Segmented skewed pole rotor structure
By setting different numbers and angles of rivet holes on the rotor punching plate of the permanent magnet synchronous motor, the overlap of multi-stage oblique poles is achieved, which solves the problems of cogging torque and torque pulsation caused by the stator groove effect, improves the running stability of the motor and reduces costs.
Patent Information
- Application Number
- CN202421862385.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The cogging torque and torque pulsation caused by the stator groove effect of the permanent magnet synchronous motor affects the vibration noise and running stability of the motor.
The segmented oblique pole rotor structure is adopted, and the overlapping of multiple segmented oblique poles is achieved by setting different number and angles of rivet holes on the rotor punching sheet, and the angle of the oblique pole is adjusted to reduce the cogging torque.
Through the segmented oblique structure, the cogging torque can be effectively reduced, the vibration noise of the motor can be reduced and the running stability can be improved, while saving mold costs, reducing processing difficulty and management costs.
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Figure CN222928165U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a segmented skewed pole rotor structure. Background Art
[0002] The permanent magnet synchronous motor uses permanent magnets to provide excitation, making the motor structure relatively simple, reducing the processing and assembly costs, and eliminating the slip rings and brushes that are prone to problems, improving the reliability of the motor operation. Also, because there is no need for excitation current and no excitation loss, the efficiency and power density of the motor are improved. The permanent magnet synchronous motor consists of components such as a stator, a rotor, and an end cover. The stator is basically the same as that of an ordinary induction motor, and a laminated structure is adopted to reduce the iron loss during the operation of the motor. The rotor can be made solid or laminated. The armature winding can adopt a concentrated full-pitch winding, a distributed short-pitch winding, or an unconventional winding.
[0003] Due to the advantages of simple structure, high efficiency, large power density, high torque density, etc., the permanent magnet synchronous motor is widely used in the fields of rail transit, aerospace, wind power generation, and household appliances, and has a broad market prospect. However, at the same time, due to the stator slotting effect, it will cause a large cogging torque and torque ripple, which will affect the vibration and noise of the motor and the running smoothness.
[0004] Therefore, how to solve the deficiencies existing in the above-mentioned prior art has become the subject to be studied and solved in this application. Content of the Utility Model
[0005] In view of this, the purpose of the utility model is to provide a segmented skewed pole rotor structure.
[0006] To achieve the above purpose, the technical solution adopted by the utility model is:
[0007] A segmented skewed pole rotor structure includes a rotor punching sheet with a shaft hole provided in the center. A plurality of rivet holes are provided on the rotor punching sheet, and each of the rivet holes is arranged at an angle along the rotor punching sheet; the rotor punching sheet includes multiple segments of segmented skewed poles, and the skewed pole angle α of n segments of segmented skewed poles is α=(n - 1)360deg / (LCM(Z, 2p)) / (n), where LCM is the least common multiple, Z is the number of stator slots, and 2p is the number of rotor poles; when multiple segments of the segmented skewed poles are stacked according to the preset segmented skewed pole angle α, several of the riveting holes are completely communicated.
[0008] Further, when the rotor punching sheet has two segments of the segmented skewed poles, the total skewed pole angle α = 360deg / (LCM(Z, 2p)) / 2, and the misalignment angle between the first segment of the segmented skewed pole and the second segment of the segmented skewed pole is α.
[0009] Further, the rivet holes include a first rivet hole, a second rivet hole, a third rivet hole, and a fourth rivet hole. The first rivet hole and the third rivet hole are formed on the first segmented inclined pole, and the second rivet hole and the fourth rivet hole are formed on the second segmented inclined pole.
[0010] The spatial angle between the first rivet hole and the second rivet hole is α, and the spatial angle between the third rivet hole and the fourth rivet hole is α. The first rivet hole and the second rivet hole are symmetrically distributed about the magnetic pole center line, and the third rivet hole and the fourth rivet hole are symmetrically distributed about the magnetic pole center line.
[0011] Further, during the assembly of the rotor punching sheet, the first rivet hole on the first segmented inclined pole is riveted to the second rivet hole on the second segmented inclined pole, and the third rivet hole on the first segmented inclined pole is riveted to the fourth rivet hole on the second segmented inclined pole.
