Flat wire motor suitable for different parallel branch windings

Abstract

The present application relates to the technical field of flat wire motor, and discloses a flat wire motor suitable for different parallel branch windings. In the present application, Y / 2+1 kinds of hairpins are needed to realize the design of motor windings, the kinds of hairpins are less, and the mold opening cost and equipment cost are reduced; in the motor production, the production efficiency is increased. In the single unit of the present application, two kinds of same-layer hairpins and one kind of cross-layer hairpin group are adopted, so that different branch numbers can be obtained through simple series connection or parallel connection of the unit, and the unit is suitable for 1 branch, 2 branches and 4 branches, thereby improving the universality of the unit of the present application, facilitating product serialization, and achieving the purpose of reducing the manufacturing cycle. In addition, the unit composed of the three kinds of hairpin combinations forms a "short distance" arrangement form, which is beneficial to eliminate harmonics.

Description

Technical Field

[0001] This invention relates to the field of flat wire motor technology, and more specifically to flat wire motors applicable to different parallel branch windings. Background Technology

[0002] Chinese patent CN217183063U discloses a single-branch structure flat wire stator assembly and a motor using the stator assembly; in this patent, there are many types of hairpins, four layers of flat wire require 5 types of hairpins, and the corresponding 8 layers of flat wire require at least 7 types.

[0003] Chinese patent CN115693998A discloses a winding structure for a flat wire motor stator; in this patent, the hairpin is not universal and cannot realize the conversion of a single branch to multiple branches.

[0004] Existing technologies mostly focus on designs with two or more parallel windings, with less consideration for single windings. Furthermore, the winding connection methods are relatively fixed, and the number of parallel branches cannot be changed without adding busbars, making them unsuitable for different voltage and power levels. When designing a flat-wire motor, the following requirements must be met:

[0005] 1. Single branch connection can be achieved.

[0006] 2. Fewer types of hair clips are better, to reduce mold costs and manufacturing complexity;

[0007] 3. The generator is versatile and applicable to different parallel branches, reducing the manufacturing cycle;

[0008] 4. Short-pitch windings are used, resulting in better short-torque performance, which helps eliminate harmonics; Summary of the Invention

[0009] To address the aforementioned shortcomings of existing technologies, a flat wire motor suitable for different parallel branch windings is provided, which uses fewer types of hairpins and can achieve single-branch operation.

[0010] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0011] Flat wire motors suitable for different parallel branch windings include stator core and stator windings. The stator core has several stator slots evenly distributed along the circumference. The stator windings are divided into phase a windings in the stator slots. The electrical phases of the phase a windings are different from each other. Each phase winding has one or more parallel branches.

[0012] The winding consists of several hairpins welded together end to end. Each hairpin is a U-shaped structure, including two effective conductors, welding ends located on the same side of the two effective conductors, and hairpin connecting sections connecting the other side of the two effective conductors. The effective conductors are placed in the stator slots of the stator core. The welding ends of all hairpins are located on one side of the stator core, and the hairpin connecting sections are located on the other side of the stator core.

[0013] A single stator slot has Y layers, where Y is an even number not less than 4. The layer closest to the slot opening is the first layer, and each magnetic pole corresponds to q stator slots. The stator core contains X stator slots, and each magnetic pole corresponds to q = X / 2p stator slots, where p is the number of pole pairs, i.e., 2p is the number of magnetic poles, and X is an integer multiple of q.

[0014] The feature is that: in a phase winding, a parallel branch is composed of one or more units connected in series, and the number of units in a phase winding is fixed; in a phase winding, one unit is rotated 2nq stator slots to obtain another unit, where n is a positive integer;

[0015] In a single unit, there are two first-layer same-layer hairpins, two Y-layer same-layer hairpins, and four cross-layer hairpin groups. The cross-layer hairpin groups are connected between the first-layer same-layer hairpins and the Y-layer same-layer hairpins. According to the current direction, in the same hairpin, the effective conductor in front is set as conductor A, and the effective conductor in the back is set as conductor B.

[0016] In the first layer and the Yth layer of the same-layer hairpins; in one type of same-layer hairpin, the span between the two effective conductors is either a long span or a short span, and the A conductor of one hairpin is in the clockwise direction of the B conductor, while the A conductor of the other hairpin is in the counterclockwise direction of the B conductor; in another type of same-layer hairpin, the span between the two effective conductors is always a whole span, and the A conductors of both hairpins are simultaneously in the clockwise or counterclockwise direction of the B conductor.

