Stator, flat wire motor, power assembly and vehicle

Abstract

The utility model relates to a stator, a flat wire motor, a power assembly and a vehicle, the stator comprises a stator core and a stator winding, the stator core is provided with a plurality of stator grooves, and the stator grooves axially penetrate through the stator core and are provided with first openings and second openings which are opposite to each other; the stator winding comprises multi-phase flat wire windings penetrating through the stator grooves, each phase of flat wire winding comprises a plurality of main branches which are staggered in the circumferential direction and arranged in parallel, and each main branch comprises a welding section located outside the first opening, a forming section located outside the second opening and an inserting section penetrating through the stator grooves. The first spans of the two stator slots where the two insertion sections connected to the two ends of each welding section are located are the same. According to the technical scheme, the stator provided by the utility model can realize the alignment arrangement of the welding point positions on the welding section side of the flat wire winding along the circumferential direction, and is convenient for field welding and clamping.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular, to a stator, a flat wire motor, a power assembly and a vehicle. Background Art

[0002] With the continuous development of new energy vehicles, the performance requirements for motors are getting higher and higher. In order to achieve a higher slot fill rate, the windings have also begun to develop from round wires to flat wires. The flat wire windings in flat wire motors are usually welded by hairpin flat wires plugged into the stator core. In related technologies, in order to weaken the impact of high-order harmonics on the performance of flat wire motors, winding connections are usually made in a short-distance manner. However, since the short-distance setting method is limited by the winding form, the welding point position on the welding end side of the hairpin flat wire is not aligned along the circumferential direction, which is not convenient for on-site welding and clamping. Utility Model Content

[0003] The purpose of the present disclosure is to provide a stator, a flat wire motor, a power assembly and a vehicle, which can realize the circumferential alignment of the welding points on the welding section side of the flat wire winding, facilitate on-site welding and clamping, so as to at least partially solve the above technical problems.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a stator, including a stator core and a stator winding; the stator core is provided with a plurality of stator slots, the stator slots axially penetrate the stator core and have a first opening and a second opening relative to each other; the stator winding includes a multi-phase flat wire winding passing through the plurality of stator slots, each phase of the flat wire winding includes a plurality of main branches that are circumferentially staggered and arranged in parallel, the main branch includes a welding section located outside the first opening, a forming section located outside the second opening, and a plug-in section passing through the stator slot, and the first span of the two stator slots where the two plug-in sections connected at both ends of each welding section are located is the same.

[0005] Optionally, a plurality of layers of the plug-in sections arranged in a radially stacked manner are provided in the stator slot, and the main branch includes a plurality of branch roads spaced circumferentially and arranged in series, in which the welding section, the plug-in section and the forming section are connected in sequence, so that the branch road connects two plug-in sections of different layers in two different stator slots counterclockwise through the welding section in the circumferential direction, and connects two plug-in sections of different layers in two different stator slots clockwise through the forming section.

[0006] Optionally, 2*e layers of plug-in segments are arranged in a radially stacked manner in the stator slot, wherein e is an odd number greater than or equal to 3, and in the branch path, the k-th layer of the plug-in segment in one of the stator slots is connected to the k-1-th layer of the plug-in segment in another stator slot through the forming section, and the second span between the k-th layer of the plug-in segment and the k-1-th layer of the plug-in segment is different from the first span, wherein k is any one of the odd numbers greater than or equal to 3 and less than 2*e.

[0007] Optionally, a difference between the first span and the second span is 1.

[0008] Optionally, the position of the welding point of each welding segment relative to the welding segment is the same.

[0009] Optionally, the main branch includes a plurality of hairpin flat wires, the hairpin flat wires include a forming section and plug-in sections respectively connected to both ends of the forming section, the ends of the plug-in sections are connected to sub-welding sections, the sub-welding sections are welded to another sub-welding section of the hairpin flat wire to form the welding section, and the welding point between the two sub-welding sections is a welding point.

[0010] Optionally, the number of the stator slots is n, the number of pole pairs of the stator is p, and the first span is n / 2p.

[0011] Optionally, the stator winding includes y-phase flat wire windings, each phase of the flat wire winding includes q main branches, and the number of stator slots n=y*2p*q.

[0012] Optionally, the routing manner of the multiple main branches connected in parallel in the flat wire winding of each phase is the same, and two adjacent main branches are arranged with a circumferential offset by one stator slot.

