An electric machine and a high slot fill factor stator thereof

Abstract

The application discloses a motor and a high-slot-filling-ratio stator thereof, and relates to the technical field of motors. The high-slot-filling-ratio stator comprises a core, a plurality of insulation skeletons and a plurality of windings; wherein the core comprises an outer sleeve, an inner sleeve and a plurality of winding teeth, the outer sleeve is sleeved outside the inner sleeve, and there is an annular chamber between the outer sleeve and the inner sleeve; the winding teeth are detachably connected to the outer sleeve and the inner sleeve, and the plurality of winding teeth are arranged at intervals and uniformly around the center line of the core; the plurality of windings are arranged outside the corresponding insulation skeletons, and the plurality of insulation skeletons are sleeved outside the corresponding winding teeth; and the slot filling ratio of the stator is relatively high.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more specifically, to a motor and its high slot fill factor stator. Background Technology

[0002] The fixed part of a motor is called the stator. Currently, stators generally adopt a multi-slot design, that is, multiple winding slots are opened in the integral iron core. The integral iron core refers to an iron core with the same structure and design goals. During winding, the winding is wound on the outside of the structure between adjacent winding slots and passes through the winding slots. However, in order to improve the electromagnetic performance and efficiency of the motor and reduce noise, the slot opening of the winding slot usually cannot be too large. This often increases the difficulty and quality of winding, resulting in a low slot fill factor of the stator.

[0003] In conclusion, how to improve the stator slot fill factor is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a high slot fill factor stator, which has a high slot fill factor.

[0005] Another object of this application is to provide an electric motor including the above-mentioned high slot fill factor stator.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A high slot fill factor stator includes: an iron core, several insulating frames, and several windings;

[0008] The iron core includes an outer sleeve, an inner sleeve, and a plurality of winding teeth. The outer sleeve is fitted over the outer sleeve, and there is an annular cavity between the outer sleeve and the inner sleeve. The winding teeth are detachably connected to the outer sleeve and the inner sleeve, and the plurality of winding teeth are arranged at intervals and evenly around the center line of the iron core.

[0009] Several windings are wound around the outside of the corresponding insulating frame, and several insulating frames are sleeved around the outside of the corresponding winding teeth.

[0010] Preferably, the inner side of a plurality of the winding teeth has a first engaging portion, and the outer periphery of the inner sleeve has a plurality of second engaging portions;

[0011] One of the first latching part and the second latching part is a latching groove and the other is a latching block, and both the first latching part and the second latching part are equal cross-section structures extending along the axial direction of the iron core.

[0012] Preferably, the inner sleeve has a closed ring and a magnetically permeable ring along its own axial direction;

[0013] The closed ring is a complete ring, and the magnetically permeable ring includes several arc segments. The several arc segments are evenly arranged around the center line of the iron core, and there are magnetically permeable openings between adjacent arc segments.

[0014] Preferably, the closed rings and the magnetically permeable rings are arranged alternately along the axial direction of the iron core, and the number of closed rings is equal to the number of magnetically permeable rings.

[0015] Preferably, the outer periphery of the closed ring has a plurality of snap-fit ​​modules, each of the plurality of arc segments has a snap-fit ​​module, and the plurality of snap-fit ​​modules arranged along the axial direction of the inner sleeve form a second snap-fit ​​part.

[0016] Preferably, the second snap-fit ​​portion is a slot, the arc segment has an arc-shaped main body and a set of sidewall assemblies, the closed ring has an annular main body and several sets of sidewall assemblies, and a set of the sidewall assemblies includes two sidewall portions, the sidewall portions having an arrow-shaped structure;

[0017] In the arc segment, the sidewall assembly is located on the outside of the arc-shaped body, and the two sidewall portions of the sidewall assembly are arranged along the extension direction of the arc-shaped body;

[0018] In the closed ring, on the outer side of the annular body, several sets of the sidewall assemblies are arranged around the center line of the closed ring, and the two sidewall portions of the sidewall assemblies are arranged along the extension direction of the annular body.