[0017] A cross-layer hairpin group consists of multiple cross-layer hairpins with the same span, and the two effective conductors of the cross-layer hairpins are separated by one layer; in all cross-layer hairpin groups, the effective conductors located on the higher layer are in the clockwise or counterclockwise direction of the effective conductors located on the lower layer; the welded joints between adjacent hairpins are composed of welded ends, and the span of the two effective conductors in all welded joints is the same; between the two effective conductors of the same cross-layer hairpin and between the two effective conductors of the same welded joint, if one has a long span, the other has a short span.

[0018] According to the above technical solution, the whole distance is q, the long distance is q+1, and the short distance is q-1.

[0019] According to the above technical solution, in the unit, any one of the welded parts is disconnected to serve as the inlet and outlet of the lead wire.

[0020] Furthermore, an effective conductor of the same layer hairpin in the Y layer is used as the inlet or outlet of the lead wire, and the end of the last cross-layer hairpin group in the unit is used as the outlet or inlet of the lead wire.

[0021] According to the above technical solution, the span between the two effective conductors of the two first-layer hairpins is q-1 or q+1. The A conductor of one first-layer hairpin is in the clockwise direction of the B conductor, and the A conductor of the other first-layer hairpin is in the clockwise and counterclockwise direction of the B conductor.

[0022] The span between the two effective conductors of two Y-layer hairpins is q, and the A conductor of the two Y-layer hairpins is simultaneously in the clockwise or counterclockwise direction of the B conductor.

[0023] Furthermore, X is set to 48, a to 3, and p to 4, at which point q is 6, and the long-distance or short-distance is 7 or 5 respectively; a parallel branch consists of one unit, two units connected in series, or four units connected in series.

[0024] According to the above technical solution, the span between the two effective conductors of the two Y-th layer hairpins is q-1 or q+1. The A conductor of one Y-th layer hairpin is in the clockwise direction of the B conductor, and the A conductor of the other Y-th layer hairpin is in the clockwise and counterclockwise direction of the B conductor.

[0025] The span between the two effective conductors of two first-layer hairpins is q, and the A conductor of the two first-layer hairpins is simultaneously in the clockwise or counterclockwise direction of the B conductor.

[0026] Furthermore, X is set to 48, a to 3, and p to 4, at which point q is 6, and the long-distance or short-distance is 7 or 5 respectively; a parallel branch consists of one unit, two units connected in series, or four units connected in series.

[0027] The present invention has the following beneficial effects:

[0028] 1. In this invention, the winding within the unit is composed of alternating connections of same-layer hairpins and cross-layer hairpin groups. Same-layer hairpins are set in the first and Y-th layers, while cross-layer hairpin groups are set in the intermediate layer between the first and Y-th layers. This reduces the number of hairpin types required; only Y / 2+1 types of hairpins are needed to design the motor winding. Fewer hairpin types reduce mold and equipment costs, as each type requires a corresponding mold and stamping equipment. Insufficient stamping equipment and frequent mold replacements accelerate mold and equipment aging, thus reducing costs. Furthermore, fewer hairpin types reduce the time workers spend selecting the correct hairpin during motor production, improving production efficiency.

[0029] Secondly, since a single unit of this invention includes two types of same-layer hairpins, one type uses a full-pitch configuration, where the A conductor of one hairpin is clockwise of the B conductor, and the A conductor of the other hairpin is counterclockwise of the B conductor. The other type uses either a long or short pitch, where the A conductors of both hairpins are simultaneously clockwise or counterclockwise of the B conductor. Furthermore, a cross-layer hairpin group consisting of multiple cross-layer hairpins with the same span is provided between a first-layer hairpin and a Y-layer hairpin; in all cross-layer hairpin groups, the effective conductors located on higher layers are in either a clockwise or counterclockwise direction of the effective conductors on lower layers; and if one of the welding part and the cross-layer hairpin is long-pitched, the other is short-pitched. Based on the design, different numbers of branches, such as 1 branch, 2 branches, and 4 branches, can be obtained by simply connecting the units in series or in parallel, which improves the versatility of the units in this invention, facilitates product serialization, and thus achieves the goal of reducing the manufacturing cycle.

[0030] Finally, three types of hairpin components are used to form a "short-distance" arrangement, which is beneficial for eliminating harmonics.

