of the second coil layer of the first branch winding, the second coil layer winding starts from the 01st pole of the third layer, crosses at the 06th pole of the third layer to the 07th pole of the fourth layer, then crosses at the 12th pole of the fourth layer to the 13th pole of the third layer, then crosses at the 17th pole of the third layer to the 18th pole of the fourth layer, then crosses at the 26th pole of the fourth layer to the 27th pole of the third layer, and finally the end point is located at the 32nd pole of the fourth layer ; Correspondingly, the first coil layer of the second branch is wound at the 06th pole of the second layer, crosses to the 07th pole of the first layer, crosses to the 12th pole of the first layer, crosses to the 13th pole of the second layer, crosses to the 17th pole of the second layer, crosses to the 18th pole of the first layer, crosses to the 26th pole of the first layer, and passes to the 27th pole of the second layer. The first coil layer passes from the 31st pole of the second layer to the 01st pole of the fourth layer, forming the starting point of the second coil layer of the second branch. The second coil layer starts winding from the 01st pole of the fourth layer, crosses to the 06th pole of the fourth layer to the 07th pole of the third layer, crosses to the 12th pole of the third layer to the 13th pole of the fourth layer, crosses to the 17th pole of the fourth layer to the 18th pole of the third layer, crosses to the 26th pole of the third layer to the 27th pole of the fourth layer, and finally the end point is located at the 31st pole of the fourth layer.

[0082] Specific example 2: Figure 6 As shown, when a 32-pole 2-branch winding is used and the number of slots per pole per phase is 1, the starting point of the first branch winding is 01, the starting point of the second branch winding is 32, each branch has two coil layers, a total of four coil layers, and the coil layers of the two branch windings have 4 intersections in the two adjacent winding layers, as shown in FIG. Figure 6 As shown, the four intersections of two adjacent layers are located at poles 06-07, 13-14, 20-21 and 28-29 respectively, and the four intersections span 7, 7 and 8 pitches respectively. This embodiment meets the requirement of spanning M / 3 to M / 3-1 pitches.

[0083] That is, the first coil layer of the first branch is wound at the 06th pole of the first layer, crosses to the 07th pole of the second layer, crosses to the 13th pole of the second layer, crosses to the 14th pole of the first layer, crosses to the 20th pole of the first layer, crosses to the 21st pole of the second layer, crosses to the 28th pole of the second layer, crosses to the 29th pole of the first layer, the first coil layer is wound at the 31st pole of the first layer to the 01st pole of the third layer, forming the starting point of the second coil layer of the first branch, the second coil layer is wound from the 01st pole of the third layer, crosses to the 06th pole of the third layer to the 07th pole of the fourth layer, crosses to the 13th pole of the fourth layer to the 14th pole of the third layer, crosses to the 20th pole of the third layer to the 21st pole of the fourth layer, crosses to the 28th pole of the fourth layer to the 29th pole of the third layer, and finally the end point is located at the 32nd pole of the fourth layer; Correspondingly, the first coil layer winding of the second branch crosses at the 06th pole of the second layer to the 07th pole of the first layer, and then crosses at the 13th pole of the first layer to the 14th pole of the second layer, and then crosses at the 20th pole of the second layer to the 21st pole of the first layer, and then crosses at the 28th pole of the first layer to the 29th pole of the second layer. The first coil layer passes from the 31st pole of the second layer to the 01st pole of the fourth layer, forming the starting point of the second coil layer of the second branch. The second coil layer winding starts from the 01st pole of the fourth layer, crosses at the 06th pole of the fourth layer to the 07th pole of the third layer, and then crosses at the 13th pole of the third layer to the 14th pole of the fourth layer, and then crosses at the 20th pole of the fourth layer to the 21st pole of the third layer, and then crosses at the 28th pole of the third layer to the 29th pole of the fourth layer, and finally the end point is located at the 31st pole of the fourth layer.

[0084] This is only an example. Those skilled in the art can implement other implementation schemes in which two adjacent layers of windings have four intersections based on the above examples. The specific structures will not be described here one by one, that is, all implementation schemes similar to the above structures can fall within the protection scope of the present invention.

