Stator assembly, motor and vehicle

Abstract

A stator assembly, a motor and a vehicle relate to the technical field of motors. The stator assembly comprises a stator core, a stator winding and a first insulating part; the stator core is provided with a plurality of stator tooth parts which are arranged at intervals along the circumferential direction of the stator core, and the stator tooth parts extend along the axial direction of the stator core; the stator winding is wound on the stator tooth part, the first insulating part comprises a first insulating part and a second insulating part which are connected, and the second insulating part is arranged in a bendable manner relative to the first insulating part; the first insulating part is arranged between the stator windings wound on the adjacent stator tooth parts, and the second insulating part is connected with any adjacent stator tooth part; wherein the width of the first insulating part in the circumferential direction of the stator core is greater than the thickness of the second insulating part. The stator assembly provided by the utility model is beneficial to improving the insulation effect between the stator windings.

Description

Technical Field

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

[0002] High voltage systems and high slot fill factors can provide higher power densities and effectively reduce the size of motors, which has become the mainstream direction of motor development.

[0003] The stator windings wound on each stator tooth portion are of the same phase. When the number of winding turns increases and the slot fill factor increases, the winding size will also increase accordingly; the stator windings wound on different stator tooth portions are relatively close to each other, there is a risk of contact, which may cause insulation breakdown of the stator windings. Summary of the Utility Model

[0004] The present disclosure provides a stator assembly, a motor, and a vehicle, which is beneficial to improving the insulation effect between stator windings.

[0005] According to one aspect of the present disclosure, a stator assembly is provided, including a stator core, a stator winding, and a first insulating member;

[0006] The stator core is provided with a plurality of stator tooth portions spaced apart along the circumferential direction of the stator core, and the stator tooth portions extend along the axial direction of the stator core;

[0007] The stator winding is wound around the stator tooth portion. The first insulating member includes a connected first insulating portion and a second insulating portion, and the second insulating portion is disposed bendably relative to the first insulating portion; the first insulating portion is disposed between the stator windings wound on adjacent stator tooth portions, and the second insulating portion is connected to any adjacent stator tooth portion;

[0008] Wherein, the width of the first insulating portion in the circumferential direction of the stator core is greater than the thickness of the second insulating portion.

[0009] In an exemplary embodiment of the present disclosure, the thickness of the first insulating portion is greater than that of the second insulating portion.

[0010] In an exemplary embodiment of the present disclosure, the first insulating portion has a bent portion bent into a wavy shape, and the axis of the bent portion is along the axial direction of the stator core.

[0011] In an exemplary embodiment of the present disclosure, the ratio of the bending radius D1 of the bent portion to the thickness D2 of the first insulating portion satisfies 1 ≤ D1 / D2 ≤ 10.

[0012] In an exemplary embodiment of the present disclosure, the stator core includes a core body and a second insulating member sleeved outside the core body. The stator tooth portion is at least formed on the second insulating member, and the stator winding is wound on the second insulating member; the second insulating member has a first fixing groove in the circumferential direction of the stator core, and the second insulating portion is inserted into the first fixing groove.

[0013] In an exemplary embodiment of the present disclosure, the first insulating member further includes a third insulating portion connected to the first insulating portion, and the third insulating portion is disposed to be bendable relative to the first insulating portion;

[0014] The first fixing grooves are provided in pairs on the second insulating member and respectively face adjacent second insulating members, and the second insulating portion and the third insulating portion are respectively inserted into circumferentially adjacent first fixing grooves of adjacent second insulating members.

[0015] In an exemplary embodiment of the present disclosure, the first insulating member further includes a third insulating portion connected to the first insulating portion, and the third insulating portion is disposed to be bendable relative to the first insulating portion;

[0016] The second insulating member has second fixing grooves along the circumferential direction of the stator core, and the second fixing grooves and the first fixing grooves are respectively disposed at two ends of the second insulating member close to the radial direction of the stator winding; the third insulating portion is inserted into the second fixing grooves.

[0017] In an exemplary embodiment of the present disclosure, the second fixing grooves are provided in pairs on the second insulating member and respectively face adjacent second insulating members, and the second insulating portion and the third insulating portion are respectively inserted into circumferentially adjacent first fixing grooves and second fixing grooves of adjacent second insulating members.

[0018] In an exemplary embodiment of the present disclosure, the first fixing groove has a first opening at one end of the second insulating member along the axial direction of the stator core, and the first opening faces away from the bus bar of the motor.

[0019] In an exemplary embodiment of the present disclosure, the first fixing groove penetrates through the second insulating member along the axial direction of the stator core.