[0031] 2. Each branch has only 2 leads, which is the minimum theoretically possible. In addition, the two leads of all branches in the same phase are concentrated in the Y-th and Y-1-th layers, which are separated by p stator slots. The leads of all branches in all phases are adjacent to each other. While ensuring the concentration of leads, the winding end height can be effectively reduced, the motor power density can be increased, the manufacturing process can be reduced, and the motor reliability can be increased.

[0032] 3. Each branch of the present invention is consistent and will not generate circulating current. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of an embodiment provided by the present invention;

[0034] Figure 2 This refers to the number of stator slot layers provided in one embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the hair clip structure provided in an embodiment of the present invention. Figure 1 ;

[0036] Figure 4 This is a schematic diagram of the hair clip structure provided in an embodiment of the present invention. Figure 2 ;

[0037] Figure 5 This is a schematic diagram of the hair clip structure provided in an embodiment of the present invention. Figure 3 ;

[0038] Figure 6This is a connection diagram of the three-phase windings according to one embodiment of the present invention;

[0039] Figure 7 This is a connection diagram of the three-phase windings according to another embodiment of the present invention;

[0040] In the diagram, 1. Stator core; 2. Stator winding; 3. Stator slot; 4. Hairpin; 4-1. Effective conductor; 4-2. Welding end; 4-3. Hairpin connection section; 5. First layer same-layer hairpin; 6. Yth layer same-layer hairpin; 7. Cross-layer hairpin group; 8. Lead wire. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Reference Figures 1 to 7 As shown, the present invention provides a flat wire motor suitable for different parallel branch windings.

[0043] Example 1

[0044] It includes a stator core 1 and a stator winding 2, and several stator slots 3 evenly distributed along the circumference of the stator core. The stator winding is divided into a phase winding in the stator slot. The electrical phases of the a phase windings are different from each other. Each phase winding has one or more parallel branches.

[0045] The winding consists of several hairpins 4 welded together end to end. Each hairpin is a U-shaped structure, including two effective conductors 4-1, welding ends 4-2 located on the same side of the two effective conductors, and hairpin connecting section 4-3 connecting the other side of the two effective conductors. The effective conductors are placed in the stator slots of the stator core. The welding ends of all hairpins are located on one side of the stator core, and the hairpin connecting section is located on the other side of the stator core.

[0046] A single stator slot has Y layers, where Y is an even number not less than 4. The layer closest to the slot opening is the first layer, and each magnetic pole corresponds to q stator slots. The stator core contains X stator slots, and each magnetic pole corresponds to q = X / 2p stator slots, where p is the number of pole pairs, i.e., 2p is the number of magnetic poles, and X is an integer multiple of q.

[0047] The feature is that: in a phase winding, a parallel branch is composed of one or more units connected in series, and the number of units in a phase winding is fixed, that is, the fewer the number of units in each parallel branch, the more parallel branches there are in a phase winding; in a phase winding, one unit is rotated 2nq stator slots to obtain another unit, where n is a positive integer.

[0048] In a single unit, there are two first-layer same-layer hairpins 5, two Y-layer same-layer hairpins 6, and four cross-layer hairpin groups 7. The cross-layer hairpin groups are connected between the first-layer same-layer hairpins and the Y-layer same-layer hairpins. According to the current direction, in the same hairpin, the effective conductor in front is set as conductor A, and the effective conductor in the back is set as conductor B.

[0049] In the first layer and the Yth layer of the same-layer hairpins; in one type of same-layer hairpin, the span between the two effective conductors is either a long span or a short span, and the A conductor of one hairpin is in the clockwise direction of the B conductor, while the A conductor of the other hairpin is in the counterclockwise direction of the B conductor; in another type of same-layer hairpin, the span between the two effective conductors is always a whole span, and the A conductors of both hairpins are simultaneously in the clockwise or counterclockwise direction of the B conductor.

[0050] A cross-layer hairpin group consists of multiple cross-layer hairpins with the same span, and the two effective conductors of the cross-layer hairpins are separated by one layer; in all cross-layer hairpin groups, the effective conductors located on the higher layer are in the clockwise or counterclockwise direction of the effective conductors located on the lower layer; the welded joints between adjacent hairpins are composed of welded ends, and the span of the two effective conductors in all welded joints is the same; between the two effective conductors of the same cross-layer hairpin and between the two effective conductors of the same welded joint, if one has a long span, the other has a short span.

