Flat wire motors and vehicles equipped with them

Abstract

This invention provides a flat-wire motor and a vehicle having the same, comprising: a stator core with multiple stator slots evenly distributed circumferentially; a stator winding having three-phase windings disposed within the stator slots, each phase winding having two parallel branch windings, each branch winding being composed of multiple coils connected in series, the multiple coils connected in series forming a forward cross-layer winding, a reverse cross-layer winding, and a same-layer winding, the same-layer winding being connected in series between the forward and reverse cross-layer windings, the forward and reverse cross-layer windings being arranged in parallel; wherein, the phase leads of the stator winding are continuously distributed within the same layer of stator slots. The same-layer winding is located at the turning point of the winding, changing the cross-winding direction and position of the winding, the cross-winding angle of the forward and reverse cross-layer windings remains consistent, the output and input ends of each branch winding are located in the same layer, and each branch winding can be wound synchronously, realizing the switching between continuous wave winding technology and pin-insertion winding technology.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and more specifically, to a flat wire motor and a vehicle having the same. Background Technology

[0002] With the increase in flat wire motor models in the new energy vehicle market and the significant increase in the production volume of different models, the production efficiency and cost of flat wire motors have become the core of their development.

[0003] In the design, the winding layout of the stator using pin winding technology and the stator using continuous wave winding technology are quite different. The two winding technologies cannot be switched without changing the winding layout.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a flat wire motor and a vehicle having the same, in order to solve the technical problem that pin winding technology and continuous wave winding technology cannot be switched without changing the winding layout.

[0006] To achieve the above objectives, according to one aspect of the present invention, a flat wire motor is provided, comprising: a stator core having a plurality of stator slots evenly distributed circumferentially; a stator winding having three-phase windings disposed in the stator slots, each phase winding having two parallel branch windings, the branch windings being formed by multiple coils connected in series, the multiple coils being connected in series to form a forward cross-layer winding, a reverse cross-layer winding, and a same-layer winding, the same-layer winding being connected in series between the forward cross-layer winding and the reverse cross-layer winding, the forward cross-layer winding and the reverse cross-layer winding being arranged in parallel; wherein, the phase leads of the stator winding are continuously distributed in the stator slots of the same layer.

[0007] Furthermore, the branch winding has two phase leads, one of which is led out from the forward cross-layer winding, and the other of which is led out from the reverse cross-layer winding. The span between the two phase leads is equal to the span of the winding in the same layer.

[0008] Furthermore, in the stator winding, the phase leads drawn from the forward cross-layer winding are continuously distributed in the corresponding stator slots, and the phase leads drawn from the reverse cross-layer winding are continuously distributed in the corresponding stator slots.

[0009] Furthermore, in the two branch windings of the same phase, the two phase leads drawn from the positive cross-layer winding are arranged adjacent to each other, and the two phase leads drawn from the reverse cross-layer winding are arranged adjacent to each other.

[0010] Furthermore, the span of the coils in each forward and reverse cross-layer winding is equal, while the span of the two same-layer windings in the two parallel branch windings in the same phase is not equal.

[0011] Furthermore, the span of the coils in both the forward and reverse cross-layer windings is six stator slots, and the same-layer winding consists of one coil. The spans of the two same-layer windings in the two parallel branch windings in the same phase are five stator slots and seven stator slots, respectively.

[0012] Furthermore, the coils in both the forward cross-layer winding and each reverse cross-layer winding are bridging between two adjacent layers of the stator slot.

[0013] Furthermore, each branch winding crosses all stator slots of the stator core.

[0014] Furthermore, the phase leads of the stator winding are all located in the innermost layer of the stator slot or in the outermost layer of the stator slot.

[0015] According to another aspect of the present invention, a vehicle is provided, including a flat wire motor, wherein the flat wire motor is the flat wire motor described above.