[0020] In an exemplary embodiment of the present disclosure, the stator core is formed by sequentially splicing a plurality of annularly arranged stator modules end to end along the circumferential direction, and stator tooth portions are respectively formed on the stator modules; the stator module includes a core block and a second insulating member covering the outside of the core block, and the core body includes the core block;

[0021] The second insulating member includes an outer ring skeleton, an inner ring skeleton, a winding portion connected between the outer ring skeleton and the inner ring skeleton, and a core installation groove penetrating through the outer ring skeleton, the inner ring skeleton and the winding portion;

[0022] The core block includes an outer ring core, an inner ring core, and a core connection portion connected between the outer ring core and the inner ring core;

[0023] Along the radial direction of the stator core, the inner side of the inner ring skeleton is attached to the outer side of the inner ring core, the outer side of the outer ring skeleton is attached to the inner side of the outer ring core, and the core connection portion is sleeved in the core installation groove;

[0024] Each stator module is connected end to end in sequence along the circumference through the assembling parts on both sides of the outer ring iron core to form a stator iron core; the winding part, the inner ring framework and the inner ring iron core form stator teeth; the stator winding is wound outside the winding part;

[0025] The first fixing groove is formed in the outer ring framework; and / or, the first fixing groove is formed in the inner ring framework.

[0026] In an exemplary embodiment of the present disclosure, the first fixing groove is formed in the outer ring framework, and the first fixing groove also opens towards the outer ring iron core, and the second insulating part is attached to the inner side of the outer ring iron core; and / or, the first fixing groove is formed in the inner ring framework, and the first fixing groove also opens towards the inner ring iron core, and the second insulating part is attached to the outer side of the inner ring iron core.

[0027] In an exemplary embodiment of the present disclosure, the second insulating part is arranged at the axial end of the stator iron core.

[0028] In an exemplary embodiment of the present disclosure, the first insulating part further includes a third insulating part connected to the first insulating part, and the third insulating part is arranged to be bendable relative to the first insulating part; the first insulating part and the third insulating part respectively overlap the axial ends of the stator teeth adjacent to the first insulating part.

[0029] In an exemplary embodiment of the present disclosure, the second insulating part is arranged at the end of the stator iron core close to the bus bar of the motor.

[0030] According to another aspect of the present disclosure, there is provided a motor including the stator assembly of any one of the foregoing.

[0031] According to still another aspect of the present disclosure, there is provided a vehicle including the motor of any one of the foregoing.

[0032] For the stator assembly of the present disclosure, the first insulating part can insulate the stator windings wound on the adjacent stator teeth. The second insulating part is connected to the adjacent stator teeth, and can firmly fix the first insulating part between the adjacent stator windings to prevent the first insulating part from falling off; the first insulating part can isolate the stator windings wound on the adjacent stator teeth, realize the slot insulation of the stator assembly, and improve the insulation strength between the phase difference windings; the circumferential width of the first insulating part is relatively large, which is beneficial to clamping the first insulating part between the adjacent stator windings, and at the same time is beneficial to the relatively high overall stiffness of the first insulating part, and can be smoothly assembled into the gap between the stator windings.

[0033] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0034] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in accordance with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 Schematic diagram of an exemplary embodiment of the stator assembly of the present disclosure.

[0036] Figure 2 Schematic diagram of an exemplary embodiment of the stator assembly of the present disclosure.

[0037] Figure 3 Schematic diagram of the cooperation of a single stator module with a stator winding and a first insulating member in an exemplary embodiment of the stator assembly of the present disclosure.

[0038] Figure 4 Schematic diagram of the cooperation of a single second insulating member with a first insulating member in an exemplary embodiment of the stator assembly of the present disclosure.

[0039] Figure 5 Schematic diagram of a first fixing groove in an exemplary embodiment of the stator assembly of the present disclosure.

[0040] Figure 6 Schematic diagram of a second fixing groove in an exemplary embodiment of the stator assembly of the present disclosure.

[0041] Figure 7 Schematic diagram of a first insulating member in an exemplary embodiment of the stator assembly of the present disclosure.

[0042] Figure 8 Schematic diagram of the stator assembly and a busbar in an exemplary embodiment of the motor of the present disclosure.

[0043] Figure 9 Schematic diagram of a first insulating member in an exemplary embodiment of the stator assembly of the present disclosure.