[0051] In this invention, the windings within the unit are composed of alternating connections of same-layer and cross-layer hairpin groups. Same-layer hairpins are set in the first and Y-th layers, while cross-layer hairpin groups are set in the intermediate layer between the first and Y-th layers. This reduces the number of hairpin types required; only Y / 2+1 types of hairpins are needed to design the motor windings. Fewer hairpin types reduce mold and equipment costs, as each type requires a corresponding mold and stamping equipment. Insufficient stamping equipment and frequent mold replacements accelerate mold and equipment aging, thus reducing costs. Furthermore, fewer hairpin types reduce the time workers spend selecting the correct hairpin during motor production, improving production efficiency.

[0052] Secondly, since a single unit of this invention includes two types of same-layer hairpins, one type uses a full-pitch configuration, where the A conductor of one hairpin is clockwise of the B conductor, and the A conductor of the other hairpin is counterclockwise of the B conductor. The other type uses either a long or short pitch, where the A conductors of both hairpins are simultaneously clockwise or counterclockwise of the B conductor. Furthermore, a cross-layer hairpin group consisting of multiple cross-layer hairpins with the same span is provided between a first-layer hairpin and a Y-layer hairpin; in all cross-layer hairpin groups, the effective conductors located on higher layers are in either a clockwise or counterclockwise direction of the effective conductors on lower layers; and if one of the welding part and the cross-layer hairpin is long-pitched, the other is short-pitched. Based on the design, different numbers of branches can be obtained by simply connecting the units in series or in parallel, applicable to 1 branch, 2 branches, and 4 branches, which improves the versatility of the unit of the present invention, facilitates product serialization, and thus achieves the purpose of reducing the manufacturing cycle.

[0053] Finally, three types of hairpin components are used to form a "short-distance" arrangement, which is beneficial for eliminating harmonics.

[0054] Example 2

[0055] The structure and principle of Example 2 are similar to those of Example 1, except that: preferably, the whole distance is q, the long distance is q+1, and the short distance is q-1.

[0056] Example 3

[0057] The structure and principle of Example 3 are similar to those of Example 1, except that in the unit, any one of the welded parts is disconnected as the inlet and outlet of the lead wire 8.

[0058] Based on Embodiment 3, as shown in the preferred embodiment, an effective conductor of the same layer hairpin in the Yth layer is used as the inlet or outlet of the lead wire, and the end of the last cross-layer hairpin group in the unit is used as the outlet or inlet of the lead wire.

[0059] Example 4

[0060] The structure and principle of Example 4 are similar to those of Examples 1-3, except that the span between the two effective conductors of the two first-layer hairpins is q-1 or q+1, the A conductor of one first-layer hairpin is in the clockwise direction of the B conductor, and the A conductor of the other first-layer hairpin is in the clockwise and counterclockwise direction of the B conductor.

[0061] The span between the two effective conductors of two Y-layer hairpins is q, and the A conductor of the two Y-layer hairpins is simultaneously in the clockwise or counterclockwise direction of the B conductor.

[0062] Based on Embodiment 4, preferably, the stator core has 48 stator slots distributed at specific intervals on the circumference; the stator winding includes a 3-phase winding mounted on the stator core, with each pair of phases being different, and forming 8 layers radially along the stator core within the stator slots. In this embodiment, the motor rotor has 8 magnetic poles, i.e., each magnetic pole corresponds to 6 stator slots, and each pole corresponds to 2 stator slots per phase. One phase winding comprises 4 units consisting of 1 parallel branch, and the winding connection and hairpin arrangement of each unit are completely identical. Multiple units are rotationally symmetrically distributed along the core axis, with adjacent units differing by 12 stator slots on the circumference. Furthermore, in this embodiment, the parallel branch consists of 4 units.

[0063] like Figure 6 As shown, the first layer of same-layer hairpins includes two first layer same-layer hairpins. The first layer same-layer hairpins and the cross-layer hairpin group are connected at the welding end. The A conductors of the two hairpins included in the first layer same-layer hairpins are in the 3rd slot 1 layer and the 4th slot 1 layer respectively. The B conductors are in the same direction and cross 6 slots to the other pole, located in the 9th slot 1 layer and the 10th slot 1 layer respectively. The span of the first layer same-layer hairpins is 6.

[0064] The second part of the conductor comprises 12 cross-layer hairpin groups, which are divided into 4 groups. Each group consists of 3 cross-layer hairpin groups connected in series, spanning one pole in the same direction. These groups are arranged circumferentially along the stator core in layers 2 to 7 within the stator slots. Multiple cross-layer hairpin groups in layer 2 are connected to the hairpins in layer 1 at the welding end, and multiple cross-layer hairpin groups in layer 7 are connected to the hairpins in layer 8 at the welding end. The span of the welding section is 7, and the span of the cross-layer hairpins is 5.

