CN216489962U - Permanent magnet motor rotor structure - Google Patents
Permanent magnet motor rotor structure Download PDFInfo
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- CN216489962U CN216489962U CN202123256977.4U CN202123256977U CN216489962U CN 216489962 U CN216489962 U CN 216489962U CN 202123256977 U CN202123256977 U CN 202123256977U CN 216489962 U CN216489962 U CN 216489962U
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- magnetic shoe
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- permanent magnet
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Abstract
The utility model relates to a permanent-magnet machine technical field discloses a permanent-magnet machine rotor structure. The utility model improves the shape and structure of the magnetic shoe and the rotor core, the matching surface of the magnetic shoe and the rotor core is a plane, which is convenient for the magnetic shoe and the rotor core to be bonded and the bonding is uniform; the outer surface of the magnetic shoe is arranged into an arc surface which protrudes outwards and has the same radius, so that the sine of the air gap magnetic flux density waveform is obviously improved, the torque fluctuation is obviously reduced, the noise is reduced, and the running performance of the motor is improved; in addition, the sand grip on the rotor core is matched with the magnetic shoe through the convex clamping and the clamping groove, so that the connection stability of the magnetic shoe and the rotor core is improved, and the condition that the magnetic shoe falls off is avoided. The utility model discloses the structure has improved the structural stability of rotor subassembly, reduces the electromagnetic noise in the motor operation, improves the stability of motor operation in-process.
Description
Technical Field
The utility model relates to a permanent-magnet machine technical field especially relates to a permanent-magnet machine rotor structure.
Background
At present, the rotor of the permanent magnet synchronous motor mostly adopts a surface-mounted magnetic shoe structure, a motor rotor component comprises a rotating shaft, a rotor core and a permanent magnet, and the permanent magnet is mostly a magnetic shoe. The inner surface and the outer surface of a magnetic shoe of a traditional motor rotor are designed coaxially, so that the overall thickness of the magnetic shoe is consistent, but the actual working condition is that the magnetic shoe mainly acts on the middle part of the magnetic shoe, and magnetic circuits on two sides of the magnetic shoe are not easy to be impacted by strong current in the operation process; the motor rotor component of the magnetic shoe with the structure has the advantages that the electric clearance between the stator and the rotor is uneven, the stress is uneven in the running process of the motor, the torque fluctuation is caused, the strong vibration and noise are caused, and the use performance of the motor is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a structure more stable, reliable and reduce electromagnetic noise's permanent-magnet machine rotor structure.
The utility model provides a technical scheme that its technical problem adopted is: the permanent magnet motor rotor structure comprises a rotor core and a plurality of magnetic shoes, wherein the rotor core is a regular prism, the rotor core is provided with a cylindrical through hole penetrating through two bottom surfaces of the rotor core, and the central axis of the cylindrical through hole and the central axis of the rotor core are positioned on the same straight line;
each side surface on the peripheral surface of the rotor core is a connecting surface; the inner surface of the magnetic shoe is a vertical plane, and the inner surface of the magnetic shoe is attached to the connecting surface of the rotor core; the outer surface of the magnetic shoe is an arc surface which protrudes to the direction far away from the inner surface;
the side edge of the rotor core is provided with a convex strip fixedly connected with the rotor core, and the length direction of the convex strip and the axial direction of the rotor core are positioned in the same direction; the convex strips are matched with the magnetic shoes in a clamping mode through the clamping protrusions and the clamping grooves.
The matching surface of the rotor core and the magnetic shoe is a plane, and the matching surface of the magnetic shoe and the rotor core is also a plane, so that the rotor core and the magnetic shoe are easy to be attached, uniform adhesion is convenient to realize, and the structural stability can be realized; the outer side surface of the magnetic shoe is designed into an arc surface with equal radius, so that the air gap magnetic flux density waveform sine is obviously improved, the torque fluctuation is obviously reduced, the noise is reduced, and the motor running performance is improved under the condition of parallel magnetization of the magnetic shoe; the convex strip and the magnetic shoe are matched through clamping of the clamping protrusion and the clamping groove, connection stability of the magnetic shoe and the rotor core is improved, and the situation that the magnetic shoe falls off is avoided.
Further, the method comprises the following steps: and a cutting plane is arranged on the edge of the outer surface of the magnetic shoe close to the raised line along the extending direction of the side edge. Through the angle cutting process, the cogging torque is reduced, the pole arc effect is optimized, and the stability of the motor in the running process is improved.
