Winding wiring structure of motor, vehicle-mounted motor and electric vehicle

Abstract

The invention provides a winding wiring structure of a motor, a vehicle-mounted motor and an electric vehicle. In the same branch of the winding wiring structure of the motor, each linear part corresponds to an order, so that the smaller the distance between the linear part and the voltage input end in electrical connection is, the smaller the order is. The linear parts of the plurality of wires included in each phase of winding shunt are divided into q linear part sets, the sequence corresponding to each linear part of each branch in each linear part set is continuous, the sequence ranges corresponding to the plurality of linear parts of each branch in each linear part set are the same, and the X-th linear part set in the q linear part sets is equal to the X-th linear part set in the q linear part sets, and the X-th linear part set in the q linear part sets is equal to the X-th linear part set in the q linear part sets. According to the technical scheme of the utility model, the linear parts are uniformly arranged in the Yth stator slot corresponding to each pole, so that the order difference of the linear parts in each stator slot corresponding to each pole is small, the voltage difference between two adjacent linear parts in the same stator slot can be reduced, the consumption of insulating materials is further reduced, the height of the stator slot is reduced, and the performance of the motor is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a winding connection structure for a motor, an on-board motor, and an electric vehicle. Background Technology

[0002] As the voltage platform of electric vehicle drive motors gradually increases from 400V to 800V and SiC devices are increasingly used in on-board motor platforms, the potential in the motor windings also increases accordingly. Typically, the wires of the motor windings are arranged with certain intervals in the stator slots, and these intervals are generally filled with multiple layers of insulating varnish and a small amount of air. The insulating varnish is used to insulate against the inter-turn voltage of the on-board motor.

[0003] Currently, when designing vehicle motors, if the stator slot is relatively tall, one or two layers of insulating paper are added between the insulating varnish films. This ensures the effectiveness of inter-turn insulation, but it increases the amount of insulating paper used and the height of the stator slot, resulting in a narrower stator yoke and increased magnetic reluctance. Consequently, the temperature of the vehicle motor is higher, reducing its performance. Summary of the Invention

[0004] This application provides a winding connection structure for an electric motor, an electric motor, and an electric vehicle, to solve the problem in the prior art that, under the premise of high operating voltage and ensuring inter-turn insulation of stator slots, the amount of insulation material used increases, resulting in a narrower stator yoke and increased magnetic reluctance of the vehicle motor, which in turn leads to higher temperature of the vehicle motor and reduced performance.

[0005] In a first aspect, this application provides a winding connection structure for an electric motor. The winding connection structure includes a stator core and a star connection structure. The star connection structure includes m phase windings, each phase winding includes b parallel branches, and m≥3, b≥1. Each branch includes multiple wires connected in series, with the first wire connected to the voltage input terminal of the motor and the last wire connected to the three-phase star point of the star connection structure. Each wire includes a bent portion and two straight portions. The bent portion is connected between the two straight portions. In the same branch, each straight portion has a corresponding order. The smaller the electrical connection distance between the straight portion and the voltage input terminal, the smaller the order. Multiple stator slots are provided along the circumference of the stator core. Each stator slot includes a layers along the inner diameter direction of the stator core, and a≥4.

[0006] The number of stator slots corresponding to each pole is q, and q = Z / 2pm, where Z is the total number of stator slots, 2pm is the number of poles of the stator core, and m is the number of phases. The straight sections of multiple conductors contained in each phase winding are divided into q sets of straight sections. The order of each straight section in each branch of each set of straight sections is continuous, and the order range of multiple straight sections in each branch of each set of straight sections is the same. The Xth set of straight sections in the q sets of straight sections is evenly distributed into the Yth stator slot corresponding to each pole.

