High phase-to-phase insulation segmented bar-shaped stator winding structure and winding method

Abstract

The structure comprises a first stator iron core and a second stator iron core which are detachably connected in the circumferential direction, the two ends of the first stator iron core and the two ends of the second stator iron core are provided with end portion insulating pieces with the front sections and the rear sections independent from each other respectively, and the two sections of insulating modules are internally provided with insulating units corresponding to the stator iron cores. And a continuous wiring channel is formed through the through wire passing layer. Compared with an existing integral injection molding structure, the problems of large edge rolling stress, scrap iron mixing and the like caused by high stack thickness are effectively avoided; the interphase creepage distance is obviously increased through the whole-course orderly winding and the interphase isolation baffle at the common end; and meanwhile, the layout and the insulation thickness of the terminal seat are optimized in a screw hole area, the compatibility of high-voltage insulation and iron casing assembly is considered, and the structure is suitable for a high-voltage high-power motor of over 690 V.

Description

Technical Field

[0001] This application relates to the field of motor-related technology, specifically to a segmented strip stator winding structure and winding method with high phase-to-phase insulation. Background Technology

[0002] With the increasing demands for motor power density and voltage levels from new energy vehicles, industrial drives, and high-voltage frequency conversion systems, high-voltage (e.g., above 690 V) and high-density (axial length ≥ 250 mm) strip stator motors are becoming increasingly widely used. In these motors, the reliability of phase-to-phase insulation directly affects the safety and lifespan of the entire machine.

[0003] In existing technologies, most mainstream strip stators adopt an integral structure. This involves stacking high-thickness silicon steel sheets into a core in one piece, and then using injection molding to integrally coat the ends of the core with engineering plastics (such as PPS or PA6T) to form end insulation. While this method can achieve basic inter-slot and ground insulation, it faces significant technical bottlenecks in high-thickness applications.

[0004] On the one hand, the large stacking thickness of the iron core and the accumulation of stacking tolerances lead to poor overall dimensional consistency. During the injection molding process, burrs or tiny iron filings on the end face of the iron core are easily mixed into the insulation layer, forming conductive impurities and affecting the withstand voltage test. Moreover, the high stacking thickness of the iron core has high rigidity, and a large external force needs to be applied when the whole core is rolled into a ring after injection molding, resulting in poor roundness and affecting the uniformity of the air gap and electromagnetic performance.

[0005] On the other hand, to improve the interphase insulation level, some existing designs attempt to add wire channels or isolation barriers to the end insulation to guide the orderly arrangement of enameled wires. However, such structures often only cover the front end of the winding, and the rear section of the winding and the common terminal area still lack effective isolation measures. In actual winding, the three-phase leads often cross-wrap at the end, closely follow the current collector, and are directly welded to the same terminal block, resulting in insufficient creepage distance between phases A, B, and C, which cannot meet the stringent requirements of high-voltage motors for interphase insulation. In addition, existing end insulation structures mostly do not consider the assembly compatibility with metal housings, lack structural designs to avoid mounting screws, and are difficult to adapt to compact motor solutions such as those with iron housings, thus limiting their application scope.

[0006] Therefore, high-voltage, high-power motors face a combination of challenges, including high-thickness injection molding processes, insulation treatment caused by winding, and compatibility issues related to housing assembly. Summary of the Invention

[0007] This application proposes a segmented strip stator winding structure and winding method with high phase-to-phase insulation. While avoiding the process risks brought about by high-thickness injection molding, it achieves phase-to-phase isolation of the three-phase winding from the starting end to the common end, and at the same time takes into account the rolling forming accuracy and the adaptability of the housing assembly, providing a reliable and mass-producible insulation solution for high-voltage and high-power motors.

[0008] To achieve the above objectives, the present application adopts the following technical solution: In the first aspect, this application proposes a segmented strip stator winding structure with high phase-to-phase insulation, including a first stator core and a second stator core, wherein the first stator core and the second stator core are detachably connected in the circumferential direction to form a complete stator core. The first end insulating member and the second end insulating member are respectively disposed at both ends of the first stator core and the second stator core, and are correspondingly matched with the stator core; The first end insulating member includes a front section and a rear section, and the second end insulating member includes a front section and a rear section. The first end insulating component front section, the first end insulating component rear section, the second end insulating component front section, and the second end insulating component rear section are all independently formed insulating modules. Each insulating module has an insulating unit that corresponds one-to-one with the stator core, and the insulating units within each insulating module are interconnected. The insulation unit is provided with a wire-passing layer that can pass through each insulation module, forming a wire routing channel that can pass through the end area.

