Flat wire stator assembly and flat wire motor

Abstract

The invention relates to a flat wire stator assembly and a flat wire motor, the flat wire stator assembly comprises a stator core and multi-phase flat wire windings, the stator core is provided with a plurality of winding grooves, each phase of flat wire winding comprises a plurality of connected continuous wires, and each continuous wire comprises a first winding segment, a transition straight line segment and a second winding segment which are connected in sequence. The winding directions of the first winding section and the second winding section are opposite, and at least parts of the first winding section and the second winding section are overlapped; the transition linear segment is embedded in the winding groove, and the first winding segment and the second winding segment are wound in the circumferential direction of the stator core at a set span. By arranging the continuous wire, the continuous wire can be firstly bent into a preset shape, then the transition straight line section can be directly embedded in the winding groove, and finally the first winding section and the second winding section are wound in the circumferential direction of the stator iron core at the set span and embedded in the winding groove, so that the stator formed by inserting the wire according to the method has fewer welding points, and the welding quality of the stator is improved. The length of the welding end is short, the time occupied by welding is saved, the quality can be effectively guaranteed, and the assembling efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a flat wire stator assembly and a flat wire motor. Background Art

[0002] At present, with the development of electric vehicle technology, flat wire hairpin motors, also known as flat wire motors, have high efficiency and high power density, so they are currently the focus of attention in the industry. The drive motor is mainly composed of a stator assembly, a rotor assembly, an end cover and auxiliary standard parts, and the stator winding includes an iron core, a copper wire winding, and insulating materials. As the name suggests, a flat wire motor uses flat copper wire in the stator winding. The difference between a flat wire motor and a round wire motor lies in the way the copper wire is formed. Flat wire is conducive to improving the slot fill rate of the motor. Generally, the slot fill rate of a round wire motor is about 40%, while the slot fill rate of a flat wire motor can reach more than 60%. The increase in the slot fill rate means that more copper wire can be filled in without changing the space, generating a stronger magnetic field strength and improving the power density.

[0003] In the related art, the flat wire motor first makes the winding into a hairpin-like shape, inserts it into the stator slot, and then welds the end of the hairpin at the other end. The above winding method easily leads to multiple wire types, a large number of end welding points, complex welding process, difficult quality assurance, long welding end length, and reduced efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a flat wire stator assembly and a flat wire motor with fewer welding points and shorter welding end length, which greatly saves the time occupied by welding, can effectively ensure the quality, and can improve the assembly efficiency.

[0005] A flat wire stator assembly, comprising:

[0006] A stator core, wherein the stator core has a plurality of winding slots, and the plurality of winding slots are arranged at intervals along the circumference of the stator core;

[0007] A multi-phase flat wire winding, wherein the multi-phase flat wire winding is embedded in the winding slot at intervals, and each phase of the flat wire winding comprises a plurality of connected continuous wires, wherein the continuous wire comprises a first winding segment, a transition straight line segment and a second winding segment connected in sequence, wherein the winding direction of the first winding segment is opposite to that of the second winding segment, and the first winding segment and the second winding segment are at least partially overlapped;

[0008] The transition straight line segment is embedded in the winding slot, and the first winding segment and the second winding segment are wound along the circumference of the stator core with a set span and embedded in the winding slot.

[0009] In one embodiment, the first winding segment and the second winding segment each include a plurality of straight segments, the straight segments of the first winding segment and the straight segments of the second winding segment at least partially overlap, and two adjacent straight segments are embedded in different winding grooves with the set span.

[0010] In one embodiment, the first winding segment includes a first straight line segment and a first folded line segment overlapped along a first direction, each of the first folded line segments is connected to two adjacent first straight line segments, and two adjacent first folded line segments are spaced apart on both sides of the first straight line segment; two adjacent first straight line segments are parallel to each other, and two adjacent first straight line segments are embedded in different winding grooves with the set span;

[0011] And / or, the second winding segment includes a second folded line segment and a second straight line segment overlapped along the second direction, each of the second folded line segments is connected to two adjacent second straight line segments, and two adjacent second folded line segments are spaced apart on both sides of the second straight line segment; two adjacent second straight line segments are parallel to each other, and two adjacent second straight line segments are embedded in different winding grooves with the set span.