[0016] Applying the technical solution of this invention, the stator winding has six branch windings, each branch winding being composed of a forward cross-layer winding, a reverse cross-layer winding, and a same-layer winding connected in series. The same-layer winding is connected in series between the forward and reverse cross-layer windings, that is, the same-layer winding is located at the turning point of the winding, playing a transition role and used to change the cross-winding direction and cross-winding position of the winding. The forward and reverse cross-layer windings are arranged in parallel, and the phase leads of the stator winding are continuously distributed in the same layer of the stator slots, that is, the overall cross-winding angle of the forward and reverse cross-layer windings is consistent. The output and input ends of the six branch windings are kept in the same layer, which can realize the synchronous cross-winding of the six branch windings. Among them, the forward cross-layer winding is wound from the outer stator slot to the inner stator slot, the reverse cross-layer winding is wound from the inner stator slot to the outer stator slot, and the same-layer winding is wound between the same-layer stator slots. The above-mentioned cross-winding method is not only applicable to the winding of pin windings, but also can meet the winding of continuous wave windings without changing the cross-winding layout. According to actual needs, the two winding methods can be switched without adjusting the winding layout, which has good compatibility and low design investment cost. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the stator structure according to an embodiment of the flat wire motor of the present invention is shown;

[0019] Figure 2 A schematic diagram of the stator slot structure in this invention is shown;

[0020] Figure 3 This invention shows a schematic diagram of the winding unfolding of the U1 branch winding;

[0021] Figure 4 This diagram shows the winding unfolding of the U2 branch winding in this invention;

[0022] Figure 5 This invention shows a schematic diagram of the structure of each coil constituting the forward and reverse interlayer windings;

[0023] Figure 6 A schematic diagram of the structure of each coil constituting the same layer winding in this invention is shown.

[0024] The above figures include the following reference numerals:

[0025] 10. Stator core; 11. Stator slot;

[0026] 20. Stator windings;

[0027] 30. Coil;

[0028] 40. Phase lead-out line. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0033] Combination Figures 1 to 6 As shown, according to a specific embodiment of this application, a flat wire motor is provided.

[0034] Specifically, the flat wire motor includes a stator and a rotor. The stator includes a stator core 10 and a stator winding 20. The stator core 10 has multiple stator slots 11 evenly distributed around its circumference. The stator winding 20 has three-phase windings disposed in the stator slots 11. Each phase winding has two parallel branch windings. The branch windings are composed of multiple coils 30 connected in series. The multiple coils 30 connected in series form a forward cross-layer winding, a reverse cross-layer winding, and a same-layer winding. The same-layer winding is connected in series between the forward cross-layer winding and the reverse cross-layer winding. The forward cross-layer winding and the reverse cross-layer winding are arranged in parallel. The phase leads 40 of the stator winding 20 are continuously distributed in the stator slots 11 of the same layer.

[0035] In the embodiments of this application, the stator winding 20 has six branch windings, each branch winding being composed of a forward cross-layer winding, a reverse cross-layer winding, and a same-layer winding connected in series. The same-layer winding is connected in series between the forward and reverse cross-layer windings, that is, the same-layer winding is located at the turning point of the winding, serving as a transition to change the cross-winding direction and position of the winding. The forward and reverse cross-layer windings are arranged in parallel, and the phase leads 40 of the stator winding 20 are continuously distributed in the stator slots 11 of the same layer, that is, the overall cross-winding angle of the forward and reverse cross-layer windings is consistent. The output and input ends of the six branch windings are kept in the same layer, enabling synchronous cross-winding of the six branch windings. Among them, the forward cross-layer winding is wound from the outer stator slot 11 to the inner stator slot 11, the reverse cross-layer winding is wound from the inner stator slot 11 to the outer stator slot 11, and the same-layer winding is wound between the same-layer stator slots 11. The above-mentioned cross-winding method is not only applicable to the winding of pin windings, but also can meet the winding of continuous wave windings without changing the cross-winding layout. According to actual needs, the two winding methods can be switched without adjusting the winding layout, which has good compatibility and low design investment cost.

[0036] The branch winding has two phase leads 40. One of the phase leads 40 is led from the forward cross-layer winding, and the other is led from the reverse cross-layer winding. The span between the two phase leads 40 is equal to the span of the winding in the same layer. This equal span between the two phase leads 40 further demonstrates that during the cross-winding process, the forward and reverse cross-layer windings are parallel, and there is no crossing between them, i.e., no irregular wires appear. The continuous wave winding process and the pin-insertion winding process can be switched unconditionally.