[0009] Thus, addressing the challenge of rolling and forming high-thickness strip stators using traditional integral injection molding processes, this application splits the stator into a first stator core and a second stator core, significantly shortening the length of each segment and greatly improving machinability. Combined with independently molded end insulation modules, segmented winding and pre-forming followed by splicing and rolling not only reduces rolling stress but also ensures the roundness and circumferential alignment accuracy of the final stator ring through precise cooperation between modules, providing a feasible path for manufacturing high-thickness, high-power motors.

[0010] Meanwhile, addressing the issue of insufficient creepage distance due to disordered winding in existing technologies, this solution incorporates insulation units within each end insulation module that correspond one-to-one with the stator core. Furthermore, a through-wire layer ensures continuous routing between adjacent modules, forcing the enameled wires to be arranged in an orderly manner throughout, eliminating crossings and contact, and improving the phase-to-phase insulation reliability of the high-voltage motor. In addition, the independently injection-molded insulation modules avoid the risk of iron filings contaminating the circuit, significantly enhancing withstand voltage performance.

[0011] In some possible implementations, the end of the first stator core or the second stator core is provided with a positioning slot for accommodating the insulating unit, and the side wall of the insulating unit is provided with a guide boss that matches the positioning slot.

[0012] In some possible implementations, the circumferential length of the positioning slot is 3 mm to 8 mm.

[0013] In some possible implementations, the first stator core and the second stator core are detachably connected in the circumferential direction through a tenon-and-mortise connection structure. One connecting end is equipped with a guide tenon that can be deflected at an angle during assembly, and the other connecting section is equipped with a positioning tenon that can be positioned.

[0014] In some possible implementations, the first end insulator and the second end insulator are marked with different colors.

[0015] In some possible implementations, asymmetric matching structures are provided between the front section of the first end insulating member and the rear section of the first end insulating member, and between the front section of the second end insulating member and the rear section of the second end insulating member.

[0016] In some possible implementations, the asymmetric matching structure includes a foolproof connection portion disposed on the mating surfaces of the two. The foolproof connection includes a fan-shaped guide boss and a fan-shaped positioning groove respectively disposed at the ends of the two end insulating parts, as well as a rectangular limiting boss and a rectangular mating groove. Both the fan-shaped guide boss and the rectangular limiting boss extend beyond the center symmetry line of the mating surface.

[0017] In some possible implementations, the A-phase, B-phase, and C-phase windings are each wound from a preset starting position that is not adjacent to each other, and all leads are set in the corresponding insulation unit and run continuously through the wire layer, with each phase winding not connected across slots.

[0018] In some possible implementations, the lead-out ends of the A-phase, B-phase, and C-phase windings are all provided with terminal blocks, which are located at the two side edges of the corresponding insulation unit.

[0019] In some possible implementations, a common terminal is provided at a slot of the insulation unit for collecting the ends of the A-phase, B-phase, and C-phase windings; The B-phase winding is led out from the center of the common terminal, and the A-phase and C-phase windings are led out from the two sides of the common terminal, respectively.

[0020] In some possible implementations, at least one phase-to-phase isolation baffle is provided in the common terminal, which separates the B-phase lead from the A-phase and C-phase leads.

[0021] In some possible implementations, the stator core is provided with screw holes, and the terminal block is disposed on the side of the end insulator with screw holes.

[0022] In some possible implementations, the distance between the outer periphery of the screw hole and the nearest end face of the terminal block is not less than 5 mm.

[0023] In some possible implementations, the insulation thickness of the end insulator with screw holes is less than the insulation thickness of the end insulator without screw holes.

[0024] In some possible implementations, the wire-passing layer of the end insulation member with screw holes has a clearance groove at the corresponding slot.