[0013] Optionally, the outer diameter of the stator core is 150-300 mm; and / or the slot length of the stator slot in the radial direction is 8-20 mm, and / or the slot width of the stator slot in the direction perpendicular to the radial and axial directions is 2-5 mm.

[0014] A second aspect of the present disclosure provides a flat wire motor, comprising a rotor and the above-mentioned stator, wherein the rotor is disposed in a receiving space surrounded by an inner wall of the stator core.

[0015] A third aspect of the present disclosure provides a power assembly, including a reducer and the above-mentioned flat wire motor, wherein the flat wire motor is drivingly connected to the reducer.

[0016] A fourth aspect of the present disclosure provides a vehicle comprising the above-mentioned powertrain.

[0017] Through the above technical solution, that is, the stator provided by the present invention, each phase flat wire winding is constructed to include a plurality of main branches that are staggered along the circumferential direction and arranged in parallel, and the first spans of the two stator slots where the two plug-in sections connected at both ends of each welding section in the main branch are located are the same, so as to ensure that the positions of the welding points on the welding section side of the flat wire winding are aligned along the circumferential direction, facilitate welding and clamping, and improve production efficiency.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of the stator welding end side in the related art;

[0021] Figure 2 yes Figure 1 A magnified view of position A in the middle;

[0022] Figure 3 is a schematic structural diagram of a stator provided in an exemplary embodiment of the present disclosure;

[0023] Figure 4 is a structural schematic diagram of a stator welding segment side provided in an exemplary embodiment of the present disclosure;

[0024] Figure 5 yes Figure 4 A magnified view of position B in the middle;

[0025] Figure 6 is a cross-sectional view of a stator provided in an exemplary embodiment of the present disclosure;

[0026] Figure 7 yes Figure 6 Enlarged view of the C position in the middle;

[0027] Figure 8 is a schematic diagram of an expanded flat wire winding provided in an exemplary embodiment of the present disclosure;

[0028] Fig. 9 is a schematic diagram of a main branch expansion of a flat wire winding provided in an exemplary embodiment of the present disclosure;

[0029] Fig.10 It is a structural schematic diagram of a hairpin flat wire provided by a first embodiment of the present disclosure;

[0030] Fig.11 It is a structural schematic diagram of a hairpin flat wire provided by a second embodiment of the present disclosure.

[0031] Description of Reference Numerals

[0032] 100- stator core; 110- stator slot; 120- first opening; 130- second opening; 200- stator winding; 210- flat wire winding; 220- main branch; 221- welding section; 2211- welding point; 222- forming section; 223- plug-in section; 224- branch; 225- hairpin flat wire; 226- sub-welding section; 300- welding end side; 400- welding point position. DETAILED DESCRIPTION

[0033] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0034] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0035] In the present disclosure, unless otherwise stated, "inside" and "outside" refer to the inside and outside of the outline of the corresponding component; "far" and "near" refer to the distance and nearness of the corresponding component in space relative to another component. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another element and do not have order and importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] The stator, the flat wire motor, the powertrain and the vehicle in the exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0037] The present disclosure provides a vehicle, which includes a powertrain. The vehicle may be, for example, a fuel vehicle, a gas vehicle, or a new energy vehicle.

[0038] The power assembly may include a reducer and a flat wire motor, and the flat wire motor is transmission-connected to the reducer.

[0039] Among them, since the flat wire winding in the flat wire motor in the related art is usually welded by a hairpin flat wire inserted into the stator core 100, in order to weaken the influence of high-order harmonics on the performance of the flat wire motor, the winding connection is usually short-distance. However, the short-distance setting method is limited by the winding form, such as Figure 1 and Figure 2 As shown, the welding point position 400 of the hairpin flat wire welding end side 300 is not aligned along the circumferential direction (such as Figure 2 It is not convenient for on-site welding and clamping.

[0040] In order to solve the problem that the welding point position 400 of the welding end side 300 of the hairpin flat wire in the flat wire motor is not aligned along the circumferential direction (such as Figure 2 As shown), in order to facilitate on-site welding and clamping and improve production efficiency, the present disclosure provides a flat wire motor, including a rotor and a stator. The flat wire motor can achieve the alignment of the welding points on the welding section side of the flat wire winding along the circumferential direction, which is convenient for on-site welding and clamping.