[0065] The 8th layer same-layer hairpin contains two 8th layer same-layer hairpins. The first layer same-layer hairpin and the cross-layer hairpin group are connected at the welding end. The first conductor of the two hairpins in the first layer same-layer hairpin are in the 8th layer of slot 14 and the 8th layer of slot 15, respectively. The second conductor crosses 5 slots in the opposite direction to the other pole, located in the 8th layer of slot 9 and the 8th layer of slot 20, respectively. The span of the 8th layer same-layer hairpin is 5.

[0066] A unit consists of a first-layer hairpin, a third-layer conductor, and a second-layer conductor. Rotating 12 slots in a circular direction sequentially forms three other coil units. The four coil units are connected in series. Disconnecting two specific hairpin solder joints forms two lead wires, thus forming a branch.

[0067] Example 5

[0068] The structure and principle of Example 5 are similar to those of Examples 1-3, except that the span between the two effective conductors of the two Y-th layer hairpins is q-1 or q+1, the A conductor of one Y-th layer hairpin is in the clockwise direction of the B conductor, and the A conductor of the other Y-th layer hairpin is in the clockwise and counterclockwise direction of the B conductor.

[0069] The span between the two effective conductors of two first-layer hairpins is q, and the A conductor of the two first-layer hairpins is simultaneously in the clockwise or counterclockwise direction of the B conductor.

[0070] Based on Embodiment 5, preferably, the stator core has 48 stator slots distributed at specific intervals on the circumference; the stator winding includes a 3-phase winding mounted on the stator core, with each pair of phases being different, and forming 6 layers radially along the stator core within the stator slots. In this embodiment, the motor rotor has 8 magnetic poles, i.e., each magnetic pole corresponds to 6 stator slots, and each pole corresponds to 2 stator slots per phase. One phase winding comprises 4 units consisting of 1 parallel branch, and the winding connection and hairpin arrangement of each unit are completely identical. Multiple units are rotationally symmetrically distributed along the core axis, with adjacent units differing by 12 stator slots on the circumference. Furthermore, in this embodiment, the parallel branch consists of 2 units.

[0071] like Figure 7 As shown, the first layer of same-layer hairpins includes two first layer same-layer hairpins. The first layer same-layer hairpins and the cross-layer hairpin group are connected at the welding end. The A conductors of the two hairpins included in the first layer same-layer hairpins are respectively in the 3 slot 1 layer and the 4 slot 1 layer. The B conductors are respectively in the opposite direction to cross 7 slots to the other pole, located in the 10 slot 1 layer and the 45 slot 1 layer. The span of the first layer same-layer hairpins is 7.

[0072] The second part of the conductor comprises eight cross-layer hairpin groups, which are divided into four groups. Each group consists of two cross-layer hairpin groups connected in series, spanning one pole sequentially in the same direction. These groups are arranged circumferentially along the stator core in layers 2 to 5 within the stator slots. Multiple cross-layer hairpin groups in layer 2 are connected to the hairpins in layer 1 at the welding end, and multiple cross-layer hairpin groups in layer 5 are connected to the hairpins in layer 6 at the welding end. The span of the welding section is 5 units, and the span of the cross-layer hairpins is 7 units.

[0073] The sixth-layer same-layer hairpin contains two sixth-layer same-layer hairpins. The first-layer same-layer hairpin and the cross-layer hairpin group are connected at the welding end. The first conductors of the two hairpins in the first-layer same-layer hairpin are in the 6th layer of slot 32 and slot 33, respectively. The second conductors cross 6 slots in the opposite direction to the other pole, located in the 6th layer of slot 26 and slot 27, respectively. The span of the sixth-layer same-layer hairpin is 6.

[0074] A unit consists of a first-layer hairpin, a third-layer conductor, and a second-layer conductor. Rotating 12 slots in a circular direction sequentially forms three other coil units. The four coil units are connected in series. Disconnecting two specific hairpin solder joints forms two lead wires, thus forming a branch.

