Insulating sleeve, stator, electric machine and vehicle

Abstract

The embodiment of the present application provides an insulating sleeve, a stator, a motor and a vehicle. The insulating sleeve comprises cavities formed by insulating paper, and the cavities are used for accommodating conductors; wherein the insulating sleeve is provided with at least three cavities arranged in sequence, two cavities located at two ends of the insulating sleeve are used for accommodating conductors of a first phase, at least one cavity is used for accommodating conductors of a second phase, and the number of the conductors of the first phase is different from the number of the conductors of the second phase. The embodiment of the present application separates the conductors of different phases, forms a flexible short-distance form, and suppresses the harmonics of the air gap magnetic field.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, and more particularly to an insulation sleeve, a stator, a motor and a vehicle. BACKGROUND

[0002] With the development of electric vehicles, the performance requirements of driving motors are becoming higher and higher. Flat wire motors have become the mainstream of the development of electric vehicles due to their ultra-high slot fill rate. The winding coils of the flat wire motor adopt an insertion type embedding process, and insulation paper is provided between the stator slots and the conductors to ensure the insulation between adjacent conductors of different phases and between the conductors and the stator core.

[0003] However, the insulation paper in the prior art is symmetrical at both ends, and the harmonic weakening of the air gap magnetic field is poor, especially for motors with q=3 slots per pole per phase, which cannot effectively weaken the 5th and 7th harmonics of the air gap magnetic field.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. SUMMARY

[0005] An object of the present application is to provide a new technical solution for an insulation sleeve, a stator, a motor and a vehicle.

[0006] According to a first aspect of the present application, an insulation sleeve is provided, wherein the insulation sleeve comprises:

[0007] a cavity formed by the insulation paper, the cavity being used to accommodate a conductor;

[0008] wherein the insulation sleeve is provided with at least three cavities arranged in sequence, two cavities at both ends of the insulation sleeve are used to accommodate conductors of a first phase, at least one cavity is used to accommodate conductors of a second phase, and the number of conductors of the first phase is different from the number of conductors of the second phase.

[0009] Optionally, the insulation paper comprises a first insulation paper which encloses a first cavity and a second cavity at the head and tail ends, respectively, and the first cavity and the second cavity accommodate at least one conductor.

[0010] Optionally, the first cavity and the second cavity are formed by the first insulation paper enclosing each other or away from each other.

[0011] Optionally, the first cavity is at the head end of the first insulation paper, and the second cavity is at the tail end of the first insulation paper.

[0012] Optionally, two first insulation papers form a first insulation sleeve.

[0013] wherein the tail ends of the two first insulation papers abut each other.

[0014] Optionally, two of the first insulating papers form a second insulating sleeve.

[0015] Wherein, the first ends of the two first insulating papers abut.

[0016] Optionally, the insulating papers include a second insulating paper which encloses either of the first end and the second end and forms an opening at the other end.

[0017] Optionally, two of the second insulating papers form a third insulating sleeve having a third cavity, a fourth cavity and a fifth cavity arranged in sequence, the third cavity is formed by one of the second insulating papers, the fifth cavity is formed by the other of the second insulating papers, and the fourth cavity is formed by the openings of the two second insulating papers.

[0018] According to a second aspect of the present application, there is provided a stator comprising the insulating sleeve according to any one of the first aspect.

[0019] Optionally, the stator further comprises conductors and stator slots, the insulating sleeve accommodates the conductors, and the stator slots accommodate the insulating sleeve, the stator slots include a first stator slot, a second stator slot and a third stator slot.

[0020] Wherein, the number of conductors of the same phase accommodated by the first stator slot, the second stator slot and the third stator slot increases or decreases in sequence.

[0021] According to a third aspect of the present application, there is provided an electric machine comprising the stator according to any one of the second aspect.

[0022] According to a fourth aspect of the present application, there is provided a vehicle comprising the electric machine according to the third aspect.

[0023] According to an embodiment of the present application, the insulating sleeve has a non-uniform insulating paper structure and at least three cavities to accommodate conductors, which can separate conductors of different phases and form flexible short-pitch forms, effectively suppressing the harmonics of the air-gap magnetic field. In particular, for a motor with q=3 slots per pole per phase, the insulating sleeve according to the embodiment can eliminate more than 80% of the 5th and 7th harmonics of the air-gap magnetic field, achieving the same effect of symmetrical short-pitch in the stator slots of a motor with q=2 slots per pole per phase.

