Rotor punching sheet structure for improving reluctance torque of motor

Abstract

The utility model discloses a rotor punching sheet structure for improving reluctance torque of a motor, which comprises a main body and a plurality of magnet mounting structures, the plurality of magnet mounting structures are mounted on the main body, the main body is provided with through grooves matched with the magnet mounting structures, each magnet mounting structure comprises an inner magnetic isolation sheet, an outer magnetic isolation sheet and a magnetic conductive sheet, and the inner magnetic isolation sheet and the outer magnetic isolation sheet are arranged on the main body. The magnetic conductive sheet is respectively fixed with the inner magnetic isolation sheet and the outer magnetic isolation sheet, the inner magnetic isolation sheet and the outer magnetic isolation sheet are respectively fixed with the main body, the outer magnetic isolation sheet, the magnetic conductive sheet and the main body are encircled to form a first magnet mounting groove, and the inner magnetic isolation sheet, the magnetic conductive sheet, the outer magnetic isolation sheet and the main body are encircled to form a second magnet mounting groove. And the inner magnetic isolation sheet, the magnetic conduction sheet and the first magnet mounting groove are sequentially arranged along the radial direction of the main body. The beneficial effects of the utility model are that the effect of guiding a magnetic circuit is realized, the phenomenon of magnetic flux leakage is effectively reduced, the reluctance torque of the motor is improved, the working performance of the motor is improved, and the advantage of less magnetic flux leakage is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of motor rotor laminations, and specifically to a rotor lamination structure that improves the magnetic reluctance torque of a motor. Background Technology

[0002] In recent years, with the emergence of a new round of technological revolution and industrial transformation, the new energy vehicle industry has entered a stage of accelerated development. After years of continuous efforts, my country's new energy vehicle industry has achieved significant improvements in technology, a more complete industrial system, and greatly enhanced enterprise competitiveness, presenting a positive situation of "dual improvement" in market size and development quality. As the power source of automobiles, the electric motor provides power output for new energy vehicles.

[0003] Chinese utility model patent CN218867999U discloses a rotor lamination, a rotor core, a rotor, a motor, a compressor, and a vehicle. The rotor lamination includes: a lamination body; a shaft hole on the lamination body; and multiple slot groups on the lamination body, arranged at intervals around the shaft hole. Each slot group includes a magnet slot and a magnetic shielding portion. The magnet slot is located between the magnetic shielding portion and the shaft hole. The magnetic shielding portion includes a first magnetic shielding slot and a second magnetic shielding slot. The side of the first magnetic shielding slot facing the magnetic pole centerline is a first side, and the side of the second magnetic shielding slot facing the magnetic pole centerline is a second side.

[0004] Electric motors output power through reluctance torque. However, existing motor laminations exhibit significant magnetic leakage, leading to a reduction in magnetic flux concentrated along the d-axis, which in turn reduces reluctance torque and degrades motor performance. Therefore, existing technologies suffer from significant magnetic leakage. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a rotor lamination structure for improving the magnetic reluctance torque of a motor, which includes a main body and multiple magnet mounting structures. This rotor lamination structure for improving the magnetic reluctance torque of a motor has the advantage of less magnetic leakage.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A rotor lamination structure for improving the reluctance torque of a motor includes a main body and multiple magnet mounting structures. The multiple magnet mounting structures are mounted on the main body. The main body has through slots that mate with the magnet mounting structures. Each magnet mounting structure includes an inner magnetic shield, an outer magnetic shield, and a magnetic guide sheet. The magnetic guide sheet is fixed to the inner and outer magnetic shields, respectively. The inner and outer magnetic shields are fixed to the main body. The outer magnetic shield, the magnetic guide sheet, and the main body surround to form a first magnet mounting slot. The inner magnetic shield, the magnetic guide sheet, the outer magnetic shield, and the main body surround to form a second magnet mounting slot. The inner magnetic shield, the magnetic guide sheet, and the first magnet mounting slot are arranged sequentially along the radial direction of the main body.

[0008] By using this configuration, the magnetic circuit at the end of the permanent magnet is blocked by the outer and inner magnetic insulating sheets, allowing the magnetic circuit to extend along the inner and outer magnetic insulating sheets. This guides the magnetic circuit, effectively reducing magnetic leakage, increasing the motor's magnetic reluctance torque, improving the motor's performance, and achieving the advantage of less magnetic leakage.