[0007] In some implementations, when q=3, each branch is included in the number of straight sections in each set of straight sections by 2ap / b, and the order range of the straight sections corresponding to the first set of straight sections is... The order range corresponding to the straight parts in the second set of straight parts is: The order range corresponding to the straight parts in the third set of straight parts is:

[0008] In some implementations, when b=2, a=8, m=3, Z=54 and 2p=6, the maximum difference in the order of the corresponding straight segments in the same set of straight segments is less than 24.

[0009] In some implementations, when b=2, a=8, m=3, Z=54 and 2p=6, the number of straight sections included in each set of straight sections for each branch is 24, the order range of the straight sections corresponding to each branch in the first set of three sets of straight sections is 1-24, the order range of the straight sections corresponding to each branch in the second set of three sets of straight sections is 25-48, and the order range of the straight sections corresponding to each branch in the third set of three sets of straight sections is 49-72.

[0010] In some implementations, when q=2, the number of straight sections included in each set of straight sections for each branch is a2p / b, the order range of the straight sections corresponding to each branch in the first set of straight sections is [1, ap / b], and the order range of the straight sections corresponding to each branch in the second set of straight sections is [ap / b+1, a2p / b].

[0011] In some implementations, when b=2, a=8, m=3, Z=48 and 2p=8, the maximum difference in the order of the corresponding straight segments in the same set of straight segments is less than 32.

[0012] In some implementations, when b=2, a=8, m=3, Z=48 and 2p=8, the order range of the straight sections corresponding to each branch in the first set of straight sections is [1, 32], and the order range of the straight sections corresponding to each branch in the second set of straight sections is [33, 64].

[0013] In some embodiments, each straight section is located in one layer of a stator slot, and an insulating layer is provided between two adjacent straight sections in the same stator slot.

[0014] In some implementations, if a / b is an integer, the winding method of each phase winding group on multiple stator slots is either a same-layer wave winding method or a cross-layer wave winding method.

[0015] In some implementations, if a / b is not an integer, the winding method in which each phase winding is distributed across multiple stator slots is a cross-layer wave winding method.

[0016] In some implementations, the number N of conductors included in each branch satisfies the formula N = aZ / 2bm.

[0017] In some implementations, each stator slot includes 8 layers along the inner diameter of the stator core, the number of stator slots arranged along the circumference of the stator core is Z=54, the number of parallel branches included in each phase winding group is b=2, and the star connection structure includes 3 phase winding groups, then N=36.

[0018] In some implementations, when m=3, the three-phase windings are arranged in a 60-degree phase band configuration.

[0019] Secondly, this application also provides an electric motor, including the winding connection structure of the electric motor provided in the first aspect of this application.

[0020] In some implementations, the motor is a flat wire motor.

[0021] Thirdly, this application also provides an electric vehicle equipped with the motor provided in the second aspect of this application.

[0022] This application provides a winding connection structure for an electric motor, an electric motor, and an electric vehicle. In the winding connection structure of the electric motor, each straight section in the same branch has a corresponding order; the smaller the electrical distance between the straight section and the voltage input terminal, the smaller the order. Furthermore, the straight sections of multiple conductors in each phase winding branch are divided into q sets of straight sections, and the order of each straight section in each branch within each set is continuous, with the same range of order for multiple straight sections in each branch within each set. The Xth set of straight sections in the q sets is evenly distributed into the Yth stator slot corresponding to each pole. This results in a smaller order difference between the straight sections in each stator slot corresponding to each pole, reducing the voltage difference between adjacent straight sections in the same stator slot. This allows for a reduction in the amount of insulation material used, reducing costs while maintaining motor reliability. It also allows for a wider stator yoke in the stator core, reducing magnetic reluctance, lowering the motor's operating temperature, and improving motor performance; or, without changing the amount of insulation material used, improving motor reliability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A circuit diagram of a star-connected structure provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the wire provided in an embodiment of this application;

[0026] Figure 3 A schematic diagram showing the order of the straight sections of a single branch in an embodiment of this application is provided;