[0019] The tips of two sidewall portions in a set of sidewall assemblies are arranged to be far apart, and the space between the two sidewall portions in a set of sidewall assemblies is the snap-fit ​​module.

[0020] Preferably, the insulating frame has a positioning part and a supporting part;

[0021] The positioning part is an arc-shaped plate, the outer side of the positioning part is attached to the inner surface of the outer sleeve, the support part is located on the inner side of the positioning part, and the insulating frame has a mounting through hole, the mounting through hole passes through the support part and the positioning part, and the winding teeth are inserted into the mounting through hole;

[0022] Furthermore, the central angle of the arc-shaped plate is equal to one-Nth of 360 degrees, where N is equal to the number of winding teeth.

[0023] Preferably, the winding teeth are rectangular blocks, the support is a rectangular frame, the winding is a flat wire winding, and each layer of the winding is wound along a rectangular path from the inside to the outside.

[0024] Preferably, the insulating frame includes two frame segments, which are arranged along the length of the iron core and are spliced ​​close to the first end.

[0025] Each of the two spacer segments has a limiting portion at its second, far apart ends, and the two limiting portions abut against both ends of the iron core.

[0026] An electric motor comprising the high slot fill factor stator described in any of the preceding claims.

[0027] In this application, the iron core consists of three parts from the inside out. The innermost part is the inner sleeve, and the outermost part is the outer sleeve. The center line of the inner sleeve coincides with the center line of the outer sleeve. The winding teeth are located in the annular cavity between the inner sleeve and the outer sleeve and connect the inner sleeve and the outer sleeve. The number of winding teeth is at least two. Several winding teeth are evenly and spaced around the center line of the iron core. The space between adjacent winding teeth is the winding groove, which is used to accommodate part of the structure of the winding wound on the outside of the winding teeth. To avoid short circuits, an insulating skeleton is sandwiched between the winding and the iron core.

[0028] The beneficial effect is that the outer sleeve and the inner sleeve are detachably connected by the winding teeth, which allows the insulating skeleton with the winding to be sleeved on the outside of the winding teeth first, or the insulating skeleton to be sleeved on the outside of the winding teeth first and then the winding to form the winding. That is, the winding of the winding is completed first, and finally the inner sleeve is connected to the free end of the winding teeth. This effectively avoids the outer sleeve from interfering with the winding process and reduces the difficulty of winding, thereby improving the slot fill factor. Attached Figure Description

[0029] 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 only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a specific embodiment provided in this application;

[0031] Figure 2 A top view of the specific embodiments provided in this application;

[0032] Figure 3 This is a partial structural diagram of a specific embodiment provided in this application;

[0033] Figure 4 This is a schematic diagram of the iron core structure of a specific embodiment provided in this application;

[0034] Figure 5 A schematic diagram of the outer casing and winding teeth in a specific embodiment provided in this application;

[0035] Figure 6This is a schematic diagram of the inner sleeve structure of a specific embodiment provided in this application;

[0036] Figure 7 This is a schematic diagram of the structure of the magnetic ring in the specific embodiments provided in this application;

[0037] Figure 8 This is a schematic diagram of the structure of the closed ring in a specific embodiment provided in this application;

[0038] Figure 9 This is a schematic diagram of the assembly of several sets of insulating frames and windings for specific embodiments provided in this application;

[0039] Figure 10 This is a schematic diagram of the assembly of a single insulating frame and windings for a specific embodiment provided in this application;

[0040] Figure 11 This is a schematic diagram of the structure of the insulating frame provided in the specific embodiments of this application;

[0041] Figure 12 This is a schematic diagram of the structure of the skeleton segment in the insulating skeleton of the specific embodiment provided in this application.

[0042] Figure label:

[0043] 1-Iron core; 11-Outer sleeve; 12-Inner sleeve; 121-Second snap-fit ​​part; 1211-Snap-fit ​​module; 122-Closed ring; 1221-Ring-shaped body; 123-Magnetic ring; 1231-Arc segment; 12311-Arc-shaped body; 1232-Magnetic opening; 124-Side wall assembly; 1241-Side wall part; 13-Winding tooth; 131-First snap-fit ​​part;

[0044] 2-Insulating frame; 201-Positioning part; 202-Supporting part; 21-Frame segment; 211-Limiting part;

[0045] 3-Winding. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The core of this application is to provide a high slot fill factor stator, which has a relatively high slot fill factor. Another core aspect of this application is to provide a motor that includes the aforementioned high slot fill factor stator.