[0041] In the first embodiment, reference Figures 3 to 11 As shown, the stator of the flat wire motor includes a stator core 100 and a stator winding 200. The stator core 100 is provided with a plurality of stator slots 110. The stator slots 110 axially penetrate the stator core 100 and have a first opening 120 and a second opening 130 relative to each other. The stator winding 200 includes a multi-phase flat wire winding 210 passing through the plurality of stator slots 110. Each phase of the flat wire winding 210 includes a plurality of main branches 220 that are circumferentially staggered and arranged in parallel. The main branch 220 includes a welding section 221 located outside the first opening 120, a forming section 222 located outside the second opening 130, and a plug-in section 223 passing through the stator slot 110. The first span of the two stator slots 110 where the two plug-in sections 223 connected at both ends of each welding section 221 are located is the same.

[0042] Through the above technical solution, that is, the stator provided by the present disclosure, by constructing each phase flat wire winding 210 to include a plurality of main branches 220 that are staggered in the circumferential direction and arranged in parallel, and making the first spans of the two stator slots 110 where the two plug-in sections 223 connected at both ends of each welding section 221 in the main branch 220 are located the same, so as to ensure that the positions of the welding points 2211 on the welding section side of the flat wire winding 210 are aligned in the circumferential direction (such as Figure 5 As shown), it is convenient to implement a clamping operation on the welding point 2211 on the welding section side on site through, for example, a welding clamping tool (not shown), which facilitates welding clamping and improves production efficiency.

[0043] It should be noted that, in the related art, reference Figure 1 and Figure 2As shown, since the number of layers of hairpin flat wires in the stator slots of the flat wire motor stator in the related art is usually an even number of layers, for example, it can be 6 layers or 10 layers, and the existing hairpin flat wire structure usually includes a forming part and an insertion part respectively connected to the two ends of the forming part, and a sub-welding part is formed at the end of the insertion part, so that after the hairpin flat wire is inserted into the stator core 100, a welding part is formed by welding the sub-welding part of one hairpin flat wire with the sub-welding part of another hairpin flat wire. Since the short-distance position is usually set in the middle layer in the prior art, that is, it can be understood that, for example, when there are 6 layers of insertion parts of hairpin flat wires in the stator slot, the short-distance position is usually set between the 3rd layer and the 4th layer (for example, the welding part span between the insertion part of the 3rd layer of one stator slot and the insertion part of the 4th layer of another stator slot is different from the welding part or the forming part span between the other two connected insertion parts arranged in series along the radial direction. Specifically, for example, the welding part span between the insertion part of the 3rd layer and the insertion part of the 4th layer is 8, while the welding part of the insertion part of the 4th layer arranged in series along the radial direction is 10). The span of the welding part or the forming part between the other two connected insertion parts is 9, that is, it can be understood that the welding part between the insertion part of the third layer of one stator slot and the insertion part of the fourth layer of another stator slot is usually staggered by one slot to achieve a short-distance arrangement), and because the existing flat wire winding is wound, the hairpin flat wires of different layers are first connected in series along the radial direction of the stator core 100 in the same main branch, and then the hairpin flat wires in different stator slots are connected in series along the circumferential direction. This winding method will make the welding part connected between the insertion part of the third layer and the insertion part of the fourth layer (middle layer). In this way, when the short-distance position is set on the welding part, the span of the welding part of the flat wire winding will be different, so that the welding point position 400 between the third layer and the fourth layer is offset by 1 / 2 slot along the circumferential position relative to the welding point position 400 between the first layer and the second layer and the fifth layer and the sixth layer, resulting in the problem that the welding point position 400 of the welding end side 300 of the hairpin flat wire is not aligned along the circumferential direction (such as Figure 2 As shown in the figure, it increases the difficulty of on-site welding and clamping.

[0044] The stator of the flat wire motor provided by the present disclosure makes the first spans of the two stator slots 110 where the two plug-in sections 223 connected at both ends of each welding section 221 in the main branch 220 are located the same, that is, it can be understood that, compared with the prior art, the stator provided by the present disclosure can ensure that the positions of the welding points 2211 on the welding section side of the flat wire winding 210 are aligned along the circumferential direction (e.g. Figure 5 As shown), it is convenient to implement a clamping operation on the welding point 2211 on the welding section side on site through, for example, a welding clamping tool (not shown), which facilitates welding clamping and thereby improves production efficiency.