[0012] In one embodiment, the second straight line segment is arranged corresponding to the remaining first straight line segments except the first straight line segment at the head, and the second straight line segment is arranged overlapping with the first straight line segment facing it.

[0013] In one embodiment, the first winding segment further includes a first lead-out segment, which is connected to the free end of the first straight line segment at the head of the first winding segment; the second winding segment further includes a second lead-out segment, which is connected to the free end of the second straight line segment at the tail of the second winding segment, and the first lead-out segment and the second lead-out segment are arranged at the set span interval.

[0014] In one embodiment, the first lead-out section and the second lead-out section are led out from the same side of the stator core, and each winding slot is provided with a lead-out section.

[0015] In one embodiment, the first fold line segment has a first height H1, and the first height H1 of different first fold line segments is different; the second fold line segment has a second height H2, and the second height H2 of different second fold line segments is different.

[0016] In one embodiment, the first fold line segment and the second fold line segment both include a first connecting segment and a second connecting segment that are symmetrically arranged, and there is an angle between the first connecting segment and the second connecting segment.

[0017] In one embodiment, the plane where the free ends of the first connecting segment and the second connecting segment are located is a first plane, and the plane where the connection between the first connecting segment and the second connecting segment is located is a second plane; the distance between the first plane and the second plane of the first fold line segment forms the first height H1; the distance between the first plane and the second plane of the second fold line segment forms the second height H2.

[0018] The present application also provides a flat wire motor, which includes the flat wire stator assembly as described above.

[0019] In the above scheme, by setting a continuous wire, the continuous wire can be bent into a preset shape first, and then the transition straight line segment can be directly embedded in the winding groove, and finally the first winding segment and the second winding segment are wound along the circumference of the stator core with a set span and embedded in the winding groove. The stator formed by wire embedding according to this method has fewer welding points and a shorter length of the welding end, which greatly saves the time occupied by welding, can effectively ensure quality, and can improve assembly efficiency. At the same time, the motor has the characteristics of high reliability, low impact of unbalanced current, high efficiency, and high power density. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] FIG1 is a schematic structural diagram of a flat wire stator assembly according to an embodiment of the present application.

[0023] FIG. 2 is a schematic structural diagram of an outer core shown in an embodiment of the present application.

[0024] FIG. 3 is a schematic structural diagram of an inner core shown in an embodiment of the present application.

[0025] FIG. 4 is a top view of a continuous conductive line according to an embodiment of the present application.

[0026] FIG. 5 is a schematic structural diagram of a continuous conductive wire according to an embodiment of the present application.

[0027] FIG. 6 is a schematic diagram of the structure of the inner iron core and the continuous conductor when they are embedded, as shown in an embodiment of the present application.

[0028] FIG. 7 is a schematic diagram of a top view of the structure of an inner iron core and a continuous conductor when embedded, as shown in an embodiment of the present application.

[0029] FIG. 8 is a schematic diagram of the structure of the inner iron core and the continuous conductor after the wire embedding is completed according to an embodiment of the present application.

[0030] FIG. 9 is a schematic structural diagram of a stator core and a flat wire winding according to an embodiment of the present application.

[0031] Description of Reference Numerals

[0032] 10. Flat wire stator assembly; 100. Stator core; 110. Winding slot; 120. Inner core; 130. Outer core; 200. Flat wire winding; 210. Continuous conductor; 211. First winding segment; 2111. First straight segment; 2112. First folded line segment; 2113. First lead-out segment; 212. Transition straight segment; 213. Second winding segment; 2131. Second straight segment; 2132. Second folded line segment; 2133. Second lead-out segment; 2134. First connecting segment; 2135. Second connecting segment; 300. Bridge wire; 400. Wiring and bus terminals. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] In view of the above problems, referring to FIG. 1 , FIG. 2 and FIG. 9 , the embodiment of the present application relates to a flat wire stator assembly 10, including a stator core 100 and a multi-phase flat wire winding 200. The stator core 100 has a plurality of winding slots 110, and the plurality of winding slots 110 are arranged at intervals along the circumferential direction of the stator core 100. The multi-phase flat wire winding 200 is embedded in the winding slots 110 at intervals.