[0024] Other features of the present application, and their advantages, will become apparent in the non-limiting examples of the present application described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

[0026] Figure 1 is a structural schematic diagram of a first insulating paper in one embodiment of the present application.

[0027] Figure 2 is a structural schematic diagram of a second insulating paper in one embodiment of the present application.

[0028] Figure 3 is a structural schematic diagram of a third insulating sleeve in one embodiment of the present application.

[0029] Figure 4 is a structural schematic diagram of a fourth insulating sleeve in one embodiment of the present application.

[0030] Figure 5 is a partial structural schematic diagram of a stator in one embodiment of the present application.

[0031] Figure 6 is a partial structural schematic diagram of a stator in another embodiment of the present application.

[0032] Figure 7 is a structural schematic diagram of a stator in one embodiment of the present application.

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] 1, first insulating paper; 101, first cavity; 102, second cavity; 2, second insulating paper; 201, third cavity; 202, fourth cavity; 203, fifth cavity; 204, sixth cavity; 205, seventh cavity; 206, eighth cavity; 3, first insulating sleeve; 4, second insulating sleeve; 5, third insulating sleeve; 6, fourth insulating sleeve; 7, fifth insulating sleeve; 8, stator; 9, stator slot; 901, first stator slot; 902, second stator slot; 903, third stator slot; 10, tooth portion. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. If it is so determined, the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments do not limit the scope of the present application.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the application or its applications or uses.

[0037] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as falling within the scope of the disclosure.

[0038] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0039] It should be noted that like reference numerals and letters refer to like items throughout the attached drawings, and once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0040] The technical solutions disclosed by the various embodiments of the present application are described in detail below in connection with the drawings.

[0041] According to one embodiment of the present application, an insulating sleeve is provided. Referring to Figures 1 to 7 , the insulating sleeve comprises cavities formed by insulating paper, the cavities being used to accommodate conductors; wherein the insulating sleeve is provided with at least three cavities arranged in sequence, two cavities at the two ends of the insulating sleeve are used to accommodate conductors of a first phase, at least one cavity is used to accommodate conductors of a second phase, the number of the conductors of the first phase is different from the number of the conductors of the second phase.

[0042] Specifically, as shown in Figure 5 and Figure 6 , the two cavities at the two ends of the insulating sleeve according to the embodiments of the present application are used to accommodate conductors of a first phase, and at least one cavity other than the two cavities at the two ends is used to accommodate conductors of a second phase. The number of the conductors accommodated in each cavity is multiple, and the phases of the multiple conductors in the same cavity are the same, so that the insulating sleeve can be arranged according to the actual arrangement of the stator 8.

[0043] Taking the example that six layers of conductors are installed in the insulating sleeve, as shown in Figure 5 , Figure 6 , one or two cavities in the middle of the insulating sleeve are used to accommodate conductors of a second phase, and the number of the conductors of a first phase accommodated in the cavities at the two ends of the insulating sleeve is different from the number of the conductors of a second phase accommodated in the one or two cavities in the middle of the insulating sleeve, so as to arrange the insulating sleeve according to the actual arrangement of the stator 8, effectively simplify the overall structure of the insulating sleeve, improve the slot fill factor of the stator slot 9 and the forming and paper inserting process of the stator 8, and effectively suppress the harmonics of the air gap magnetic field by forming a flexible short distance form.

[0044] In particular, for the motor with q=3 slots per pole per phase, the insulating sleeve can eliminate more than 80% of the 5th and 7th harmonic content of the air gap magnetic field, achieving the same effect of the symmetrical short pitch in the stator slot 9 of the motor with q=2 slots per pole per phase, significantly improving the use effect of the motor with q=3 slots per pole per phase, and improving the use range of the motor.

[0045] In one example, the insulating paper includes a first insulating paper 1, which encloses a first cavity 101 and a second cavity 102 at the two ends respectively, and the first cavity 101 and the second cavity 102 accommodate at least one conductor.