[0037] Furthermore, in the stator winding 20, the phase leads 40 drawn from the forward cross-layer winding are continuously distributed in the corresponding stator slots 11, and the phase leads 40 drawn from the reverse cross-layer winding are continuously distributed in the corresponding stator slots 11. This cross-winding layout further illustrates that the six branch windings remain parallel throughout the cross-winding process, without crossing, i.e., without irregularly shaped lines.

[0038] Furthermore, in the two branch windings of the same phase, the two phase leads 40 drawn from the forward cross-layer winding are arranged adjacently, and the two phase leads 40 drawn from the reverse cross-layer winding are arranged adjacently. The above-mentioned cross-winding layout facilitates sequential wiring with the end return bus and avoids wiring crossover confusion.

[0039] Furthermore, the span of coil 30 in both the forward and reverse cross-layer windings is equal, while the span of the two windings in the same layer of the two parallel branch windings in the same phase is unequal. When using the pin-insertion winding process, the equal span of coil 30 in both the forward and reverse cross-layer windings reduces the coil shape and lowers the manufacturing difficulty and cost. The unequal span of the two windings in the same layer of the two parallel branch windings in the same phase avoids the cross-winding phenomenon during the cross-winding process, allowing the branch windings to cross all the stator slots 11 of the stator core 10. The branch windings cooperate with each other to achieve balance, preventing circulating current due to branch imbalance in the event of eccentricity in the motor rotor structure or other factors that cause different potentials between different poles.

[0040] In this design, the span of coil 30 in both the forward and reverse cross-layer windings is six stator slots 11. Each layer winding consists of one coil 30. The spans of the two parallel branch windings in the same phase are five and seven stator slots 11, respectively. The above-mentioned wire profile is a commonly used profile, reducing manufacturing complexity.

[0041] Furthermore, the coils 30 in each forward and reverse cross-layer winding are bridging between two adjacent layers in the stator slot 11. Bridging between adjacent layers prevents the bridging angle of the coils 30 from becoming too large, making the bridging more flexible.

[0042] As an alternative implementation, the coils 30 in each forward cross-layer winding and each reverse cross-layer winding can also be cross-wound between three or four consecutive layers of the stator slot 11.

[0043] Furthermore, each branch winding bypasses all stator slots 11 of the stator core 10. This prevents circulating current from occurring in the event of rotor eccentricity or other conditions that cause potential differences between poles.

[0044] Furthermore, the phase leads 40 of the stator winding 20 are all located in the innermost layer or the outermost layer of the stator slot 11. This facilitates connection with the busbar, fully utilizes the yoke space of the stator core, and reduces the axial length.

[0045] This application uses an 8-pole, 48-slot, 6-layer flat wire motor as an example for detailed description, such as... Figure 2 As shown, the stator slots 11, from the first to the sixth layer, are L1, L2, L3, L4, L5, and L6, with L1 located in the innermost layer and L6 in the outermost layer. Each coil 30 is wound across adjacent layers. Figure 3 , Figure 4As shown in the figure, the dashed lines represent the non-lead side of coil 30, and the solid lines represent the lead side of coil 30. Taking the U-phase winding as an example, the winding layout is described in detail below:

[0046] like Figure 3As shown, this is the first branch U1 of phase U. The forward cross-layer winding crosses from the outer layer to the inner layer of stator slot 11, and the reverse cross-layer winding crosses from the inner layer to the outer layer of stator slot 11. The same-layer winding crosses within the same layer of stator slot 11. The span of the coil 30 constituting the forward and reverse cross-layer windings is six stator slots 11, and the span of the same-layer winding coil 30 is seven stator slots 11. There are a total of six types of coil 30 wires involved, namely: cross-winding between the first and second layers with a span of six... The first type of coil 30 in stator slot 11, the second type of coil 30 that is wound between the third and fourth layers with a span of six stator slots 11, the third type of coil 30 that is wound between the fifth and sixth layers with a span of six stator slots 11, the fourth type of coil 30 that is wound between the second and third layers with a span of six stator slots 11, the fifth type of coil 30 that is wound between the fourth and fifth layers with a span of six stator slots 11, and the sixth type of coil 30 that is wound in the first layer with a span of seven stator slots 11. A total of 24 coils 30 are involved, specifically as follows: The first coil 30 of U1 is embedded in the stator core 10 from the 6th layer of slot 10 and the 5th layer of slot 16; the positive phase lead of U1 is led out from the 6th layer of slot 10. The second coil 30 of U1 is embedded in the stator core 10 from the 6th layer of slot 22 and the 5th layer of slot 28. The third coil 30 of U1 is embedded in the stator core 10 from the 6th layer of slot 34 and the 5th layer of slot 40. The fourth coil 30 of U1 is embedded from the stator core 10 from slot 46... The stator core 10 is embedded in the 6th layer and the 5th layer of slot 4. The fifth coil 30 of U1 is embedded in the stator core 10 from the 4th layer of slot 10 and the 3rd layer of slot 16. The sixth coil 30 of U1 is embedded in the stator core 10 from the 4th layer of slot 22 and the 3rd layer of slot 28. The seventh coil 30 of U1 is embedded in the stator core 10 from the 4th layer of slot 34 and the 3rd layer of slot 40. The eighth coil 30 of U1 is embedded in the stator core from the 4th layer of slot 46 and the 3rd layer of slot 4. 10. The ninth coil 30 of U1 is embedded in the stator core 10 from the second layer of slot 10 and the first layer of slot 16. The tenth coil 30 of U1 is embedded in the stator core 10 from the second layer of slot 22 and the first layer of slot 28. The eleventh coil 30 of U1 is embedded in the stator core 10 from the second layer of slot 34 and the first layer of slot 40. The twelfth coil 30 of U1 is embedded in the stator core 10 from the second layer of slot 46 and the first layer of slot 4. The thirteenth coil 30 of U1 is embedded from... The stator core 10 is embedded in the first layer of slot 11 and the second layer of slot 5. Specifically, the thirteenth coil 30 and the twelfth coil 30 are welded to the lead-out side of the first layer to form a winding in the same layer. The span of this winding is seven stator slots 11. The fourteenth coil 30 of U1 is embedded in the stator core 10 from the first layer of slot 47 and the second layer of slot 41. The fifteenth coil 30 of U1 is embedded in the stator core 10 from the first layer of slot 35 and the second layer of slot 29.The sixteenth coil 30 of U1 is embedded into the stator core 10 from the first layer of slot 23 and the second layer of slot 17; the seventeenth coil 30 of U1 is embedded into the stator core 10 from the third layer of slot 11 and the fourth layer of slot 5; the eighteenth coil 30 of U1 is embedded into the stator core 10 from the third layer of slot 47 and the fourth layer of slot 41; the nineteenth coil 30 of U1 is embedded into the stator core 10 from the third layer of slot 35 and the fourth layer of slot 29; and the twentieth coil 30 of U1 is embedded into the stator core 10 from the third layer of slot 23 and the fourth layer of slot 17. 0. The 21st coil 30 of U1 is embedded into the stator core 10 from the 5th layer of slot 11 and the 6th layer of slot 5. The 22nd coil 30 of U1 is embedded into the stator core 10 from the 5th layer of slot 47 and the 6th layer of slot 41. The 23rd coil 30 of U1 is embedded into the stator core 10 from the 5th layer of slot 35 and the 6th layer of slot 29. The 24th coil 30 of U1 is embedded into the stator core 10 from the 5th layer of slot 23 and the 6th layer of slot 17. The negative phase lead of U1 is led out from the 6th layer of slot 17, completing the entire cross-line of this branch.