[0040] Please refer to Figures 1, 2 and 3. The stator core 100 includes an inner core 120 and an outer core 130. The outer wall of the inner core 120 is provided with a plurality of protrusions, which are arranged at intervals along the circumference of the inner core 120. A winding groove 110 is formed between two adjacent protrusions. The inner wall of the outer core 130 is provided with an interlocking groove that matches the shape of the winding groove 110. The inner core 120 and the outer core 130 are interlocked as a whole through the protrusions and the interlocking grooves. Specifically, the winding groove 110 is arranged through the inner core 120. It should be noted that the stator core 100 is a rotating body and has a hollow cylindrical structure.

[0041] Please refer to Figures 1, 4, 5, 6 and 7. The multi-phase flat wire winding 200 is embedded in the winding slot 110 at intervals. Each phase flat wire winding 200 includes a plurality of connected continuous wires 210. The continuous wire 210 includes a first winding segment 211, a transition straight segment 212 and a second winding segment 213 connected in sequence. The winding direction of the first winding segment 211 is opposite to that of the second winding segment 213, and the first winding segment 211 and the second winding segment 213 are at least partially overlapped. The transition straight segment 212 is embedded in the winding slot 110. The first winding segment 211 and the second winding segment 213 are wound along the circumference of the stator core 100 with a set span and embedded in the winding slot 110.

[0042] Specifically, the continuous wire 210 is an integrally formed structure. The number of continuous wires 210 connected in parallel to the N-phase flat wire winding 200 is an integer multiple of N, so as to avoid inductance imbalance and prevent circulating current loss. Exemplarily, the number of continuous wires 210 connected in parallel to the three-phase flat wire winding 200 is an integer multiple of three. Specifically, the number of continuous wires 210 connected in parallel to each phase flat wire winding 200 is 3, 6, or 9.

[0043] Please refer to Figures 4, 5, 6, 7 and 8. During winding, the transition straight line segment 212 is first embedded in the innermost layer of the winding slot 110, and then the first winding segment 211 and the second winding segment 213 are wound along the circumference of the stator core 100 from the innermost layer of the winding slot 110 to the outermost layer of the winding slot 110. It should be noted that the continuous wire 210 is embedded in the winding slot 110 by rotating the stator core 100 or the continuous wire 210 in the same direction. Each winding slot 110 has multiple winding layers, and the multiple winding layers are arranged and distributed along the radial direction of the stator core 100.

[0044] By setting the continuous wire 210, the continuous wire 210 can be bent into a preset shape first, and then the transition straight line segment 212 can be directly embedded in the winding groove 110. Finally, the first winding segment 211 and the second winding segment 213 are wound circumferentially along the stator core 100 with a set span and embedded in the winding groove 110. The stator formed by wire embedding in this way has fewer welding points and a shorter length of the welding end, which greatly saves the time occupied by welding, can effectively ensure quality, and can improve assembly efficiency. At the same time, the motor has the characteristics of high reliability, low impact of unbalanced current, high efficiency, and high power density.

[0045] Please refer to Figures 1, 4 and 5. According to some embodiments of the present application, optionally, the first winding segment 211 and the second winding segment 213 each include a plurality of straight line segments, the straight line segments of the first winding segment 211 and the straight line segments of the second winding segment 213 at least partially overlap, and two adjacent straight line segments are embedded in different winding grooves 110 with a set span.

[0046] It should be noted that: the present application does not limit the setting of the span, which can be set according to actual use requirements. For example, the span between two adjacent straight segments along the winding direction of the flat wire winding 200 is 9 winding slots 110. In this embodiment, the span is set to 9 winding slots 110.