[0044] Description of reference numerals:

[0045] 1. Stator core; 101. Stator module; 11. Outer ring core; 111. Assembly part; 12. Inner ring core; 2. Stator winding; 3. First insulating member; 31. First insulating part; 311. Bending part; 32. Second insulating part; 33. Third insulating part;

[0046] 4. Second insulating member; 401. First fixing groove; 402. Second fixing groove; 41. Outer ring skeleton; 42. Inner ring skeleton; 43. Winding part; 44. Core installation groove; 5. Busbar. Detailed implementation manners

[0047] Example implementation manners will now be described more fully with reference to the accompanying drawings. However, the example implementation manners can be implemented in various forms and should not be construed as limited to the implementation manners set forth herein; rather, these implementation manners are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example implementation manners to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0048] Unless otherwise specified or stated, the technical terms or scientific terms used in this disclosure should have the ordinary meanings understood by those of ordinary skill in the art to which this disclosure pertains. The terms "a", "an", "the", "said" and "at least one" are used to indicate the existence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first", "second" are used only as labels and do not limit the quantity or importance or order of their objects.

[0049] Terms such as "connection", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a movably connected connection, an integral connection, a detachable connection, can be directly connected, or can be indirectly connected through an intermediate medium.

[0050] In the present disclosure, when it is stated that "Part A is provided on Part B", Part A can be directly contact-connected to Part B, or Part A can be provided on Part C, and Part C is provided on Part B.

[0051] In addition, in this application, the orientation or positional relationship indicated by "inside / outside", "height", "both sides", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present disclosure. It should be understood that these directional terms are relative concepts, and they can change accordingly with the change of the orientation in which the components are placed in the drawings.

[0052] The present disclosure provides a stator assembly, a motor, and a vehicle. Among them, the stator assembly can be the stator of a generator or a motor, and the motor can be a generator or a motor. The vehicle can be a hybrid vehicle including a generator or a motor, or a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or a vehicle of other power types.

[0053] With the continuous development of the motor industry, the market's demand for the driving ability of motors is gradually increasing, and motors are continuously evolving towards high voltage, high speed, high power density, and lightweight and miniaturization. High-voltage systems and high slot fill factors can provide higher power density and effectively reduce the size of motors, which has become the mainstream direction of motor development. However, when the number of winding turns increases and the slot fill factor increases, the winding size will also become larger accordingly, and contact may occur between the out-of-phase stator windings wound on adjacent stator teeth. At this time, the phase-to-phase voltage is much higher than the inter-turn voltage, which is extremely likely to cause insulation breakdown of the winding.

[0054] In view of the above problems, according to the first aspect of the present disclosure, a stator assembly is provided. The stator assembly includes a stator core 1, a stator winding 2, and a first insulating member 3. Among them, the stator core 1 is provided with a plurality of stator teeth arranged at intervals along the circumferential direction of the stator core 1, and the stator teeth extend along the axial direction of the stator core 1; the stator winding 2 is wound around the stator teeth, and the first insulating member 3 includes a connected first insulating portion 31 and a second insulating portion 32, and the second insulating portion 32 is disposed so as to be bendable relative to the first insulating portion 31; the first insulating portion 31 is disposed between the stator windings 2 wound on adjacent stator teeth, and the second insulating portion 32 is connected to any adjacent stator tooth; wherein, the width of the first insulating portion 31 in the circumferential direction of the stator core 1 is greater than the thickness of the second insulating portion 32.

[0055] The stator assembly of the present disclosure can insulate the stator windings 2 wound on adjacent stator teeth through the first insulating member 3. The second insulating portion 32 is connected to the adjacent stator tooth, which can firmly fix the first insulating member 3 between the adjacent stator windings 2 and prevent the first insulating member 3 from falling off; the first insulating portion 31 can isolate the stator windings 2 wound on adjacent stator teeth, realize slot insulation of the stator assembly, and improve the insulation strength between out-of-phase windings; the width of the first insulating portion 31 in the circumferential direction is relatively large, which is beneficial to clamping the first insulating portion 31 between the adjacent stator windings 2, and is also beneficial to the overall high stiffness of the first insulating portion 31, so that it can be smoothly assembled into the gap between the stator windings 2.

[0056] Specifically, the stator core 1 can be a whole-round core or a split core. The first insulating member 3 can be insulating paper, for example, made of natural fiber, synthetic fiber, or composite material, etc. In some embodiments, the first insulating member 3 can also be subjected to impregnation treatment, for example, formed by impregnating cellulose or synthetic fiber paper with epoxy resin, polyester paint, etc.

[0057] The second insulating portion 32 is connected to any adjacent stator tooth. In some embodiments of the present disclosure, the second insulating portion 32 can be disposed at the axial end of the stator core 1. For example, refer to Figure 9As shown, the second insulating portion 32 can overlap the axial end of the stator tooth portion adjacent to the first insulating member 3. The second insulating portion 32 can be fixed to the axial end of the adjacent stator tooth portion by means such as gluing or hot pressing. Alternatively, the second insulating portion 32 may not be fixed to the axial end of the stator core 1, but only connected by contact.