[0047] like Figure 4As shown, this is the first branch U2 of phase U. The forward cross-layer winding crosses from the outer layer to the inner layer of stator slot 11, and the reverse cross-layer winding crosses from the inner layer to the outer layer of stator slot 11. The same-layer winding crosses within the same layer of stator slot 11. The span of the coil 30 constituting the forward and reverse cross-layer windings is six stator slots 11, and the span of the same-layer winding coil 30 is seven stator slots 11. There are a total of six types of coil 30 wires involved, namely: cross-winding between the first and second layers with a span of six... The first type of coil 30 in stator slot 11, the second type of coil 30 that is wound between the third and fourth layers with a span of six stator slots 11, the third type of coil 30 that is wound between the fifth and sixth layers with a span of six stator slots 11, the fourth type of coil 30 that is wound between the second and third layers with a span of six stator slots 11, the fifth type of coil 30 that is wound between the fourth and fifth layers with a span of six stator slots 11, and the seventh type of coil 30 that is wound in the first layer with a span of five stator slots 11. A total of 24 coils 30 are involved, specifically as follows: The first coil 30 of U2 is embedded in the stator core 10 from the 6th layer of slot 11 and the 5th layer of slot 17; the positive phase lead of U2 is led out from the 6th layer of slot 11. The second coil 30 of U2 is embedded in the stator core 10 from the 6th layer of slot 23 and the 5th layer of slot 29. The third coil 30 of U2 is embedded in the stator core 10 from the 6th layer of slot 35 and the 5th layer of slot 41. The fourth coil 30 of U2 is embedded from the stator core 10 from slot 47... The stator core 10 is embedded in the 6th layer and the 5th layer of slot 5; the fifth coil 30 of U2 is embedded in the stator core 10 from the 4th layer of slot 11 and the 3rd layer of slot 17; the sixth coil 30 of U2 is embedded in the stator core 10 from the 4th layer of slot 23 and the 3rd layer of slot 29; the seventh coil 30 of U2 is embedded in the stator core 10 from the 4th layer of slot 35 and the 3rd layer of slot 41; and the eighth coil 30 of U2 is embedded in the stator core from the 4th layer of slot 47 and the 3rd layer of slot 5. 10. The ninth coil 30 of U2 is embedded in the stator core 10 from the second layer of slot 11 and the first layer of slot 17. The tenth coil 30 of U2 is embedded in the stator core 10 from the second layer of slot 23 and the first layer of slot 29. The eleventh coil 30 of U2 is embedded in the stator core 10 from the second layer of slot 35 and the first layer of slot 41. The twelfth coil 30 of U2 is embedded in the stator core 10 from the second layer of slot 47 and the first layer of slot 5. The thirteenth coil 30 of U2 is embedded from... The stator core 10 is embedded in the first layer of slot 10 and the second layer of slot 4. That is, the thirteenth coil 30 and the twelfth coil 30 are welded to the lead-out side of the first layer to form a winding in the same layer. The span of this winding is five stator slots 11. The fourteenth coil 30 of U2 is embedded in the stator core 10 from the first layer of slot 46 and the second layer of slot 40. The fifteenth coil 30 of U2 is embedded in the stator core 10 from the first layer of slot 34 and the second layer of slot 28.The sixteenth coil 30 of U2 is embedded into the stator core 10 from the first layer of slot 22 and the second layer of slot 16; the seventeenth coil 30 of U2 is embedded into the stator core 10 from the third layer of slot 10 and the fourth layer of slot 4; the eighteenth coil 30 of U2 is embedded into the stator core 10 from the third layer of slot 46 and the fourth layer of slot 40; the nineteenth coil 30 of U2 is embedded into the stator core 10 from the third layer of slot 34 and the fourth layer of slot 28; and the twentieth coil 30 of U2 is embedded into the stator core 10 from the third layer of slot 22 and the fourth layer of slot 16. The 21st coil 30 of U2 is embedded into the stator core 10 from the 5th layer of slot 10 and the 6th layer of slot 4; the 22nd coil 30 of U2 is embedded into the stator core 10 from the 5th layer of slot 46 and the 6th layer of slot 40; the 23rd coil 30 of U2 is embedded into the stator core 10 from the 5th layer of slot 34 and the 6th layer of slot 28; and the 24th coil 30 of U2 is embedded into the stator core 10 from the 5th layer of slot 22 and the 6th layer of slot 16. The negative phase lead of U2 is led out from the 6th layer of slot 16, completing the entire cross-line of this branch.

[0048] The V-phase winding is similar to the U-phase winding. The positive phase lead of V1 is led out from the 6th layer of slot 12, the negative phase lead of V1 is led out from the 6th layer of slot 19, the positive phase lead of V2 is led out from the 6th layer of slot 13, and the negative phase lead of V2 is led out from the 6th layer of slot 18.