[0047] Please refer to FIG. 1 , FIG. 4 and FIG. 5 , according to some embodiments of the present application, optionally, the first winding segment 211 includes a first straight segment 2111 and a first folded line segment 2112 that are overlapped along a first direction, each first folded line segment 2112 is connected to two adjacent first straight segments 2111, and two adjacent first folded line segments 2112 are spaced apart on both sides of the first straight segment 2111. Two adjacent first straight segments 2111 are parallel to each other, and two adjacent first straight segments 2111 are embedded in different winding grooves 110 with a set span.

[0048] 1, 4 and 5, the second winding segment 213 includes a second folded line segment 2132 and a second straight line segment 2131 which are overlapped along the second direction, each second folded line segment 2132 is connected to two adjacent second straight line segments 2131, and two adjacent second folded line segments 2132 are spaced apart on both sides of the second straight line segment 2131. Two adjacent second straight line segments 2131 are parallel to each other, and two adjacent second straight line segments 2131 are embedded in different winding grooves 110 with a set span.

[0049] Specifically, the first fold line segment 2112 of the tail is connected to one end of the transition straight line segment 212. The second fold line segment 2132 of the head is connected to the other end of the transition straight line segment 212. It should be noted that the number of the first straight line segment 2111, the first fold line segment 2112, the second fold line segment 2132 and the second straight line segment 2131 is not limited in this application and can be set according to the required winding layer. The number of layers in the winding layer of each winding groove 110 is the same. Exemplarily, in this embodiment, the number of layers in the winding layer of each winding groove 110 is 6 layers. In other embodiments, the number of layers in the winding layer of each winding groove 110 can be any even number of layers.

[0050] Referring to FIG. 1 , FIG. 4 and FIG. 5 , according to some embodiments of the present application, optionally, the second straight line segment 2131 is arranged corresponding to the first straight line segment 2111 other than the first straight line segment 2111 at the head, and the second straight line segment 2131 is arranged overlapping with the first straight line segment 2111 facing the second straight line segment 2111. In other words, the middle portion of the continuous wire 210 is a double-layer structure, and the end portions of the continuous wire 210 at both ends are single-layer structures.

[0051] In this embodiment, the number of first straight line segments 2111 is 6, and they are sequentially arranged along the first direction. The number of second straight line segments 2131 is 5, and they are sequentially arranged along the second direction, and only the first straight line segment 2111 at the head is a single-layer structure. The remaining first straight line segments 2111 correspond to the second straight line segments 2131 one by one, and are overlapped.

[0052] Referring to FIG. 1 , FIG. 4 and FIG. 5 , according to some embodiments of the present application, optionally, the first winding segment 211 further includes a first lead-out segment 2113, and the first lead-out segment 2113 is connected to the free end of the first straight segment 2111 at the head of the first winding segment 211. The second winding segment 213 further includes a second lead-out segment 2133, and the second lead-out segment 2133 is connected to the free end of the second straight segment 2131 at the tail of the second winding segment 213. The first lead-out segment 2113 and the second lead-out segment 2133 are arranged at a set span interval.

[0053] Specifically, the first lead-out section 2113 and the second lead-out section 2133 are led out from the same side of the stator core 100, and each winding slot 110 is evenly provided with a lead-out section. By leading the first lead-out section 2113 and the second lead-out section 2133 out from the same side of the stator core 100, the space at the end of the stator core 100 can be saved, and each winding slot 110 is evenly provided with a lead-out section, so that the distribution of each phase branch in the magnetic field space is very uniform, so that the circulation influence between each branch is very small.

[0054] The flat wire stator assembly 10 of the flat wire winding 200 further includes a bridge wire 300 , a wiring and bus terminal 400 , wherein the bridge wire 300 is used for line connection between the continuous wires 210 , and the wiring and bus terminal 400 is used for multi-phase neutral point connection and each phase lead-out line connection.