[0009] Preferably, the magnet mounting structure is provided with two external magnetic isolation plates, which are symmetrically arranged with the first magnet mounting slot as the center.

[0010] This configuration increases reluctance torque and improves motor performance.

[0011] Preferably, there are two second magnet mounting slots, and each of the two second magnet mounting slots corresponds to one of the two outer magnetic insulating sheets.

[0012] This configuration increases the reluctance torque, thereby improving motor performance.

[0013] Preferably, the inner magnetic insulating sheet has a protrusion at the end away from the magnetic conductive sheet, and the protrusion is engaged with the main body.

[0014] This design enhances the structural stability between the inner magnetic separator and the main body.

[0015] Preferably, the inner magnetic shield has two protrusions, which are located on both sides of the inner magnetic shield.

[0016] This configuration improves the structural stability of the inner magnetic separator.

[0017] Preferably, the inner magnetic insulating sheet has a wedge-shaped block at one end near the magnetic conductive sheet, and the wedge-shaped block engages with the magnetic conductive sheet.

[0018] This configuration improves the structural stability between the inner magnetic insulating sheet and the magnetic conductive sheet.

[0019] Preferably, the width of the wedge block gradually decreases along the direction close to the magnetic sheet.

[0020] This design ensures the magnetic flux between the inner and outer magnetic separators.

[0021] Preferably, the outer magnetic shielding sheet includes a supporting section and an abutting section, wherein the supporting section is located at one end of the outer magnetic shielding sheet near the second magnet mounting groove, and the abutting section is located at one end of the outer magnetic shielding sheet near the first magnet mounting groove.

[0022] This setup achieves the effect of engaging the permanent magnets in the first and second magnet mounting slots via an external magnetic insulating sheet.

[0023] Preferably, the width of the support section is greater than the width of the abutment section.

[0024] This design ensures the magnetic flux between the inner and outer magnetic separators.

[0025] Preferably, the plurality of magnet mounting structures are evenly distributed around the circumference.

[0026] This design improves the stability of the main body rotation when the permanent magnet installed within the magnet mounting structure drives it.

[0027] Compared with the prior art, this utility model has achieved beneficial technical effects:

[0028] 1. By using outer and inner magnetic insulating sheets to block the magnetic circuit at the end of the permanent magnet, the magnetic circuit extends along the inner and outer magnetic insulating sheets, thus guiding the magnetic circuit. This effectively reduces magnetic leakage, increases the reluctance torque of the motor, improves the motor's performance, and achieves the advantage of less magnetic leakage.

[0029] 2. By connecting the main body and the magnetic conductor with the inner and outer magnetic shielding sheets respectively, the stability between the main body and the magnetic conductor can be effectively guaranteed. The permanent magnet located in the first magnet mounting slot can be snapped into the main body through the outer magnetic shielding sheet, the magnetic conductor, and the main body respectively. The permanent magnet located in the second magnet mounting slot can be snapped into the main body through the inner magnetic shielding sheet, the magnetic conductor, and the outer magnetic shielding sheet respectively, thereby improving the stability of the permanent magnet. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a rotor lamination structure for improving the reluctance torque of a motor according to an embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of the magnet mounting structure in an embodiment of this utility model.

[0032] The technical features referred to by the various reference numerals in the accompanying drawings are as follows:

[0033] 11. Main body; 12. Through groove; 13. First magnet mounting groove; 14. Second magnet mounting groove; 21. Inner magnetic shielding sheet; 22. Outer magnetic shielding sheet; 23. Protrusion; 24. Wedge block; 25. Magnetic guide sheet; 26. Support section; 27. Abutment section. Detailed Implementation

[0034] To make the objectives, technical solutions and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments. However, the scope of protection of this utility model is not limited to the specific embodiments described below.