[0012] Further, when the rotor punching sheet has three segmented inclined poles, the total inclined pole angle α = 2 * 360deg / (LCM(Z, 2p)) / 3. The misalignment angle between the first segmented inclined pole and the third segmented inclined pole is α, the misalignment angle between the first segmented inclined pole and the second segmented inclined pole is α / 2, and the misalignment angle between the second segmented inclined pole and the third segmented inclined pole is α / 2.
[0013] Further, the rivet holes include a fifth rivet hole, a sixth rivet hole, a seventh rivet hole, an eighth rivet hole, a ninth rivet hole, and a tenth rivet hole. The fifth rivet hole and the eighth rivet hole are formed on the first segmented inclined pole, the sixth rivet hole and the ninth rivet hole are formed on the second segmented inclined pole, and the seventh rivet hole and the tenth rivet hole are formed on the third segmented inclined pole.
[0014] The spatial angles between the fifth rivet hole and the sixth rivet hole, between the sixth rivet hole and the seventh rivet hole, between the eighth rivet hole and the ninth rivet hole, and between the ninth rivet hole and the tenth rivet hole are all α / 2. The fifth rivet hole and the seventh rivet hole are symmetrically distributed about the magnetic pole center line, and the eighth rivet hole and the tenth rivet hole are symmetrically distributed about the magnetic pole center line.
[0015] Further, during the assembly of the rotor punching sheet, the fifth rivet hole, the sixth rivet hole, and the seventh rivet hole are riveted together, and the eighth rivet hole, the ninth rivet hole, and the tenth rivet hole are riveted together.
[0016] Further, when the rotor punching sheet has four segments of the segmented skewed poles, the total skewed pole angle α = 3 * 360deg / (LCM(Z, 2p)) / 4, and the misalignment angle between the first segment of the segmented skewed pole and the fourth segment of the segmented skewed pole is α. The misalignment angles between the first segment of the segmented skewed pole and the second segment of the segmented skewed pole, between the second segment of the segmented skewed pole and the third segment of the segmented skewed pole, and between the third segment of the segmented skewed pole and the fourth segment of the segmented skewed pole are all α / 3.
[0017] Further, the rivet holes include an eleventh rivet hole, a twelfth rivet hole, a thirteenth rivet hole, a fourteenth rivet hole, a fifteenth rivet hole, a sixteenth rivet hole, a seventeenth rivet hole, and an eighteenth rivet hole. The eleventh rivet hole and the fifteenth rivet hole are opened on the first segment of the segmented skewed pole. The twelfth rivet hole and the sixteenth rivet hole are opened on the second segment of the segmented skewed pole. The thirteenth rivet hole and the seventeenth rivet hole are opened on the third segment of the segmented skewed pole. The fourteenth rivet hole and the eighteenth rivet hole are opened on the fourth segment of the segmented skewed pole.
[0018] The space angles between the eleventh rivet hole and the twelfth rivet hole, between the twelfth rivet hole and the thirteenth rivet hole, between the thirteenth rivet hole and the fourteenth rivet hole, between the fifteenth rivet hole and the sixteenth rivet hole, between the sixteenth rivet hole and the seventeenth rivet hole, and between the seventeenth rivet hole and the eighteenth rivet hole are all α / 3. The eleventh rivet hole and the fourteenth rivet hole, the twelfth rivet hole and the thirteenth rivet hole, the fifteenth rivet hole and the eighteenth rivet hole, and the sixteenth rivet hole and the seventeenth rivet hole are symmetrically distributed about the magnetic pole center line.
[0019] Further, when assembling the rotor punching sheet, the eleventh rivet hole, the twelfth rivet hole, the thirteenth rivet hole, and the fourteenth rivet hole are riveted; the fifteenth rivet hole, the sixteenth rivet hole, the seventeenth rivet hole, and the eighteenth rivet hole are riveted.