[0085] Embodiment 5

[0086] The solution of this embodiment is: when M-pole 2-branch windings are used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, and the number of intersection points of two layers of windings of the multiple coil layers of the two branch windings is different.

[0087] The first branch winding includes a first coil layer and a third coil layer, and the second branch winding includes a second coil layer and a fourth coil layer. The starting points of the first coil layer and the third coil layer are defined as 01, and the starting points of the second coil layer and the fourth coil layer are defined as M. The windings of the first coil layer and the second coil layer have one or more intersections, and the windings of the third coil layer and the fourth coil layer have one or more intersections.

[0088] Specific example: When M-pole 2-branch winding is used for winding, M and N are defined as even numbers, and each phase winding includes multiple layers of windings, wherein the starting positions of two adjacent layers of windings are adjacent poles, and the intersection points of two layers of windings in the multiple coil layers of the two branch windings are different. The starting points of the first layer of winding and the third layer of winding are defined as 01, and the starting points of the second layer of winding and the fourth layer of winding are defined as M. The first layer and the second layer of winding have 2 intersection points, and the third layer and the fourth layer of winding have 1 intersection point.

[0089] like Figure 7 As shown, when a 32-pole 2-branch winding is used and the number of slots per pole per phase is 1, the starting point of the first branch winding is 01, the starting point of the second branch winding is 32, each branch has two coil layers, a total of four coil layers, the first and second winding layers have 2 crossover points, and the third and fourth winding layers have 1 crossover point, as shown in FIG. Figure 7 As shown, the two intersection points of the first and second winding layers are located at poles 08-09 and 23-24 respectively, and one intersection point of the third and fourth winding layers is located at poles 16-17.

[0090] That is, the first coil layer winding of the first branch crosses the 08th pole of the first layer to the 09th pole of the second layer, and then crosses the 23rd pole of the second layer to the 24th pole of the first layer. The first coil layer passes through the 31st pole of the first layer to the 01st pole of the third layer, forming the starting point of the second coil layer of the first branch. The second coil layer winding starts from the 01st pole of the third layer, crosses the 16th pole of the third layer to the 17th pole of the fourth layer, and finally ends at the 32nd pole of the fourth layer; correspondingly, the first coil layer winding of the second branch crosses the 08th pole of the second layer to the 09th pole of the first layer, and then crosses the 23rd pole of the first layer to the 24th pole of the second layer. The first coil layer passes through the 31st pole of the second layer to the 01st pole of the fourth layer, forming the starting point of the second coil layer of the second branch. The second coil layer winding starts from the 01st pole of the fourth layer, crosses the 16th pole of the fourth layer to the 17th pole of the third layer, and finally ends at the 31st pole of the fourth layer.

[0091] This is only an example. Those skilled in the art can implement other implementation schemes in which two adjacent layers have different numbers of intersections based on the above examples. The specific structures will not be described here one by one, that is, all implementation schemes similar to the above structures can fall within the protection scope of the present invention.

[0092] Embodiment 6

[0093] The solution of this embodiment is: when an M-pole 2-branch winding is used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, and the number of intersections of two adjacent winding layers of the multiple coil layers of the two branch windings is the same as the number of intersections of the other two adjacent winding layers, but the positions are different, that is, the intersections are staggered.

[0094] The first branch winding includes a first coil layer and a third coil layer, and the second branch winding includes a second coil layer and a fourth coil layer. The starting points of the first coil layer and the third coil layer are defined as 01, and the starting points of the second coil layer and the fourth coil layer are defined as M. The windings of the first coil layer and the second coil layer have one or more intersections, and the windings of the third coil layer and the fourth coil layer have one or more intersections.