[0058] Exemplarily, the second insulating portion 32 is provided at the end of the stator core 1 close to the bus bar 5 of the motor. The stator core 1 and the bus bar 5 can limit the second insulating portion 32 axially. Specifically, the end of the stator core 1 close to the bus bar 5 can abut against the second insulating portion 32 to prevent the first insulating member 3 from slipping off in the direction away from the bus bar 5; the end of the bus bar 5 close to the stator core 1 can prevent the first insulating member 3 from slipping off in the direction of the bus bar 5.

[0059] Furthermore, the first insulating member 3 may further include a third insulating portion 33 connected to the first insulating portion 31, and the third insulating portion 33 is disposed so as to be bendable relative to the first insulating portion 31; referring to Figure 9 As shown, the first insulating portion 31 and the third insulating portion 33 can respectively overlap the axial ends of the stator tooth portions adjacent to the first insulating member 3, which is more conducive to fixing the first insulating member 3.

[0060] In some embodiments of the present disclosure, the second insulating portion 32 may also be provided along the circumferential direction of the stator core 1. For example, the stator core 1 includes a core body and a second insulating member 4 sleeved outside the core body. The stator tooth portions are at least formed on the second insulating member 4, and the stator windings are wound around the second insulating member. The second insulating member can insulate the core body and the stator windings 2; the second insulating member 4 has a first fixing groove 401 along the circumferential direction of the stator core 1, and the second insulating portion 32 is inserted into the first fixing groove 401. While the second insulating member 4 insulates the stator core 1 and the stator windings 2, the second insulating portion 32 of the first insulating member 3 is fixed through the first fixing groove 401 on the second insulating member 4, so that the first insulating member 3 can be firmly fixed between the adjacent stator windings 2 to prevent the first insulating member 3 from falling off.

[0061] Referring to the attached Figure 1 、 Figure 2 As shown in the schematic diagram of the stator assembly, in an exemplary embodiment of the present disclosure, the stator core 1 is formed by splicing a plurality of annularly arranged stator modules 101 in sequence end to end along the circumferential direction. The stator tooth portions are formed on the stator modules 101 one by one; the core body includes core blocks, and the stator module 101 includes core blocks and a second insulating member 4 covering the outside of the core blocks, and the stator windings 2 are wound outside the second insulating member 4.

[0062] Specifically, referring to Figure 3 、 Figure 4 As shown, Figure 3A schematic diagram showing a single stator module 101 cooperating with a stator winding 2 and a first insulating member 3 is shown. Figure 4 A schematic diagram showing a single second insulating member 4 cooperating with the first insulating member 3 is shown.

[0063] The second insulating member 4 can be an insulating skeleton structure made of engineering plastics such as polyetheretherketone, polybutylene terephthalate, etc., or thermosetting resins such as epoxy resin, phenolic resin, etc., or inorganic insulating materials, composite materials, special fibers, etc.

[0064] The second insulating member 4 can include an outer ring skeleton 41, an inner ring skeleton 42, a winding portion 43 connected between the outer ring skeleton 41 and the inner ring skeleton 42, and a core mounting groove 44 penetrating through the outer ring skeleton 41, the inner ring skeleton 42, and the winding portion 43. The core segments include an outer ring core 11, an inner ring core 12, and a core connecting portion connected between the outer ring core 11 and the inner ring core 12.

[0065] The core segments are sleeved inside the second insulating member 4. Specifically, referring to Figure 3 、 Figure 4 As shown, along the radial direction of the stator core 1, the inner side of the inner ring skeleton 42 is in contact with the outer side of the inner ring core 12, the outer side of the outer ring skeleton 41 is in contact with the inner side of the outer ring core 11, and the core connecting portion is sleeved inside the core mounting groove 44. Referring to Figure 1 paper Figure 3 As shown, the stator modules 101 are sequentially connected end to end in a circumferential direction through the assembling portions 111 on both sides of the outer ring core 11 to form the stator core 1. The winding portion 43, the inner ring skeleton 42, and the inner ring core 12 form the aforementioned stator tooth portions; the stator winding 2 is wound outside the winding portion 43.

[0066] It should be noted that the "inner side / outer side" described in this disclosure is relative to the radial direction of the stator core 1. The "inner side" refers to the side close to the axis of the stator core 1, and the "outer side" refers to the side far from the axis of the stator core 1 / the side close to the outer edge surface of the stator core 1. Adjacent stator modules 101 are connected through the assembling portions 111 on both sides of the outer ring core 11. Exemplarily, the assembling portion 111 can be assembled through a convex / concave mating structure along the axial direction, a dovetail groove / wedge groove structure, or a hook mating structure, and can be fixed by means such as bolts, riveting, welding interference fit, etc., as long as the stator modules 101 can be sequentially connected end to end to form a ring-shaped stator core 1. This disclosure does not make special regulations on this.

