Electromagnetic wire layout structure and method and brushless doubly-fed motor applying layout

Abstract

The invention relates to the technical field of electromagnetic wire layout of brushless doubly-fed motors, and discloses an electromagnetic wire layout structure and method and a brushless doubly-fed motor applying the layout, the electromagnetic wire layout structure comprises a first stator winding which is a 72-slot 2-pole three-phase stator winding, the first stator winding comprises three branches which are respectively connected with UVW three phases, and each branch is provided with 12 coils; the second stator winding is a 72-slot 6-pole three-phase stator winding, the second stator winding comprises three branches which are respectively connected with UVW three phases, and each branch is provided with 24 coils; the first stator winding and the second stator winding are in star connection. The electromagnetic wire layout structure of the first stator winding, the second stator winding and the rotor winding is obtained by performing analogue simulation on the motor and correcting the electromagnetic wire layout structure according to the analogue simulation result, so that the performance of the motor can be ensured, the production requirement of the motor can be met, and the assembly of the electromagnetic wire is more suitable for mechanical production when the motor is produced.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic wire layout technology for brushless doubly fed motors, and more specifically, to an electromagnetic wire layout structure, method, and a brushless doubly fed motor using the layout. Background Technology

[0002] The stator of a brushless doubly-fed motor is equipped with two sets of windings with different pole numbers: a power winding and a control winding. The rotor adopts a squirrel-cage or reluctance type structure. Electromagnetic wires need to be arranged in the slots of the stator and rotor. In existing technologies, when copper busbars are used for the electromagnetic wires, after the copper busbars are placed in the slots of the stator or rotor, they need to be connected according to a pre-designed wiring diagram to form a complete closed magnetic circuit. To meet motor performance requirements, the arrangement and layout of the copper busbars are usually irregular. This causes problems during motor production and assembly. For example, an unreasonable layout of the copper busbars can obstruct installation in the slots, or an irregular arrangement can make welding between the copper busbars inconvenient. This necessitates adjustments during assembly, affecting motor production efficiency.

[0003] Therefore, it is necessary to propose an electromagnetic wire layout structure, method, and a brushless doubly fed motor using this layout, in order to at least partially solve the problems existing in the prior art. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides an electromagnetic wire layout structure, comprising: a first stator winding, which is a 72-slot 2-pole three-phase stator winding, the first stator winding comprising three branches respectively connected to the three phases UVW, each branch having 12 coils; The second stator winding is a 72-slot, 6-pole, three-phase stator winding. The second stator winding includes three branches that are respectively connected to the three phases UVW, and each branch has 24 coils. Both the first stator winding and the second stator winding are connected in a star configuration.

[0006] Preferably, the three branches of the first stator winding include: The first branch A, which is connected to U, has 12 coils with corresponding slot numbers 1, 3, 5, 7, 9, 11, 47, 45, 43, 41, 39, 37. The second branch A, which is connected to V, has 12 coils with corresponding slot numbers 25, 27, 29, 31, 33, 35, 71, 69, 67, 65, 63, 61; The third branch A, which is connected to W, has 12 coils with corresponding slot numbers 49, 51, 53, 55, 57, 59, 23, 21, 19, 17, 15, 13. Coil number 37 is connected to coils numbered 61 and 13 respectively; The coil span is 29. The meaning of the slot number is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a span of 29.

[0007] Preferably, each branch of the second stator winding has 6 coil groups, and each coil group has 4 coils; the three branches of the second stator winding include: The first branch B, which is connected to U, has the following coil slot numbers in its six coil groups: Group 1: 1, 2, 3, 4; Group 2: 13, 14, 15, 16; Group 3: 25, 26, 27, 28; Group 4: 37, 38, 39, 40; Group 5: 49, 50, 51, 52; Group 6: 61, 62, 63, 64. The second branch B, which is connected to phase V, has the following coil slot numbers in its six coil groups: Group 1: 9, 10, 11, 12; Group 2: 21, 22, 23, 24; Group 3: 33, 34, 35, 36; Group 4: 45, 46, 47, 48; Group 5: 57, 58, 59, 60; Group 6: 69, 70, 71, 72. The third branch B, which is connected to W, has the following coil slot numbers in its six coil groups: Group 1: 17, 18, 19, 20; Group 2: 29, 30, 31, 32; Group 3: 41, 42, 43, 44; Group 4: 53, 54, 55, 56; Group 5: 65, 66, 67, 68; Group 6: 5, 6, 7, 8. The coil span is 10. The meaning of the slot number is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a span of 10.

[0008] Preferably, in the first branch B, coil numbered 1 is connected to U, coils numbered 4 and 16 are connected, coils numbered 13 and 25 are connected, coils numbered 28 and 40 are connected, coils numbered 37 and 49 are connected, and coils numbered 52 and 64 are connected. In the second branch B, coil number 9 is connected to phase V, coils numbered 12 and 24 are connected, coils numbered 21 and 33 are connected, coils numbered 36 and 48 are connected, coils numbered 45 and 57 are connected, and coils numbered 60 and 72 are connected. In the third branch B, coil number 17 is connected to W, coils numbered 20 and 32 are connected, coils numbered 29 and 41 are connected, coils numbered 44 and 56 are connected, coils numbered 53 and 65 are connected, and coils numbered 68 and 8 are connected. Among them, coil number 61 is connected to coils numbered 69 and 5 respectively.

[0009] Preferably, in the first branch B, coils numbered 1 and 40 are connected to U, coils numbered 4 and 16 are connected, coils numbered 13 and 25 are connected, coils numbered 37 and 49 are connected, and coils numbered 52 and 64 are connected. In the second branch B, coils numbered 9 and 48 are connected to phase V respectively, coils numbered 12 and 24 are connected, coils numbered 21 and 33 are connected, coils numbered 45 and 57 are connected, and coils numbered 60 and 72 are connected. In the third branch B, coils numbered 17 and 56 are connected to W respectively, coils numbered 20 and 32 are connected, coils numbered 29 and 41 are connected, coils numbered 53 and 65 are connected, and coils numbered 68 and 8 are connected. Coil number 28 is connected to coils numbered 36 and 44 respectively; Coil number 61 is connected to coils numbered 69 and 5 respectively.

[0010] Preferably, it also includes: a rotor winding with 96 slots, comprising four parallel branches, each branch having the same number of coils.