[0095] Specific example: when M-pole 2-branch winding is used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, and the number of intersections of two adjacent windings of the multiple coil layers of the two branch windings is the same as the number of intersections of the other two adjacent windings; the starting point of the first coil layer and the third coil layer is defined as 01, and the starting point of the second coil layer and the fourth coil layer is defined as M, the windings of the first coil layer and the second coil layer have 2 intersections, and the windings of the third coil layer and the fourth coil layer have 2 intersections, but the intersections of the first and second windings are staggered with the intersections of the third and fourth windings.

[0096] like Figure 8 As shown, when a 32-pole 2-branch winding is used, and the number of slots per pole per phase is 1, the starting point of the first branch winding is 01, and the starting point of the second branch winding is 32. Each branch has two coil layers, a total of four coil layers. The first coil layer and the second coil layer winding have two intersections, and the third coil layer and the fourth coil layer winding also have two intersections. However, the two intersections of the first coil layer and the second coil layer winding are staggered with the two intersections of the third coil layer and the fourth coil layer winding. Figure 8 As shown, the two intersection points of the windings of the first coil layer and the second coil layer are located at poles 08-09 and 23-24 respectively, and the two intersection points of the windings of the third coil layer and the fourth coil layer are located at poles 09-10 and 24-25.

[0097] That is, the first coil layer of the first branch winding is wound at the 08th pole of the first layer, crosses to the 09th pole of the second layer, and then crosses from the 23rd pole of the second layer to the 24th pole of the first layer. The first coil layer is wound at the 31st pole of the first layer to the 01st pole of the third layer, forming the starting point of the second coil layer of the first branch. The second coil layer starts winding from the 01st pole of the third layer, crosses to the 10th pole of the fourth layer at the 09th pole of the third layer, and then crosses from the 24th pole of the fourth layer to the 25th pole of the third layer, and finally ends at the 32nd pole of the fourth layer. Correspondingly, the first coil layer of the second branch winding crosses at the 08th pole of the second layer to the 09th pole of the first layer, and then crosses from the 23rd pole of the first layer to the 24th pole of the second layer. The first coil layer passes from the 31st pole of the second layer to the 01st pole of the fourth layer, forming the starting point of the second coil layer of the second branch. The second coil layer winding starts from the 01st pole of the fourth layer, crosses at the 09th pole of the fourth layer to the 10th pole of the third layer, and then crosses from the 24th pole of the third layer to the 25th pole of the fourth layer, and finally ends at the 31st pole of the fourth layer.

[0098] This is only an example. Those skilled in the art can implement other implementation schemes in which two adjacent layers have the same number of intersections but the intersections are staggered based on the above examples. The specific structures will not be described here one by one, that is, all implementation schemes similar to the above structures can fall within the protection scope of the present invention.

[0099] Embodiment 7

[0100] The solution of this embodiment is: when M-pole 2-branch windings are used for winding, M and N are defined as even numbers, wherein the starting positions of two adjacent layers of windings of the two branch windings are adjacent poles, the number of intersection points of two layers of windings of the multiple coil layers of the two branch windings is the same as the number of intersection points of the other two layers of windings, the starting point of the first coil layer and the third coil layer is defined as 01, the starting point of the second coil layer and the fourth coil layer is defined as M, the first coil layer and the second coil layer, the third coil layer and the fourth coil layer all have 2, 3 or 4 intersection points, but the intersection point of the windings of the first coil layer and the second coil layer is the same as the intersection point of the windings of the third coil layer and the fourth coil layer, that is, the number and position of intersection points of the first coil layer and the third coil layer, the second coil layer and the fourth coil layer are the same.

[0101] For specific implementation examples of this embodiment, please refer to Embodiment 2 to Embodiment 4 (corresponding to Figures 3 to 5 ), the specific location of the intersection can also be found in the introduction of the above embodiment, and will not be repeated here.