[0067] The first fixing groove 401 is formed in the second insulating member 4. In an exemplary embodiment, the first fixing groove 401 can be formed in the outer ring skeleton 41. Referring to Figures 1 to 5As shown, the opening direction of the first fixing groove 401 is along the circumferential direction of the stator core 1 and faces the adjacent stator module 101. For example, the first fixing groove 401 can open towards the stator module 101 on either side. The first insulating part 31 and the second insulating part 32 of the first insulating member 3 can be in a "7" shape. The second insulating part 32 is inserted into the first fixing groove 401, and the first insulating part 31 is bent relative to the second insulating part 32 and clamped between the corresponding stator windings 2 of two adjacent stator modules 101.

[0068] For example, the first fixing grooves 401 can also be arranged in pairs on the second insulating member 4 and respectively face the stator modules 101 on the adjacent two sides. When the first insulating member 3 is installed between the stator modules 101, the second insulating part 32 can be inserted into the first fixing groove 401 on either side, and the first insulating part 31 is bent relative to the second insulating part 32 and clamped between the corresponding stator windings 2 of two adjacent stator modules 101.

[0069] Exemplarily, referring to Figures 1 to 6 As shown, the first insulating member 3 further includes a third insulating part 33 connected to the first insulating part 31, and the third insulating part 33 is arranged to be bendable relative to the first insulating part 31. Exemplarily, the first fixing grooves 401 are arranged in pairs on the second insulating member 4 and respectively face the stator modules 101 on the adjacent two sides. The second insulating part 32 and the third insulating part 33 are respectively inserted into the circumferentially adjacent first fixing grooves 401 of the adjacent second insulating members 4. In this exemplary embodiment, the first insulating member 3 can be in an overall "Y" shape or "T" shape, and the second insulating part 32 and the third insulating part 33 form a certain angle with the first insulating part 31 respectively, so that the overall stiffness of the first insulating member 3 is greater and it is convenient to insert into the first fixing groove 401.

[0070] In an exemplary embodiment, referring to Figure 4 、 Figure 5 As shown, the first fixing groove 401 also opens towards the outer ring core 11, and the second insulating part 32 is in contact with the inner side of the outer ring core 11, which is beneficial to fixing the first insulating member 3 more firmly through the second insulating member 4.

[0071] Referring to Figure 6 As shown, the first fixing groove 401 can also be formed in the inner ring skeleton 42. The first fixing groove 401 can open towards the stator module 101 on either side on the inner ring skeleton 42. The first insulating part 31 and the second insulating part 32 can be in an "L" shape. The second insulating part 32 is inserted into the first fixing groove 401, and the first insulating part 31 is bent relative to the second insulating part 32 and clamped between the corresponding stator windings 2 of two adjacent stator modules 101.

[0072] Similarly, the first fixing grooves 401 can also be arranged in pairs on the inner ring skeleton 42 and respectively face the stator modules 101 on the adjacent two sides. Specifically, reference can be made to the foregoing description of the paired arrangement of the first fixing grooves 401 on the outer ring skeleton 41, which will not be elaborated here.

[0073] In an exemplary embodiment, the first fixing groove 401 also opens towards the inner ring iron core 12, and the second insulating portion 32 is attached to the outer side of the inner ring iron core 12.

[0074] In another exemplary embodiment, the second insulating member 4 has a first fixing groove 401 and a second fixing groove 402 along the circumferential direction of the stator core 1. The second fixing groove 402 and the first fixing groove 401 are respectively arranged at two ends of the second insulating member 4 close to the radial direction of the stator winding 2. For example, the first fixing groove 401 is arranged on the outer ring skeleton 41, and the second fixing groove 402 is arranged on the inner ring skeleton 42; or, the first fixing groove 401 is arranged on the inner ring skeleton 42, and the second fixing groove 402 is arranged on the outer ring skeleton 41. The second insulating portion 32 can be inserted into the first fixing groove 401, and the third insulating portion 33 can be inserted into the second fixing groove 402; or, the second insulating portion 32 can be inserted into the second fixing groove 402, and the third insulating portion 33 can be inserted into the first fixing groove 401.

