Rotor punching sheet structure for improving motor performance

Abstract

The utility model discloses a rotor punching sheet structure capable of improving motor performance, comprising a sheet body, the sheet body is provided with a plurality of first magnet installation grooves, one side of each first magnet installation groove close to the center of the sheet body is provided with two second magnet installation grooves, two ends of each first magnet installation groove are provided with outer magnetic isolation grooves arranged on the sheet body, and the outer magnetic isolation grooves are provided with outer magnetic isolation grooves. The outer magnetic isolation groove is communicated with the first magnet installation groove and the second magnet installation groove, the sheet body is provided with a positioning block located in the outer magnetic isolation groove, and the end, away from the first magnet installation groove, of the positioning block is connected with the sheet body in a clamped mode. The beneficial effects of the utility model are that through the arrangement of the outer magnetic isolation grooves, the magnetic circuits at the two ends of the first magnet installation groove are blocked, thereby reducing the eddy current loss at the two ends of the first magnet installation groove, reducing the magnetic leakage, improving the torque of the motor, and achieving the advantage of small eddy current loss.

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 motor performance. Background Technology

[0002] The motor rotor is the rotating part of the motor. The motor rotor includes an iron core and permanent magnets embedded in the iron core. The iron core is made up of multiple laminations stacked together.

[0003] Chinese invention patent application CN118694043A discloses a rotor lamination, a design method for the rotor lamination, and a motor. The rotor lamination includes a lamination body with multiple magnetic slots. Magnetic isolation bridges are defined between adjacent magnetic slots and between the magnetic slots and the edges of the lamination body. The magnetic isolation bridge includes an arc-shaped portion and straight portions on both sides of the arc-shaped portion. The arc-shaped portion includes N consecutive arc segments, which are arranged sequentially at both ends or facing one side, and the arc segments at both ends are connected to the straight portions. By optimizing the magnetic isolation bridge structure while maintaining its shape as much as possible, the magnetic isolation bridge can effectively limit leakage flux and improve electromagnetic performance. Simultaneously, the N consecutive arc segments can disperse and balance the force, thereby improving the strength and stability of the magnetic isolation bridge and mitigating stress concentration issues.

[0004] Existing rotor laminations exhibit significant eddy current losses and magnetic leakage at the magnet slot ends, leading to reduced reluctance torque utilization and decreased motor torque. Therefore, existing rotor laminations suffer from the technical problem of high eddy current losses. 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 motor performance, which includes a lamination body. This rotor lamination structure for improving motor performance has the advantage of achieving low eddy current loss.

[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 motor performance includes a lamination body. The lamination body has multiple first magnet mounting slots. Two second magnet mounting slots are provided on the side of the first magnet mounting slots near the center of the lamination body. The two second magnet mounting slots are symmetrically arranged with the first magnet mounting slots as the center. External magnetic isolation slots are provided on the lamination body at both ends of the first magnet mounting slots. The external magnetic isolation slots at both ends of the first magnet mounting slots are symmetrically arranged with the first magnet mounting slots as the center. The external magnetic isolation slots communicate with the first magnet mounting slots and the second magnet mounting slots, respectively. A positioning block is installed in the lamination body and located in the external magnetic isolation slot. The end of the positioning block away from the first magnet mounting slot is engaged with the lamination body.

[0008] By setting up an external magnetic isolation groove, the magnetic circuit at both ends of the first magnet mounting groove is blocked, thereby reducing eddy current losses at both ends of the first magnet mounting groove, reducing magnetic leakage, increasing the torque of the motor, and achieving the advantage of lower eddy current losses.

[0009] Preferably, the positioning block has a protrusion in the middle, and the protrusion engages with the sheet body.

[0010] This configuration improves the structural stability between the positioning block and the sheet body.

[0011] Preferably, at least two protrusions are provided.

[0012] This setup effectively improves the structural stability between the positioning block and the sheet body.

[0013] Preferably, the sheet body is provided with an auxiliary magnetic isolation groove, which is connected to the end of the second magnet mounting groove away from the positioning block.

[0014] This configuration achieves the advantage of lower eddy current losses.

[0015] Preferably, the auxiliary magnetic isolation groove is connected along the direction close to the center of the sheet.

[0016] This configuration further reduces eddy current losses at the end of the second magnet mounting slot near the center of the sheet.

[0017] Preferably, the sheet body is provided with a plurality of inner magnetic isolation grooves, which are located on the side of the first magnet mounting groove near the center of the sheet body, and the plurality of inner magnetic isolation grooves are evenly distributed around the circumference.

[0018] This configuration reduces eddy current losses at the inner magnetic groove.

[0019] Preferably, the inner magnetic isolation groove is located between adjacent first magnet mounting grooves, and the width of the inner magnetic isolation groove gradually increases in the direction close to the center of the sheet.

[0020] This configuration reduces eddy current losses on the side of the inner magnetic groove closest to the center of the plate.

[0021] Preferably, the positioning block includes a support section, a connecting section, and a bending section, with the connecting section located between the support section and the bending section, the support section located at the second magnet mounting slot, and the bending section located at the first magnet mounting slot.