[0020] Compared with the prior art, the advantages of the present utility model are as follows: By means of the rivet holes with different numbers and different angles on the rotor punching sheet, two rotor segmented skewed pole structures with different segmented numbers are realized, including but not limited to one rotor punching sheet satisfying two-segment skewed poles and three-segment skewed poles, satisfying two-segment skewed poles and four-segment skewed poles. According to the theory of this application, rotors with any two different segmented skewed pole angles can be realized, such as three-segment skewed poles and four-segment skewed poles, three-segment skewed poles and five-segment skewed poles, etc. This application can save the mold cost, reduce the processing difficulty and the control cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0022] Appendix Figure 1 It is a schematic structural diagram of Embodiment 1 of the present application;
[0023] Appendix Figure 2 It is a schematic diagram of the implementation method of the two-stage inclined pole of Embodiment 1 of the present application;
[0024] Appendix Figure 3 It is a schematic assembly diagram of the two-stage inclined pole of Embodiment 1 of the present application;
[0025] Appendix Figure 4 It is a schematic structural diagram of the two-stage inclined pole of Embodiment 1 of the present application;
[0026] Appendix Figure 5 It is a schematic diagram of the implementation method of the three-stage inclined pole of Embodiment 1 of the present application;
[0027] Appendix Figure 6 It is a schematic assembly diagram of the three-stage inclined pole of Embodiment 1 of the present application;
[0028] Appendix Figure 7 It is a schematic structural diagram of the three-stage inclined pole of Embodiment 1 of the present application;
[0029] Appendix Figure 8 It is a schematic structural diagram of Embodiment 2 of the present application;
[0030] Appendix Figure 9 It is a schematic diagram of the implementation method of the two-stage inclined pole of Embodiment 2 of the present application;
[0031] Appendix Figure 10 It is a schematic assembly diagram of the two-stage inclined pole of Embodiment 2 of the present application;
[0032] Appendix Figure 11 It is a schematic structural diagram of the two-stage inclined pole of Embodiment 2 of the present application;
[0033] Appendix Figure 12 It is a schematic diagram of the implementation method of the four-stage inclined pole of Embodiment 2 of the present application;
[0034] Appendix Figure 13 It is a schematic assembly diagram of the four-stage inclined pole of Embodiment 2 of the present application;
[0035] Appendix Figure 14 It is a schematic structural diagram of the four-stage inclined pole of Embodiment 2 of the present application.
[0036] Reference numerals and component descriptions in the drawings:
[0037] 1. rotor punching; 2. rivet hole; 3. first rivet hole; 4. second rivet hole; 5. third rivet hole; 6. fourth rivet hole; 7. fifth rivet hole; 8. sixth rivet hole; 9. seventh rivet hole; 10. eighth rivet hole; 11. ninth rivet hole; 12. tenth rivet hole; 13. nineteenth rivet hole; 14. twentieth rivet hole; 15. twenty-first rivet hole; 16. twenty-second rivet hole; 17. eleventh rivet hole; 18. twelfth rivet hole; 19. thirteenth rivet hole; 20. fourteenth rivet hole; 21. fifteenth rivet hole; 22. sixteenth rivet hole; 23. seventeenth rivet hole; 24. eighteenth rivet hole. DETAILED DESCRIPTION
[0038] The technical solution of the utility model will be clearly and completely described below through specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0039] Although permanent magnet motors have advantages such as high efficiency, high power density, and high torque density, the stator slot effect will cause large cogging torque and torque pulsation, which will affect the vibration, noise, and running stability of the motor. In order to reduce the motor cogging torque, the motor usually adopts the rotor segmented skewed pole method. See Appendix Figures 1 to 14 As shown, a segmented skewed pole rotor structure proposed in the present application includes a rotor punching 1 with a shaft hole in the center, and a plurality of rivet holes 2 are opened on the rotor punching 1. Each rivet hole 2 is set at an angle along the rotor punching 1. When the rotor punching 1 needs to be segmented and skewed, the skew angle α required for n segments of segmented skewed poles can be calculated according to the formula α = (n-1)360deg / (LCM(Z, 2p)) / (n), where LCM is the lowest common multiple, Z is the number of stator slots, and 2p is the number of rotor poles. When multiple segmented skewed poles are overlapped according to a preset segmented skewed pole angle α, several hole positions in the riveting holes 2 are completely connected. The more segmented skewed poles there are, the greater the reduction in the tooth slot torque, and the skewed pole angles of different segmented skewed pole numbers are also different.