[0011] Preferably, each branch of the rotor winding has two coil groups connected in series, and each coil group has eight coils; the four parallel branches of the rotor winding include: In the first branch C, the coils in the two coil groups are numbered as follows: Group 1: 7, 8, 10, 11, 36, 37, 38, 41, with a coil span of 16; a coil is also connected in series in the first group, corresponding to slot number 71, with a span of 17; Group 2: 8, 9, 10, 11, 12, 13, 14, 15, with a coil span of 40; a coil is also connected in series in the second group, corresponding to slot number 15, with a span of 34. In the second branch C, the coils in the two coil groups are numbered as follows: Group 1: 55, 56, 58, 59, 84, 85, 86, 89, with a coil span of 16; a coil is also connected in series in Group 1, with a corresponding slot number of 23 and a span of 17; Group 2: 56, 57, 58, 59, 60, 61, 62, 63, with a coil span of 40; a coil is also connected in series in Group 2, with a corresponding slot number of 63 and a span of 34. The third branch C has two coil groups with the following slot numbers: Group 1: 31, 32, 34, 35, 60, 61, 62, 65, with a coil span of 16; Group 1 also has a coil connected in series with slot number 95, with a span of 17; Group 2: 32, 33, 34, 35, 36, 37, 38, 39, with a coil span of 40; Group 2 also has a coil connected in series with slot number 39, with a span of 34. The fourth branch C has two coil groups with the following slot numbers: Group 1: 79, 80, 82, 83, 12, 13, 14, 17, with a coil span of 16; Group 1 also has a coil connected in series with slot number 47, with a span of 17; Group 2: 80, 81, 82, 83, 84, 85, 86, 87, with a coil span of 40; Group 2 also has a coil connected in series with slot number 87, with a span of 34. The meaning of the slot number corresponding to the coil is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a specified span.

[0012] Preferably, each branch of the rotor winding has three coil groups connected in series; the four parallel branches of the rotor winding include: The first branch D has the following coil slot numbers in its three coil groups: Group 1: 6, 7, 8, 9, 10, with a coil span of 14; Group 2: 6, 7, 8, 9, 10, 11, 12, 13, 14, with a coil span of 39; Group 3: 35, 36, 37, 38, 39, with a coil span of 14. The second branch D has the following coil slot numbers in its three coil groups: Group 1: 54, 55, 56, 57, 58, with a coil span of 14; Group 2: 54, 55, 56, 57, 58, 59, 60, 61, 62, with a coil span of 39; Group 3: 83, 84, 85, 86, 87, with a coil span of 14. The third branch D has the following coil slot numbers in its three coil groups: Group 1: 30, 31, 32, 33, 34, with a coil span of 14; Group 2: 30, 31, 32, 33, 34, 35, 36, 37, 38, with a coil span of 39; Group 3: 59, 60, 61, 62, 63, with a coil span of 14. The fourth branch D has the following coil slot numbers in its three coil groups: Group 1: 78, 79, 80, 81, 82, with a coil span of 14; Group 2: 78, 79, 80, 81, 82, 83, 84, 85, 86, with a coil span of 39; Group 3: 11, 12, 13, 14, 15, with a coil span of 14. The meaning of the slot number corresponding to the coil is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a specified span.

[0013] An electromagnetic wire layout method, comprising: Based on the production requirements of the motor, design the initial layout structure of the electromagnetic wire; The motor is simulated based on the initial layout structure of the electromagnetic wires, and the initial layout structure of the electromagnetic wires is modified based on the simulation results until the simulation results meet the production requirements of the motor, thus obtaining the modified electromagnetic wire layout structure. Based on the revised electromagnetic wire layout structure, draw the wiring diagrams for the first stator winding, the second stator winding, and the rotor winding.

[0014] A brushless doubly fed motor includes a power winding and a control winding, wherein the power winding is a first stator winding and the control winding is a second stator winding.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The electromagnetic wire layout structure, method, and brushless doubly fed motor using the layout described in this invention, including the electromagnetic wire layout structure of the first stator winding, the second stator winding, and the rotor winding, are obtained by simulating the motor and modifying the electromagnetic wire layout structure based on the simulation results. This ensures that the obtained electromagnetic wire layout structure can guarantee the performance of the motor, meet the production requirements of the motor, and make the assembly of the electromagnetic wires more suitable for mechanized production during motor manufacturing.

[0016] The present invention provides an electromagnetic wire layout structure, method, and a brushless doubly fed motor using this layout. Other advantages, objectives, and features of the present invention will be partly apparent from the following description and partly understood by those skilled in the art through study and practice of the invention. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the electromagnetic wire layout of the first stator winding in the electromagnetic wire layout structure described in this invention. Figure 2 This is a schematic diagram of the first electromagnetic wire layout of the second stator winding in the electromagnetic wire layout structure described in this invention. Figure 3 This is a schematic diagram of the first electromagnetic wire layout of the rotor winding in the electromagnetic wire layout structure described in this invention. Figure 4 This is a schematic diagram of a second electromagnetic wire layout for the second stator winding in the electromagnetic wire layout structure described in this invention. Figure 5 This is a schematic diagram of the second electromagnetic wire layout of the rotor winding in the electromagnetic wire layout structure described in this invention; Figure 6 This is a schematic diagram illustrating the principle of the brushless doubly fed motor described in this invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0019] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0020] like Figure 1 , Figure 2 and Figure 4 As shown, the present invention provides an electromagnetic wire layout structure, including: a first stator winding, which is a 72-slot 2-pole three-phase stator winding, the first stator winding including three branches respectively connected to the three phases UVW, each branch having 12 coils; The second stator winding is a 72-slot, 6-pole, three-phase stator winding. The second stator winding includes three branches that are respectively connected to the three phases UVW, and each branch has 24 coils. Both the first stator winding and the second stator winding are connected in a star configuration.

[0021] Among them, UVW represent the terminals of the three branches respectively.

[0022] Both the first and second stator windings have 72 slots, referring to the number of slots used to place electromagnetic wires; the first stator winding has 2 poles and the second stator winding has 6 poles, referring to the total number of magnetic poles in the stator magnetic field; the three branches of the first stator winding are connected to the three phases U, V, and W respectively, and the three branches of the second stator winding are also connected to the three phases U, V, and W respectively, with U, V, and W connecting to three different phases, each with a phase difference of 120 degrees; The first stator winding has 36 coils and the second stator winding has 72 coils. The electromagnetic wire layout structure of the first and second stator windings is obtained by simulating the motor and modifying the electromagnetic wire layout structure based on the simulation results. This ensures that the obtained electromagnetic wire layout structure can guarantee the performance of the motor, meet the production requirements of the motor, and make the assembly of the electromagnetic wires more suitable for mechanized production during motor manufacturing.