[0048] This application provides a high slot fill factor stator, including an iron core 1, a plurality of insulating frames 2 and a plurality of windings 3; wherein, the iron core 1 includes an outer sleeve 11, an inner sleeve 12 and a plurality of winding teeth 13, the outer sleeve 11 is sleeved outside the inner sleeve 12 and there is an annular cavity between the outer sleeve 11 and the inner sleeve 12, the winding teeth 13 are detachably connected to the outer sleeve 11 and the inner sleeve 12, and the plurality of winding teeth 13 are spaced apart and evenly arranged around the center line of the iron core 1;

[0049] Several windings 3 are wound around the outside of the corresponding insulating frame 2, and several insulating frames 2 are sleeved on the outside of the corresponding winding teeth 13.

[0050] refer to Figure 1 , Figure 2 and Figure 4 As explained, the iron core 1 consists of three parts from the inside out. The innermost part is the inner sleeve 12, and the outermost part is the outer sleeve 11. The center line of the inner sleeve 12 coincides with the center line of the outer sleeve 11. The winding teeth 13 are located in the annular cavity between the inner sleeve 12 and the outer sleeve 11 and connect the inner sleeve 12 and the outer sleeve 11. There are at least two winding teeth 13. Several winding teeth 13 are evenly and spaced around the center line of the iron core 1. The space between adjacent winding teeth 13 is the winding groove, which is used to accommodate part of the structure of the winding 3 wound on the outside of the winding teeth 13. Insulating skeleton 2 is sandwiched between the winding 3 and the iron core 1 to avoid short circuit.

[0051] Furthermore, the outer sleeve 11 and the inner sleeve 12 are detachably connected via the winding teeth 13. This allows the insulating skeleton 2, with the winding 3 wound on it, to be placed on the outside of the winding teeth 13 first, or the insulating skeleton 2 to be placed on the outside of the winding teeth 13 before winding to form the winding 3. In other words, the winding of the winding 3 is completed first, and then the inner sleeve 12 is connected to the free end of the winding teeth 13. This effectively avoids the outer sleeve 11 interfering with the winding process of forming the winding 3 and reduces the difficulty of winding. Compared with related technologies, the slot fill factor of this stator is higher, and the difficulty of winding the winding 3 is reduced. Conversely, when it is necessary to replace or repair the winding 3, the inner sleeve 12 can be removed, and then the winding 3 and the insulating skeleton 2 can be removed in sequence, or the insulating skeleton 2 and the winding 3 can be removed together to facilitate the handling of the winding 3.

[0052] Based on the above embodiment, the inner side of a plurality of winding teeth 13 has a first engaging portion 131, and the outer periphery of the inner sleeve 12 has a plurality of second engaging portions 121.

[0053] One of the first latching part 131 and the second latching part 121 is a latching groove and the other is a latching block, and both the first latching part 131 and the second latching part 121 are equal cross-section structures extending along the axial direction of the iron core 1.

[0054] refer to Figure 4 , Figure 5 and Figure 6 As explained, the outer sleeve 11 is fixedly connected to the winding tooth 13, such as by an integral structure or by welding, and the winding tooth 13 extends towards the center to form a first snap-fit ​​portion 131, while the outer periphery of the inner sleeve 12 forms a second snap-fit ​​portion 121. The winding tooth 13 and the inner sleeve 12 are engaged through the first snap-fit ​​portion 131 and the second snap-fit ​​portion 121.

[0055] In particular, both the first snap-fit ​​part 131 and the second snap-fit ​​part 121 adopt a uniform cross-section structure extending along the axial direction of the iron core 1. Preferably, one of the first snap-fit ​​part 131 and the second snap-fit ​​part 121 is a uniform cross-section through groove, and the other is an axial through tooth. The axial through tooth refers to the two ends being flush with the two ends of the inner sleeve 12 or the winding tooth 13.