[0046] Specifically, as shown in Figure 1 The first cavity 101 has a small occupied space, and the second cavity 102 has a large occupied space, so that the first cavity 101 can accommodate one conductor, and the second cavity 102 can accommodate two conductors, to form a non-uniform insulating paper structure. The non-uniform insulating paper structure has a flexible short pitch form, which can effectively suppress the harmonic of the air gap magnetic field.

[0047] Of course, the first cavity 101 and the second cavity 102 can also accommodate the same number of conductors to form the insulating sleeve in combination with the non-uniform insulating paper structure, further improving the versatility of the insulating sleeve of the present application.

[0048] In one example, the first cavity 101 and the second cavity 102 are formed by the first insulating paper 1 enclosing each other or away from each other.

[0049] Specifically, the first insulating paper 1 can extend towards the same side at the two ends and enclose the center of the first insulating paper 1, forming a B-type insulating paper. That is, the first insulating paper 1 encloses the B-type insulating paper at the two ends. Among them, the first cavity 101 of the B-type insulating paper has a small occupied space for accommodating one conductor; the second cavity 102 of the B-type insulating paper has a large occupied space for accommodating two conductors. Further, the B-type insulating paper forms a non-uniform B-type insulating paper structure, which can effectively suppress the harmonic of the air gap magnetic field.

[0050] Or, as shown in Figure 1As shown, the first insulating paper 1 can also extend towards the left and right sides respectively at both ends and enclose the center of the first insulating paper 1 to form an S-shaped insulating paper. That is, the first insulating paper 1 encloses the S-shaped insulating paper at both ends. The first cavity 101 of the S-shaped insulating paper occupies a small space and is used to accommodate one conductor; the second cavity 102 of the S-shaped insulating paper occupies a large space and is used to accommodate two conductors. Further, the S-shaped insulating paper forms a non-uniform S-shaped insulating paper structure, which can effectively suppress the harmonics of the air gap magnetic field.

[0051] In addition, the first cavity 101 and the second cavity 102 of the B-shaped insulating paper can also accommodate the same number of conductors to form a uniform B-shaped insulating paper structure. The uniform B-shaped insulating paper structure can be combined with the non-uniform B-shaped insulating paper structure to form the insulating sleeve to adapt to the case where other layers of conductors are installed in the insulating sleeve. The first cavity 101 and the second cavity 102 of the S-shaped insulating paper can also accommodate the same number of conductors to form a uniform S-shaped insulating paper structure. The uniform S-shaped insulating paper structure can be combined with the non-uniform S-shaped insulating paper structure to form the insulating sleeve to adapt to the case where other layers of conductors are installed in the insulating sleeve.

[0052] For example, for the case where the conductors in the slot are five layers, that is, one layer of C-phase conductors, three layers of B-phase conductors, and one layer of C-phase conductors are arranged in the first stator slot 901. The embodiments of the present application can form the insulating sleeve by combining one uniform B-shaped insulating paper with one non-uniform B-shaped insulating paper, or by combining one uniform S-shaped insulating paper with one non-uniform S-shaped insulating paper, so that the insulating sleeve can form a conductor arrangement form of C / B / BB / C, and further so that the conductors of the same phase are located in the same cavity, effectively ensuring the stability and reliability of the conductors in the first stator slot 901, improving the adaptability of the insulating sleeve, and suppressing the harmonics of the air gap magnetic field.

[0053] The uniform B-shaped insulating paper structure, the non-uniform B-shaped insulating paper structure, the uniform S-shaped insulating paper structure, and the non-uniform S-shaped insulating paper structure can also be combined to form the insulating sleeve to accommodate any number of layers of conductors in the stator slot 9. Those skilled in the art can select according to actual needs, which is not specifically limited in the present application.

[0054] Of course, the ends of the insulating paper can also be oppositely enclosed to form a C-shaped insulating paper, which includes one cavity. The C-shaped insulating paper can also be combined with the uniform B-shaped insulating paper structure, the non-uniform B-shaped insulating paper structure, the uniform S-shaped insulating paper structure, and the non-uniform S-shaped insulating paper structure to form the insulating sleeve to adapt to any number of layers of conductors.

[0055] In one example, the first cavity 101 is located at the beginning of the first insulating paper 1, and the second cavity 102 is located at the end of the first insulating paper 1.