[0023] like Figure 1 As shown, in one embodiment, the three branches of the first stator winding include: The first branch A, which is connected to U, has 12 coils with corresponding slot numbers 1, 3, 5, 7, 9, 11, 47, 45, 43, 41, 39, 37. The second branch A, which is connected to V, has 12 coils with corresponding slot numbers 25, 27, 29, 31, 33, 35, 71, 69, 67, 65, 63, 61; The third branch A, which is connected to W, has 12 coils with corresponding slot numbers 49, 51, 53, 55, 57, 59, 23, 21, 19, 17, 15, 13. Coil number 37 is connected to coils numbered 61 and 13 respectively.

[0024] The three branches of the first stator winding are connected in a star configuration; The coil numbered 1 in slot is connected to phase U (i.e. Figure 1 In U2), the coil numbered 25 in slot is connected to phase V (i.e. Figure 1 In V2), the coil with slot number 49 is connected to W (i.e. Figure 1 (W2 in the middle). All coils on the first branch A are connected in series, all coils on the second branch A are connected in series, all coils on the third branch A are connected in series, and coil numbered 37 is connected to coils numbered 61 and 13 respectively. The coil span is 29. The meaning of the slot number is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a span of 29.

[0025] For example, the number of slot 1 corresponding to the coil means that the electromagnetic wire in slot 1 is connected to the electromagnetic wire in slot 30 to form coil 1-30 with a span of 29.

[0026] The following are two electromagnetic wire layout structures for the second stator winding: like Figure 2The diagram shows a first electromagnetic wire layout structure for the second stator winding. Each branch of the second stator winding has six coil groups, and each coil group has four coils. The three branches of the second stator winding include: Connected to U (i.e.) Figure 2 In the first branch B of U6), the slot numbers of the coils in the six coil groups are as follows: Group 1: 1, 2, 3, 4; Group 2: 13, 14, 15, 16; Group 3: 25, 26, 27, 28; Group 4: 37, 38, 39, 40; Group 5: 49, 50, 51, 52; Group 6: 61, 62, 63, 64. Connected to V (i.e.) Figure 2 The second branch B of V6 has six coil groups with the coils numbered as follows: Group 1: 9, 10, 11, 12; Group 2: 21, 22, 23, 24; Group 3: 33, 34, 35, 36; Group 4: 45, 46, 47, 48; Group 5: 57, 58, 59, 60; Group 6: 69, 70, 71, 72. Connected to W (i.e.) Figure 2 In the third branch B of W6), the slot numbers of the coils in the six coil groups are as follows: Group 1: 17, 18, 19, 20; Group 2: 29, 30, 31, 32; Group 3: 41, 42, 43, 44; Group 4: 53, 54, 55, 56; Group 5: 65, 66, 67, 68; Group 6: 5, 6, 7, 8.

[0027] In each of the above coil groups, the four coils are connected in series.

[0028] Furthermore, the three branches of the aforementioned second stator winding are connected in a star configuration; In the first branch B, the coil numbered 1 is connected to U (i.e., Figure 2 (U6), coil connections numbered 4 and 16, coil connections numbered 13 and 25, coil connections numbered 28 and 40, coil connections numbered 37 and 49, and coil connections numbered 52 and 64; In the second branch B, the coil numbered 9 is connected to phase V (i.e., Figure 2 (V6), coil connections numbered 12 and 24, coil connections numbered 21 and 33, coil connections numbered 36 and 48, coil connections numbered 45 and 57, coil connections numbered 60 and 72; In the third branch B, coil numbered 17 is connected to W (i.e. Figure 2 (W6), coil connections numbered 20 and 32, coil connections numbered 29 and 41, coil connections numbered 44 and 56, coil connections numbered 53 and 65, and coil connections numbered 68 and 8; Among them, coil number 61 is connected to coils numbered 69 and 5 respectively.

[0029] The coil span is 10. The meaning of the slot number is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a span of 10.

[0030] For example, if the slot number corresponding to the coil is 1, it means that the electromagnetic wire in slot 1 is connected to the electromagnetic wire in slot 11 to form coil 1-11 with a span of 10; if the slot number corresponding to the coil is 11, it means that the electromagnetic wire in slot 11 is connected to the electromagnetic wire in slot 21 to form coil 11-21 with a span of 10. It should be noted that the electromagnetic wire in slot 11 of coils 1-11 and the electromagnetic wire in slot 11 of coils 11-21 are located in different layers.

[0031] When the second stator winding mentioned above is used in conjunction with the first stator winding in the aforementioned embodiment, the first stator winding is used to connect to 10KV high voltage, and the second stator winding is used to connect to 400V low voltage. The first stator winding is a single layer with a coil span of 29 and a total of 36 coils; The second stator winding is double-layered with a coil span of 10 and a total of 72 coils.

[0032] like Figure 4 The diagram shows a second electromagnetic wire layout structure for the second stator winding. Each branch of the second stator winding has six coil groups, and each coil group has four coils. The three branches of the second stator winding include: Connected to U (i.e.) Figure 4 The first branch B of U6 contains two sub-branches. The coil slot numbers in the three coil groups of the first sub-branches are as follows: Group 1: 1, 2, 3, 4; Group 2: 13, 14, 15, 16; Group 3: 25, 26, 27, 28. The coil slot numbers in the three coil groups of the second sub-branches are as follows: Group 4: 37, 38, 39, 40; Group 5: 49, 50, 51, 52; Group 6: 61, 62, 63, 64. Connected to V (i.e.) Figure 4 The second branch B of V6 contains two sub-branches. The coil slot numbers in the three coil groups of the first sub-branches are as follows: Group 1: 9, 10, 11, 12; Group 2: 21, 22, 23, 24; Group 3: 33, 34, 35, 36. The coil slot numbers in the three coil groups of the second sub-branches are as follows: Group 4: 45, 46, 47, 48; Group 5: 57, 58, 59, 60; Group 6: 69, 70, 71, 72. Connected to W (i.e.) Figure 4 The third branch B of W6 contains two sub-branches. The coil slot numbers in the three coil groups of the first sub-branches are as follows: Group 1: 17, 18, 19, 20; Group 2: 29, 30, 31, 32; Group 3: 41, 42, 43, 44. The coil slot numbers in the three coil groups of the second sub-branches are as follows: Group 4: 53, 54, 55, 56; Group 5: 65, 66, 67, 68; Group 6: 5, 6, 7, 8.