[0027] Figure 4 This is a schematic diagram of the stator slot structure provided in an embodiment of this application;

[0028] Figure 5 A schematic diagram of the winding method when each phase winding is branched onto multiple stator slots in the embodiments of this application is a same-layer wave winding method;

[0029] Figure 6 A winding diagram for an embodiment of this application where each phase winding is branched onto multiple stator slots in a cross-layer wave winding configuration;

[0030] Figure 7This is a schematic diagram showing the distribution of the straight portions of multiple conductors included in each phase winding circuit of this application on the stator core. Detailed Implementation

[0031] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0032] The accompanying drawings illustrate various structural schematics according to embodiments of the present disclosure. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0033] In the context of this disclosure, when a layer / element is referred to as being "above" another layer / element, the layer / element may be directly above the other layer / element, or there may be an intermediate layer / element between them. Additionally, if a layer / element is "above" another layer / element in one orientation, then when the orientation is reversed, the layer / element may be "below" the other layer / element.

[0034] The technical solutions of this application and how they solve the aforementioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0035] This application provides a winding connection structure for a motor, which includes a stator core and a star connection structure. The motor can be, but is not limited to, a flat-wire motor. A flat-wire motor is a type of motor that uses flat conductor windings with a rectangular cross-section instead of traditional round conductor windings. It can ensure high power density and efficiency through optimized winding structure and is widely used in electric vehicles.

[0036] For example, the star connection structure includes m phase windings, each phase winding includes b parallel branches, and m ≥ 3, b ≥ 1. In this embodiment, m = 3, but m can also be other integer values ​​greater than 3, which is not limited here; b = 2, but b can also be other integer values ​​greater than or equal to 1, which is not limited here. The circuit diagram of the star connection structure can be as follows: Figure 1 As shown.

[0037] Each branch circuit consists of multiple wires connected in series, with the first wire connected to the voltage input terminal of the motor and the last wire connected to the three-phase star point of the star connection structure. For example... Figure 2 As shown, each wire includes a bent portion 102 and two straight portions 101, with the bent portion 102 connecting the two straight portions 101. Figure 3 As shown, in the same branch, each straight section 101 corresponds to a sequence. The smaller the electrical connection distance between the straight section 101 and the voltage input terminal, the smaller the sequence, and the higher the corresponding voltage. Multiple stator slots 103 are arranged along the circumference of the stator core. Each stator slot 103 includes a layers along the inner diameter direction of the stator core, where a ≥ 4. In the embodiments of this application, as... Figure 4 As shown, when a = 8, the stator slot 103 includes layers A, B, C, D, E, F, G, and H from the slot opening to the bottom. Alternatively, a can also be 4 or 6, which is not limited here.

[0038] It should be noted that the number of conductors N in each branch satisfies the formula N = aZ / 2bm. For example, if the number of layers in each stator slot 103 along the inner diameter of the stator core is a = 8, the number of stator slots 103 arranged along the circumference of the stator core is Z = 54, the number of parallel branches in each phase winding group is b = 2, and the star connection structure includes 3 phase winding groups, then N = 36.

[0039] It should be noted that the number of stator slots 103 corresponding to each pole is q, and q = Z / 2pm, where Z is the total number of stator slots 103, 2pm is the number of poles of the stator core, and m is the number of phases. The straight sections 101 of multiple conductors in each phase winding are divided into q sets of straight sections. The order of the straight sections 101 in each branch of each set is continuous, and the order range of the multiple straight sections 101 in each branch of each set is the same. The Xth set of straight sections in the q sets is evenly distributed into the Yth stator slot 103 corresponding to each pole. X can be equal to Y or not, and this is not limited here.

[0040] For example, when Z = 54, 2P = 6, and m = 3, q ​​= 3, that is, the straight section 101 of multiple conductors contained in each phase winding is divided into 3 sets of straight sections; when Z = 36, 2p = 6, and m = 3, q ​​= 2, that is, the straight section 101 of multiple conductors contained in each phase winding is divided into 2 sets of straight sections.