[0056] Specifically, such as Figure 1 As shown, in this embodiment, the first cavity 101 is located at the beginning of the first insulating paper 1, and the space occupied by the first cavity 101 is small, which can accommodate one conductor. The second cavity 102 is located at the end of the first insulating paper 1, and the space occupied by the second cavity 102 is large, which can accommodate two conductors. Therefore, when the conductors arranged in the stator slot 9 are five, six, seven, or eight layers, the insulating sleeve formed by the combination of the beginning and end of multiple first insulating papers 1 can better isolate the conductors, effectively ensure the stability and reliability of the conductors in the stator slot 9, and improve the adaptability of the insulating sleeve.

[0057] In one example, two first insulating sheets 1 form a first insulating sleeve 3; wherein the tail ends of the two first insulating sheets 1 abut against each other.

[0058] Specifically, for an 8-pole 72-slot motor (8P72Z) with q=3 slots and six layers of conductors in the slot, the first stator slot 901 in this embodiment can also be provided with a first insulating sleeve 3 formed by the abutting of the tail ends of two non-uniform type B insulating papers. The first insulating sleeve 3 formed by the abutting of the tail ends of the two non-uniform type B insulating papers can be adapted to the one layer of C-phase conductor, four layers of B-phase conductor and one layer of C-phase conductor provided in the first stator slot 901 to form a C / BB / BB / C conductor arrangement, so that conductors of the same phase are located in the same cavity, effectively ensuring the stability and reliability of the conductors in the first stator slot 901 and suppressing the harmonics of the air gap magnetic field.

[0059] In addition, such as Figure 5 As shown, for an 8-pole 72-slot motor (8P72Z) with q=3 slots and six layers of conductors in the slot, the first stator slot 901 of this application is provided with a first insulating sleeve 3 formed by the abutting of the tail ends of two non-uniform S-shaped insulating papers. The first insulating sleeve 3 formed by the abutting of the tail ends of the two non-uniform S-shaped insulating papers can be adapted to the one layer of C-phase conductor, four layers of B-phase conductor and one layer of C-phase conductor provided in the first stator slot 901 to form a C / BB / BB / C conductor arrangement, so that conductors of the same phase are located in the same cavity, effectively ensuring the stability and reliability of the conductors in the first stator slot 901 and suppressing the harmonics of the air gap magnetic field.

[0060] Of course, the first insulation sleeve 3 formed by the tail ends of two uneven B-type insulation papers abutting each other or the first insulation sleeve 3 formed by the tail ends of two uneven S-type insulation papers abutting each other can also be arranged in the third stator slot 903 to adapt to the six layers of C-phase conductors arranged in the third stator slot 903, form a conductor arrangement form of C / C / C / C, effectively ensure the stability and reliability of the conductors in the third stator slot 903, improve the adaptability of the insulation sleeve, and suppress the harmonics of the air gap magnetic field.

[0061] In one example, two first insulation papers 1 form a second insulation sleeve 4; wherein the head ends of the two first insulation papers 1 abut each other.

[0062] Specifically, for the case of six layers of in-slot conductors of an 8-pole 72-slot motor (8P72Z) q=3 slots, the second stator slot 902 is arranged with a second insulation sleeve 4 formed by the head ends of two uneven B-type insulation papers abutting each other, and the second insulation sleeve 4 formed by the head ends of the two uneven B-type insulation papers abutting each other can adapt to the two layers of C-phase conductors, the two layers of B-phase conductors, and the two layers of C-phase conductors arranged in the second stator slot 902 to form a conductor arrangement form of CC / B / B / CC, so that conductors of the same phase are located in the same cavity, effectively ensuring the stability and reliability of the conductors in the second stator slot 902, and suppressing the harmonics of the air gap magnetic field.

[0063] In addition, as shown in Figure 5 for the case of six layers of in-slot conductors of an 8-pole 72-slot motor (8P72Z) q=3 slots, the second stator slot 902 is arranged with a second insulation sleeve 4 formed by the head ends of two uneven S-type insulation papers abutting each other, and the second insulation sleeve 4 formed by the head ends of the two uneven S-type insulation papers abutting each other can adapt to the two layers of C-phase conductors, the two layers of B-phase conductors, and the two layers of C-phase conductors arranged in the second stator slot 902 to form a conductor arrangement form of CC / B / B / CC, so that conductors of the same phase are located in the same cavity, effectively ensuring the stability and reliability of the conductors in the second stator slot 902, and suppressing the harmonics of the air gap magnetic field.