[0056] When assembly is required, place the inner sleeve 12 directly above or below the outer sleeve 11, and align the several second snap-fit ​​portions 121 of the inner sleeve 12 with the first snap-fit ​​portions 131 of the corresponding winding teeth 13. Then, apply a thrust along the axial direction of the outer sleeve 11 to the inner sleeve 12, pushing the inner sleeve 12 to move along the axial direction of the outer sleeve 11, so that the inner sleeve 12 is fitted inside the outer sleeve 11, and at this time, the first snap-fit ​​portion 131 and the second snap-fit ​​portion 121 engage.

[0057] Based on the above embodiment, the inner sleeve 12 has a closed ring 122 and a magnetic ring 123 along its own axial direction;

[0058] The closed ring 122 is a complete ring, and the magnetic ring 123 includes several arc segments 1231. The several arc segments 1231 are evenly arranged around the center line of the iron core 1, and there are magnetic openings 1232 between adjacent arc segments 1231.

[0059] refer to Figure 1 As explained, the inner sleeve 12 is composed of two types of ring structures. One type is a closed ring 122 without any breaks, and the other type is a magnetic ring 123 with at least two magnetic openings 1232. The magnetic openings 1232 refer to the breaks between adjacent arc segments 1231 that make up a magnetic ring 123. Different layers of ring structures are bonded together to form a complete inner sleeve 12. This arrangement can both improve magnetic performance and reduce cogging torque.

[0060] Based on the above embodiment, the closed ring 122 and the magnetic ring 123 are arranged alternately along the axial direction of the iron core 1, and the number of closed rings 122 is equal to the number of magnetic rings 123.

[0061] refer to Figure 1 , Figure 4 , Figure 6As can be seen, in some embodiments, the inner sleeve 12 includes a ten-layer ring structure, which, from top to bottom, consists of a closed ring 122, a magnetic ring 123, a closed ring 122, a magnetic ring 123, a closed ring 122, a magnetic ring 123, a closed ring 122, a magnetic ring 123, a closed ring 122, and a magnetic ring 123. The number of closed rings 122 and magnetic rings 123 are both five. With this arrangement, the magnetic openings 1232 of the inner sleeve 12 are more evenly distributed, so as to further optimize the magnetic properties and reduce the cogging torque.

[0062] Of course, the number and arrangement of the closed ring 122 and the magnetic ring 123 are not limited to the above embodiments, as long as the requirements of magnetic properties and cogging torque are met. For example, the number of closed rings 122 is three, the number of magnetic rings 123 is four, and the arrangement along the axial direction of the iron core 1 is as follows: closed ring 122, magnetic ring 123, magnetic ring 123, closed ring 122, magnetic ring 123, magnetic ring 123 and closed ring 122.

[0063] Based on the above embodiment, the outer periphery of the closed ring 122 has a plurality of snap-fit ​​modules 1211, and a plurality of arc segments 1231 each have snap-fit ​​modules 1211. The plurality of snap-fit ​​modules 1211 arranged along the axial direction of the inner sleeve 12 form a second snap-fit ​​part 121.

[0064] refer to Figure 1 As explained, the inner sleeve 12 is composed of several ring structures. Each ring structure is provided with several snap-fit ​​modules 1211 along the circumferential direction. The corresponding snap-fit ​​modules 1211 of different ring structures form the second snap-fit ​​part 121. Specifically, the closed ring 122 of the whole ring is arranged with several snap-fit ​​modules 1211 along the axial direction. Correspondingly, several arc segments 1231 that make up the magnetic ring 123 are provided with one or several snap-fit ​​modules 1211 along their own length direction. After the closed ring 122 and the magnetic ring 123 are arranged according to the target and bonded to form the inner sleeve 12, the snap-fit ​​modules 1211 corresponding to the closed ring 122 and the magnetic ring 123 are arranged along the axial direction to form a uniform cross-section structure extending along the axial direction of the iron core 1 as the second snap-fit ​​part 121.