[0045] In the second embodiment, the stator of the flat wire motor includes all the features of the first embodiment. Figures 3 to 11 As shown, the positions of the welding points 2211 of each welding section 221 in the stator of the flat wire motor relative to the welding section 221 are the same, which is conducive to ensuring that the positions of the welding points 2211 on the welding section side of the flat wire winding 210 are aligned along the circumferential direction (such as Figure 5 As shown), it is convenient to implement a clamping operation on the welding point 2211 on the welding section side on site through, for example, a welding clamping tool (not shown), which facilitates welding clamping and improves production efficiency.

[0046] In the third embodiment, the stator of the flat wire motor includes all the features of the first or second embodiment above. Figures 3 to 11 As shown, the main branch 220 in the stator of the flat wire motor may include a plurality of hairpin flat wires 225, the hairpin flat wire 225 includes a forming section 222 and plug-in sections 223 respectively connected to both ends of the forming section 222, the ends of the plug-in section 223 are connected to a sub-welding section 226, the sub-welding section 226 is welded with the sub-welding section 226 of another hairpin flat wire 225 to form a welding section 221, and the welding point of the two sub-welding sections 226 is a welding point 2211, wherein, Fig.10 and Fig.11 Two types of hairpin flat wires 225 with two external structures are shown by way of example. Those skilled in the art can adaptively adjust the spans of the forming sections 222 and the sub-welding sections 226 of the hairpin flat wires 225 with the two external structures. The purpose is to ensure that the first spans of the two stator slots 110 where the two plug-in sections 223 connected at both ends of each welding section 221 are located are the same, while also ensuring that the short-distance position is set on the forming section 222 between the t-th layer plug-in section 223 and the t-1-th layer plug-in section 223 to achieve the purpose of weakening high-order harmonics (to be described below) and improving the performance of the flat wire motor. The present disclosure does not make any specific limitations here.

[0047] It should be noted that, since the existing hairpin flat wire structure usually includes a forming part and an insertion part respectively connected to the two ends of the forming part, and a sub-welding part is formed at the end of the insertion part, the welding point of the two sub-welding parts of the two hairpin flat wires is formed as a welding point position 400. Therefore, in order to ensure that the span of the welding end side 300 is 8 or 9, the span of the two connected sub-welding parts is usually constructed to be 4 or 4.5 to facilitate the forming and preparation of the hairpin flat wire and simplify the processing technology. In this way, based on the winding method and the short-distance position in the above-mentioned related technology, the welding point position 400 between the 3rd layer and the 4th layer will be staggered by 1 / 2 slot along the circumferential position relative to the welding point position 400 between the 1st layer and the 2nd layer and the 5th layer and the 6th layer, resulting in the problem of circumferential misalignment of the welding point position 400 of the welding end side 300 of the hairpin flat wire (such as Figure 2As shown), it is inconvenient to implement a clamping operation on the welding point position 400 of the welding end side 300 on site by, for example, a welding clamping tool (not shown), which increases the difficulty of on-site welding clamping.

[0048] The stator of the flat wire motor provided by the present disclosure can make the first spans of the two stator slots 110 where the two plug-in sections 223 connected at both ends of each welding section 221 in the main branch 220 are located the same, that is, it can ensure that when the span on the side of the welding section 221 is, for example, 9, the spans of the two connected sub-welding sections 226 can be configured to be, for example, 4.5, which can not only facilitate the molding and preparation of the hairpin flat wire and simplify the processing technology, but also ensure that the positions of the welding points 2211 on the welding section side of the flat wire winding 210 are aligned along the circumferential direction (such as Figure 5 As shown), it is convenient to implement a clamping operation on the welding point 2211 on the welding section side on site through, for example, a welding clamping tool (not shown), which facilitates welding clamping and improves production efficiency.

[0049] In the fourth embodiment, the stator of the flat wire motor includes the features of at least one of the above embodiments 1 to 3, with reference to Figures 3 to 9 As shown, a plurality of layers of plug-in sections 223 stacked in a radial direction may be provided in the stator slots 110 of the stator of the flat wire motor, and the main branch 220 includes a plurality of branch roads 224 spaced circumferentially and arranged in series. In the branch roads 224, the welding section 221, the plug-in section 223 and the forming section 222 are connected in sequence, so that the branch road 224 connects the two plug-in sections 223 of different layers in two different stator slots 110 in a counterclockwise direction through the welding section 221 in the circumferential direction, and connects the two plug-in sections 223 of different layers in two different stator slots 110 in a clockwise direction through the forming section 222, so as to ensure that the positions of the welding points 2211 on the welding section side of the flat wire winding 210 are aligned in the circumferential direction, which is convenient for welding and clamping and improves production efficiency.