[0102] Embodiment 8

[0103] The solution of this embodiment is: when a 32-pole 2-branch winding is used, and the number of slots per pole per phase is 1, the starting point of the first branch winding is 02, and the starting point of the second branch winding is 01 (equivalent to the starting point of the first branch winding being 01 and the starting point of the second branch winding being 32), each branch winding has three coil layers, a total of six coil layers, the first coil layer and the second coil layer winding have two intersections, the third coil layer and the fourth coil layer winding also have two intersections, the fifth coil layer and the sixth coil layer winding also have two intersections, a total of six intersections. Fig. 9 As shown, the two intersections of the windings of the first coil layer and the second coil layer, the two intersections of the windings of the third coil layer and the fourth coil layer, and the two intersections of the windings of the fifth coil layer and the sixth coil layer are respectively located at the 09-10 pole and the 24-25 pole.

[0104] That is, the first coil layer of the first branch is wound at the 09th pole of the first layer, crosses to the 10th pole of the second layer, and then crosses to the 25th pole of the first layer from the 24th pole of the second layer. The first coil layer is wound at the 32nd pole of the first layer to the 02th pole of the third layer, forming the starting point of the second coil layer of the first branch. The second coil layer starts winding from the 02th pole of the third layer, crosses to the 10th pole of the fourth layer from the 09th pole of the third layer, and then crosses to the 25th pole of the third layer from the 24th pole of the fourth layer. The second coil layer is wound at the 32nd pole of the third layer to the 02th pole of the fifth layer, forming the starting point of the third coil layer of the first branch. The third coil layer starts winding from the 02th pole of the fifth layer, crosses to the 10th pole of the sixth layer from the 09th pole of the fifth layer, and then crosses to the 25th pole of the fifth layer from the 24th pole of the sixth layer, and finally ends at the 01th pole of the sixth layer. Correspondingly, the first coil layer winding of the second branch crosses at the 09th pole of the second layer to the 10th pole of the first layer, and then crosses from the 24th pole of the first layer to the 25th pole of the second layer. The first coil layer passes from the 32nd pole of the second layer to the 02nd pole of the fourth layer, forming the starting point of the second coil layer of the second branch. The second coil layer winding starts from the 02nd pole of the fourth layer, crosses at the 09th pole of the fourth layer to the 10th pole of the third layer, and then crosses from the 24th pole of the third layer to the 25th pole of the fourth layer. The second coil layer passes from the 32nd pole of the fourth layer to the 02nd pole of the sixth layer, forming the starting point of the third coil layer of the first branch. The third coil layer winding starts from the 02nd pole of the sixth layer, crosses at the 09th pole of the sixth layer to the 10th pole of the fifth layer, and then crosses from the 24th pole of the fifth layer to the 25th pole of the sixth layer. The final end point is located at the 32nd pole of the sixth layer.

[0105] This is only an example. Those skilled in the art can implement other implementation schemes of the six-layer coil structure based on the above example. The specific structure will not be described here one by one. That is, all implementation schemes similar to the above structure can fall within the protection scope of the present invention.

[0106] Comparative Example

[0107] The scheme of this comparative example is: compared with the difference of Example 1, Fig.10 As shown, this comparative example does not include crossover traces.

[0108] Performance Analysis:

[0109] The inductance results of Example 1 (crossing 1 time), Example 8 (crossing 2x3 times) and the comparative example (crossing 0 times) are compared to obtain Table 1:

[0110] Table 1

[0111]

[0112] It can be seen from the above embodiments and Table 1 that: by cross-interchanging the two layers of continuously wound wires, the difference in inductance of each branch is significantly reduced to a state approaching 0, so that under the same power input conditions, the circulating current of each branch of the motor with cross-wires is close to 0, the heat generation is reduced, the efficiency is improved, the torque is increased, and the more cross-points there are, the better the performance.

[0113] In a second aspect, an embodiment of the present invention further provides a stator, comprising a stator core and a stator winding with cross-routing as described in any embodiment of the first aspect; the stator core has a plurality of slots formed in the radial inner surface of the stator core and spaced apart in the circumferential direction of the stator core; the stator winding is mounted on the stator core.

[0114] In a third aspect, an embodiment of the present invention further provides a motor, comprising a rotor and a stator as described in the second aspect; the rotor is rotatable relative to the stator.