[0075] Exemplarily, the second fixing groove 402 and the first fixing groove 401 are arranged on the same side in the circumferential direction of the second insulating member 4, that is, the second fixing groove 402 and the first fixing groove 401 face the same side. When installing the first insulating member 3, the second insulating portion 32 and the third insulating portion 33 of the first insulating member 3 can be respectively inserted into the same second insulating member 4. Also for example, the second fixing groove 402 and the first fixing groove 401 are arranged on different sides in the circumferential direction of the second insulating member 4, that is, the second fixing groove 402 and the first fixing groove 401 respectively open towards two sides in the circumferential direction of the second insulating member 4. When installing the first insulating member 3, the second insulating portion 32 and the third insulating portion 33 of the first insulating member 3 can be respectively inserted into two adjacent second insulating members 4.

[0076] In an exemplary embodiment of the present disclosure, the second fixing grooves 402 can also be arranged in pairs on the second insulating member 4 and respectively face the adjacent second insulating members 4. Specifically, reference can be made to the foregoing description of the paired arrangement of the first fixing grooves 401, which will not be elaborated here.

[0077] In an exemplary embodiment of the present disclosure, the first fixing groove 401 can have a first opening at one end of the second insulating member 4 along the axial direction of the stator core 1, and the first opening faces away from the bus bar 5 of the motor. Refer to Figure 8As shown, when assembling the stator assembly, after each stator module 101 is assembled and spliced to form the stator core 1, the first insulating member 3 can be inserted between the stator modules 101 from the side where the stator winding 2 is not connected to the bus bar 5 of the motor. For example, when opening the first fixing groove 401 in the second insulating member 4, control the groove depth of the first fixing groove 401 in the axial direction to control the axial insertion depth of the first insulating member 3, so that the first insulating member 3 does not axially contact the bus bar 5 after insertion.

[0078] In another exemplary embodiment, the first fixing groove 401 penetrates the second insulating member 4 along the axial direction of the stator core 1, that is, the opposite ends of the first fixing groove 401 along the axial direction of the stator core 1 respectively have a first opening and a second opening. After the first insulating member 3 is inserted, the first insulating member 3 can contact the bus bar 5, fully isolating adjacent stator modules 101, and the processing technology of the second insulating member 4 is simpler.

[0079] In an exemplary embodiment of the present disclosure, refer to Figure 4 , Figure 5 As shown, the first fixing groove 401 is opened in the outer ring skeleton 41; one end of the first insulating portion 31 away from the second insulating portion 32 is clamped between the inner ring skeletons 42 of adjacent second insulating members 4. For the segmented stator core 1, one end of the first insulating portion 31 connected to the second insulating portion 32 is fixed through the first fixing groove 401, and the other end can be clamped by adjacent stator modules 101, making the first insulating member 3 more firmly fixed.

[0080] For another example, the first fixing groove 401 is opened in the inner ring skeleton 42. Refer to Figure 6 As shown, one end of the first insulating portion 31 away from the second insulating portion 32 is clamped between the outer ring skeletons 41 of adjacent second insulating members 4.

[0081] Those skilled in the art can understand that in the description of the exemplary embodiments of the present disclosure, different names, the first fixing groove 401 and the second fixing groove 402, are used for convenience of description. In fact, in different embodiments, the meanings of the first fixing groove 401 and the second fixing groove 402 may be the same. For example, the "first fixing groove 401" in some embodiments may be the same as the "second fixing groove 402" in some other embodiments. Such differences in names will not affect the understanding of the technical solutions of the present disclosure by those skilled in the art.

[0082] In an embodiment of the present disclosure, the width of the first insulating portion 31 in the circumferential direction of the stator core 1 is greater than the thickness of the second insulating portion 32. Specifically, the thickness of the first insulating portion 31 or the second insulating portion 32 in the present disclosure refers to the width of the cross-section of the first insulating portion 31 or the second insulating portion 32. For example, it can be measured by clamping the two large surfaces of the first insulating portion 31 or the second insulating portion 32 with the jaws of a caliper. Since the first insulating portion 31 is located between adjacent stator windings 2, the overall extending direction of the first insulating portion 31 is consistent with the radial direction of the stator core 1. The width of the first insulating portion 31 in the circumferential direction of the stator core 1 in the present disclosure can refer to the dimension of the first insulating portion 31 in the direction perpendicular to the overall extending direction of the first insulating portion 31.

[0083] The fact that the width of the first insulating portion 31 in the circumferential direction of the stator core 1 is greater than the thickness of the second insulating portion 32 is beneficial for the first insulating portion 31 to be clamped between adjacent stator windings 2. At the same time, it is also beneficial for the overall stiffness of the first insulating portion 31 to be relatively high, so that it can be smoothly assembled into the gap between the stator windings 2. At the same time, the thickness of the second insulating portion 32 is relatively lower than the width of the first insulating portion 31 in the circumferential direction, which is beneficial for the second insulating portion 32 to be thinner and lighter, facilitating the second insulating portion 32 to smoothly pass through the first fixing groove 401 or reducing the space occupied by the axial end of the stator core 1.