[0035] refer to Figure 1 and Figure 2 A rotor lamination structure for improving the magnetic reluctance torque of a motor includes a main body 11 and multiple magnet mounting structures. The multiple magnet mounting structures are mounted on the main body 11, and the main body 11 has through slots 12 that mate with the magnet mounting structures. The multiple magnet mounting structures are evenly distributed circumferentially, with gaps between adjacent magnet mounting structures. The even circumferential distribution of the multiple magnet mounting structures on the main body 11 improves the stability of the rotation of the main body 11 when the permanent magnets mounted within the magnet mounting structures drive it.

[0036] The magnet mounting structure includes an inner magnetic shield 21, an outer magnetic shield 22, and a magnetic guide plate 25. The magnetic guide plate 25 is fixed to the inner magnetic shield 21 and the outer magnetic shield 22, respectively. The inner magnetic shield 21 and the outer magnetic shield 22 are fixed to the main body 11, respectively. The outer magnetic shield 22, the magnetic guide plate 25, and the main body 11 surround to form a first magnet mounting groove 13. The inner magnetic shield 21, the magnetic guide plate 25, the outer magnetic shield 22, and the main body 11 surround to form a second magnet mounting groove 14. The inner magnetic shield 21, the magnetic guide plate 25, and the first magnet mounting groove 13 are arranged sequentially along the radial direction of the main body 11. The inner magnetic shield 21, the outer magnetic shield 22, and the magnetic guide plate 25 are located within a through groove 12. The first magnet mounting slot 13 and the second magnet mounting slot 14 are used to install permanent magnets. When the permanent magnets are installed in the first magnet mounting slot 13 and the second magnet mounting slot 14, an electromagnetic coil generates a magnetic field around the main body 11. The magnetic force drives the permanent magnets to rotate the main body 11, thereby enabling the main body 11 to output power.

[0037] The magnet mounting structure includes two external magnetic isolation plates 22, symmetrically arranged around the first magnet mounting slot 13. These two plates isolate the magnetic circuits at both ends of the first magnet mounting slot 13, further reducing magnetic leakage, increasing reluctance torque, and improving motor performance. Two second magnet mounting slots 14 are provided, each corresponding to one of the two external magnetic isolation plates 22. The two second magnet mounting slots 14 allow for the installation of permanent magnets. The number of permanent magnets installed at different positions increases the reluctance torque, thus improving motor performance.

[0038] The inner magnetic shield 21 has a protrusion 23 at the end away from the magnetic conductor 25, which engages with the main body 11. The protrusion 23 engages with the main body 11, improving the structural stability between the inner magnetic shield 21 and the main body 11. The inner magnetic shield 21 has two protrusions 23, located on both sides. These protrusions on both sides of the inner magnetic shield 21 provide support to the inner magnetic shield 21, balancing the forces and improving its structural stability. The inner magnetic shield 21 has a wedge-shaped block 24 at the end near the magnetic conductor 25, which engages with the magnetic conductor 25. This engagement further improves the structural stability between the inner magnetic shield 21 and the magnetic conductor 25. The width of the wedge-shaped block 24 gradually decreases towards the magnetic conductor 25. The wedge block 24 has a smaller width at the end near the magnetic conductor 25, which reduces the influence of the wedge block 24 on the magnetic circuit at the magnetic conductor 25 and ensures the magnetic flux between the inner magnetic separator 21 and the outer magnetic separator 22.

[0039] The outer magnetic shield 22 includes a support section 26 and an abutment section 27. The support section 26 is located at one end of the outer magnetic shield 22 near the second magnet mounting groove 14, and the abutment section 27 is located at one end of the outer magnetic shield 22 near the first magnet mounting groove 13. By engaging the abutment section 27 and the support section 26 with the permanent magnets in the first magnet mounting groove 13 and the second magnet mounting groove 14 respectively, the outer magnetic shield 22 achieves the effect of engaging with the permanent magnets in the first magnet mounting groove 13 and the second magnet mounting groove 14. The width of the support section 26 is greater than the width of the abutment section 27. The larger width of the support section 26 increases the contact area between the support section 26 and the main body 11, keeping the outer magnetic shield 22 stable. The smaller width of the abutment section 27 prevents the outer magnetic shield groove from being too wide and affecting the magnetic circuit between the first magnet mounting groove 13 and the second magnet mounting groove 14, thus ensuring the magnetic flux between the inner magnetic shield 21 and the outer magnetic shield 22.