Further, the method comprises the following steps: the magnetic shoe is characterized in that a clamping protrusion is arranged at the top of the convex strip, clamping grooves matched with the clamping protrusion are formed in the two side walls, close to the convex strip, of the magnetic shoe, and the magnetic shoe is in clamping fit with the convex strip.
Further, the method comprises the following steps: the cross section of each convex strip is T-shaped.
Further, the method comprises the following steps: the height of the convex strip is smaller than the minimum thickness of the magnetic shoe.
Further, the method comprises the following steps: and one end of the rotor core is fixedly provided with a limiting circular plate, and the diameter of the limiting circular plate is greater than the length of the diagonal line of the bottom surface of the rotor core and is smaller than the sum of the length of the diagonal line of the bottom surface of the rotor core and the maximum thickness of the magnetic shoe.
Further, the method comprises the following steps: the rotor core, the convex strips and the limiting circular plates are of an integrally formed structure.
Further, the method comprises the following steps: the cross section of the rotor iron core is in a regular hexagon shape.
The utility model has the advantages that: the utility model improves the shape and structure of the magnetic shoe and the rotor core, the matching surface of the magnetic shoe and the rotor core is a plane, which is convenient for the magnetic shoe and the rotor core to be bonded and the bonding is uniform; the outer surface of the magnetic shoe is arranged into an arc surface which protrudes outwards and has the same radius, so that the sine of the air gap magnetic flux density waveform is obviously improved, the torque fluctuation is obviously reduced, the noise is reduced, and the running performance of the motor is improved; in addition, the protruding cooperation of draw-in groove joint on with the magnetic shoe of the protruding card on the rotor core sand grip increases the stability of being connected of magnetic shoe and rotor core, avoids the condition that the magnetic shoe drops to take place. The utility model discloses the structural stability of rotor subassembly is improved to the structure, reduces the electromagnetic noise in the motor operation, improves the stability of motor operation in-process.
Drawings
Fig. 1 is a schematic structural view of a permanent magnet motor rotor according to the present invention;
fig. 2 is a side view of the structure of the permanent magnet motor rotor according to the present invention;
fig. 3 is an exploded view of the permanent magnet motor rotor structure according to the present invention;
fig. 4 is a schematic structural view of the magnetic shoe of the present invention;
labeled as: rotor core 1, sand grip 11, magnetic shoe 2, internal surface 21, surface 22, spacing circular plate 3.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1, the permanent magnet motor rotor of the present invention, a permanent magnet motor rotor structure, includes a rotor core 1 and a plurality of magnetic tiles 2, the rotor core 1 is a regular prism, the rotor core 1 is provided with a cylindrical through hole penetrating through two bottom surfaces thereof, and a central axis of the cylindrical through hole and a central axis of the rotor core 1 are located on the same straight line; each side surface on the outer peripheral surface of the rotor core 1 is a connecting surface; the inner surface 21 of the magnetic shoe 2 is a vertical plane, and the inner surface 21 of the magnetic shoe 2 is attached to the connecting surface of the rotor core 1; the outer surface 22 of the magnetic shoe 2 is a circular arc surface which protrudes to the direction far away from the inner surface 21; since the inner surface of the magnetic shoe 2 is a plane and the outer surface is a circular arc surface, the thickness of the middle portion in the width direction of the magnetic shoe 2 is the thickest, and preferably, the thickness of the middle portion in the width direction of the magnetic shoe 2 is set to 5-10 mm.
A convex strip 11 fixedly connected with the rotor core 1 is arranged at the side edge of the rotor core 1, and the length direction of the convex strip 11 and the axial direction of the rotor core 1 are positioned in the same direction; the convex strip 11 is matched with the magnetic shoe 2 through the convex block and the clamping groove in a clamping mode. Preferably, 11 tops of sand grip are provided with the card protrudingly, 2 magnetic shoe be close to on the both sides wall of sand grip 11 be provided with the draw-in groove of the protruding looks adaptation of card, 2 magnetic shoe and 11 joint cooperations of sand grip. The magnetic shoe 1 is installed on the 1 side of rotor core between two sand grips 11, and 2 internal surfaces 21 of magnetic shoe suit with 1 side shape size of rotor core, and in the two laminating, the draw-in groove of 2 both sides of magnetic shoe cooperates with the protruding joint of card on the sand grip 11.
Specifically, the outer surface 22 of the magnetic shoe 2 is provided with a cutting plane along the extending direction of the side edge near the edge of the convex strip 11. Through the angle cutting process, the cogging torque is reduced, the pole arc effect is optimized, and the stability of the motor in the running process is improved.
Specifically, the cross section of the rib 11 is T-shaped. The top end of the convex strip 11 is provided with a clamping convex, so that the processing and forming are convenient.