[0025] In some possible implementations, a protective cover is provided on the outside of the wire-passing layer, into which the end insulation can be inserted for fixation.

[0026] Secondly, this application also proposes a method for winding a segmented strip stator with high phase-to-phase insulation, comprising the following steps: Step S1: Provide a first stator core and a second stator core, wherein the first stator core and the second stator core are detachably connected in the circumferential direction; Step S2: Assemble a first end insulating component and a second end insulating component at both ends of the first stator core and the second stator core, respectively; Step S3: Start winding the enameled wires of phases A, B, and C from the set starting slots respectively. Phase A starts from slot B5 and ends at slot B12, phase B starts from slot B3 and ends at slot B10, and phase C starts from slot B1 and ends at slot B8. During the winding process, each phase winding does not cross adjacent slots. Step S4: After completing the winding, roll the first stator core and the second stator core into a ring and splice them together using a tenon and mortise structure to form a complete high phase-to-phase insulated stator.

[0027] In some possible implementations, the winding process further includes the following steps: Step S31: Connect the leads of phase A, phase B, and phase C to the terminal blocks provided on both sides of the corresponding insulation unit; Step S32: A common terminal is formed at slot B10, wherein the B phase lead is led out from the center of the common terminal, and the A phase and C phase leads are led out from both sides of the common terminal respectively, and the B phase and A / C phases are completely separated in space by the phase isolation baffle. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the segmented strip stator winding structure in the rolled state of this application; Figure 2 This is an exploded schematic diagram of the segmented strip stator winding structure in the rolled-up state of this application; Figure 3 This is a schematic diagram of the unfolded state of the first stator core and the second stator core in this application; Figure 4 This is a schematic diagram of the stator core and end insulation components installation structure in this application; Figure 5 This is a schematic diagram of the connection relationship of the end insulating components in the unfolded state in this application; Figure 6 This is a schematic diagram of the connection relationship of the end insulators in the rolled-up state in this application; Figure 7 This is a schematic diagram of the phase line routing relationship in this application; Figure 8 This is a schematic diagram of the terminal block installation state in this application; Figure 9 This is a partial schematic diagram of the public terminal in this application; Figure 10 This is a partial schematic diagram of the screw hole arrangement in this application; Figure 11 This is a schematic diagram of the protective cover in this application. Detailed Implementation

[0029] The following examples further illustrate the features of this application and other related features in detail, so as to facilitate understanding by those skilled in the art: It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions in the attached diagrams, while the terms “bottom surface,” “top surface,” “inner,” and “outer” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0030] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this case based on the specific circumstances.

[0031] like Figures 1 to 3As shown, the stator in this embodiment is detachably connected circumferentially by a first stator core 110 and a second stator core 120. Each component is approximately half the total length, significantly reducing the rigidity of a single segment and greatly reducing the external force required during subsequent rolling. This effectively avoids the problem of excessive inner circle roundness caused by stress concentration in traditional integral cores. In actual manufacturing, the mating ends of the first stator core 110 and the second stator core 120 are respectively provided with guide tenons 101 and positioning mortises 102, forming a mortise and tenon connection structure. The guide tenons 101 can undergo a slight angular deflection during assembly, facilitating alignment and insertion; while the positioning mortises 102 provide precise circumferential positioning, ensuring that the teeth of the two core segments are strictly aligned after splicing, thereby guaranteeing the electromagnetic symmetry and air gap uniformity of the final stator ring.

[0032] To facilitate installation and ensure stability, the circumferential length D111 of the positioning slot 111 has been optimized in this embodiment. For example... Figure 4 As shown, the circumferential length D111 is set between 3 mm and 8 mm, which significantly improves the production yield and long-term operational stability of the high-voltage motor.

[0033] It should be noted that, for ease of understanding, this embodiment will be illustrated using six stator core slots for each of the first stator core 110 and the second stator core 120. In actual applications, the scope of protection of this application should not be limited by this number.