[0050] It should be understood that clockwise and counterclockwise are relative, and depend on the perspective from which end to the other end along the axial direction of the stator core 100. For example, from the perspective of looking axially from the first opening 120 of the stator slot 110 to the second opening 130 of the stator slot 110, the welding section 221 is two plug-in sections 223 of different layers in two different stator slots 110 connected in a counterclockwise direction; and if looking axially from the second opening 130 of the stator slot 110 to the first opening 120 of the stator slot 110, the welding section 221 is two plug-in sections 223 of different layers in two different stator slots 110 connected in a counterclockwise direction. 20, the welding section 221 is connected in a clockwise manner to two plug-in sections 223 of different layers in two different stator slots 110, and the forming section 222 is connected in a counterclockwise manner to two plug-in sections 223 of different layers in two different stator slots 110. Therefore, the clockwise and counterclockwise involved in the present disclosure are only for the convenience of describing that in the same branch road 224, the extension direction of the welding section 221 and the forming section 222 can be approximately extended in the opposite direction, thereby forming a branch road 224 that is alternately connected back and forth.

[0051] In the embodiments provided in the present disclosure, reference is made to Figures 3 to 9 As shown, the stator slot 110 of the flat wire motor may be provided with 2*e layers of plug-in sections 223 stacked in a radial direction, wherein e is an odd number greater than or equal to 3, for example, e may be 3, 5, 7, etc., and the present disclosure exemplarily takes e as 3, that is, the stator slot 110 may be provided with 6 layers of plug-in sections 223 stacked in a radial direction for illustrative description, wherein, for the convenience of description, Figure 8 and Fig. 9 The six-layer plug-in sections 223 are numbered, for example, 1 to 6. Figure 7 As shown, the layer located at the innermost side (the side closest to the axis of the stator core 100) is the first layer, and the layers along the radial direction of the stator core 100 toward the outside are the second layer, the third layer, the fourth layer, the fifth layer and the sixth layer.

[0052] In addition, in the embodiments provided in the present disclosure, reference is made to Figure 8 and Fig. 9 As shown, the stator of the flat wire motor is in a branch 224, wherein a k-th plug-in segment 223 in one stator slot 110 is connected to a k-1-th plug-in segment 223 in another stator slot 110 through a forming segment 222, and a second span between the k-th plug-in segment 223 and the k-1-th plug-in segment 223 is different from the first span, wherein k is any one of odd numbers greater than or equal to 3 and less than 2*e. For example, when six layers of plug-in segments 223 are radially stacked in the stator slot 110, t can be, for example, 3 or 5, so, for example Figure 8 and Fig. 9It is shown by way of example that the second span between the fifth layer plug-in section 223 and the fourth layer plug-in section 223 can be made different from the first span, thereby avoiding the problem that, for example, the short-distance position needs to be set at the welding portion between the third layer and the fourth layer (intermediate layer) in the related art, so that the welding portion of the flat wire winding has a different span, resulting in the welding point position 400 of the hairpin flat wire welding end side 300 being misaligned along the circumferential direction (such as Figure 2 As shown in FIG. 1 , the present disclosure can ensure that the welding points 2211 on the welding section side of the flat wire winding 210 are aligned along the circumferential direction (as shown in FIG. 1 ). By setting the short distance position on the forming section 222 between the fifth layer plug-in section 223 and the fourth layer plug-in section 223, the welding points 2211 on the welding section side of the flat wire winding 210 are aligned along the circumferential direction (as shown in FIG. 1 ). Figure 5 As shown), it is convenient for welding and clamping, which improves production efficiency and can also weaken high-order harmonics and improve the performance of the flat wire motor. The present disclosure is not limited to this.

[0053] In the embodiments provided in the present disclosure, the number of pole pairs of the stator of the flat wire motor can be p, wherein the number of poles of the flat wire motor can be adaptively designed to be 2, 4, 6, 8, etc. according to the performance requirements of the flat wire motor, and correspondingly, the number of pole pairs p of the stator can be 1, 2, 3, 4, and the present disclosure does not make specific limitations on this.

[0054] In addition, the number of stator slots 110 may be n, the stator winding 200 includes y-phase flat wire windings 210, each phase flat wire winding 210 includes q main branches 220, and the number of stator slots 110 is n=y*2p*q. For example, Figures 3 to 11 As shown, the present disclosure is exemplarily described as follows: the stator winding 200 includes three-phase flat wire windings 210 , each phase flat wire winding 210 includes three main branches 220 , and the number of stator pole pairs is 3. As can be seen from the above, the number of stator slots 110 is 54.