[0041] In some implementations, when q = 3, the number of straight sections 101 included in each set of straight sections for each branch is 2pa / b, and the order range of the straight sections 101 corresponding to each branch in the first set of straight sections is... The order range of each branch corresponding to line segment 101 in the second set of straight segments is: The order range of each branch corresponding to line segment 101 in the third set of straight segments is: It can be seen that the maximum difference in the order of the corresponding straight lines in the same set of straight lines is less than 1.

[0042] For example, with b=2, a=8, m=3, Z=54, and 2p=6, each branch contains 24 straight sections 101 from each set of straight sections. The order range of the straight sections 101 in the first set of three sets is 1-24, the order range of the straight sections 101 in the second set is 25-48, and the order range of the straight sections 101 in the third set is 49-72. It can be seen that the maximum difference in the order of the straight sections within the same set is less than 24.

[0043] As can be seen from the above, the maximum difference in the order of the straight sections 101 within the same set of straight sections is less than 24. This ensures that the order difference of the straight sections 101 within each stator slot 103 corresponding to each pole is small, which reduces the voltage difference between two adjacent straight sections 101 within the same stator slot 103. This, in turn, reduces the amount of insulation material used, lowers the height of the stator slot 103, widens the stator yoke of the stator core, reduces magnetic reluctance, lowers the operating temperature of the motor, and improves the performance of the motor. Furthermore, with the amount of insulation material remaining constant, the reliability of the motor can be improved; or, by appropriately reducing the amount of insulation material, the cost can be reduced while maintaining the reliability of the motor.

[0044] In other embodiments, when q=2, the number of straight sections 101 included in each set of straight sections for each branch is 2pa / b, the order range of the straight sections 101 corresponding to each branch in the first set of straight sections is [1, ap / b], and the order range of the straight sections 101 corresponding to each branch in the second set of straight sections is [ap / b+1, 2pa / b].

[0045] For example, when b=2, a=8, m=3, Z=48 and 2p=8, the order range of the straight sections corresponding to each branch in the first set of straight sections is [1, 32], and the order range of the straight sections corresponding to each branch in the second set of straight sections is [33, 64].

[0046] As can be seen from the above, the maximum difference in the order of the straight sections 101 within the same set of straight sections is less than 32. This ensures that the order difference of the straight sections 101 within each stator slot 103 corresponding to each pole is small, meaning the voltage difference within each stator slot 103 is small. This reduces the voltage difference between two adjacent straight sections 101 within the same stator slot 103. Thus, by reducing the amount of insulation material, the stator yoke of the stator core can be widened, reducing magnetic reluctance, lowering the motor's operating temperature, and improving motor performance. Alternatively, with the amount of insulation material remaining constant, the reliability of the motor can be improved.

[0047] It should be noted that each straight section 101 is located in one layer of a stator slot 103, and an insulating layer is provided between two adjacent straight sections 101 in the same stator slot 103. Understandably, since the voltage difference within each stator slot 103 is small, the thickness of the insulating layer can be set to be relatively low, thereby achieving good insulation and reducing the amount of insulating material used between two adjacent straight sections 101 in the same stator slot 103.

[0048] In some implementations, if a / b is an integer, the winding method of each phase winding group on multiple stator slots 103 is either a same-layer wave winding method or a cross-layer wave winding method. For example, when a = 8 and b = 2, a / b is an integer. The winding method of each phase winding group on multiple stator slots 103 is a same-layer wave winding method. The same-layer wave winding method can be as follows: Figure 5 As shown, Figure 5 The total number of stator slots Z is 54. The dashed line represents the bent portion 102 of the conductor, and the solid line represents the straight portion 101 of the conductor. Figure 5 In this configuration, the bent portion 102 of the conductor connects from layer A of the second stator slot 103 to layer B of the eleventh stator slot 103; the straight portion 101 of the conductor connects from layer B of the eleventh stator slot 103 to layer A of the twentieth slot; the bent portion 102 of the conductor connects from layer A of the twentieth stator slot 103 to layer B of the 29th slot; the straight portion 101 of the conductor connects from layer B of the 29th stator slot 103 to layer A of the 38th slot; the bent portion 102 of the conductor connects from layer A of the 38th stator slot 103 to layer B of the 47th slot; and the straight portion 101 of the conductor connects from layer B of the 47th stator slot 103 to layer C of the second slot.