[0055] 1 , 4 and 5 , according to some embodiments of the present application, optionally, the first fold line segment 2112 has a first height H1, and different first fold line segments 2112 have different first heights H1. The second fold line segment 2132 has a second height H2, and different second fold line segments 2132 have different second heights H2.

[0056] Specifically, the first fold line segment 2112 and the second fold line segment 2132 both include a first connecting segment 2134 and a second connecting segment 2135 that are symmetrically arranged, and there is an angle between the first connecting segment 2134 and the second connecting segment 2135. The plane where the free ends of the first connecting segment 2134 and the second connecting segment 2135 are located is the first plane, and the plane where the first connecting segment 2134 and the second connecting segment 2135 are connected is the second plane. The distance between the first plane and the second plane of the first fold line segment 2112 forms a first height H1. The distance between the first plane and the second plane of the second fold line segment 2132 forms a second height H2.

[0057] In other embodiments, the first heights H1 of the plurality of first fold line segments 2112 are the same, and the second heights H2 of the plurality of second fold line segments 2132 are the same.

[0058] The present application takes a three-phase 54-slot 6-pole 6-layer flat wire 3-way parallel flat wire winding 200 as an example, and the winding layers increase from the innermost layer of the winding slot 110 to the outermost layer of the winding slot 110. Specifically, the winding layers of the winding slot 110 are a, b, c, d, e, and f, and the three phases include U phase, V phase, and W phase, and the number of ways for each phase is 3.

[0059] Among them, the winding route of the first path of phase U is as follows: 1a→10b→19c→28d→37e→46f→1f→46e→37d→28c→19b→10a→20a→29b→38c→47d→2e→11f→20f→11e→2d→47c→38b→29a→39a→48b→3c→12d→21e→30f→39f→30e→21d→12c→3b→48a.

[0060] The winding route of the second path of phase U is as follows: 2a→11b→20c→29d→38e→47f→2f→47e→38d→29c→20b→11a→21a→30b→39c→48d→3e→12f→21f→12e→3d→48c→39b→30a→37a→46b→1c→10d→19e→28f→37f→28e→19d→10c→1b→46a.

[0061] The winding route of the third path of phase U is as follows: 3a→12b→21c→30d→39e→48f→3f→48e→39d→30c→21b→12a→19a→28b→37c→46d→1e→10f→19f→10e→1d→46c→37b→28a→38a→47b→2c→11d→20e→29f→38f→29e→33d→11c→2b→47a.

[0062] The winding route of the first path of phase W is as follows: 7a→16b→25c→34d→43e→52f→7f→52e→43d→34c→25b→16a→26a→35b→44c→53d→8e→17f→26f→17e→8d→53c→44b→35a→45a→54b→9c→18d→27e→36f→45f→36e→27d→18c→9b→54a.

[0063] The winding route of the second path of phase W is as follows: 8a→17b→26c→35d→44e→53f→8f→53e→44d→35c→26b→17a→27a→36b→45c→54d→9e→18f→27f→18e→9d→54c→45b→36a→43a→52b→7c→16d→25e→34f→43f→34e→25d→16c→7b→52a.

[0064] The winding route of the third path of phase W is as follows: 9a→18b→27c→36d→45e→54f→9f→54e→45d→36c→27b→18a→25a→34b→43c→52d→7e→16f→25f→16e→7d→52c→43b→34a→44a→53b→8c→17d→26e→35f→44f→35e→26d→17c→8b→53a.

[0065] The winding route of the first V phase is as follows: 13a→22b→31c→40d→49e→4f→13f→4e→49d→40c→31b→22a→32a→41b→50c→5d→14e→23f→32f→23e→14d→5c→50b→41a→51a→6b→15c→24d→33e→42f→51f→42e→33d→24c→15b→6a.

[0066] The winding route of the second V phase is as follows: 14a→23b→32c→41d→50e→5f→14f→5e→50d→41c→32b→23a→33a→42b→51c→6d→15e→24f→33f→24e→15d→6c→51b→42a→49a→4b→13c→22d→31e→40f→49f→40e→31d→22c→13b→4a.