[0033] In each of the above coil groups, the four coils are connected in series.

[0034] Furthermore, in the three branches of the second stator winding, each branch is divided into two sub-branches that are connected to UVW respectively, and they adopt a parallel connection of two star connections. In the first branch B, coils numbered 1 and 40 are connected to phase U respectively (i.e. Figure 4 (U6), coil connections numbered 4 and 16, coil connections numbered 13 and 25, coil connections numbered 37 and 49, coil connections numbered 52 and 64; In the second branch B, coils numbered 9 and 48 are connected to phase V respectively (i.e., Figure 4 (V6), coil connections numbered 12 and 24, coil connections numbered 21 and 33, coil connections numbered 45 and 57, coil connections numbered 60 and 72; In the third branch B, coils numbered 17 and 56 are connected to W respectively (i.e. Figure 4 (W6), coil connections numbered 20 and 32, coil connections numbered 29 and 41, coil connections numbered 53 and 65, coil connections numbered 68 and 8; Coil number 28 is connected to coils numbered 36 and 44 respectively; Coil number 61 is connected to coils numbered 69 and 5 respectively.

[0035] The coil span is 10. The meaning of the slot number is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a span of 10.

[0036] For example, if the slot number corresponding to the coil is 1, it means that the electromagnetic wire in slot 1 is connected to the electromagnetic wire in slot 11 to form coil 1-11 with a span of 10; if the slot number corresponding to the coil is 11, it means that the electromagnetic wire in slot 11 is connected to the electromagnetic wire in slot 21 to form coil 11-21 with a span of 10. It should be noted that the electromagnetic wire in slot 11 of coils 1-11 and the electromagnetic wire in slot 11 of coils 11-21 are located in different layers.

[0037] When the second stator winding is used in conjunction with the first stator winding in the aforementioned embodiment, the first stator winding is used to connect to 6KV high voltage, and the second stator winding is used to connect to 400V low voltage. The first stator winding has a coil span of 29 and a total of 36 coils; The second stator winding has a coil span of 10 and a total of 72 coils.

[0038] In one embodiment, the rotor winding 300 with 96 slots includes four parallel branches, each branch having the same number of coils.

[0039] The electromagnetic wire layout structure of the rotor winding 300 was also obtained by simulating the motor and modifying the electromagnetic wire layout structure based on the simulation results. The following are two electromagnetic wire layout structures of the rotor winding 300: like Figure 3 The diagram shows a first electromagnetic wire layout structure for the rotor winding 300. Each branch of the rotor winding 300 has two coil groups connected in series, each coil group having eight coils connected in series. The four parallel branches of the rotor winding 300 include: In the first branch C, the coils in the two coil groups are numbered as follows: Group 1: 7, 8, 10, 11, 36, 37, 38, 41, with a coil span of 16; a coil is also connected in series in the first group, corresponding to slot number 71, with a span of 17; Group 2: 8, 9, 10, 11, 12, 13, 14, 15, with a coil span of 40; a coil is also connected in series in the second group, corresponding to slot number 15, with a span of 34. In the second branch C, the coils in the two coil groups are numbered as follows: Group 1: 55, 56, 58, 59, 84, 85, 86, 89, with a coil span of 16; a coil is also connected in series in Group 1, with a corresponding slot number of 23 and a span of 17; Group 2: 56, 57, 58, 59, 60, 61, 62, 63, with a coil span of 40; a coil is also connected in series in Group 2, with a corresponding slot number of 63 and a span of 34. The third branch C has two coil groups with the following slot numbers: Group 1: 31, 32, 34, 35, 60, 61, 62, 65, with a coil span of 16; Group 1 also has a coil connected in series with slot number 95, with a span of 17; Group 2: 32, 33, 34, 35, 36, 37, 38, 39, with a coil span of 40; Group 2 also has a coil connected in series with slot number 39, with a span of 34. The fourth branch C has two coil groups with the following slot numbers: Group 1: 79, 80, 82, 83, 12, 13, 14, 17, with a coil span of 16; Group 1 also has a coil connected in series with slot number 47, with a span of 17; Group 2: 80, 81, 82, 83, 84, 85, 86, 87, with a coil span of 40; Group 2 also has a coil connected in series with slot number 87, with a span of 34. The meaning of the slot number corresponding to the coil is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a specified span.

[0040] like Figure 3 As shown, the rotor windings are assembled in the following order: First, in the slot corresponding to the single-dotted-line frame, with a span of 40, place the electromagnetic wire in the corresponding slot, then place the electromagnetic wire in the slot with this number; then, in the slot corresponding to the single-dashed-line frame, with a span of 16, place the electromagnetic wire in the corresponding slot, then place the electromagnetic wire in the slot with this number; then, in the slot corresponding to the double-dotted-line frame, with a span of 34, place the electromagnetic wire in the corresponding slot, then place the electromagnetic wire in the slot with this number; finally, in the slot corresponding to the double-dashed-line frame, with a span of 17, place the electromagnetic wire in the corresponding slot, then place the electromagnetic wire in the slot with this number; then... Figure 3 The connection method shown connects the electromagnetic wires, and the electromagnetic wires in the slots numbered in the double dashed boxes and the electromagnetic wires in the slots corresponding to the spans numbered in the double dotted-dash boxes are connected to the short-circuit ring to form a complete and closed electromagnetic circuit.

[0041] Taking the first branch C as an example, the slots corresponding to the single-dot dashed frame are numbered 8, 9, 10, 11, 12, 13, 14, 15. Electromagnetic wires are placed with a span of 40 (for example, the electromagnetic wire in slot 8 corresponds to slot number 48, so the electromagnetic wire is placed in slot 48 first, and then in slot 8). The slots corresponding to the single dashed frame are numbered 7, 8, 10, 11, 36, 37, 38, 41. Electromagnetic wires are placed with a span of 16 (for example, the electromagnetic wire in slot 7 corresponds to slot number 23, so the electromagnetic wire is placed in slot 23 first). Place the electromagnetic wire in slot 1, then place the electromagnetic wire in slot 7; the slot corresponding to the double-dotted box is number 15, place the electromagnetic wire with a span of 34 (for example, the electromagnetic wire in slot 15 has a corresponding slot number of 49, so place the electromagnetic wire in slot 49 first, then place the electromagnetic wire in slot 15); the slot corresponding to the double-dashed box is number 71, place the electromagnetic wire with a span of 17 (for example, the electromagnetic wire in slot 71 has a corresponding slot number of 88, so place the electromagnetic wire in slot 88 first, then place the electromagnetic wire in slot 71).