[0034] At both ends of the first stator core 110 and the second stator core 120, a first end insulating component and a second end insulating component are respectively installed. Specifically, the first end insulating component is further divided into a front section 210 and a rear section 220, and the second end insulating component includes a front section 310 and a rear section 320. These four modules are all independently injection-molded insulating components made of high-temperature resistant engineering plastics (such as PPS or PA6T), which not only avoids dielectric defects caused by iron filings during high-thickness integral injection molding, but also improves mold life and production yield. Each insulating module has an insulating unit 10 that corresponds one-to-one with the stator core slot, and the insulating units 10 between adjacent modules are connected through a wire guide layer 20 to form a continuous enameled wire routing channel from the starting end to the common end, providing a structural basis for subsequent orderly winding.

[0035] It should be specifically noted that, as described above in this embodiment, the six stator core slots of the first stator core 110 and the second stator core 120 are used as an example for explanation. For ease of understanding, the insulating units 10 of the front section 210 of the first end insulating member can be named A1 to A6, and similarly, the rear section 220 of the first end insulating member can be named A7 to A12, the front section 310 of the second end insulating member B1 to B6, and the rear section 320 of the second end insulating member B7 to B12. The A1 to A6 of the front section 210 of the first end insulating member and the B7 to B12 of the rear section 320 of the second end insulating member are correspondingly located in the same stator core slot.

[0036] To ensure correct assembly orientation of each insulation module, the first and second end insulation components are marked with different colors (e.g., white and black). Furthermore, the mating surfaces of the front section 210 and rear section 220 of the first end insulation component, as well as the front section 310 and rear section 320 of the second end insulation component, are each provided with a foolproof connection portion 203. Figure 5 and Figure 6 As shown, inside the independent end insulating member, two adjacent insulating units 10 are connected by a hinge 202, which is a soft hinge structure formed synchronously with the end insulating member.

[0037] Furthermore, the foolproof connection part 203 includes a fan-shaped guide boss 2031 and a fan-shaped positioning groove 2032, a rectangular limiting boss 2033 and a rectangular mating groove 2034. At this time, both the fan-shaped guide boss 2031 and the rectangular limiting boss 2033 extend beyond the symmetry line of the center face of the mating surface, so that if a reverse splicing attempt is made, the boss will spatially interfere with the edge of the groove, making assembly impossible, thus fundamentally eliminating the risk of incorrect assembly. In this way, combined with the technical feature described above of using different colors to mark the first and second end insulating parts, the four independent end insulating parts can achieve efficient assembly to prevent incorrect assembly during installation.

[0038] In terms of winding technology, such as Figure 7 and Figure 8 As shown, the enameled wires of phases A, B, and C are wound starting from slots B5, B3, and B1, respectively, and terminate sequentially at slots B12, B10, and B8. The entire winding process is strictly confined within its respective insulation unit 10, never crossing adjacent slots, ensuring that the three-phase conductors remain spatially separated at all times. All leads are arranged in an orderly manner along the wire-passing layer 20 and ultimately connected to the terminal blocks 400 located at the edges of the corresponding insulation unit 10 on both sides. This side-mounted layout not only facilitates the operation of automated crimping equipment but also effectively avoids the stacking of multi-phase leads in a single area, reducing the risk of localized temperature rise and electric field concentration.

[0039] Specifically, a common terminal 301 is formed at the B10 slot location to collect the three-phase terminals. For example... Figure 9 As shown, the B-phase lead is directly drawn from the center of the common terminal 301, while the A-phase and C-phase leads are drawn from their respective sides. To achieve absolute phase-to-phase isolation, a phase-to-phase isolation baffle 302 is embedded inside the common terminal 301. This baffle 302 is made of thin-walled insulating material, which is sufficient to completely separate the B-phase from the A / C-phases in physical space, significantly improving the creepage distance and meeting the insulation safety requirements under high-voltage conditions of 690 V and above.

[0040] To address the assembly requirements of compact motor designs such as those with iron housings, this embodiment includes pre-drilled screw holes 103 on the end insulation components of specific slots (see...). Figure 10 To balance electrical safety and mechanical strength, the terminal block 400 is positioned to the side of the screw hole 103, and the distance from the outer periphery of the screw hole 103 to the nearest end face of the terminal block 400 is not less than 5 mm, ensuring sufficient creepage distance. Simultaneously, the insulation thickness D1 of the end insulation component with the screw hole 103 in this area is 0.5 mm thinner than the insulation thickness D2 of other areas without the screw hole 103, to accommodate the screw insertion space. Furthermore, the wire guide layer 20 in this area is provided with a clearance groove 303, which facilitates the clamping of the enameled wire after winding, preventing loosening due to vibration.