[0055] In the embodiment provided by the present disclosure, the first span may be n / 2p, for example, Figure 8 and Fig. 9 It is shown in the example that the number of stator slots 110 can be 54, and the number of stator pole pairs is 3, so the first span can be 9. Of course, the specific embodiment of the first span is exemplary, and those skilled in the art can adaptively design the specific embodiment of the first span according to actual application requirements, the purpose of which is to ensure that the first spans of the two stator slots 110 where the two plug-in sections 223 connected at both ends of each welding section 221 are located are the same, so as to ensure that the positions of the welding points 2211 on the welding section side of the flat wire winding 210 are aligned along the circumferential direction (such as Figure 5 As shown), it is easy to weld and clamp.

[0056] In addition, in the embodiment provided by the present disclosure, the difference between the first span and the second span is 1, for example Figure 8 and Fig. 9It is exemplarily shown that the second span can be 8. Of course, in other embodiments not shown in the figure, when the first span is 9, the second span can also be 10. The present disclosure does not specifically limit such deformation methods, and those skilled in the art can design it adaptively according to actual application requirements.

[0057] also, Figure 8 and Fig. 9 It is exemplarily shown that the second span between the t-th layer plug-in segment 223 and the t-1-th layer plug-in segment 223 in different main branches 220 can be 8, and the spans between other plug-in segments 223 of different layers in different main branches 220 can be 9. The spans between the plug-in segments 223 of the same layer in different main branches 220 can be adaptively constructed as, for example, 11, 8, 8 or 10, 10, 7, respectively. The present disclosure does not specifically limit such deformation methods, and those skilled in the art can adaptively design them according to actual application requirements.

[0058] In the fifth embodiment, the stator of the flat wire motor includes the features of any of the above embodiments. Figure 6 and Figure 7 As shown, the inner wall of the stator core 100 of the flat wire motor can be provided with a plurality of stator slots 110 at equal intervals along the circumferential direction, and the rotor is disposed in the inner space surrounded by the stator core 100. Of course, in other embodiments not shown, the outer wall of the stator core 100 can also be provided with a plurality of stator slots 110 at equal intervals along the circumferential direction, and the stator core 100 is located in the inner space surrounded by the rotor. The present disclosure does not specifically limit such deformation modes, and those skilled in the art can design adaptively according to actual application requirements.

[0059] in, Figure 3 and Figure 4 It is exemplarily shown in the figure that the stator core 100 may be cylindrical, and the outer diameter d of the cylindrical stator core 100 may be, for example, 150 to 300 mm, and the structure is simple and easy to install and manufacture.

[0060] in addition, Figure 6 and Figure 7 It is exemplarily shown that the stator slot 110 can be rectangular, and the slot length a of the rectangular stator slot 110 along the radial direction can be, for example, 8 to 20 mm, and the slot width b of the rectangular stator slot 110 along the direction perpendicular to the radial and axial directions can be, for example, 2 to 5 mm, so as to facilitate installation and manufacturing while meeting the use requirements of the flat wire motor. Of course, the specific shape structure and structural dimensions of the centering core 100 and the stator slot 110 are exemplary, and those skilled in the art can design them adaptively according to actual application requirements. The present disclosure is not limited to this.

[0061] In addition, an insulating material, such as an insulating resin, may be provided in the stator slot 110 to form an insulating layer between the flat wire winding 210 and the stator core 100. In addition, the flat wire winding 210 may also be insulated on the outside, for example, insulating paper or insulating paint may be provided on the outside of the flat wire winding 210, and the end of the flat wire winding 210 may be coated with insulating powder, but the present disclosure is not limited thereto, and those skilled in the art may design it adaptively according to actual application requirements.