[0067] The winding route of the third path of phase V is as follows: 15a→24b→33c→42d→51e→6f→15f→6e→51d→42c→33b→24a→31a→40b→49c→4d→13e→22f→31f→22e→13d→4c→49b→40a→50a→5b→14c→23d→32e→41f→50f→41e→32d→23c→14b→5a.

[0068] A flat wire motor includes the flat wire stator assembly 10 as described above.

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A flat wire stator assembly, characterized in that: include: A stator core, wherein the stator core has a plurality of winding slots, and the plurality of winding slots are arranged at intervals along the circumference of the stator core; A multi-phase flat wire winding, wherein the multi-phase flat wire winding is embedded in the winding slot at intervals, and each phase of the flat wire winding comprises a plurality of connected continuous wires, wherein the continuous wire comprises a first winding segment, a transition straight line segment and a second winding segment connected in sequence, wherein the winding direction of the first winding segment is opposite to that of the second winding segment, and the first winding segment and the second winding segment are at least partially overlapped; The transition straight line segment is embedded in the winding slot, and the first winding segment and the second winding segment are wound along the circumference of the stator core with a set span and embedded in the winding slot.

2. The flat wire stator assembly according to claim 1, characterized in that: The first winding segment and the second winding segment each include a plurality of straight segments, the straight segments of the first winding segment and the straight segments of the second winding segment at least partially overlap, and two adjacent straight segments are embedded in different winding grooves with the set span.

3. The flat wire stator assembly according to claim 1, characterized in that: The first winding segment includes a first straight line segment and a first folded line segment overlapping along a first direction, each of the first folded line segments is connected to two adjacent first straight line segments, and two adjacent first folded line segments are spaced apart and arranged on both sides of the first straight line segment; two adjacent first straight line segments are parallel to each other, and two adjacent first straight line segments are embedded in different winding grooves with the set span; And / or, the second winding segment includes a second folded line segment and a second straight line segment overlapped along the second direction, each of the second folded line segments is connected to two adjacent second straight line segments, and two adjacent second folded line segments are spaced apart on both sides of the second straight line segment; two adjacent second straight line segments are parallel to each other, and two adjacent second straight line segments are embedded in different winding grooves with the set span.

4. The flat wire stator assembly according to claim 3, characterized in that: The second straight line segment is arranged corresponding to the remaining first straight line segments except the first straight line segment at the head, and the second straight line segment is arranged overlapping with the first straight line segment directly facing it.

5. The flat wire stator assembly according to claim 3, characterized in that: The first winding segment also includes a first lead-out segment, which is connected to the free end of the first straight segment at the head of the first winding segment; the second winding segment also includes a second lead-out segment, which is connected to the free end of the second straight segment at the tail of the second winding segment, and the first lead-out segment and the second lead-out segment are arranged at the set span interval.

6. The flat wire stator assembly according to claim 5, characterized in that: The first lead-out section and the second lead-out section are led out from the same side of the stator core, and each winding slot is provided with a lead-out section.

7. The flat wire stator assembly according to claim 3, characterized in that: The first fold line segment has a first height H1, and the first height H1 of different first fold line segments is different; the second fold line segment has a second height H2, and the second height H2 of different second fold line segments is different.

8. The flat wire stator assembly according to claim 7, characterized in that: The first fold line segment and the second fold line segment both include a first connecting segment and a second connecting segment that are symmetrically arranged, and an angle is formed between the first connecting segment and the second connecting segment.

9. The flat wire stator assembly according to claim 8, characterized in that: The plane where the free ends of the first connecting segment and the second connecting segment are located is the first plane, and the plane where the connection between the first connecting segment and the second connecting segment is located is the second plane; the distance between the first plane and the second plane of the first folded line segment forms the first height H1; the distance between the first plane and the second plane of the second folded line segment forms the second height H2.

10. A flat wire motor, characterized in that: The flat wire motor comprises the flat wire stator assembly according to any one of claims 1 to 9.

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