[0041] To further protect the wiring layer 20 from external contamination or mechanical damage, a protective cover 500 is installed on its outer side (see...). Figure 11 The protective cover 500 is also made of insulating engineering plastic, with an upper snap 510 and a lower snap 520 at its upper and lower ends, respectively. During assembly, the protective cover 500 is inserted into the corresponding slot of the end insulating component from top to bottom. After the upper snap 510 and the lower snap 520 are elastically deformed, they snap into the limiting step, achieving quick fixation.

[0042] Thus, addressing the challenge of rolling and forming high-thickness strip stators using traditional integral injection molding processes, this application splits the stator into a first stator core 110 and a second stator core 120, significantly shortening the length of each segment and greatly improving machinability. Combined with independently molded end insulation modules 210, 220, 310, and 320, segmented winding and pre-forming followed by splicing and rolling not only reduces rolling stress but also ensures the roundness and circumferential alignment accuracy of the final stator ring through precise cooperation between modules, providing a feasible path for manufacturing high-thickness, high-power motors.

[0043] Meanwhile, addressing the issue of insufficient creepage distance due to disordered winding in existing technologies, this solution incorporates insulation units 10 within each end insulation module, corresponding one-to-one with the stator core slots. A wire-passing layer 20 ensures continuous routing between adjacent modules, forcing the enameled wires to be arranged in an orderly manner throughout, eliminating crossings and contact, and improving the phase-to-phase insulation reliability of the high-voltage motor. Furthermore, the independently injection-molded insulation modules avoid the risk of iron filings contaminating the wires, significantly improving withstand voltage performance.

[0044] Furthermore, this application also proposes a method for winding a segmented strip stator with high phase-to-phase insulation using the segmented strip stator winding structure with high phase-to-phase insulation as described above, comprising the following steps: Step S1: Provide a first stator core (110) and a second stator core (120), wherein the first stator core (110) and the second stator core (120) are detachably connected in the circumferential direction; Step S2: Assemble a first end insulating component and a second end insulating component at both ends of the first stator core (110) and the second stator core (120); Step S3: Start winding the enameled wires of phases A, B, and C from the set starting slots respectively. Phase A starts from slot B5 and ends at slot B12, phase B starts from slot B3 and ends at slot B10, and phase C starts from slot B1 and ends at slot B8. During the winding process, each phase winding does not cross adjacent slots. Step S4: After the winding is completed, the first stator core (110) and the second stator core (120) are rolled into a ring and spliced ​​together by mortise and tenon structure to form a complete high phase-to-phase insulated stator.

[0045] In some possible implementations, the winding process further includes the following steps: Step S31: Connect the leads of phase A, phase B and phase C to the terminal blocks (400) provided on both sides of the corresponding insulation unit (10). Step S32: A common terminal (301) is formed at slot B10, wherein the B phase lead is led out from the center of the common terminal (301), and the A phase and C phase lead are led out from both sides of the common terminal (301), and the B phase and A / C phase are completely separated in space by the phase isolation baffle (302).

[0046] Through the detailed description of the above specific embodiments, it can be seen that the high phase-to-phase insulation segmented strip stator winding structure and winding method proposed in this application have successfully solved a number of key technical problems existing in the prior art.

[0047] Firstly, there are issues regarding the precision and stress control of the rolling process. In traditional integral injection molding, the large core thickness and accumulated stacking tolerances lead to poor overall dimensional consistency, especially in high-thickness applications. Conductive impurities such as iron filings are easily introduced during injection molding, severely affecting the motor's pressure resistance. Furthermore, the high rigidity of the integral core requires significant external force during rolling, making it difficult to guarantee roundness, which in turn affects air gap uniformity and electromagnetic performance. This invention employs a segmented structural design (such as the first stator core 110 and the second stator core 120), with each segment approximately half the total thickness. This significantly reduces the rigidity of a single segment, greatly reducing the external force required for subsequent rolling and effectively avoiding inner circle roundness deviations caused by stress concentration. Simultaneously, the mortise and tenon connection structure ensures strict alignment of the teeth and grooves of the two core segments after splicing, guaranteeing the electromagnetic symmetry and air gap uniformity of the final stator ring.