[0049] In other embodiments, if a / b is not an integer, the winding method of each phase winding group distributed across multiple stator slots 103 is a cross-layer wave winding method. For example, when a = 8 and b = 3, a / b is not an integer. The winding method of each phase winding group distributed across multiple stator slots 103 is a cross-layer wave winding method, wherein the cross-layer wave winding method can be as follows... Figure 6As shown, Figure 6 The dashed line represents the bent portion 102 of the conductor, and the solid line represents the straight portion 101 of the conductor. Figure 6 The specific connection relationships of the mid-span wave windings can be referred to the above. Figure 4 The explanation of the same-layer wave winding method will not be repeated here.

[0050] In some implementations, when m=3, the three-phase windings are arranged in a 60-degree phase band configuration. This ensures that each stator slot contains only windings from the same phase.

[0051] Below, when the stator core includes 54 slots, 6 poles, and 8 layers, and the star connection structure includes 3-phase winding circuits, with each phase winding circuit including 2 parallel branches, combined with... Figure 7 This section explains how the straight section 101 of the multiple conductors contained in each phase winding circuit is specifically allocated and configured.

[0052] As mentioned above, each stator slot contains only windings from the same phase. Therefore, during analysis, it is only necessary to analyze the winding distribution of any one phase. The winding distributions of the other two phases are exactly the same as the phase being analyzed, and the analysis results can be directly applied, so they will not be elaborated here. Below, we will use the A-phase winding of the stator core as an example for illustration. For example... Figure 7 As shown, since q = Z / 2pm, the number of slots corresponding to each pole of the A-phase winding of the stator core is q = 54 / 6 × 3 = 3. Figure 7 The first pole corresponds to stator slot 1 (i.e., the first stator slot corresponding to the first pole), stator slot 2 (i.e., the second stator slot corresponding to the first pole), and stator slot 3 (i.e., the third stator slot corresponding to the first pole). Figure 7 The second pole corresponds to stator slot 11 (i.e., the first stator slot corresponding to the second pole), stator slot 12 (i.e., the second stator slot corresponding to the first pole), and stator slot 13 (i.e., the first stator slot corresponding to the second pole). Figure 7 The third pole corresponds to stator slot 19 (i.e., the first stator slot corresponding to the third pole), stator slot 20 (i.e., the second stator slot corresponding to the third pole), and stator slot 21 (i.e., the first stator slot corresponding to the third pole), and so on.

[0053] It should be noted that, in Figure 7In each stator slot 103, from layer A to layer H, the pink area represents a straight section 101 of the first branch, and the green area represents a straight section 101 of the second branch. The number of the pink area represents the consecutive sequence of the straight sections 101 of the first branch. For example, the straight section 101 with the number 1 in layer A of the second slot connects to the straight section 101 with the number 2 in layer B of the 11th slot, the straight section 101 with the number 2 in layer B of the 11th slot connects to the straight section 101 with the number 3 in layer A of the 20th slot, and so on. The numbers in the green area represent the consecutive sequence of the straight sections 101 of the second branch. For example, the straight section 101 with the number 1 in the H layer of the second slot connects to the straight section 101 with the number 2 in the G layer of the 47th slot, the straight section 101 with the number 2 in the G layer of the 47th slot connects to the straight section 101 with the number 3 in the H layer of the 38th slot, and so on.