[0042] It should be noted that, Figure 3 The diagram shows the four main coil groups, or four branches, of the entire rotor winding 300. All the numbers represent coils. For example, the span within the single dashed box containing coil number 7 is 16. The "7" indicates that the electromagnetic wire in slot 7 is connected to the electromagnetic wire in slot 23, i.e., 7-23, where 7 and 23 form a coil. Taking the main coil group starting with coil number 71, i.e., the first branch C, as an example, coil number 71 represents coils 71-88. The electromagnetic wire in slot 71 is connected to a short-circuit ring, and the electromagnetic wire in slot 88 is connected to coil number 7. The electromagnetic wires in subsequent slots are connected in the same way. In coils 15-49, where the electromagnetic wire in slot 15 is located, the electromagnetic wire in slot 49 is connected to a short-circuit ring. Thus, the main coil group of the first branch C forms a large loop. The main coil groups corresponding to the second, third, and fourth branches C are similar, and will not be elaborated further here.

[0043] When the aforementioned rotor winding is used in conjunction with the first electromagnetic wire layout structure of the first stator winding and the second stator winding in the aforementioned embodiments, the present invention provides the following main performance parameters of a brushless doubly-fed motor (the main performance parameters of the brushless doubly-fed motor can be selected and adjusted according to actual conditions): 3 phases, rated frequency of 50Hz, 2 poles and 6 poles, rated voltage of 6kV, rated power of 220kW, rated power of the 2-pole winding of 110kW, rated current of the 2-pole winding of 7.6A, current density of the 2-pole stator winding of 3.8, rated power of the 6-pole winding of 110kW, rated current of the 6-pole winding of 81A, rated voltage of the 6-pole winding of 380V, locked-rotor open-circuit voltage of the 6-pole winding of 1050V, current density of the 6-pole stator winding of 3.5, speed range of 750-1000 rpm, and average efficiency of 94.2%.

[0044] It is evident that the electromagnetic wire layout structure of the two stators and one rotor obtained through simulation can achieve the aforementioned performance of the brushless doubly fed motor. Furthermore, the arrangement of the electromagnetic wires is reasonable, facilitating the mechanized production of the motor.

[0045] The present invention also provides a wiring example of the first electromagnetic wire layout structure rotor, as follows: The electromagnetic wires of the rotor are arranged in four layers. The first layer is arranged first and is located at the bottom layer. The fourth layer is arranged last and is located at the top layer.

[0046] The slots for installing the first layer of magnet wires are: 48→55, 96→7, 72→79, 24→31 (the arrows indicate the destinations, for example, 48→55 means that the slots for installing the magnet wires are from slot 48 to slot 55). The slots for installing the electromagnetic wires in the second layer are: 8→15, 56→63, 32→39, 80→87; The non-terminal wiring of the first and second layers (this indicates which two slots the electromagnetic wires are connected to, for example, 96-56 means that the non-terminals of the electromagnetic wires in slots 96 and 56 are connected) is shown in the table below: The wiring connections for the first and second layers are shown in the table below: Note: After the electromagnetic wires of the first and second layers are connected, four coil groups are formed. Each coil group has two electromagnetic wires at both ends. A total of eight electromagnetic wires are left empty in the four coils. At this time, no other electromagnetic wires are connected and they are marked as "empty". The empty electromagnetic wires are 7, 8, 31, 32, 55, 56, 79, and 80. The four coil groups are as follows: Group 1: 96→7, 56→63; Group 2: 72→79, 32→39; Group 3: 48→55, 8→15; Group 4: 24→31, 80→87. It should be noted that each slot's electromagnetic wire has a non-connected terminal and a connected terminal, used to describe a certain end of the rotor. The non-connected terminal refers to the bearing end, which is used to connect to target equipment such as water pumps and fans. The connected terminal refers to the non-bearing end, which is shorter than the bearing end and is not connected to the target equipment. The third layer of slots for installing electromagnetic wires is as follows: Non-connection terminals: 95→6, 23→30, 47→54, 71→78; Terminal block: 95→7, 23→31, 47→55, 71→79; The slots for the electromagnetic wires installed on the fourth layer are as follows: Non-connection terminals: 7→17, 31→41, 55→65, 79→89; Terminals: 8→17, 32→41, 56→65, 80→89; The non-terminal wiring of the third and fourth layers is shown in the table below (in the table, ↓ represents the lower layer electromagnetic wire and ↑ represents the upper layer electromagnetic wire): Note: 15-49, 39-73, 63-1, and 87-25 are jumpers of the same level for the third and fourth layers without terminals; The wiring for the third and fourth layers is shown in the table below (in the table, ↓ represents the lower layer electromagnetic wire and ↑ represents the upper layer electromagnetic wire): Note: 17-30, 41-54, 65-78, and 89-6 are jumpers of the same level for the third and fourth layer terminals; the "empty" slot is the electromagnetic wire that has not been connected in this step. Empty slots (here, empty slots refer to the entire rotor's empty slots, with no electromagnetic wires in either the upper or lower layers. Insulating sheets are installed in the slots, and then they are fixed with slot wedges): 18→22, 42→46, 66→70, 90→94. First and fourth level jumpers: 63-7, 39-79, 87-31, 15-55; Second and third level jumpers: 80-33, 8-57, 32-81, 56-9; Shorting copper ring: [73, 71], [95, 1], [49, 47], [25, 23]. The two electromagnetic wires in parentheses form a group. The four groups of electromagnetic wires are soldered onto the same round copper ring for shorting.