[0048] Secondly, regarding the reliability of phase-to-phase insulation. In existing technologies, although some end insulation designs attempt to guide the orderly arrangement of enameled wires by adding cable trays or isolation barriers, these structures often only cover the front end of the winding. The rear section of the winding and the common end area still lack effective isolation measures, resulting in the three-phase leads crossing and tangling at the ends, failing to meet the stringent requirements of high-voltage motors for phase-to-phase insulation. This invention sets up insulation units 10 within each end insulation module, corresponding one-to-one with the stator core slots, and achieves continuous connection of the wiring channels between adjacent modules through a through-layer 20, forcing the enameled wires to be arranged in an orderly manner throughout, eliminating crossing and contact, and significantly improving the phase-to-phase insulation reliability of high-voltage motors. Specifically, a common end 301 is formed at slot B10, and a phase-to-phase isolation barrier 302 is embedded, completely separating phase B from phases A / C in physical space, further enhancing the creepage distance and ensuring insulation safety requirements under high-voltage conditions of 690 V and above.

[0049] Finally, the issue of enhancing housing assembly compatibility is addressed. Existing end insulation structures often fail to consider assembly compatibility with metal housings, lacking structural designs to avoid mounting screws, making them difficult to adapt to compact motor designs such as those with iron housings, thus limiting their application range. This invention addresses this problem by pre-drilling screw holes 102 in the end insulation component at specific slots, and arranging the terminal block 400 on the side of the screw hole 102, ensuring that the distance from the center of the screw hole 102 to the nearest end face of the terminal block 400 is not less than 5 mm, guaranteeing sufficient creepage distance. Furthermore, the insulation thickness of the end insulation component with the screw hole 102 is reduced by 0.5 mm in this area compared to other areas to accommodate screw insertion. Simultaneously, the wire guide layer 20 in this area also features a clearance groove 303, facilitating natural clamping of the enameled wire after winding to prevent vibration-induced loosening. This design not only improves electrical safety but also significantly enhances assembly compatibility with compact motor designs such as those with iron housings, broadening its application range.

[0050] As stated above, this case protects a segmented strip stator winding structure and winding method with high phase-to-phase insulation. All technical solutions that are the same as or similar to this case should be considered to fall within the protection scope of this case.

Claims

1. A high phase-to-phase insulation segmented bar stator winding structure, characterized by, The first stator core (110) and the second stator core (120) are detachably connected along the circumference to form a complete stator core. The first end insulation and the second end insulation are respectively arranged at the two ends of the first stator core (110) and the second stator core (120) and correspondingly matched with the stator core. The first end insulation includes a first end insulation front section (210) and a first end insulation rear section (220), and the second end insulation includes a second end insulation front section (310) and a second end insulation rear section (320). The first end insulation front section (210), the first end insulation rear section (220), the second end insulation front section (310) and the second end insulation rear section (320) are all independently formed insulation modules, each of which is provided with an insulation unit (10) corresponding to the stator core, and the insulation units (10) in each insulation module are connected with each other. The insulation unit (10) is provided with a wire passing layer (20) which can pass through the insulation modules to form a wire passing channel of the lacquered wire which can pass through the end region.

2. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 1, wherein, The end of the first stator core (110) or the second stator core (120) is provided with a positioning clamping groove (111) for accommodating the insulation unit (10), and the side wall of the insulation unit (10) is provided with a guide boss (201) matched with the positioning clamping groove (111).

3. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 2, wherein, The circumferential length (D111) of the positioning clamping groove (111) is 3-8 mm.

4. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 1, wherein, The first stator core (110) and the second stator core (120) are detachably connected along the circumference through a mortise and tenon type connecting structure. One connecting end is provided with a guide tenon (101) which can be angularly deflected during assembly, and the other connecting end is provided with a positioning tenon (102) which can be positioned.

5. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 1, wherein, The first end insulation and the second end insulation are identified by different colors.