[0054] For example, the straight section 101 of multiple conductors included in each phase winding branch is divided into 3 sets of straight sections. The number N of conductors included in each branch satisfies the formula N = aZ / 2bm, then N = 8 × 54 / 2 × 2 × 3, N = 36, and the number of straight sections 101 included in each branch is 72.

[0055] Each branch is included in 24 straight sections 101 in each set of straight sections. The order range of the straight sections 101 in the first set of three straight sections for each branch is 1-24. The order range of the straight sections 101 in the second set of three straight sections for each branch is 25-48. The order range of the straight sections 101 in the third set of three straight sections for each branch is 49-72.

[0056] from Figure 7 As can be seen, the sequence range of the straight section 101 in the first stator slot 103 corresponding to each pole is 1-24; the sequence range of the straight section 101 in the first stator slot 103 corresponding to each pole is 25-48; the sequence range of the straight section 101 in the first stator slot 103 corresponding to each pole is 49-72; the maximum difference in the sequence of the straight section 101 in each stator slot 103 is 22 (less than 23), which appears in slots 3, 10, 11, 25, 46, and 47.

[0057] When q = 3, for any stator slot 103, the theoretical maximum difference in the winding order of the straight section 101 within the stator slot 103 is N / 3 - 1, while the winding order difference is N - 1. Therefore, the ratio of the voltage difference within each stator slot 103 to the original theoretical maximum voltage difference holds by the following inequality: It is evident that the voltage difference has decreased by at least [percentage missing]. Similarly, it can be deduced that when q=2, the ratio of the voltage difference in each stator slot 103 to the original theoretical maximum voltage difference is 1 / 2, indicating that the voltage difference has decreased by at least [percentage missing].

[0058] In addition, this application also provides a motor, including the winding connection structure of the motor provided in the above embodiments of this application. In some embodiments, the above-described motor is a flat wire motor.

[0059] In addition, this application also provides an electric vehicle equipped with the motor provided in the above embodiments of this application.

[0060] In summary, the embodiments of this application provide a winding connection structure for a motor, a motor, and an electric vehicle. Because each straight section 101 in the same branch of the motor winding connection structure has a corresponding order, the smaller the electrical distance between the straight section 101 and the voltage input terminal, the smaller the order. Furthermore, the straight sections 101 of multiple conductors included in each phase winding branch are divided into q sets of straight sections, and the order of each straight section 101 in each branch of each set of straight sections is continuous, and the order range of multiple straight sections 101 in each branch of each set of straight sections is the same. The Xth set of straight sections in the q sets of straight sections is evenly distributed into the Yth stator slot 103 corresponding to each pole. This allows for a smaller sequence difference between the linear sections 101 within each stator slot 103 corresponding to each pole, reducing the voltage difference between two adjacent linear sections within the same stator slot 103. Consequently, the amount of insulation material can be appropriately reduced, thereby lowering costs while maintaining motor reliability. Furthermore, it allows for a wider stator yoke in the stator core, reducing magnetic reluctance, lowering the motor's operating temperature, and improving motor performance. Alternatively, it can enhance motor reliability while maintaining the same amount of insulation material.

[0061] The above description does not provide detailed technical specifications regarding the structure of each layer. However, those skilled in the art should understand that layers and regions of desired shapes can be formed using various technical means. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Additionally, although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be advantageously combined.