[0064] Of course, the first insulation sleeve 3 formed by the tail ends of two uneven B-type insulation papers abutting each other or the first insulation sleeve 3 formed by the tail ends of two uneven S-type insulation papers abutting each other can also be arranged in the third stator slot 903 to adapt to the six layers of C-phase conductors arranged in the third stator slot 903, form a conductor arrangement form of C / C / C / C, effectively ensure the stability and reliability of the conductors in the third stator slot 903, improve the adaptability of the insulation sleeve, and suppress the harmonics of the air gap magnetic field.

[0065] In one example, the insulating paper includes a second insulating paper 2 which is enclosed at either end and has an opening at the other end.

[0066] Specifically, as shown in Figures 2 to 4 The insulating paper of the embodiment of the present application extends towards any side at either end and is enclosed towards the center of the insulating paper to form a q-type insulating paper. The insulating sleeve can be composed of two q-type insulating papers to form a uniform q-type insulating paper structure and a non-uniform q-type insulating paper structure. The combination of the uniform q-type insulating paper structure and the non-uniform q-type insulating paper structure can adapt to the case of any number of layers of conductors, and the non-uniform q-type insulating paper structure can effectively suppress the harmonics of the air gap magnetic field due to its flexible short-distance form.

[0067] In one example, two second insulating papers 2 form a third insulating sleeve 5 having a third cavity 201, a fourth cavity 202 and a fifth cavity 203 arranged in sequence. The third cavity 201 is formed by one of the second insulating papers 2, the fifth cavity 203 is formed by the other of the second insulating papers 2, and the fourth cavity 202 is formed by the openings of the two second insulating papers 2.

[0068] Specifically, as shown in Figure 3 and Figure 6 For the case of 6 layers of in-slot conductors of an 8-pole 72-slot motor (8P72Z) q=3 slots, the first stator slot 901 of the embodiment of the present application is provided with a third insulating sleeve 5. The third insulating sleeve 5 can adapt to one layer of C-phase conductors, four layers of B-phase conductors and one layer of C-phase conductors arranged in the first stator slot 901 to form a C / BBBB / C conductor arrangement, so that conductors of the same phase are located in the same cavity, effectively ensuring the stability and reliability of the conductors in the first stator slot 901 and suppressing the harmonics of the air gap magnetic field.

[0069] Of course, the third insulating sleeve 5 can also be arranged in the third stator slot 903 to adapt to six layers of C-phase conductors arranged in the third stator slot 903 to form a C / CCCC / C conductor arrangement, effectively ensuring the stability and reliability of the conductors in the third stator slot 903, improving the adaptability of the insulating sleeve, and suppressing the harmonics of the air gap magnetic field.

[0070] In one example, two of the second insulating papers 2 form a fourth insulating sleeve 6 having a sixth cavity 204, a seventh cavity 205 and an eighth cavity 206 arranged in sequence, the sixth cavity 204 is formed by one of the second insulating papers 2, the eighth cavity 206 is formed by the other of the second insulating papers 2, and the seventh cavity 205 is formed by the openings of the two second insulating papers 2; wherein the sixth cavity 204, the seventh cavity 205 and the eighth cavity 206 accommodate the same number of conductors.

[0071] Specifically, as shown in Figure 4 and Figure 6 for the case of 6 layers of in-slot conductors for an 8-pole 72-slot motor (8P72Z) q=3 slot, the second stator slot 902 is provided with a fourth insulating sleeve 6, which can accommodate two layers of C-phase conductors, two layers of B-phase conductors and two layers of C-phase conductors arranged in the second stator slot 902, two second q-type insulating papers can be selected to form an insulating sleeve to form a CC / BB / CC conductor arrangement, so that conductors of the same phase are located in the same cavity, effectively ensuring the stability and reliability of the conductors in the second stator slot 902, and suppressing the harmonics of the air gap magnetic field.