[0049] The W-phase winding is similar to the U-phase winding. The positive terminal of W1 is led out from the 6th layer of slot 14, the negative terminal of W1 is led out from the 6th layer of slot 21, the positive terminal of W2 is led out from the 6th layer of slot 15, and the negative terminal of W2 is led out from the 6th layer of slot 20.

[0050] In summary, the phase leads 40 of each branch winding are all located in the sixth layer, that is, the outermost layer of stator slot 11, arranged sequentially from slot 10 to slot 21 of the sixth layer. Figure 5 , Figure 6 As shown, there are a total of seven types of coil 30, namely: a first type of coil 30 that is wound between the first and second layers with a span of six stator slots 11; a second type of coil 30 that is wound between the third and fourth layers with a span of six stator slots 11; a third type of coil 30 that is wound between the fifth and sixth layers with a span of six stator slots 11; a fourth type of coil 30 that is wound between the second and third layers with a span of six stator slots 11; a fifth type of coil 30 that is wound between the fourth and fifth layers with a span of six stator slots 11; a sixth type of coil 30 that is wound in the first layer with a span of seven stator slots 11; and a sixth type of coil 30 that is wound in the first layer with a span of five stator slots 11.

[0051] According to another specific embodiment of the present invention, a vehicle is provided, including a flat wire motor, wherein the flat wire motor is the flat wire motor in the above embodiment.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flat wire motor, characterized in that, include: Stator core (10), wherein a plurality of stator slots (11) are evenly distributed around the circumference of the stator core (10); The stator winding (20) has three phase windings disposed in the stator slot (11). Each phase winding has two parallel branch windings. The branch windings are formed by multiple coils (30) connected in series. The multiple coils (30) are connected in series to form a forward cross-layer winding, a reverse cross-layer winding and a same-layer winding. The same-layer winding is connected in series between the forward cross-layer winding and the reverse cross-layer winding. The forward cross-layer winding and the reverse cross-layer winding are arranged in parallel. The phase leads (40) of the stator winding (20) are continuously distributed in the stator slots (11) of the same layer; The span of the coil (30) in the forward cross-layer winding and the reverse cross-layer winding is six stator slots (11). The same layer winding is composed of one coil (30). The spans of the two same layer windings in the two parallel branch windings in the same phase are five stator slots (11) and seven stator slots (11), respectively. The phase leads (40) of the stator winding (20) are all located in the innermost layer of the stator slot (11) or in the outermost layer of the stator slot (11).

2. The flat wire motor according to claim 1, characterized in that, The branch winding has two phase leads (40), one of which is led out from the forward cross-layer winding, and the other of which is led out from the reverse cross-layer winding. The span between the two phase leads (40) is equal to the span of the same layer winding.

3. The flat wire motor according to claim 2, characterized in that, In the stator winding (20), the phase lead (40) drawn from the positive cross-layer winding is continuously distributed in the corresponding stator slot (11), and the phase lead (40) drawn from the reverse cross-layer winding is continuously distributed in the corresponding stator slot (11).

4. The flat wire motor according to claim 2, characterized in that, In the two branch windings of the same phase, the two phase leads (40) drawn from the positive cross-layer winding are arranged adjacent to each other, and the two phase leads (40) drawn from the reverse cross-layer winding are arranged adjacent to each other.

5. The flat wire motor according to claim 1, characterized in that, The span of the coils (30) in the forward cross-layer winding and the reverse cross-layer winding is equal, while the span of the two same-layer windings in the two parallel branch windings in the same phase is not equal.

6. The flat wire motor according to claim 1, characterized in that, The coils (30) in each of the forward cross-layer windings and each of the reverse cross-layer windings are cross-wound between two adjacent layers of the stator slot (11).

7. The flat wire motor according to claim 1, characterized in that, Each of the branch windings crosses over all of the stator slots (11) of the stator core (10).

8. A vehicle comprising a flat wire motor, characterized in that, The flat wire motor is the flat wire motor according to any one of claims 1-7.

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