[0084] Exemplarily, the thickness of the first insulating portion 31 is greater than that of the second insulating portion 32. Refer to Figures 4 to 6 As shown, for example, the first insulating member 3 is made of insulating paper. The second insulating portion 32 can be a single-layer insulating paper, and the first insulating portion 31 can be a double-layer insulating paper. When manufacturing the first insulating member 3, the insulating paper can be folded in half to form the relatively thick first insulating portion 31, making the manufacturing of the first insulating member 3 simple and with lower cost.

[0085] Exemplarily, refer to Figures 4 to 6 As shown, both the second insulating portion 32 and the third insulating portion 33 are single-layer insulating papers, and the first insulating portion 31 can be a double-layer insulating paper.

[0086] In an exemplary embodiment of the present disclosure, refer to Figure 7 As shown, the first insulating portion 31 has a bent portion 311 bent into a wavy shape, and the axis of the bent portion 311 is along the axis direction of the stator core 1. For example, before installing the first insulating member 3 between the stator modules 101, the first insulating portion 31 is pre-bent first, so that part or all of the first insulating portion 31 forms a wavy shape, making the stiffness of the first insulating portion 31 higher. Exemplarily, the ratio of the bending radius D1 of the bent portion 311 to the thickness D2 of the first insulating portion 31 satisfies 1≤D1 / D2≤10. On the one hand, it is beneficial to improve the stiffness of the first insulating portion 31, and on the other hand, it is beneficial to control the width of the bent portion 311 in the circumferential direction, facilitating the first insulating member 3 to be smoothly installed between the stator modules 101.

[0087] According to another aspect of the present disclosure, there is also provided an electric machine, including a stator assembly of any one of the foregoing exemplary embodiments and its possible combinations. In the electric machine of the present disclosure, both the stator core 1 and the stator winding 2 work together to generate and control a magnetic field, so as to achieve the conversion between electrical energy and mechanical energy. For example, when current passes through the stator winding 2, a rotating magnetic field will be generated in the stator core 1. Under the action of the rotating magnetic field, due to the principle of electromagnetic induction, an induced current will be generated in the rotor, and then another magnetic field will be generated. The interaction between the two magnetic fields enables the rotor to rotate following the rotating magnetic field generated by the stator assembly, so as to convert electrical energy into mechanical energy. While the second insulating member 4 insulates the stator core 1 from the stator winding 2 in the stator assembly provided by the present disclosure, the first insulating member 3 insulates the stator winding 2 wound on the adjacent stator teeth, thereby realizing the slot insulation of the stator assembly, improving the insulation strength between the phase-displaced windings, enhancing the safety of the electric machine, and being beneficial to further improving the slot fill factor.

[0088] According to yet another aspect of the present disclosure, there is provided a vehicle, including the electric machine of any one of the foregoing.

[0089] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A stator assembly, characterized in that: It comprises a stator core (1), a stator winding (2) and a first insulating member (3); The stator core (1) is provided with a plurality of stator teeth arranged at intervals along the circumferential direction of the stator core (1), and the stator teeth extend along the axial direction of the stator core (1); The stator winding (2) is wound on the stator teeth, the first insulating member (3) comprises a first insulating portion (31) and a second insulating portion (32) which are connected, the second insulating portion (32) being arranged in a bendable manner relative to the first insulating portion (31); the first insulating portion (31) is arranged between the stator windings (2) wound on adjacent stator teeth, and the second insulating portion (32) is connected to any adjacent stator teeth; The width of the first insulating portion (31) in the circumferential direction of the stator core (1) is greater than the thickness of the second insulating portion (32).

2. The stator assembly according to claim 1, characterized in that: The thickness of the first insulating portion (31) is greater than that of the second insulating portion (32).

3. The stator assembly according to claim 1, characterized in that: The first insulating portion (31) has a curved portion (311) that is curved in a wave shape, and the axis of the curved portion (311) is along the axis direction of the stator core (1).

4. The stator assembly according to claim 3, characterized in that: The ratio of a bending radius D1 of the bending portion (311) to a thickness D2 of the first insulating portion (31) satisfies 1≤D1 / D2≤10.

5. The stator assembly according to any one of claims 1 to 4, characterized in that: The stator core (1) comprises a core body and a second insulating member (4) sleeved outside the core body, the stator teeth are at least formed on the second insulating member (4), and the stator winding (2) is wound on the second insulating member (4); the second insulating member (4) has a first fixing groove (401) along the circumference of the stator core (1), and the second insulating portion (32) is inserted into the first fixing groove (401).