[0065] Based on the above embodiments, the second snap-fit ​​portion 121 is a slot, the arc segment 1231 has an arc-shaped main body 12311 and a set of side wall components 124, the closed ring 122 has an annular main body 1221 and several sets of side wall components 124, and a set of side wall components 124 includes two side wall portions 1241, the side wall portions 1241 having an arrow-shaped structure.

[0066] In the arc segment 1231, the side wall assembly 124 is located on the outside of the arc-shaped body 12311, and the two side wall portions 1241 of the side wall assembly 124 are arranged along the extension direction of the arc-shaped body 12311.

[0067] In the closed ring 122, outside the annular body 1221, several sets of sidewall assemblies 124 are arranged around the center line of the closed ring 122, and the two sidewall portions 1241 of the sidewall assembly 124 are arranged along the extension direction of the annular body 1221.

[0068] The tips of two sidewall portions 1241 in a set of sidewall assemblies 124 are arranged to be far apart, and the space between the two sidewall portions 1241 in a set of sidewall assemblies 124 is a snap-fit ​​module 1211.

[0069] refer to Figure 6 , Figure 7 and Figure 8 As explained, the second engaging portion 121 of the inner sleeve 12 adopts a slot, which is formed by a number of sets of sidewall components 124 arranged along the axial direction of the inner sleeve 12. That is, a number of paired and opposite sidewall portions 1241 are enclosed to form the slot. Specifically, in the arc segment 1231 that makes up the magnetic ring 123, the arc-shaped main body 12311 adopts an arc-shaped sheet structure, and the sidewall components 124 are connected to the outer peripheral surface of the arc-shaped main body 12311. The two sidewall portions 1241 in the sidewall components 124 are arranged along the length direction of the arc segment 1231. Two adjacent sidewall portions in one sidewall component 124 are arranged in a certain direction. The space left between the sidewall portions 1241 is the snap-fit ​​module 1211 of the arc segment 1231 mentioned above; similarly, in the closed ring 122, the circular body adopts a ring-shaped sheet structure, the sidewall assembly 124 is connected to the outer circumferential surface of the circular body, and several sets of sidewall assemblies 124 are arranged along the circumference of the circular body. The two sidewall portions 1241 in each set of sidewall assemblies 124 are also arranged along the circumference of the circular body. Therefore, the space left between the two sidewall portions 1241 in the same set of sidewall assemblies 124 is the snap-fit ​​module 1211 of the closed ring 122 mentioned above.

[0070] In particular, reference Figure 6 , Figure 7 and Figure 8 As can be seen, the sidewall portion 1241 adopts an arrow-shaped structure, and the tips of the two sidewall portions 1241 in a set of sidewall assemblies 124 are arranged to be far apart. In other words, the sidewall portion 1241 has an arrowhead portion and an arrow shaft portion. The arrowhead portions of the two sidewall portions 1241 in a set of sidewall assemblies 124 are arranged to be far apart, while the arrow shaft portions are arranged to be close together. Correspondingly, the first snap-fit ​​portion 131 has notches on both sides along its own width direction to accommodate the arrow shaft portion of the second snap-fit ​​portion 121. This arrangement is beneficial to improving the connection strength between the inner sleeve 12 and the winding tooth 13.

[0071] Of course, the first snap-fit ​​part 131 and the second snap-fit ​​part 121 are not limited to the types of examples mentioned above. As long as they can meet the connection and strength requirements, they can be used. For example, a dovetail structure or a T-shaped structure can be adopted.

[0072] Based on the above embodiments, the insulating frame 2 has a positioning part 201 and a support part 202;

[0073] The positioning part 201 is an arc-shaped plate. The outer side of the positioning part 201 is attached to the inner surface of the outer sleeve 11. The support part 202 is located inside the positioning part 201. The insulating frame 2 has a mounting through hole, which passes through the support part 202 and the positioning part 201. The winding tooth 13 is inserted into the mounting through hole.

[0074] Furthermore, the central angle of the curved plate is equal to 1 / N of 360 degrees, where N is equal to the number of winding teeth 13.