[0040] When the number of segmented skew poles in the prior art is 2, usually only one rotor punching is required. The keyway on the punching or the keyway on the shaft is offset by an angle of α / 2, and the front and back sides of the rotors at both ends are fitted together during assembly to complete two-segment skew poles. However, if more than two-segment skew pole angles are to be used, rotor punchings with various different structures are required, which will increase the cost of torque molds and the processing difficulty. By reasonably designing the positions of the rivet holes 2 in this application, one type of rotor punching can meet the usage requirements of two-segment, three-segment, or two-segment and four-segment skew pole rotors, which can save costs more effectively.
[0041] Embodiment 1
[0042] See the appendix Figure 1 As shown, the structure of this embodiment is an integrated rotor punching for two-segment and three-segment segmented skew poles, which can meet the common use of the punching for two-segment and three-segment rotor skew poles. One group is the rivet holes 2 for two-segment skew poles, and using this group of rivet holes 2 can achieve two-segment segmented skew poles. The other group is the rivet holes 2 for three-segment skew poles, and using this group of rivet holes 2 can achieve three-segment segmented skew poles.
[0043] See the appendix Figures 2 to 4 As shown, in this embodiment, when the rotor punching 1 has two-segment segmented skew poles, the total skew pole angle α = 360deg / (LCM(Z, 2p)) / 2, and the misalignment angle between the first-segment segmented skew pole and the second-segment segmented skew pole is α. At this time, the outer rivet holes 2 of the rotor are used to achieve two-segment segmented skew poles. The rivet holes 2 include the first rivet hole 3, the second rivet hole 4, the third rivet hole 5, and the fourth rivet hole 6. The first rivet hole 3 and the third rivet hole 5 are opened on the first-segment segmented skew pole, and the second rivet hole 4 and the fourth rivet hole 6 are opened on the second-segment segmented skew pole. The space angle between the first rivet hole 3 and the second rivet hole 4 is α, and the space angle between the third rivet hole 5 and the fourth rivet hole 6 is α. The first rivet hole 3 and the second rivet hole 4 are symmetrically distributed about the magnetic pole center line, and the third rivet hole 5 and the fourth rivet hole 6 are symmetrically distributed about the magnetic pole center line. When assembling the rotor punching 1, only need to rivet the first rivet hole 3 of the first-segment segmented skew pole and the second rivet hole 4 of the first-segment segmented skew pole together. Rivet the third rivet hole 5 of the first-segment segmented skew pole and the fourth rivet hole 6 of the second-segment segmented skew pole together, then the two-segment skew poles of the rotor can be achieved.
[0044] See the appendix Figures 5 to 7As shown, in this embodiment, when the rotor punching sheet 1 has three segments of segmented skew poles, the total skew pole angle α = 2 * 360deg / (LCM(Z, 2p)) / 3. The misalignment angle between the first segment of segmented skew pole and the third segment of segmented skew pole is α, the misalignment angle between the first segment of segmented skew pole and the second segment of segmented skew pole is α / 2, and the misalignment angle between the second segment of segmented skew pole and the third segment of segmented skew pole is α / 2. At this time, the outer-rotor rivet holes 2 are used to implement the three segments of segmented skew poles. The rivet holes 2 include the fifth rivet hole 7, the sixth rivet hole 8, the seventh rivet hole 9, the eighth rivet hole 10, the ninth rivet hole 11, and the tenth rivet hole 12. The fifth rivet hole 7 and the eighth rivet hole 10 are opened on the first segment of segmented skew pole, the sixth rivet hole 8 and the ninth rivet hole 11 are opened on the second segment of segmented skew pole, and the seventh rivet hole 9 and the tenth rivet hole 12 are opened on the third segment of segmented skew pole. The space angle between the fifth rivet hole 7 and the sixth rivet hole 8 is α / 2, the space angle between the sixth rivet hole 8 and the seventh rivet hole 9 is α / 2, the space angle between the eighth rivet hole 10 and the ninth rivet hole 11 is α / 2, and the space angles between the ninth rivet hole 11 and the tenth rivet hole 12 are all α / 2. The fifth rivet hole 7 and the seventh rivet hole 9 are symmetrically distributed about the magnetic pole center line, and the eighth rivet hole 10 and the tenth rivet hole 12 are symmetrically distributed about the magnetic pole center line. When assembling the rotor punching sheet, only need to rivet the fifth rivet hole 7 of the first segment of segmented skew pole, the sixth rivet hole 8 of the second segment of segmented skew pole, and the seventh rivet hole 9 of the third segment of segmented skew pole together, and rivet the eighth rivet hole 10 of the first segment of segmented skew pole, the ninth rivet hole 11 of the second segment of segmented skew pole, and the tenth rivet hole 12 of the third segment of segmented skew pole together, then the three-segment skew pole of the rotor can be realized.