[0022] This setup enables the positioning of permanent magnets within the first and second magnet mounting slots using positioning blocks.

[0023] Preferably, the width of the support segment is greater than the width of the connecting segment.

[0024] This setting improves the stability of the positioning block.

[0025] Preferably, the end of the bent section away from the connecting section is inclined towards the center of the sheet.

[0026] This setup ensures efficient utilization of reluctance torque.

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

[0028] 1. By setting the external magnetic isolation groove, the magnetic circuit at both ends of the first magnet mounting groove is blocked, thereby reducing eddy current losses at both ends of the first magnet mounting groove, reducing magnetic leakage, increasing motor torque, and achieving the advantage of low eddy current losses. At the same time, the positioning block provides support for the permanent magnets in the first and second magnet mounting grooves, ensuring the stability of the permanent magnet mounting structure.

[0029] 2. By blocking the magnetic circuit at one end of the second magnet mounting slot through the external magnetic isolation groove, the eddy current loss at one end of the second magnet mounting slot is reduced, the leakage flux is reduced, the torque of the motor is increased, and the advantage of low eddy current loss is achieved, thus improving the performance of the motor. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a rotor lamination structure for improving motor performance in an embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of the positioning block, the first magnet mounting groove, and the second magnet mounting groove 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. Sheet body; 12. First magnet mounting slot; 13. Second magnet mounting slot; 21. Outer magnetic isolation slot; 22. Auxiliary magnetic isolation slot; 23. Inner magnetic isolation slot; 31. Positioning block; 32. Protrusion; 33. Support section; 34. Connecting section; 35. Bending 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 2A rotor lamination structure for improving motor performance includes a lamination body 11, which is a magnetic conductor. In this embodiment, the lamination body 11 is made of iron sheet. The lamination body 11 has multiple first magnet mounting slots 12. Two second magnet mounting slots 13 are provided on one side of the first magnet mounting slots 12 near the center of the lamination body 11. The two second magnet mounting slots 13 are symmetrically arranged around the first magnet mounting slots 12, and the multiple first magnet mounting slots 12 are evenly distributed circumferentially. First permanent magnets and second permanent magnets are respectively installed in the first magnet mounting slots 12 and the second magnet mounting slots.

[0036] The first magnet mounting groove 12 has external magnetic isolation grooves 21 at both ends, which are disposed on the sheet 11. These external magnetic isolation grooves 21 are symmetrically arranged around the first magnet mounting groove 12, and communicate with the first magnet mounting groove 12 and the second magnet mounting groove 13, respectively. The sheet 11 is fitted with a positioning block 31 located within the external magnetic isolation groove 21. The end of the positioning block 31 furthest from the first magnet mounting groove 12 is engaged with the sheet 11. The positioning block 31 is made of a non-magnetic material; in this embodiment, it is made of ceramic material. Ceramic positioning blocks have the advantage of high hardness, enabling them to stably support the first and second permanent magnets, thus maintaining their stability within the first and second magnet mounting grooves 12 and 13, respectively. A protrusion 32 is provided in the middle of the positioning block 31, which engages with the sheet 11. This engagement of the protrusion 32 with the sheet 11 improves the structural stability between the positioning block 31 and the sheet 11. Two protrusions 32 are provided, and both protrusions 32 simultaneously engage with the sheet body 11, effectively improving the structural stability between the positioning block 31 and the sheet body 11. The positioning block 31 includes a support section 33, a connecting section 34, and a bending section 35. The connecting section 34 is located between the support section 33 and the bending section 35. The support section 33 is located at the second magnet mounting slot 13, and the bending section 35 is located at the first magnet mounting slot 12. By engaging the first permanent magnet and the second permanent magnet respectively through the support section 33 and the bending section 35, the positioning block 31 can position the permanent magnets in the first magnet mounting slot 12 and the second magnet mounting slot 13. The width of the support section 33 is greater than the width of the connecting section 34. This increases the contact range between the support section 33 and the sheet body 11, allowing the support section 33 to be stably engaged with the sheet body 11 and improving the stability of the positioning block 31. The end of the bending section 35 away from the connecting section 34 is inclined towards the center of the sheet body 11. By setting the bending section 35, the connecting section 34 and the protrusion 32 can be prevented from blocking the magnetic circuit between the first magnet mounting slot 12 and the second magnet mounting slot 13, thus ensuring the utilization rate of magnetic reluctance torque.