6. A high phase-to-phase insulation segmented bar stator winding structure as set forth in claim 1, wherein, The first end insulation front section (210) and the first end insulation rear section (220) and the second end insulation front section (310) and the second end insulation rear section (320) are respectively provided with an asymmetric matching structure.

7. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 6, wherein, The asymmetric matching structure includes a foolproof connecting part (203) arranged on the abutting surfaces of the two end insulations. The foolproof connecting part (203) includes a fan-shaped guide boss (2031) and a fan-shaped positioning groove (2032) arranged at the ends of the two end insulations, and a rectangular limiting boss (2033) and a rectangular matching groove (2034). The fan-shaped guide boss (2031) and the rectangular limiting boss (2033) both extend beyond the central symmetrical line of the abutting surface.

8. A high phase-to-phase insulation segmented bar stator winding structure as set forth in claim 1, wherein, The A-phase, B-phase and C-phase windings are respectively wound from non-adjacent preset starting positions, and all the outgoing wires are arranged in the corresponding insulation units (10) and continuously wired through the wire passing layer (20), and the phase windings are not connected across slots.

9. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 8, wherein, The outgoing ends of the A-phase, B-phase and C-phase windings are provided with terminal seats (400), which are arranged at the two side edges of the corresponding insulation units (10). In some possible embodiments, a common terminal (301) is arranged at a certain slot position of the insulation unit (10) to collect the ends of the A-phase, B-phase and C-phase windings. The B-phase winding is led out from the center position of the common terminal (301), and the A-phase and C-phase windings are led out from the two side positions of the common terminal (301).

10. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 9, wherein, At least one phase separation baffle (302) is arranged in the common terminal (301) to separate the B-phase outgoing line from the A-phase and C-phase outgoing lines.

11. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 9, wherein, The stator core is provided with screw holes (103), and the terminal seats (400) are arranged at the side edges of the end insulation members provided with the screw holes (103).

12. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 10, wherein, The distance between the outer periphery of the screw holes (103) and the nearest end surface of the terminal seats (400) is not less than 5 mm.

13. A high phase-to-phase insulation segmented bar stator winding structure as set forth in claim 10, wherein, The insulation thickness of the end insulation member provided with the screw holes (103) is smaller than that of the end insulation member without the screw holes (103).

14. A high phase-to-phase insulation segmented bar stator winding structure as claimed in claim 13, wherein, The wire passing layer (20) of the end insulation member provided with the screw holes (103) is provided with a recess (303) at the corresponding slot position.

15. A high phase-to-phase insulation segmented bar stator winding structure as set forth in claim 1, wherein, A protective cover (500) is arranged at the outer side of the wire passing layer (20) and can be inserted into the end insulation member for fixation.

16. A segmented strip-shaped stator winding method with high phase-to-phase insulation, comprising the following steps: Step S1: providing a first stator core (110) and a second stator core (120), which are detachably connected in the circumferential direction; Step S2: assembling first and second end insulation members at the two ends of the first and second stator cores (110, 120), respectively; Step S3: winding A-phase, B-phase and C-phase enameled wires from the set starting slot positions, wherein the A-phase starts from the B5 slot and ends at the B12 slot, the B-phase starts from the B3 slot and ends at the B10 slot, and the C-phase starts from the B1 slot and ends at the B8 slot, and each phase winding does not cross the adjacent slot positions during the winding process; Step S4: after the winding is completed, the first and second stator cores (110, 120) are rolled into a ring and spliced through the mortise and tenon structure to form a complete high phase-to-phase insulation stator.

17. The segmented strip-shaped stator winding method with high phase-to-phase insulation according to claim 16, further comprising the following steps after the winding: Step S31: connecting the outgoing ends of the A-phase, B-phase and C-phase to the terminal seats (400) arranged at the two side edges of the corresponding insulation units (10); Step S32: forming a common terminal (301) at the B10 slot, wherein the B-phase outgoing line is led out from the center position of the common terminal (301), and the A-phase and C-phase outgoing lines are led out from the two side positions of the common terminal (301), and the B-phase is completely separated from the A / C phase in space through the phase separation baffle (302).

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