[0040] This embodiment has the following advantages:

[0041] By blocking the magnetic circuit at the end of the permanent magnet with the outer magnetic shield 22 and the inner magnetic shield 21, the magnetic circuit extends along the inner magnetic shield 21 and the outer magnetic shield 22, thereby achieving the effect of guiding the magnetic circuit. This effectively reduces magnetic leakage, improves the reluctance torque of the motor, and enhances the working performance of the motor, achieving the advantage of less magnetic leakage.

[0042] By connecting the main body 11 and the magnetic conductor 25 with the inner magnetic shield 21 and the outer magnetic shield 22 respectively, the stability between the main body 11 and the magnetic conductor 25 can be effectively guaranteed. The permanent magnet located in the first magnet mounting groove 13 can be snapped into the main body 11 through the outer magnetic shield 22, the magnetic conductor 25 and the main body 11 respectively. The permanent magnet located in the second magnet mounting groove 14 can be snapped into the main body 11 through the inner magnetic shield 21, the magnetic conductor 25 and the outer magnetic shield 22 respectively, thereby improving the stability of the permanent magnet.

[0043] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the utility model.

Claims

1. A rotor lamination structure for improving the magnetic reluctance torque of an electric motor, characterized in that: The system includes a main body (11) and multiple magnet mounting structures. The multiple magnet mounting structures are mounted on the main body (11). The main body (11) has through slots (12) that mate with the magnet mounting structures. Each magnet mounting structure includes an inner magnetic shield (21), an outer magnetic shield (22), and a magnetic guide plate (25). The magnetic guide plate (25) is fixed to the inner magnetic shield (21) and the outer magnetic shield (22), respectively. 22) Fixed to the main body (11) respectively, the outer magnetic shield (22), the magnetic guide (25) and the main body (11) surround to form a first magnet mounting groove (13), the inner magnetic shield (21), the magnetic guide (25), the outer magnetic shield (22) and the main body (11) surround to form a second magnet mounting groove (14), the inner magnetic shield (21), the magnetic guide (25) and the first magnet mounting groove (13) are arranged in sequence along the radial direction of the main body (11).

2. The rotor lamination structure for improving motor reluctance torque according to claim 1, characterized in that: The magnet mounting structure is provided with two external magnetic isolation plates (22), which are symmetrically arranged with the first magnet mounting groove (13) as the center.

3. The rotor lamination structure for improving motor reluctance torque according to claim 2, characterized in that: There are two second magnet mounting slots (14), and each of the two second magnet mounting slots (14) corresponds to one of the two outer magnetic insulating sheets (22).

4. The rotor lamination structure for improving motor reluctance torque according to claim 1, characterized in that: The inner magnetic shield (21) has a protrusion (23) at one end away from the magnetic conductor (25), and the protrusion (23) is engaged with the main body (11).

5. The rotor lamination structure for improving motor reluctance torque according to claim 4, characterized in that: The inner magnetic shield (21) has two protrusions (23), which are located on both sides of the inner magnetic shield (21).

6. The rotor lamination structure for improving motor reluctance torque according to claim 1, characterized in that: The inner magnetic insulating sheet (21) has a wedge-shaped block (24) at one end near the magnetic conductive sheet (25), and the wedge-shaped block (24) is engaged with the magnetic conductive sheet (25).

7. The rotor lamination structure for improving motor reluctance torque according to claim 6, characterized in that: The width of the wedge block (24) gradually decreases along the direction close to the magnetic sheet (25).

8. The rotor lamination structure for improving motor reluctance torque according to claim 1, characterized in that: The outer magnetic shield (22) includes a support section (26) and an abutment section (27). The support section (26) is located at one end of the outer magnetic shield (22) near the second magnet mounting groove (14), and the abutment section (27) is located at one end of the outer magnetic shield (22) near the first magnet mounting groove (13).

9. The rotor lamination structure for improving motor reluctance torque according to claim 8, characterized in that: The width of the support section (26) is greater than the width of the abutment section (27).

10. The rotor lamination structure for improving the reluctance torque of a motor according to claim 1, characterized in that: The multiple magnet mounting structures are evenly distributed around the circumference.

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