[0045] Embodiment 2
[0046] See the appendix Figure 8 As shown, the structure of this embodiment is an integrated rotor punching sheet with two segments and four segments of segmented skew poles, which can meet the common use of punching sheets for two-segment and four-segment rotor skew poles. One group is the rivet holes 2 for two-segment skew poles, and using this group of rivet holes 2 can realize two segments of segmented skew poles. The other group is the rivet holes 2 for four-segment skew poles, and using this group of rivet holes 2 can realize four segments of segmented skew poles.
[0047] See the appendix Figures 9 to 11As shown, in this embodiment, when the rotor punching sheet 1 has two segmented skewed poles, the total skewed pole angle α = 360deg / (LCM(Z, 2p)) / 2, and the misalignment angle between the first segmented skewed pole and the second segmented skewed pole is α. At this time, the outer rivet holes 2 of the rotor are used to realize the two segmented skewed poles. The rivet holes 2 include the nineteenth rivet hole 13, the twentieth rivet hole 14, the twenty-first rivet hole 15, and the twenty-second rivet hole 16. The nineteenth rivet hole 13 and the twenty-first rivet hole 15 are opened on the first segmented skewed pole, and the twentieth rivet hole 14 and the twenty-second rivet hole 16 are opened on the second segmented skewed pole. The spatial angle between the nineteenth rivet hole 13 and the twentieth rivet hole 14 is α, and the spatial angle between the twenty-first rivet hole 15 and the twenty-second rivet hole 16 is α. The nineteenth rivet hole 13 and the twentieth rivet hole 14 are symmetrically distributed about the magnetic pole center line, and the twenty-first rivet hole 15 and the twenty-second rivet hole 16 are symmetrically distributed about the magnetic pole center line. When assembling the rotor punching sheet 1, only the nineteenth rivet hole 13 of the first segmented skewed pole and the twentieth rivet hole 14 of the first segmented skewed pole need to be riveted together with a rivet. Rivet the twenty-first rivet hole 15 of the first segmented skewed pole and the twenty-second rivet hole 16 of the second segmented skewed pole together with a rivet, and the two skewed poles of the rotor can be realized.