[0037] The sheet body 11 is provided with an auxiliary magnetic isolation groove 22, which is connected to the end of the second magnet mounting groove 13 away from the positioning block 31. By blocking the magnetic circuit at one end of the second magnet mounting groove 13 through the auxiliary magnetic isolation groove 22, eddy current losses at that end are reduced, magnetic leakage is reduced, and the motor torque is increased, achieving the advantage of lower eddy current losses and improving motor performance. The auxiliary magnetic isolation groove 22 is connected along a direction close to the center of the sheet body 11. This allows the auxiliary magnetic isolation groove 22 to better block the magnetic circuit at one end of the second magnet mounting groove 13, further reducing eddy current losses at the end of the second magnet mounting groove 13 near the center of the sheet body 11. The sheet body 11 is provided with multiple inner magnetic isolation grooves 23, which are located on the side of the first magnet mounting groove 12 near the center of the sheet body 11, and the multiple inner magnetic isolation grooves 23 are evenly distributed circumferentially. By using the inner magnetic isolation groove 23 to block the magnetic circuit on the side of the first magnet mounting groove 12 and the second magnet mounting groove 13 near the center of the sheet 11, eddy current losses at the inner magnetic isolation groove 23 can be reduced. The inner magnetic isolation groove 23 is located between adjacent first magnet mounting grooves 12, and the width of the inner magnetic isolation groove 23 gradually increases along the direction closer to the center of the sheet 11. The end of the inner magnetic isolation groove 23 closest to the first magnet mounting groove 12 has a smaller width, reducing the influence of the inner magnetic isolation groove 23 on the magnetic circuit and ensuring the utilization rate of reluctance torque. The end of the inner magnetic isolation groove 23 furthest from the first magnet mounting groove 12 has a larger width, reducing eddy current losses on the side of the inner magnetic isolation groove 23 closest to the center of the sheet 11.

[0038] This embodiment has the following advantages:

[0039] By setting the external magnetic isolation groove 21, the magnetic circuit at both ends of the first magnet mounting groove 12 is blocked, thereby reducing eddy current losses at both ends of the first magnet mounting groove 12, reducing magnetic leakage, and increasing the torque of the motor, achieving the advantage of low eddy current losses. At the same time, the positioning block 31 provides support for the permanent magnets in the first magnet mounting groove 12 and the second magnet mounting groove 13, ensuring the stability of the permanent magnet mounting structure.

[0040] By blocking the magnetic circuit at one end of the second magnet mounting slot 13 through the external magnetic isolation slot 21, the eddy current loss at one end of the second magnet mounting slot 13 is reduced, the leakage flux is reduced, and the torque of the motor is increased. This achieves the advantage of lower eddy current loss and improves the performance of the motor.

[0041] 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 motor performance, characterized in that: The device includes a sheet body (11), which has multiple first magnet mounting slots (12). Two second magnet mounting slots (13) are provided on the side of the first magnet mounting slots (12) near the center of the sheet body (11). The two second magnet mounting slots (13) are symmetrically arranged with the first magnet mounting slots (12) as the center. The first magnet mounting slots (12) have external magnetic isolation slots (21) at both ends on the sheet body (11). The external magnetic isolation slots (21) at both ends of the first magnet mounting slots (12) are symmetrically arranged with the first magnet mounting slots (12) as the center. The external magnetic isolation slots (21) are respectively connected to the first magnet mounting slots (12) and the second magnet mounting slots (13). The sheet body (11) is equipped with a positioning block (31) located in the external magnetic isolation slot (21). The end of the positioning block (31) away from the first magnet mounting slot (12) is engaged with the sheet body (11).

2. The rotor lamination structure for improving motor performance according to claim 1, characterized in that: The positioning block (31) has a protrusion (32) in the middle, and the protrusion (32) is engaged with the sheet (11).

3. The rotor lamination structure for improving motor performance according to claim 2, characterized in that: At least two protrusions (32) are provided.

4. The rotor lamination structure for improving motor performance according to claim 1, characterized in that: The sheet body (11) is provided with an auxiliary magnetic isolation groove (22), which is connected to the end of the second magnet mounting groove (13) away from the positioning block (31).

5. The rotor lamination structure for improving motor performance according to claim 4, characterized in that: The auxiliary magnetic isolation groove (22) is connected in a direction close to the center of the sheet (11).

6. The rotor lamination structure for improving motor performance according to claim 1, characterized in that: The sheet body (11) is provided with a plurality of inner magnetic isolation grooves (23), the inner magnetic isolation grooves (23) are located on the side of the first magnet mounting groove (12) near the center of the sheet body (11), and the plurality of inner magnetic isolation grooves (23) are evenly distributed around the circumference.

7. The rotor lamination structure for improving motor performance according to claim 6, characterized in that: The inner magnetic isolation groove (23) is located between adjacent first magnet mounting grooves (12), and the width of the inner magnetic isolation groove (23) gradually increases along the direction close to the center of the sheet (11).

8. The rotor lamination structure for improving motor performance according to claim 1, characterized in that: The positioning block (31) includes a support section (33), a connecting section (34) and a bending section (35). The connecting section (34) is located between the support section (33) and the bending section (35). The support section (33) is located at the second magnet mounting groove (13), and the bending section (35) is located at the first magnet mounting groove (12).

9. The rotor lamination structure for improving motor performance according to claim 8, characterized in that: The width of the support segment (33) is greater than the width of the connecting segment (34).

10. The rotor lamination structure for improving motor performance according to claim 8, characterized in that: The end of the bent section (35) away from the connecting section (34) is inclined toward the center of the sheet (11).

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