6. The stator assembly according to claim 5, characterized in that The first insulating member (3) further comprises a third insulating portion (33) connected to the first insulating portion (31), the third insulating portion (33) being arranged in a bendable manner relative to the first insulating portion (31); The first fixing grooves (401) are arranged in pairs on the second insulating member (4) and are respectively oriented toward adjacent second insulating members (4); the second insulating portion (32) and the third insulating portion (33) are respectively inserted into circumferentially adjacent first fixing grooves (401) of adjacent second insulating members (4).

7. The stator assembly according to claim 5, characterized in that The first insulating member (3) further comprises a third insulating portion (33) connected to the first insulating portion (31), the third insulating portion (33) being arranged in a bendable manner relative to the first insulating portion (31); The second insulating member (4) has a second fixed groove (402) along the circumference of the stator core (1); the second fixed groove (402) and the first fixed groove (401) are respectively arranged at two ends of the second insulating member (4) close to the stator winding (2) in the radial direction; and the third insulating portion (33) is inserted into the second fixed groove (402).

8. The stator assembly according to claim 7, characterized in that The second fixing grooves (402) are arranged in pairs on the second insulating member (4) and are respectively oriented toward adjacent second insulating members (4); the second insulating portion (32) and the third insulating portion (33) are respectively inserted into the circumferentially adjacent first fixing grooves (401) and second fixing grooves (402) of adjacent second insulating members (4).

9. The stator assembly according to claim 5, characterized in that: The first fixing groove (401) has a first opening at one end of the second insulating member (4) along the axial direction of the stator core (1), and the first opening faces in a direction away from the busbar of the motor.

10. The stator assembly according to claim 9, characterized in that The first fixing groove (401) penetrates the second insulating member (4) along the axial direction of the stator core (1).

11. The stator assembly according to claim 5, characterized in that The stator core (1) is formed by a plurality of annularly arranged stator modules (101) connected end to end in sequence along the circumferential direction, and the stator teeth are formed on the stator modules (101) in a one-to-one correspondence; the stator module (101) comprises an iron core block and the second insulating member (4) coated on the outside of the iron core block, and the iron core body comprises the iron core block; The second insulating member (4) comprises an outer ring frame (41), an inner ring frame (42), a winding portion (43) connected between the outer ring frame (41) and the inner ring frame (42), and an iron core mounting groove (44) penetrating the outer ring frame (41), the inner ring frame (42) and the winding portion (43); The core block comprises an outer ring core (11), an inner ring core (12), and a core connection portion connected between the outer ring core (11) and the inner ring core (12); Along the radial direction of the stator core (1), the inner side of the inner ring skeleton (42) is in contact with the outer side of the inner ring core (12), the outer side of the outer ring skeleton (41) is in contact with the inner side of the outer ring core (11), and the core connection portion is sleeved in the core installation groove (44); The stator modules (101) are connected end to end in sequence along the circumferential direction through the assembly parts (111) on both sides of the outer ring core (11) to form the stator core (1); the winding part (43), the inner ring frame (42) and the inner ring core (12) form the stator tooth part; the stator winding (2) is wound around the outside of the winding part (43); The first fixing groove (401) is provided in the outer ring frame (41); and / or the first fixing groove (401) is provided in the inner ring frame (42).

12. The stator assembly according to claim 11, characterized in that The first fixing groove (401) is opened in the outer ring skeleton (41), the first fixing groove (401) is also open toward the outer ring core (11), and the second insulating portion (32) is in contact with the inner side of the outer ring core (11); and / or the first fixing groove (401) is opened in the inner ring skeleton (42), the first fixing groove (401) is also open toward the inner ring core (12), and the second insulating portion (32) is in contact with the outer side of the inner ring core (12).

13. The stator assembly according to any one of claims 1 to 4, characterized in that: The second insulating portion (32) is provided at an axial end portion of the stator core (1).

14. The stator assembly according to claim 13, characterized in that The first insulating member (3) further comprises a third insulating portion (33) connected to the first insulating portion (31), the third insulating portion (33) being arranged in a bendable manner relative to the first insulating portion (31); the first insulating portion (31) and the third insulating portion (33) are respectively overlapped at the axial end of the stator tooth portion adjacent to the first insulating member (3).

15. The stator assembly according to claim 13, characterized in that The second insulating portion (32) is arranged at an end of the stator core (1) close to the busbar of the motor.

16. A motor, characterized in that: A stator assembly comprising any one of claims 1 to 15.

17. A vehicle, characterized in that: Includes the motor as claimed in claim 16.

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