[0048] See the appendix Figures 12 to 14As shown, in this embodiment, when the rotor punching sheet 1 has four segments of the segmented skew poles, the total skew pole angle α = 3 * 360deg / (LCM(Z, 2p)) / 4. The misalignment angle between the first segment of the segmented skew pole and the fourth segment of the segmented skew pole is α, and the misalignment angles between the first segment of the segmented skew pole and the second segment of the segmented skew pole, between the second segment of the segmented skew pole and the third segment of the segmented skew pole, and between the third segment of the segmented skew pole and the fourth segment of the segmented skew pole are all α / 3. The rivet holes 2 include the eleventh rivet hole 17, the twelfth rivet hole 18, the thirteenth rivet hole 19, the fourteenth rivet hole 20, the fifteenth rivet hole 21, the sixteenth rivet hole 22, the seventeenth rivet hole 23, and the eighteenth rivet hole 24. The eleventh rivet hole 17 and the fifteenth rivet hole 21 are opened on the first segment of the segmented skew pole, the twelfth rivet hole 18 and the sixteenth rivet hole 22 are opened on the second segment of the segmented skew pole, the thirteenth rivet hole 19 and the seventeenth rivet hole 23 are opened on the third segment of the segmented skew pole, and the fourteenth rivet hole 20 and the eighteenth rivet hole 24 are opened on the fourth segment of the segmented skew pole. The space angles between the eleventh rivet hole 17 and the twelfth rivet hole 18, between the twelfth rivet hole 18 and the thirteenth rivet hole 19, between the thirteenth rivet hole 19 and the fourteenth rivet hole 20, between the fifteenth rivet hole 21 and the sixteenth rivet hole 22, between the sixteenth rivet hole 22 and the seventeenth rivet hole 23, and between the seventeenth rivet hole 23 and the eighteenth rivet hole 24 are all α / 3. The eleventh rivet hole 17 and the fourteenth rivet hole 20, the twelfth rivet hole 18 and the thirteenth rivet hole 19, the fifteenth rivet hole 21 and the eighteenth rivet hole 24, and the sixteenth rivet hole 22 and the seventeenth rivet hole 23 are all symmetrically distributed about the magnetic pole center line. During rotor assembly, only need to rivet the eleventh rivet hole 17 of the first segment of the segmented skew pole, the twelfth rivet hole 18 of the second segment of the segmented skew pole, the thirteenth rivet hole 19 of the third segment of the segmented skew pole, and the fourteenth rivet hole 20 of the fourth segment of the segmented skew pole together with rivets. Rivet the fifteenth rivet hole 21 of the first segment of the segmented skew pole, the sixteenth rivet hole 22 of the second segment of the segmented skew pole, the seventeenth rivet hole 23 of the third segment of the segmented skew pole, and the eighteenth rivet hole 24 of the fourth segment of the segmented skew pole together with rivets, then the four-segment skew poles of the rotor can be realized.
[0049] This application realizes the rotor segmented skew pole structures with two different segmented numbers through the different numbers and different angle rivet holes of the rotor punching sheet, including but not limited to one rotor punching sheet satisfying two-segment skew poles and three-segment skew poles, satisfying two-segment skew poles and four-segment skew poles. According to the theory of this application, rotors with any two different segmented skew pole angles can be realized, such as three-segment skew poles and four-segment skew poles, three-segment skew poles and five-segment skew poles, etc.
[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1. A segmented skew-pole rotor structure, characterized in that: It comprises a rotor punching with a rotating shaft hole at the center, and a plurality of rivet holes are opened on the rotor punching, and each of the rivet holes is arranged at an angle along the rotor punching; the rotor punching comprises a plurality of segmented oblique poles, and the oblique pole angle α of the n segmented oblique poles is (n-1)360deg / (LCM(Z, 2p)) / (n), wherein LCM is the least common multiple, Z is the number of stator slots, and 2p is the number of rotor poles; when the plurality of segmented oblique poles are overlapped according to the preset segmented oblique pole angle α, a plurality of hole positions in the rivet holes are completely connected.
2. A segmented skewed pole rotor structure according to claim 1, characterized in that: When the rotor punching sheet has two sections of segmented skew poles, the total skew pole angle α=360deg / (LCM(Z, 2p)) / 2, and the misalignment angle between the first segmented skew pole and the second segmented skew pole is α.
3. A segmented skewed pole rotor structure according to claim 2, characterized in that: The rivet holes include a first rivet hole, a second rivet hole, a third rivet hole and a fourth rivet hole, wherein the first rivet hole and the third rivet hole are provided on the first segmented oblique pole, and the second rivet hole and the fourth rivet hole are provided on the second segmented oblique pole; The spatial angle between the first rivet hole and the second rivet hole is α, and the spatial angle between the third rivet hole and the fourth rivet hole is α; the first rivet hole and the second rivet hole are symmetrically distributed about the center line of the magnetic pole, and the third rivet hole and the fourth rivet hole are symmetrically distributed about the center line of the magnetic pole.
4. A segmented skewed pole rotor structure according to claim 3, characterized in that: When the rotor punching is assembled, the first rivet hole on the first segmented oblique pole and the second rivet hole on the second segmented oblique pole are riveted together, and the third rivet hole on the first segmented oblique pole and the fourth rivet hole on the second segmented oblique pole are riveted together.