[0047] like Figure 5 The diagram shows a second electromagnetic wire layout structure for the rotor winding 300, where each branch of the rotor winding 300 has three coil groups connected in series; the four parallel branches of the rotor winding 300 include: The first branch D has the following coil slot numbers in its three coil groups: Group 1: 6, 7, 8, 9, 10, with a coil span of 14; Group 2: 6, 7, 8, 9, 10, 11, 12, 13, 14, with a coil span of 39; Group 3: 35, 36, 37, 38, 39, with a coil span of 14. The second branch D has the following coil slot numbers in its three coil groups: Group 1: 54, 55, 56, 57, 58, with a coil span of 14; Group 2: 54, 55, 56, 57, 58, 59, 60, 61, 62, with a coil span of 39; Group 3: 83, 84, 85, 86, 87, with a coil span of 14. The third branch D has the following coil slot numbers in its three coil groups: Group 1: 30, 31, 32, 33, 34, with a coil span of 14; Group 2: 30, 31, 32, 33, 34, 35, 36, 37, 38, with a coil span of 39; Group 3: 59, 60, 61, 62, 63, with a coil span of 14. The fourth branch D has the following coil slot numbers in its three coil groups: Group 1: 78, 79, 80, 81, 82, with a coil span of 14; Group 2: 78, 79, 80, 81, 82, 83, 84, 85, 86, with a coil span of 39; Group 3: 11, 12, 13, 14, 15, with a coil span of 14. The meaning of the slot number corresponding to the coil is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a specified span.

[0048] In each coil group, multiple coils are connected in series.

[0049] like Figure 5As shown, the rotor windings are assembled in the following order: Electromagnetic wire (i.e., coil) is placed in the slot corresponding to the single-dotted box with a span of 39; then, electromagnetic wire is placed in the slot within the single-dashed box with a span of 14; according to... Figure 5 The wiring method shown connects the electromagnetic wires, thus forming a complete closed rotor electromagnetic circuit.

[0050] Taking the first branch D as an example, the slots corresponding to the single-dot dashed frame are numbered 6, 7, 8, 9, 10, 11, 12, 13, 14, and the electromagnetic wires are placed with a span of 39; the slots in the single dashed frame are numbered 6, 7, 8, 9, 10, 35, 36, 37, 38, 39, and the electromagnetic wires are placed with a span of 14.

[0051] It should be noted that, Figure 5 Each number in the diagram represents a coil. For example, in the first branch D, the span within the single dashed box containing number 6 is 14. Therefore, "6" represents the connection between the electromagnetic wire in slot 6 and the electromagnetic wire in slot 20, forming coil 6-20. The electromagnetic wire in slot 6 is connected to a shorting ring, and the electromagnetic wire in slot 20 is connected to the electromagnetic wire in slot 7. The electromagnetic wires in subsequent slots are connected in the same way. The last number, 39, represents the connection between the electromagnetic wire in slot 39 and the electromagnetic wire in slot 53, forming coil 39-53. The electromagnetic wire in slot 53 is connected to a shorting ring, forming a complete circuit. The second, third, and fourth branches D are connected in the same way, which will not be elaborated here.

[0052] When the above-mentioned rotor winding is used in conjunction with the second electromagnetic wire layout structure of the first stator winding and the second stator winding in the aforementioned embodiments, the main performance parameters of the brushless doubly-fed motor are as follows: number of phases: 3-phase; rated frequency: 50Hz; number of poles: 2-pole and 6-pole; rated voltage: 6kV; rated power: 710kW; rated power of the 2-pole winding: 534kW; rated current of the 2-pole winding: 56.6A; current density of the 2-pole stator winding: 3.52; rated power of the 6-pole winding: 176kW; rated current of the 6-pole winding: 370A; rated voltage of the 6-pole winding: 380V; locked-rotor open-circuit voltage of the 6-pole winding: 1000V; current density of the 6-pole stator winding: 3.2; speed range: 750-1000 rpm; average efficiency: 94.7%.

[0053] It is evident that the electromagnetic wire layout structure of the two stators and one rotor obtained through simulation can achieve the aforementioned performance of the brushless doubly fed motor. Furthermore, the arrangement of the electromagnetic wires is reasonable, facilitating the mechanized production of the motor.

[0054] The present invention also provides a wiring example of a second electromagnetic wire layout structure, as detailed below: Small coils: In the table below, each column contains 10 coils as a large group, each large group has two small groups, and each small group has 5 coils; The non-connection terminals of the small coil are connected as shown in the table below: The wiring connections for the small coil are shown in the table below: Note: "Short" in the table refers to shorting; The bridging wire connecting the large coil to the small coil is: 5-83, 6-24, 29-11, 30-48; 53-35, 54-72, 77-59, 78-96; Small coil short-circuit ring: [5, 6], [29, 30], [53, 54], [77, 78]; Explanation: The two electromagnetic wires in parentheses are a group, and the four groups of electromagnetic wires are welded to the same round copper ring for short-circuiting; Since the rotor of the motor is a closed circuit, short-circuit rings are needed to achieve the purpose of closure on some electromagnetic wires that need to be connected. Since there are many electromagnetic wires that need to be short-circuited and they are evenly distributed (4 groups of adjacent electromagnetic wires), the short-circuit electromagnetic wires are designed in a ring shape.

[0055] Large coils: 4 sets in total, 9 coils in each set; The non-connection terminals of the large coil are connected as shown in the table below: The wiring of the large coil terminals is shown in the table below: Note: 78, 6, 30, and 54 are bridging wires; there are a total of 4 coil groups (each column is one group): in the first group, 78 is the head and 29 is the tail, connected in series with the small coil; the other three groups are the same. Empty slots (here, empty slots refer to the entire rotor's empty slots, with no electromagnetic wires in either the upper or lower layers. Insulating sheets are installed in the slots, and then they are fixed with slot wedges): 16→19, 40→43, 64→67, 88→91.

[0056] The present invention also provides a method for laying out electromagnetic lines, comprising: Based on the production requirements of the motor, design the initial layout structure of the electromagnetic wire; The motor is simulated based on the initial layout structure of the electromagnetic wires, and the initial layout structure of the electromagnetic wires is modified based on the simulation results until the simulation results meet the production requirements of the motor, thus obtaining the modified electromagnetic wire layout structure. Based on the revised electromagnetic wire layout structure, draw the wiring diagrams for the first stator winding, the second stator winding, and the rotor winding 300.

[0057] The production requirements for motors include power factor, efficiency, and torque.