[0062] In the sixth embodiment, the stator of the flat wire motor includes the features of any of the above embodiments. Figure 8 and Fig. 9 As shown, the routing mode of the multiple parallel main branches 220 in each phase flat wire winding 210 of the stator of the flat wire motor is the same, and two adjacent main branches 220 are arranged circumferentially offset by one stator slot 110. The specific number of the above-mentioned multi-phase flat wire winding 210 and the multiple parallel main branches 220 is not specifically limited in this disclosure, and those skilled in the art can design them adaptively according to actual application requirements. For example, Figure 8 and Fig. 9 As shown, the flat wire winding 210 of the present disclosure may include a three-phase flat wire winding, and each phase of the flat wire winding includes three main branches 220 that are staggered circumferentially and arranged in parallel. Of course, the above-mentioned specific embodiment of the flat wire winding 210 is exemplary. In other embodiments, the multi-phase flat wire winding may also be more phases, such as two phases, four phases, five phases, or six phases. The number of the above-mentioned main branches 220 may also be adaptively adjusted to, for example, two, four, five, or more phases, but the present disclosure is not limited to this.

[0063] Based on the above stator pole pair number p being 3, the number n of the stator slots 110 being 54, the flat wire winding 210 includes a three-phase flat wire winding, each phase of the flat wire winding includes three main branches 220 that are circumferentially staggered and arranged in parallel, and a specific embodiment of a 6-layer plug-in section 223 that is radially stacked can be provided in the stator slot 110. The present disclosure exemplarily describes the routing method of a main branch 220 of a flat wire winding of one phase in the three-phase flat wire winding (since the three-phase flat wire winding can correspond to the U-phase flat wire winding, the V-phase flat wire winding and the W-phase flat wire winding, respectively, and since the routing methods of the three can be the same, the present disclosure exemplarily describes the routing method of a main branch 220 of one of the flat wire windings, and the routing methods of the other two-phase flat wire windings can be arranged according to the same routing method), as follows:

[0064] For the sake of convenience, reference Figure 8 and Fig. 9 As shown, the 54 stator slots 110 are numbered, for example, 1 to 54, where Figure 8 and Fig. 9Each column in represents a stator slot 110, and the side where the stator slot 110 is located is the inner wall side of the stator core 100, Figure 8 and Fig. 9 The “○” in the figure represents the plug-in section 223 extending outward from the drawing surface in the stator slot 110, the “×” represents the plug-in section 223 extending inward from the drawing surface, the solid line connecting the “○” and “×” represents the molded section 222 located outside the second opening 130 of the stator slot 110, and the dotted line connecting the “○” and “×” represents the welding section 221 located outside the first opening 120 of the stator slot 110.

[0065] It should be noted that the routing method of the forming segment 222 represented by the solid line connecting the “○” and “×” can be achieved through mold forming or CNC and other processes in actual production. In addition, the routing method of the welding segment 221 represented by the dotted line connecting the “○” and “×” can be achieved through separation, twisting, welding and other processes in actual production. The present disclosure does not elaborate on this. Those skilled in the art can choose any process known in the field for forming and preparation according to actual application requirements.

[0066] refer to Figure 8 and Fig. 9, take the 6th layer plug-in section 223 (hereinafter referred to as 20-6, the abbreviations of other positions refer to this example) of the 20th stator slot 110 as the starting point, jump to 11-5 at the welding section 221, jump to 19-4 at the forming section 222, jump to 10-3 at the welding section 221, jump to 19-2 at the forming section 222, jump to 10-1 at the welding section 221, jump to 1-1 at the forming section 222, jump to 10-2 at the welding section 221, The forming section 222 is connected to 1-3, the welding section 221 is connected to 10-4, the forming section 222 is connected to 2-5, the welding section 221 is connected to 11-6, the forming section 222 is connected to 3-6, the welding section 221 is connected to 48-5, the forming section 222 is connected to 2-4, the welding section 221 is connected to 47-3, the forming section 222 is connected to 2-2, the welding section 221 is connected to 47-1, the forming section 222 is connected to Connect to 38-1, jump to 47-2 at welding section 221, jump to 38-3 at forming section 222, jump to 47-4 at welding section 221, jump to 39-5 at forming section 222, jump to 48-6 at welding section 221, jump to 40-6 at forming section 222, jump to 31-5 at welding section 221, jump to 39-4 at forming section 222, jump to 30-3 at welding section 221, jump to 3 at forming section 222 9-2, the welding section 221 is connected to 30-1, the forming section 222 is connected to 21-1, the welding section 221 is connected to 30-2, the forming section 222 is connected to 21-3, the welding section 221 is connected to 30-4, the forming section 222 is connected to 22-5, and the welding section 221 is connected to 31-6 as the end point to form a main branch 220. The other two main branches 220 are connected in the same routing method to form a main branch 220. Figure 8 The multiple main branches 220 shown are staggered in the circumferential direction and arranged in parallel, which will not be described in detail in this disclosure.