5. The segmented skewed pole rotor structure according to claim 1, characterized in that: When the rotor punching has three sections of segmented skew poles, the total skew pole angle α=2*360deg / (LCM(Z, 2p)) / 3, the misalignment angle between the first segmented skew pole and the third segmented skew pole is α, the misalignment angle between the first segmented skew pole and the second segmented skew pole is α / 2, and the misalignment angle between the second segmented skew pole and the third segmented skew pole is α / 2.
6. A segmented skewed pole rotor structure according to claim 5, characterized in that: The rivet holes include a fifth rivet hole, a sixth rivet hole, a seventh rivet hole, an eighth rivet hole, a ninth rivet hole and a tenth rivet hole, wherein the fifth rivet hole and the eighth rivet hole are provided on the first segmented oblique pole, the sixth rivet hole and the ninth rivet hole are provided on the second segmented oblique pole, and the seventh rivet hole and the tenth rivet hole are provided on the third segmented oblique pole; The spatial angles between the fifth rivet hole and the sixth rivet hole, the sixth rivet hole and the seventh rivet hole, the eighth rivet hole and the ninth rivet hole, and the ninth rivet hole and the tenth rivet hole are all α / 2; the fifth rivet hole and the seventh rivet hole are symmetrically distributed about the center line of the magnetic pole, and the eighth rivet hole and the tenth rivet hole are symmetrically distributed about the center line of the magnetic pole.
7. A segmented skewed pole rotor structure according to claim 6, characterized in that: When the rotor punching is assembled, the fifth rivet hole, the sixth rivet hole and the seventh rivet hole are riveted together, and the eighth rivet hole, the ninth rivet hole and the tenth rivet hole are riveted together.
8. The segmented skewed pole rotor structure according to claim 1, characterized in that: When the rotor punching has four segments of segmented skew poles, the total skew pole angle α=3*360deg / (LCM(Z, 2p)) / 4, the misalignment angle between the first segmented skew pole and the fourth segmented skew pole is α, and the misalignment angles between the first segmented skew pole and the second segmented skew pole, the second segmented skew pole and the third segmented skew pole, and the third segmented skew pole and the fourth segmented skew pole are all α / 3.
9. A segmented skewed-pole rotor structure according to claim 8, characterized in that: The rivet holes include an eleventh rivet hole, a twelfth rivet hole, a thirteenth rivet hole, a fourteenth rivet hole, a fifteenth rivet hole, a sixteenth rivet hole, a seventeenth rivet hole and an eighteenth rivet hole, wherein the eleventh rivet hole and the fifteenth rivet hole are arranged on the first segmented oblique pole, the twelfth rivet hole and the sixteenth rivet hole are arranged on the second segmented oblique pole, the thirteenth rivet hole and the seventeenth rivet hole are arranged on the third segmented oblique pole, and the fourteenth rivet hole and the eighteenth rivet hole are arranged on the fourth segmented oblique pole; The spatial angles between the eleventh rivet hole and the twelfth rivet hole, the twelfth rivet hole and the thirteenth rivet hole, the thirteenth rivet hole and the fourteenth rivet hole, the fifteenth rivet hole and the sixteenth rivet hole, the sixteenth rivet hole and the seventeenth rivet hole, and the seventeenth rivet hole and the eighteenth rivet hole are all α / 3; the eleventh rivet hole and the fourteenth rivet hole, the twelfth rivet hole and the thirteenth rivet hole, the fifteenth rivet hole and the eighteenth rivet hole, and the sixteenth rivet hole and the seventeenth rivet hole are all symmetrically distributed about the center line of the magnetic pole.
10. A segmented skewed pole rotor structure according to claim 9, characterized in that: When the rotor punching is assembled, the eleventh rivet hole, the twelfth rivet hole, the thirteenth rivet hole and the fourteenth rivet hole are riveted together; and the fifteenth rivet hole, the sixteenth rivet hole, the seventeenth rivet hole and the eighteenth rivet hole are riveted together.