[0115] Since the stator and the motor adopt the stator winding with cross-wires described in the above-mentioned embodiments, the specific structure of the stator winding with cross-wires refers to the above-mentioned embodiments. Since the motor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0116] In the description of this specification, the description with reference to the terms "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these 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 invention.

Claims

1. A continuous stator winding with cross-wires, characterized in that: The stator winding is a multi-phase winding, and the stator winding has M magnetic poles, M is an even number, and the number of slots per pole per phase is Q, and Q is greater than or equal to 1; each of the phase windings is X branch windings connected in parallel, and X is an even number; any of the branch windings includes N / 2 coil layers, N is an even number, and each of the coil layers is wound from the starting point to the end point in the circumferential direction, wherein the coil layers of the X branch windings exchange layer positions multiple times during the winding process of two adjacent layers of coils to form cross-lines, and the number of intersections is Y, and Y is a positive integer greater than or equal to 1; the N / 2 coil layers of each branch winding of each phase winding are constructed by connecting the same conductor, and it is defined that the first branch winding includes the first coil layer and the third coil layer, and the second branch winding includes the second coil layer and the fourth coil layer; the starting positions of the two branch windings are adjacent poles, and the number of intersections of two adjacent windings of the multiple coil layers of the two branch windings can be the same as or different from the number of intersections of the other two adjacent windings; The starting points of the first coil layer and the third coil layer are defined as 01, the starting points of the second coil layer and the fourth coil layer are defined as M, the windings of the first coil layer and the second coil layer have one or more intersections, and the windings of the third coil layer and the fourth coil layer have one or more intersections.

2. The continuous stator winding with crossed wiring according to claim 1, characterized in that: Each coil layer of each branch winding includes two adjacent winding layers that are cross-located in the radial direction of the stator winding.

3. The continuous stator winding with crossed wiring according to claim 1, characterized in that: When an M-pole 2-branch winding is used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have one or more intersections in the two adjacent layers of winding, and the intersections are all located between any two adjacent poles from 01 to M poles.

4. The continuous stator winding with crossed wiring according to claim 3, characterized in that: When winding is performed in a manner of M-pole 2-branch winding and 1 slot per pole per phase, M is defined as an even number, Q is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have an intersection point between two adjacent winding layers, and the intersection point is located between the 01 and M poles.

5. The continuous stator winding with crossed wiring according to claim 3, characterized in that: When an M-pole 2-branch winding is used and the number of slots per pole per phase is 1, M is defined as an even number, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have two intersections in the two adjacent layers of winding, and the two intersections span (M-2) / 2 pitches.

6. The continuous stator winding with crossed wiring according to claim 5, characterized in that: When a 32-pole 2-branch winding is used with 1 slot per pole per phase, M is defined as 32, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as 32, and the coil layers of the two branch windings have two intersections in two adjacent layers of winding, and 15 pitches are spanned between the two intersections.

7. The continuous stator winding with crossed wiring according to claim 3, characterized in that: When winding is performed in a manner of M-pole 2-branch winding and 1 slot per pole per phase, M is defined as an even number, O is defined as 1, and N is defined as an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have three intersections in two adjacent layers of winding, and two adjacent intersections of the three intersections span M / 4 pitches.

8. The continuous stator winding with crossed wiring according to claim 7, characterized in that: When a 32-pole 2-branch winding is used with 1 slot per pole per phase, M is defined as 32, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as 32, and the coil layers of the two branch windings have three intersections in two adjacent layers of winding, and 8 pitches are spanned between two adjacent intersections of the three intersections.

9. The continuous stator winding with crossed wiring according to claim 3, characterized in that: When winding is performed in a manner of M-pole 2-branch winding and 1 slot per pole per phase, M is defined as an even number, O is defined as 1, and N is defined as an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have four intersections in two adjacent layers of winding, and the pitches between two adjacent intersections of the four intersections are (M-2) / 6 to M / 4+1.

10. The continuous stator winding with crossed wiring according to claim 3, characterized in that: When an M-pole 2-branch winding is used and the number of slots per pole per phase is 1, M is defined as an even number, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have four intersections in two adjacent layers of winding, and the distance between two adjacent intersections of the four intersections is M / 3 to M / 3-1 pitches.