[0075] refer to Figure 1 , Figure 2 , Figure 3 , Figure 9 , Figure 11 As explained, the base of the insulating frame 2 is the positioning part 201, which is an arc-shaped plate. The inner side of the positioning part 201 is connected to the support part 202, that is, the support part 202 is arranged to protrude towards the inner side of the positioning part 201. The insulating frame 2 has a through hole that passes through the support part 202 and the positioning part 201, so that the insulating frame 2 can be sleeved on the outer side of the winding tooth 13, and the outer side of the positioning part 201 of the insulating frame 2 is attached to the inner circumferential surface of the outer sleeve 11.

[0076] Furthermore, when the number of winding teeth 13 is N, the center angle of the arc plate is equal to 360 divided by N. Therefore, after assembling several insulating frames 2 with the outer jacket 11, as shown... Figure 1 , Figure 2 and Figure 3 As shown, several insulating frames 2 are evenly arranged around the center line of the outer casing 11 and are spliced ​​together in sequence to form a complete ring. This arrangement makes the stator compact and helps to improve rotational stability.

[0077] refer to Figure 3 , Figure 9 , Figure 10 and Figure 11 As can be seen, based on the above embodiment, the support part 202 adopts a rectangular frame; correspondingly, in order to improve the quality of the winding 3, the winding 3 adopts a flat wire winding structure, and the innermost layer of the winding 3 is attached to the outer periphery of the support part 202. Therefore, the innermost layer of the winding 3 can adopt a rectangular ring structure formed by winding flat wire along a rectangular path. Since the outermost layer of the winding 3 is wound with the innermost layer as the reference in two adjacent layers, each layer of the winding 3 can adopt a rectangular ring structure formed by winding flat wire along a rectangular path.

[0078] Based on the above embodiments, the insulating frame 2 includes two frame segments 21, which are arranged along the length of the iron core 1 and are spliced ​​close to the first end.

[0079] The two skeleton segments 21 each have a limiting part 211 at their second ends that are far apart, and the two limiting parts 211 abut against the two ends of the iron core 1.

[0080] refer to Figure 9 , Figure 10 , Figure 11 and Figure 12 As explained, the insulating frame 2 is a structure formed by splicing two frame segments 21 at their near ends, with the ends of the two frame segments 21 bonded together. The far ends of the two frame segments 21 each have a limiting part 211, located outside the positioning part 201. One limiting part 211 abuts against one end of the outer jacket 11, and the other limiting part 211 abuts against the other end of the outer jacket 11. Therefore, when the insulating frame 2 needs to be assembled onto the outer jacket 11, the part located on the upper side can be pushed... The skeleton segment 21 moves from top to bottom until the limiting part 211 of the upper skeleton segment 21 abuts against the upper end of the outer jacket 11, at which point the upper skeleton segment 21 covers the top of the winding teeth 13; similarly, the skeleton segment 21 located on the lower side is pushed from bottom to top until the limiting part 211 of the lower skeleton segment 21 abuts against the lower end of the outer jacket 11, at which point the lower skeleton segment 21 covers the bottom of the winding teeth 13, thereby completing the splicing and fixing of the two skeleton segments 21.

[0081] In addition to the high slot fill rate stator described above, this application also provides a motor that includes the high slot fill rate stator disclosed in the above embodiments. For the structure of other parts of the motor, please refer to the prior art, which will not be repeated here.

[0082] It should be noted that the relational terms such as "first" and "second" mentioned above are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities; the terms "upper surface," "lower surface," "top," and "bottom" and the directional terms "upper," "lower," "left," and "right" mentioned above are defined based on the accompanying drawings in the specification.

[0083] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0084] The above provides a detailed description of the motor and its high-slot full-rate stator provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A high slot fill factor stator characterized by, include: Iron core (1), several insulating frames (2) and several windings (3); The iron core (1) includes an outer sleeve (11), an inner sleeve (12) and a plurality of winding teeth (13). The outer sleeve (11) is fitted over the inner sleeve (12), and there is an annular cavity between the outer sleeve (11) and the inner sleeve (12). The winding teeth (13) are detachably connected to the outer sleeve (11) and the inner sleeve (12), and the plurality of winding teeth (13) are spaced apart and evenly arranged around the center line of the iron core (1). Several windings (3) are wound around the outside of the corresponding insulating frame (2), and several insulating frames (2) are sleeved on the outside of the corresponding winding teeth (13).