[0067] It should be noted that the above starting and ending points can be equivalent to obtaining a set of lead wires at any point on the same main branch 220 as the starting and ending points of the flat wire winding, and the present disclosure does not specifically limit this. And the lead wires at the above starting and ending points can be connected to, for example, copper bars.

[0068] Based on the above, the flat wire motor provided by the present disclosure is provided with the above-mentioned stator so that the welding points on the side of the flat wire winding welding section can be aligned along the circumferential direction, which is convenient for on-site welding and clamping while also improving production efficiency. In addition, the flat wire motor also has all the beneficial effects of the above-mentioned stator, which will not be repeated in this disclosure. In addition, the powertrain provided by the present disclosure has all the beneficial effects of the above-mentioned flat wire motor, which will not be repeated in this disclosure. In addition, the vehicle provided by the present disclosure also has all the beneficial effects of the above-mentioned powertrain, which will not be repeated in this disclosure.

[0069] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0070] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0071] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A stator, characterized in that: including a stator core and a stator winding; The stator core is provided with a plurality of stator slots, the stator slots penetrate the stator core in the axial direction and have a first opening and a second opening opposite to each other; The stator winding includes a multi-phase flat wire winding passing through the multiple stator slots, each phase of the flat wire winding includes a plurality of main branches that are circumferentially staggered and arranged in parallel, the main branches include a welding section located outside the first opening, a forming section located outside the second opening, and a plug-in section passing through the stator slot, and the first span of the two stator slots where the two plug-in sections connected at both ends of each welding section are located is the same.

2. The stator according to claim 1, characterized in that: A plurality of layers of the plug-in sections stacked in a radial direction are arranged in the stator slots, and the main branch includes a plurality of branch roads spaced circumferentially and arranged in series. In the branch roads, the welding section, the plug-in section and the forming section are connected in sequence, so that the branch road connects two plug-in sections of different layers in two different stator slots in a counterclockwise direction through the welding section in the circumferential direction, and connects two plug-in sections of different layers in two different stator slots in a clockwise direction through the forming section.

3. The stator according to claim 2, characterized in that: The stator slot is provided with 2*e layers of plug-in segments stacked in a radial direction, wherein e is an odd number greater than or equal to 3. In the branch path, the k-th layer of the plug-in segment in one of the stator slots is connected with the k-1-th layer of the plug-in segment in another stator slot through the forming segment, and the second span between the k-th layer of the plug-in segment and the k-1-th layer of the plug-in segment is different from the first span, wherein k is any one of the odd numbers greater than or equal to 3 and less than 2*e.

4. The stator according to claim 3, characterized in that: A difference between the first span and the second span is 1.

5. The stator according to claim 1, characterized in that: The welding point of each welding segment has the same position relative to the welding segment.

6. The stator according to claim 1 or 5, characterized in that: The main branch includes a plurality of hairpin flat wires, each of which includes a forming section and plug-in sections respectively connected to both ends of the forming section, the ends of the plug-in sections are connected to sub-welding sections, the sub-welding sections are welded to another sub-welding section of the hairpin flat wire to form the welding section, and the welding point between the two sub-welding sections is a welding point.

7. The stator according to claim 1, characterized in that: The number of the stator slots is n, the number of pole pairs of the stator is p, and the first span is n / 2p.

8. The stator according to claim 1 or 7, characterized in that: The stator winding includes y-phase flat wire windings, each phase flat wire winding includes q main branches, and the number of stator slots n=y*2p*q.

9. The stator according to claim 1, characterized in that: The routing mode of the plurality of main branches connected in parallel in the flat wire winding of each phase is the same, and two adjacent main branches are arranged circumferentially offset by one stator slot.

10. The stator according to claim 1, characterized in that The outer diameter of the stator core is 150-300 mm; and / or The slot length of the stator slot along the radial direction is 8 to 20 mm, and / or the slot width of the stator slot along the direction perpendicular to the radial direction and the axial direction is 2 to 5 mm.

11. A flat wire motor, characterized in that: It comprises a rotor and the stator according to any one of claims 1 to 10, wherein the rotor is arranged in a containing space surrounded by the inner wall of the stator core.

12. A powertrain, characterized in that: It comprises a reducer and the flat wire motor according to claim 11, wherein the flat wire motor is drivingly connected to the reducer.

13. A vehicle, characterized in that: Includes the powertrain as claimed in claim 12.

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