[0075] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A flat wire motor suitable for different parallel branch windings, including stator core and stator windings, with several stator slots evenly distributed along the circumference of the stator core, and the stator windings divided into a phase windings in the stator slots, with each phase winding having a different electrical phase, and each phase winding having one or more parallel branches. The winding consists of several hairpins welded together end to end. Each hairpin is a U-shaped structure, including two effective conductors, welding ends located on the same side of the two effective conductors, and hairpin connecting sections connecting the other side of the two effective conductors. The effective conductors are placed in the stator slots of the stator core. The welding ends of all hairpins are located on one side of the stator core, and the hairpin connecting sections are located on the other side of the stator core. A single stator slot has Y layers, where Y is an even number not less than 4. The layer closest to the slot opening is the first layer, and each magnetic pole corresponds to q stator slots. The stator core contains X stator slots, and each magnetic pole corresponds to q = X / 2p stator slots, where p is the number of pole pairs, i.e., 2p is the number of magnetic poles, and X is an integer multiple of q. characterized in that In a phase winding, a parallel branch consists of one or more units connected in series, and the number of units in a phase winding is fixed; in a phase winding, one unit is rotated 2nq stator slots to obtain another unit, where n is a positive integer. In a single unit, there are two first-layer same-layer hairpins, two Y-layer same-layer hairpins, and four cross-layer hairpin groups. The cross-layer hairpin groups are connected between the first-layer same-layer hairpins and the Y-layer same-layer hairpins. According to the current direction, in the same hairpin, the effective conductor in front is set as conductor A, and the effective conductor in the back is set as conductor B. In the first layer and the Yth layer of the same-layer hairpins; in one type of same-layer hairpin, the span between the two effective conductors is either a long span or a short span, and the A conductor of one hairpin is in the clockwise direction of the B conductor, while the A conductor of the other hairpin is in the counterclockwise direction of the B conductor; in another type of same-layer hairpin, the span between the two effective conductors is always a whole span, and the A conductors of both hairpins are simultaneously in the clockwise or counterclockwise direction of the B conductor. A cross-layer hairpin group consists of multiple cross-layer hairpins with the same span, and the two effective conductors of the cross-layer hairpins are separated by one layer; in all cross-layer hairpin groups, the effective conductors located on the higher layer are in the clockwise or counterclockwise direction of the effective conductors located on the lower layer; the welded joints between adjacent hairpins are composed of welded ends, and the span of the two effective conductors in all welded joints is the same; between the two effective conductors of the same cross-layer hairpin and between the two effective conductors of the same welded joint, if one has a long span, the other has a short span.

2. The flat wire motor suitable for different parallel branch windings according to claim 1, characterized in that: The integer distance is q, the long distance is q+1, and the short distance is q-1.

3. The flat wire motor applicable to different parallel branch windings according to claim 1, characterized in that: In the unit, any one of the welded parts is disconnected to serve as the inlet and outlet for the lead-out line.

4. The flat wire motor applicable to different parallel branch windings according to claim 3, characterized in that: An effective conductor of the same layer hairpin in the Y layer is used as the inlet or outlet of the lead wire, and the end of the last cross-layer hairpin group in the unit is used as the outlet or inlet of the lead wire.

5. The flat wire motor applicable to different parallel branch windings according to any one of claims 1-4, characterized in that: The span between the two effective conductors of the two first-layer same-layer hairpins is q-1 or q+1. The A conductor of one first-layer same-layer hairpin is in the clockwise direction of the B conductor, and the A conductor of the other first-layer same-layer hairpin is in the clockwise and counterclockwise direction of the B conductor. The span between the two effective conductors of two Y-layer hairpins is q, and the A conductor of the two Y-layer hairpins is simultaneously in the clockwise or counterclockwise direction of the B conductor.

6. The flat wire motor applicable to different parallel branch windings according to claim 5, characterized in that: X is 48, a is 3, p is 4, and q is 6. The long distance or short distance is 7 or 5 respectively. A parallel branch consists of one unit, two units connected in series, or four units connected in series.

7. The flat wire motor applicable to different parallel branch windings according to any one of claims 1-4, characterized in that: The span between the two effective conductors of the two Y-th layer hairpins is either q-1 or q+1. The A conductor of one Y-th layer hairpin is in the clockwise direction of the B conductor, and the A conductor of the other Y-th layer hairpin is in the clockwise and counterclockwise direction of the B conductor. The span between the two effective conductors of two first-layer hairpins is q, and the A conductor of the two first-layer hairpins is simultaneously in the clockwise or counterclockwise direction of the B conductor.

8. The flat wire motor applicable to different parallel branch windings according to claim 7, characterized in that: X is 48, a is 3, p is 4, and q is 6. The long distance or short distance is 7 or 5 respectively. A parallel branch consists of one unit, two units connected in series, or four units connected in series.

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