[0058] In one embodiment, the simulation includes electromagnetic field simulation, structural mechanics simulation, and thermal simulation. A motor model is established based on the initial layout structure of the electromagnetic wires, variables and boundary conditions are set, and the output simulation results include, but are not limited to, power factor, efficiency, torque, and torque. Then, it is determined whether the simulation results meet the production requirements of the motor (i.e., the set power factor, efficiency, and torque, etc.). If not, the initial layout structure of the electromagnetic wires needs to be modified until the simulation results meet the production requirements of the motor.

[0059] The electromagnetic field simulation analysis includes: Motor spatial magnetic flux density distribution and air gap magnetic flux density distribution: Establish a simulation model of the motor electromagnetic field to obtain the three-dimensional magnetic flux density distribution in the stator and rotor slots, providing a correction reference for the design of the initial layout structure of the electromagnetic wires; Dynamic magnetic field effect of motor: The dynamic coupling relationship between the magnetic field and the current field when the motor starts and the load changes can be analyzed by time-domain simulation to understand the dynamic characteristics of the motor. Winding impedance parameter extraction: The inductance and resistance of the windings can be obtained through simulation, providing a basis for motor performance calculation; Motor energy loss analysis: Calculation of iron loss, copper loss and eddy current loss, analysis of the ratio of energy lost to input energy, which can reflect the energy conversion efficiency of the motor; Electromagnetic force or torque of motor: By simulating and analyzing the electromagnetic force on each component of the stator and rotor, as well as the driving torque on the rotor, a corrective reference is provided for the design of the initial layout structure of the electromagnetic wire.

[0060] Structural mechanics simulation analysis includes: Stress analysis and structural optimization: Under the action of electromagnetic force, the stator and rotor will generate stress and deformation to different degrees. The strength analysis of the stator and rotor is carried out through simulation, and the structural shape of the copper busbar can be optimized based on the strength analysis results. Mechanical vibration: When the motor is working, the stator and rotor will vibrate under the excitation of electromagnetic force. Through modal analysis and dynamic analysis, the vibration characteristics can be obtained, and corresponding vibration reduction measures can be adopted. It also includes: rotor dynamics and critical speed analysis, shaft deflection and strength analysis, fatigue analysis, etc.

[0061] Thermal simulation analysis includes: Motor structure temperature rise analysis: Under the set heat loss and boundary conditions, analyze the temperature distribution of each component of the motor in order to optimize the motor structure (including the arrangement and layout of copper busbars, etc.) and improve the heat dissipation effect.

[0062] In addition, the production requirements for motors also include: motor assembly requirements, and the influencing factors related to assembly requirements are the fill factor of each slot. The electromagnetic wires of the brushless doubly fed motor are made of copper busbars. The fill factor of each slot is the ratio of the thickness of the copper busbar installed in each slot to the width of each slot. If the ratio is less than or equal to the set value, it indicates that the assembly requirements are met. If the ratio is greater than the set value, it will lead to assembly difficulties and the initial layout structure of the electromagnetic wires needs to be modified. The set value is 0.7~0.75.

[0063] In one embodiment, to facilitate the generation of the initial layout structure of the electromagnetic wire, a copper busbar database (containing copper busbars of various shapes and sizes, such as the thickness and bending angle of the copper busbar) can be established in advance, and motor design rules can be established. For example, by inputting relevant motor parameters (power, torque, number of slots in the stator and rotor, etc.), the layout structure scheme of the copper busbar can be automatically generated. Of course, when generating the layout structure scheme of the copper busbar, the assembly requirements of the motor can be used as constraints, so that it is not necessary to judge the slot fill factor of each slot separately.

[0064] like Figure 6 As shown, the present invention also provides a brushless doubly fed motor, which adopts the electromagnetic wire layout structure described in the present invention, including: a power winding 100 and a control winding 200, wherein the power winding 100 adopts a first stator winding and the control winding 200 adopts a second stator winding.

[0065] The brushless doubly fed motor uses two stator windings. 70% of the high-voltage winding, namely the first stator winding, is used as the power winding 100 and is directly connected to the power grid to obtain power. 30% of the low-voltage winding, namely the second stator winding, is used as the control winding 200 and adopts a low-voltage frequency conversion power supply mode. With the above design, only a 250KW / 380V low-voltage frequency converter is needed to achieve stepless speed regulation and intelligent control of a 1000KW / 10KV high-voltage motor, which reduces equipment procurement and operating costs.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the present invention, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An electromagnetic wire layout structure, characterized in that, include: The first stator winding is a 72-slot, 2-pole, three-phase stator winding. The first stator winding includes three branches that are respectively connected to the three phases UVW, and each branch has 12 coils. The second stator winding is a 72-slot, 6-pole, three-phase stator winding. The second stator winding includes three branches that are respectively connected to the three phases UVW, and each branch has 24 coils. Both the first stator winding and the second stator winding are connected in a star configuration.

2. The electromagnetic wire layout structure according to claim 1, characterized in that, The three branches of the first stator winding include: The first branch A, which is connected to U, has 12 coils with corresponding slot numbers 1, 3, 5, 7, 9, 11, 47, 45, 43, 41, 39, 37. The second branch A, which is connected to V, has 12 coils with corresponding slot numbers 25, 27, 29, 31, 33, 35, 71, 69, 67, 65, 63, 61; The third branch A, which is connected to W, has 12 coils with corresponding slot numbers 49, 51, 53, 55, 57, 59, 23, 21, 19, 17, 15, 13. Coil number 37 is connected to coils numbered 61 and 13 respectively; The coil span is 29. The meaning of the slot number is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a span of 29.

3. The electromagnetic wire layout structure according to claim 1, characterized in that, Each branch of the second stator winding has 6 coil groups, and each coil group has 4 coils; the three branches of the second stator winding include: The first branch B, which is connected to U, has the following coil slot numbers in its six coil groups: Group 1: 1, 2, 3, 4; Group 2: 13, 14, 15, 16; Group 3: 25, 26, 27, 28; Group 4: 37, 38, 39, 40; Group 5: 49, 50, 51, 52; Group 6: 61, 62, 63, 64. The second branch B, which is connected to phase V, has the following coil slot numbers in its six coil groups: Group 1: 9, 10, 11, 12; Group 2: 21, 22, 23, 24; Group 3: 33, 34, 35, 36; Group 4: 45, 46, 47, 48; Group 5: 57, 58, 59, 60; Group 6: 69, 70, 71, 72. The third branch B, which is connected to W, has the following coil slot numbers in its six coil groups: Group 1: 17, 18, 19, 20; Group 2: 29, 30, 31, 32; Group 3: 41, 42, 43, 44; Group 4: 53, 54, 55, 56; Group 5: 65, 66, 67, 68; Group 6: 5, 6, 7, 8. The coil span is 10. The meaning of the slot number is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a span of 10.