[0062] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0063] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A winding connection structure for an electric motor, characterized in that, The motor winding connection structure includes a stator core and a star connection structure. The star connection structure includes m phase windings, each phase winding includes b parallel branches, and m≥3, b≥1. Each branch includes multiple wires connected in series, with the first wire connected to the voltage input terminal of the motor and the last wire connected to the three-phase star point of the star connection structure. Each wire includes a bent portion and two straight portions. The bent portion is connected between the two straight portions. In the same branch, each straight portion has a corresponding order. The smaller the electrical distance between the straight portion and the voltage input terminal, the smaller the order. Multiple stator slots are arranged along the circumference of the stator core. Each stator slot includes a layers along the inner diameter direction of the stator core, and a≥4. The number of stator slots corresponding to each pole is q, and q = Z / 2pm, where Z is the total number of stator slots, 2pm is the number of poles of the stator core, and m is the number of phases. The straight sections of multiple conductors included in each phase winding branch are divided into q sets of straight sections, and the order of each straight section in each branch of each set of straight sections is continuous, and the order range of multiple straight sections in each branch of each set of straight sections is the same. The Xth set of straight sections in the q sets of straight sections is evenly distributed into the Yth stator slot corresponding to each pole.

2. The structure according to claim 1, characterized in that, When q = 3, the number of straight sections included in each of the straight section sets for each branch is 2pa / b, and the order range of the straight sections corresponding to each branch in the first straight section set is... The order range of the straight sections corresponding to each branch in the second set of straight sections is: The order range of the straight sections corresponding to each branch in the third set of straight sections is:

3. The structure according to claim 2, characterized in that, When b=2, a=8, m=3, Z=54 and 2p=6, the maximum difference in the order of the corresponding straight parts in the same set of straight parts is less than 24.

4. The structure according to claim 2, characterized in that, When b=2, a=8, m=3, Z=54 and 2p=6, each branch is included in 24 straight sections in each set of straight sections. The order range of the straight sections corresponding to each branch in the first set of three sets of straight sections is 1-24. The order range of the straight sections corresponding to each branch in the second set of three sets of straight sections is 25-48. The order range of the straight sections corresponding to each branch in the third set of three sets of straight sections is 49-72.

5. The structure according to claim 1, characterized in that, When q=2, the number of straight sections included in each set of straight sections for each branch is 2pa / b, the order range of the straight sections corresponding to each branch in the first set of straight sections is [1, ap / b], and the order range of the straight sections corresponding to each branch in the second set of straight sections is [ap / b+1, 2pa / b].

6. The structure according to claim 5, characterized in that, When b=2, a=8, m=3, Z=48 and 2p=8, the maximum difference in the order of the corresponding straight parts in the same set of straight parts is less than 32.

7. The structure according to claim 5, characterized in that, When b=2, a=8, m=3, Z=48 and 2p=8, the order range of the straight section corresponding to each branch in the first straight section set is [1, 32], and the order range of the straight section corresponding to each branch in the second straight section set is [33, 64].

8. The structure according to claim 1, characterized in that, Each of the linear sections is located in one layer of a stator slot, and an insulating layer is provided between two adjacent linear sections in the same stator slot.

9. The structure according to claim 1, characterized in that, If a / b is an integer, then the winding method of each phase winding group on the multiple stator slots is either the same-layer wave winding method or the cross-layer wave winding method.

10. The structure according to claim 1, characterized in that, If a / b is not an integer, then the winding method of each phase winding group on the multiple stator slots is the cross-layer wave winding method.

11. The structure according to claim 1, characterized in that, The number of conductors N in each branch satisfies the formula N = aZ / 2bm.

12. The structure according to claim 11, characterized in that, The number of layers included in each stator slot along the inner diameter direction of the stator core is a = 8, the number of stator slots arranged along the circumference of the stator core is Z = 54, the number of parallel branches included in each phase winding group is b = 2, and the star connection structure includes 3 phase winding groups, then N = 36.

13. The structure according to claim 1, characterized in that, When m=3, the three-phase windings are arranged in a 60-degree phase band configuration.

14. An electric motor, characterized in that, The motor includes the winding connection structure of the motor according to any one of claims 1-13.

15. The motor according to claim 14, characterized in that, The motor is a flat wire motor.

16. An electric vehicle, characterized in that, The motor described in claim 14 or 15 is installed.

Images