2. The high-slot-fill-factor stator of claim 1, wherein, The inner side of several winding teeth (13) has a first snap-fit ​​portion (131), and the outer periphery of the inner sleeve (12) has several second snap-fit ​​portions (121). One of the first latching part (131) and the second latching part (121) is a latching groove and the other is a latching block. Both the first latching part (131) and the second latching part (121) are equal cross-section structures extending along the axial direction of the iron core (1).

3. The high-slot-fill-factor stator of claim 2, wherein, The inner sleeve (12) has a closed ring (122) and a magnetic ring (123) along its own axial direction. The closed ring (122) is a complete ring, and the magnetic ring (123) includes several arc segments (1231). The several arc segments (1231) are evenly arranged around the center line of the iron core (1), and there is a magnetic opening (1232) between adjacent arc segments (1231).

4. The high-slot-fill-factor stator of claim 3, wherein, The closed ring (122) and the magnetic ring (123) are arranged alternately along the axial direction of the iron core (1), and the number of the closed ring (122) is equal to the number of the magnetic ring (123).

5. The high-slot-fill-factor stator of claim 3, wherein, The outer periphery of the closed ring (122) has a plurality of snap-fit ​​modules (1211), and a plurality of the arc segments (1231) each have snap-fit ​​modules (1211). A plurality of snap-fit ​​modules (1211) arranged along the axial direction of the inner sleeve (12) form a second snap-fit ​​part (121).

6. The high-slot-fill-factor stator of claim 5, wherein, The second snap-fit ​​part (121) is a slot, the arc segment (1231) has an arc-shaped body (12311) and a set of sidewall assemblies (124), the closed ring (122) has an annular body (1221) and several sets of sidewall assemblies (124), and a set of sidewall assemblies (124) includes two sidewall portions (1241), and the sidewall portions (1241) have an arrow-shaped structure; In the arc segment (1231), the sidewall assembly (124) is located on the outside of the arc-shaped body (12311), and the two sidewall portions (1241) of the sidewall assembly (124) are arranged along the extension direction of the arc-shaped body (12311); In the closed ring (122), the sidewall assembly (124) is located outside the annular body (1221), and several sets of the sidewall assemblies (124) are arranged around the center line of the closed ring (122), and the two sidewall portions (1241) of the sidewall assembly (124) are arranged along the extension direction of the annular body (1221); The tips of two sidewall portions (1241) in a set of sidewall assemblies (124) are arranged to be far apart, and the space between the two sidewall portions (1241) in a set of sidewall assemblies (124) is the snap-fit ​​module (1211).

7. A high-slot-fill-factor stator according to any one of claims 1-6, characterized in that, The insulating frame (2) has a positioning part (201) and a supporting part (202). The positioning part (201) is an arc-shaped plate. The outer side of the positioning part (201) is attached to the inner surface of the outer sleeve (11). The support part (202) is located inside the positioning part (201). The insulating frame (2) has a mounting through hole. The mounting through hole passes through the support part (202) and the positioning part (201). The winding tooth (13) is inserted into the mounting through hole. The central angle of the arc plate is equal to one-Nth of 360 degrees, where N is equal to the number of the winding teeth (13).

8. The high-slot-fill-factor stator of claim 7, wherein, The winding tooth (13) is a rectangular block, the support part (202) is a rectangular frame, the winding (3) is a flat wire winding (3), and each layer of the winding (3) is wound along a rectangular path from the inside to the outside.

9. The high slot fill factor stator according to claim 7, characterized in that, The insulating frame (2) includes two frame segments (21), which are arranged along the length of the iron core (1) and are spliced ​​close to the first end. The two skeleton segments (21) each have a limiting part (211) at their second ends that are far apart, and the two limiting parts (211) abut against the two ends of the iron core (1).

10. An electric machine characterized by The high slot fill factor stator as described in any one of claims 1-9 above.

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