4. The electromagnetic wire layout structure according to claim 3, characterized in that, In the first branch B, coil number 1 is connected to U, coils numbered 4 and 16 are connected, coils numbered 13 and 25 are connected, coils numbered 28 and 40 are connected, coils numbered 37 and 49 are connected, and coils numbered 52 and 64 are connected. In the second branch B, coil number 9 is connected to phase V, coils numbered 12 and 24 are connected, coils numbered 21 and 33 are connected, coils numbered 36 and 48 are connected, coils numbered 45 and 57 are connected, and coils numbered 60 and 72 are connected. In the third branch B, coil number 17 is connected to W, coils numbered 20 and 32 are connected, coils numbered 29 and 41 are connected, coils numbered 44 and 56 are connected, coils numbered 53 and 65 are connected, and coils numbered 68 and 8 are connected. Among them, coil number 61 is connected to coils numbered 69 and 5 respectively.

5. The electromagnetic wire layout structure according to claim 3, characterized in that, In the first branch B, coils numbered 1 and 40 are connected to phase U respectively, coils numbered 4 and 16 are connected, coils numbered 13 and 25 are connected, coils numbered 37 and 49 are connected, and coils numbered 52 and 64 are connected. In the second branch B, coils numbered 9 and 48 are connected to phase V respectively, coils numbered 12 and 24 are connected, coils numbered 21 and 33 are connected, coils numbered 45 and 57 are connected, and coils numbered 60 and 72 are connected. In the third branch B, coils numbered 17 and 56 are connected to W respectively, coils numbered 20 and 32 are connected, coils numbered 29 and 41 are connected, coils numbered 53 and 65 are connected, and coils numbered 68 and 8 are connected. Coil number 28 is connected to coils numbered 36 and 44 respectively; Coil number 61 is connected to coils numbered 69 and 5 respectively.

6. The electromagnetic wire layout structure according to claim 1, characterized in that, Also includes: The rotor winding has 96 slots and includes four parallel branches, each with the same number of coils.

7. The electromagnetic wire layout structure according to claim 6, characterized in that, Each branch of the rotor winding has two coil groups connected in series, and each coil group has eight coils; the four parallel branches of the rotor winding include: In the first branch C, the coils in the two coil groups are numbered as follows: Group 1: 7, 8, 10, 11, 36, 37, 38, 41, with a coil span of 16; a coil is also connected in series in the first group, corresponding to slot number 71, with a span of 17; Group 2: 8, 9, 10, 11, 12, 13, 14, 15, with a coil span of 40; a coil is also connected in series in the second group, corresponding to slot number 15, with a span of 34. In the second branch C, the coils in the two coil groups are numbered as follows: Group 1: 55, 56, 58, 59, 84, 85, 86, 89, with a coil span of 16; a coil is also connected in series in Group 1, with a corresponding slot number of 23 and a span of 17; Group 2: 56, 57, 58, 59, 60, 61, 62, 63, with a coil span of 40; a coil is also connected in series in Group 2, with a corresponding slot number of 63 and a span of 34. The third branch C has two coil groups with the following slot numbers: Group 1: 31, 32, 34, 35, 60, 61, 62, 65, with a coil span of 16; Group 1 also has a coil connected in series with slot number 95, with a span of 17; Group 2: 32, 33, 34, 35, 36, 37, 38, 39, with a coil span of 40; Group 2 also has a coil connected in series with slot number 39, with a span of 34. The fourth branch C has two coil groups with the following slot numbers: Group 1: 79, 80, 82, 83, 12, 13, 14, 17, with a coil span of 16; Group 1 also has a coil connected in series with slot number 47, with a span of 17; Group 2: 80, 81, 82, 83, 84, 85, 86, 87, with a coil span of 40; Group 2 also has a coil connected in series with slot number 87, with a span of 34. The meaning of the slot number corresponding to the coil is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a specified span.

8. The electromagnetic wire layout structure according to claim 6, characterized in that, Each branch of the rotor winding has three coil groups connected in series; the four parallel branches of the rotor winding include: The first branch D has the following coil slot numbers in its three coil groups: Group 1: 6, 7, 8, 9, 10, with a coil span of 14; Group 2: 6, 7, 8, 9, 10, 11, 12, 13, 14, with a coil span of 39; Group 3: 35, 36, 37, 38, 39, with a coil span of 14. The second branch D has the following coil slot numbers in its three coil groups: Group 1: 54, 55, 56, 57, 58, with a coil span of 14; Group 2: 54, 55, 56, 57, 58, 59, 60, 61, 62, with a coil span of 39; Group 3: 83, 84, 85, 86, 87, with a coil span of 14. The third branch D has the following coil slot numbers in its three coil groups: Group 1: 30, 31, 32, 33, 34, with a coil span of 14; Group 2: 30, 31, 32, 33, 34, 35, 36, 37, 38, with a coil span of 39; Group 3: 59, 60, 61, 62, 63, with a coil span of 14. The fourth branch D has the following coil slot numbers in its three coil groups: Group 1: 78, 79, 80, 81, 82, with a coil span of 14; Group 2: 78, 79, 80, 81, 82, 83, 84, 85, 86, with a coil span of 39; Group 3: 11, 12, 13, 14, 15, with a coil span of 14. The meaning of the slot number corresponding to the coil is that the electromagnetic wire in the slot with this number is connected to the electromagnetic wire in the slot with the corresponding span to form a coil with a specified span.

9. A method for arranging electromagnetic wires, characterized in that, include: Based on the production requirements of the motor, design the initial layout structure of the electromagnetic wire; The motor is simulated based on the initial layout structure of the electromagnetic wires, and the initial layout structure of the electromagnetic wires is modified based on the simulation results until the simulation results meet the production requirements of the motor, thus obtaining the modified electromagnetic wire layout structure. Based on the revised electromagnetic wire layout structure, draw the wiring diagrams for the first stator winding, the second stator winding, and the rotor winding.

10. A brushless doubly-fed motor, employing the electromagnetic wire layout structure described in claim 1, characterized in that, include: The system includes a power winding and a control winding, wherein the power winding is a first stator winding and the control winding is a second stator winding.

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