[0072] Of course, the fourth insulating sleeve 6 can also be provided in the third stator slot 903 to accommodate six layers of C-phase conductors arranged in the third stator slot 903, forming a CC / CC / CC conductor arrangement, effectively ensuring the stability and reliability of the conductors in the third stator slot 903, improving the adaptability of the insulating sleeve, and suppressing the harmonics of the air gap magnetic field.

[0073] In one example, the insulating paper includes a third insulating paper formed by the two ends of the insulating paper facing each other and enclosing the center of the insulating paper.

[0074] Specifically, the two ends of the insulating paper of the present application extend towards the same side and enclose the center of the insulating paper, forming an O-shaped insulating paper. That is, the two ends of the insulating paper face each other to form an O-shaped insulating paper. The O-shaped insulating paper is a closed insulating paper, and the two ends of the O-shaped insulating paper have a coincident part, which can be located at any side of the stator slot 9.

[0075] As shown in Figure 5 and Figure 6As shown, for the 8-pole 72-slot motor (8P72Z) q=3 slot, the conductor in the slot is 6 layers, the third stator slot 903 of the embodiment of the application is provided with a fifth insulation sleeve 7, which can adapt to the six layers of C-phase conductor layers arranged in the third stator slot 903 to form a conductor arrangement form of CCCCCC, so that the six C-phase conductors are located in one cavity, further improving the production efficiency of the motor and saving the production cost of the motor.

[0076] Of course, in actual application, the above-mentioned B type, S type, C type, q type and O type can also be combined for use according to the actual needs and process requirements of the motor, for example, five layers of CBBBC, BCCCB, CCCCCC, seven layers of CCBBBBC, BBCCCCB, CCCCCCC, eight layers of CCBBBBBC, BBCCCCCB, CCCCCCCC, etc. Those skilled in the art can select according to actual needs, which is not specifically limited herein.

[0077] According to another embodiment of the application, a stator 8 is provided, which comprises the insulation sleeve of the embodiment of the application.

[0078] Specifically, as shown, Figures 5 to 7 The stator 8 of the embodiment of the application is provided with the insulation sleeve, which effectively improves the forming and paper insertion process of the stator 8, and realizes effective suppression of the harmonic of the air gap magnetic field through the flexible short distance form of the insulation sleeve.

[0079] In particular, for a motor with q=3 slots per pole per phase, the insulation sleeve of the embodiment of the application can eliminate more than 80% of the 5th and 7th harmonic content of the air gap magnetic field, achieving the same effect of symmetrical short distance in the stator slot 9 of a motor with q=2 slots per pole per phase, significantly improving the use effect of the motor with q=3 slots per pole per phase, and improving the use range of the motor.

[0080] In one example, the stator 8 further comprises a conductor and a stator slot 9, the insulation sleeve contains the conductor, the stator slot 9 contains the insulation sleeve, and the stator slot 9 comprises a first stator slot 901, a second stator slot 902 and a third stator slot 903; wherein the number of conductors of the same phase contained in the first stator slot 901, the second stator slot 902 and the third stator slot 903 increases or decreases in turn.

[0081] Specifically, as shown, Figures 5 to 7 The stator 8 of the embodiment of the application is provided with a stator slot 9 and a tooth portion 10, the stator slot 9 and the tooth portion 10 are arranged alternately, and the stator slot 9 is used to contain the insulation sleeve. Therefore, the stator 8 can realize effective suppression of the harmonic of the air gap magnetic field through the arrangement of the insulation sleeve.

[0082] For example, for a motor with q = 3 slots per pole per phase, more than 80% of the 5th and 7th harmonic content of the air gap field can be eliminated by the stator 8, achieving the same effect as the symmetrical short pitch in the stator slot 9 of a motor with q = 2 slots per pole per phase.

[0083] In addition, the stator 8 described in the embodiments of the application also increases or decreases the number of conductors of the same phase contained in the first stator slot 901, the second stator slot 902 and the third stator slot 903 in turn, significantly improving the performance of the stator 8.

[0084] In one example, the insulating paper is assembled with the stator slot 9 by a paper insertion process.