11. The continuous stator winding with crossed wiring according to claim 9, characterized in that: When a 32-pole 2-branch winding is used with 1 slot per pole per phase, M is defined as 32, O is 1, and N is an even number, wherein the starting positions of the two branch windings of each phase winding are adjacent poles, the starting point of the first branch winding is defined as 01, and the starting point of the second branch winding is defined as M, and the coil layers of the two branch windings have four intersections in two adjacent layers of winding, and two adjacent intersections of the four intersections span 6 pitches, 5 pitches, and 9 pitches respectively.

12. The continuous stator winding with crossed wiring according to claim 1, characterized in that: When using M-pole 2-branch winding for winding, both M and N are defined as even numbers.

13. The continuous stator winding with crossed wiring according to claim 12, characterized in that: When M poles and 2 branches are used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, the number of intersections of two adjacent layers of windings of the multiple coil layers of the two branch windings is different from the number of intersections of the other two adjacent layers of windings, the starting points of the first coil layer and the third coil layer are defined as 01, the starting points of the second coil layer and the fourth coil layer are defined as M, the windings of the first coil layer and the second coil layer have 2 intersections, and the windings of the third coil layer and the fourth coil layer have 1 intersection.

14. The continuous stator winding with crossed wiring according to claim 12, characterized in that: When M-pole 2 branches are used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, the number of intersections of two adjacent layers of the multiple coil layers of the two branch windings is the same as the number of intersections of the other two adjacent layers, but the positions of the intersections are staggered, the starting points of the first coil layer and the third coil layer are defined as 01, the starting points of the second coil layer and the fourth coil layer are defined as M, the windings of the first coil layer and the second coil layer have 2 intersections, the windings of the third coil layer and the fourth coil layer have 2 intersections, but the positions of the intersections of the windings of the first coil layer and the second coil layer and the intersections of the windings of the third coil layer and the fourth coil layer are staggered.

15. The continuous stator winding with crossed wiring according to claim 12, characterized in that: When M poles and 2 branches are used for winding, M and N are defined as even numbers, wherein the starting positions of the two branch windings are adjacent poles, the number of intersections of two layers of the multiple coil layers of the two branch windings is the same as the number of intersections of the other two adjacent layers, and the intersections are located at the same pole position, the starting point of the first coil layer and the third coil layer is defined as 01, the starting point of the second coil layer and the fourth coil layer is defined as M, the windings of the first coil layer and the second coil layer have 2 intersections, the windings of the third coil layer and the fourth coil layer have 2 intersections, and the intersection of the windings of the first coil layer and the second coil layer and the intersection of the windings of the third coil layer and the fourth coil layer are located at the same pole position.

16. The continuous stator winding with crossed wiring according to claim 2, characterized in that: When two adjacent coil layers in each phase winding have an odd number of intersections, it is defined that one of the winding layers in the two coil layers forming the intersection is located in the Pth layer, and the adjacent Pth layer and P-1th layer winding layers are the same branch winding, where P is an odd number.

17. The continuous stator winding with crossed wiring according to claim 2, characterized in that: When two adjacent coil layers in each phase winding have an even number of intersections, it is defined that one of the winding layers of the two coil layers forming the intersection is located in the Pth layer, and the adjacent Pth layer and P+1th layer winding layers are different branch windings, where P is an even number.

18. The continuous stator winding with crossed wiring according to claim 2, characterized in that: The number of slots corresponding to the branch windings located in the K-layer winding layer in each phase winding is the same, and K is an odd number.

19. A stator, characterized in that: include: A stator core and a continuous stator winding with cross-wires as claimed in any one of claims 1 to 18; The stator core has a plurality of slots formed in a radial inner surface of the stator core and spaced apart in a circumferential direction of the stator core; the stator winding is mounted on the stator core.

20. A motor, characterized in that: include: A rotor and a stator as claimed in claim 19; The rotor is rotatable relative to the stator.

Images