[0085] Specifically, as shown in Figure 7 The embodiments of the application can form different insulating paper structures by multiple paper insertion machines and insert 72 slots to significantly improve the assembly efficiency of the stator.

[0086] For example Figure 5 As shown, for a q = 3 slot 8-pole 72-slot motor (8P72Z), the conductors in the slot are six layers, and the embodiments of the application use the first insulating sleeve 3 and the second insulating sleeve 4 to insert the 72 slots.

[0087] When inserting the first insulating sleeve 3, the stator 8 can be fixed on the positioning mechanism of the first paper insertion machine, and then a dividing rotation mechanism is used to insert one of the first insulating sleeves 3 in each slot until 36 slots are inserted. At the same time, the same stator 8 is also fixed on the positioning mechanism of the second paper insertion machine, and a dividing rotation mechanism is used to insert one of the second insulating sleeves 4 in each slot until the remaining 36 slots are inserted.

[0088] In addition, when the embodiments of the application use the third insulating sleeve and the fourth insulating sleeve to insert the 72 slots, the paper insertion process of the insulating paper is the same as the above-mentioned forming method of using the first insulating sleeve 3 and the second insulating sleeve 4 to insert the 72 slots, which will not be repeated here.

[0089] Of course, as shown in Figure 6 When the embodiments of the application use the third insulating sleeve 5, the fourth insulating sleeve 6 and the fifth insulating sleeve 7 to insert the 72 slots, the application can also provide three paper insertion machines to insert the 72 slots in turn.

[0090] Therefore, the embodiment of the application improves the forming and inserting process of the stator 8, improves the assembly efficiency of the stator 8, and further improves the production efficiency of the motor and saves the production cost of the motor by the way of assembling the insulating paper of the same stator by multiple paper inserting machines. In addition, the insulating paper can also have a good inhibitory effect on the 5th and 7th harmonics of the air gap magnetic field, which significantly improves the use performance of the motor.

[0091] It should be noted that the above inserting process is also applicable to the motor with q=3, such as 6-pole 54-slot (6P54Z) and 10-pole 90-slot (10P90Z).

[0092] According to another embodiment of the application, a motor is provided, which comprises the stator 8 of the embodiment of the application.

[0093] According to another embodiment of the application, a vehicle is provided, which comprises the motor of the embodiment of the application.

[0094] The above embodiments mainly describe the differences between the embodiments, and the different optimization features of the embodiments can be combined to form a better embodiment as long as they are not contradictory. In view of the brevity of the text, the above will not be repeated here.

[0095] Although some specific embodiments of the application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of the application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the application. The scope of the application is defined by the appended claims.

Claims

1. An insulating sleeve, characterized in that, The application relates to an insulation sleeve for a stator of an electric motor. The insulation sleeve comprises: a cavity formed by insulation paper, the cavity being used for accommodating conductors; wherein the insulation sleeve is provided with at least three cavities arranged in sequence, two cavities at two ends of the insulation sleeve are used for accommodating conductors of a first phase, and at least one cavity is used for accommodating conductors of a second phase, the number of the conductors of the first phase being different from the number of the conductors of the second phase; the insulation paper comprises second insulation paper (2) which is enclosed at one end and has an opening at the other end; 2. A stator characterized by, two second insulation papers (2) form a third insulation sleeve (5) which has third cavities (201), fourth cavities (202) and fifth cavities (203) arranged in sequence, the third cavities (201) are formed by one of the second insulation papers (2), the fifth cavities (203) are formed by the other of the second insulation papers (2), and the fourth cavities (202) are formed by the openings of the two second insulation papers (2).

3. A stator according to claim 2, wherein The application further relates to an insulation sleeve as claimed in claim 1. The stator (8) further comprises conductors and stator slots (9), the insulation sleeve is used for accommodating the conductors, and the stator slots (9) are used for accommodating the insulation sleeve, the stator slots (9) comprise first stator slots (901), second stator slots (902) and third stator slots (903); 4. An electric machine characterized by wherein the number of the conductors of the same phase accommodated by the first stator slots (901), the second stator slots (902) and the third stator slots (903) increases in sequence or decreases in sequence.

5. A vehicle characterized by comprising: The application further relates to a stator (8) as claimed in any one of claims 2-3. The application further relates to an electric motor as claimed in claim 4.

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