Specifically, the height of the convex strip 11 is smaller than the minimum thickness of the magnetic shoe 2. The setting of 1 surface 22 of sand grip 11 perpendicular to rotor core, the central axis that rotor core 1 was passed to the extending direction of 11 direction of height of sand grip, and the height of sand grip 11 is less than 2 marginal thickness of magnetic shoe, is difficult to cause the magnetic leakage phenomenon, improves motor operating stability.
Specifically, one end of the rotor core 1 is fixedly provided with a limiting circular plate 3, and the diameter of the limiting circular plate 3 is larger than the length of the diagonal line of the bottom surface of the rotor core 1 and smaller than the sum of the length of the diagonal line of the bottom surface of the rotor core 1 and the maximum thickness of the magnetic shoe 2. The limiting circular plate 3 has a limiting effect on the magnetic shoe 2, so that the magnetic shoe 2 is used as a reference for alignment in the axial direction of the rotor core 1 in the pasting process.
Specifically, the rotor core 1, the protruding strips 11, and the limiting circular plate 3 are integrally formed. Through the self-buckling punching of the punching die, the number of the formed rotor parts is reduced by one-step forming, and the whole structure is more compact.
Specifically, the rotor core 1 is a regular hexagonal prism.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. Permanent-magnet machine rotor structure, its characterized in that: the magnetic shoe comprises a rotor core (1) and a plurality of magnetic shoes (2), wherein the rotor core (1) is a regular prism, the rotor core (1) is provided with cylindrical through holes penetrating through two bottom surfaces of the rotor core, and the central axes of the cylindrical through holes and the central axis of the rotor core (1) are positioned on the same straight line;
each side surface on the peripheral surface of the rotor core (1) is a connecting surface; the inner surface (21) of the magnetic shoe (2) is a vertical plane, and the inner surface (21) of the magnetic shoe (2) is attached to the connecting surface of the rotor core (1); the outer surface (22) of the magnetic shoe (2) is a circular arc surface protruding towards the direction far away from the inner surface (21);
a convex strip (11) fixedly connected with the lateral edge of the rotor core (1) is arranged at the lateral edge of the rotor core, and the length direction of the convex strip (11) and the axial direction of the rotor core (1) are positioned in the same direction; the convex strips (11) are matched with the magnetic shoes (2) in a clamping mode through clamping protrusions and clamping grooves.
2. The permanent magnet motor rotor structure of claim 1, wherein: and a cutting plane is arranged on the edge of the outer surface (22) of the magnetic shoe (2) close to the convex strip (11) along the extending direction of the side edge.
3. The permanent magnet motor rotor structure of claim 1, wherein: the magnetic shoe is characterized in that a clamping protrusion is arranged at the top of the convex strip (11), clamping grooves matched with the clamping protrusion are formed in the two side walls, close to the convex strip (11), of the magnetic shoe (2), and the magnetic shoe (2) is in clamping fit with the convex strip (11).
4. A rotor structure for a permanent magnet motor according to claim 3, wherein: the cross section of the convex strip (11) is T-shaped.
5. The permanent magnet motor rotor structure of claim 1, wherein: the height of the convex strip (11) is smaller than the minimum thickness of the magnetic shoe (2).
6. The permanent magnet motor rotor structure of claim 1, wherein: rotor core (1) one end has set firmly spacing plectane (3), the diameter of spacing plectane (3) is greater than rotor core (1) bottom surface diagonal length, and is less than rotor core (1) bottom surface diagonal length and the sum of magnetic shoe (2) maximum thickness.
7. The permanent magnet electric machine rotor structure of claim 6, wherein: the rotor core (1), the convex strips (11) and the limiting circular plates (3) are of an integrally formed structure.
8. The permanent magnet motor rotor structure of claim 1, wherein: the rotor iron core (1) is a regular hexagonal prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123256977.4U CN216489962U (en) | 2021-12-20 | 2021-12-20 | Permanent magnet motor rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123256977.4U CN216489962U (en) | 2021-12-20 | 2021-12-20 | Permanent magnet motor rotor structure |
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| Publication Number | Publication Date |
|---|---|
| CN216489962U true CN216489962U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123256977.4U Active CN216489962U (en) | 2021-12-20 | 2021-12-20 | Permanent magnet motor rotor structure |
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| CN (1) | CN216489962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117353502A (en) * | 2023-12-05 | 2024-01-05 | 泛仕达机电股份有限公司 | Rotor shell, rotor and high-performance ferrite permanent magnet motor |
-
2021
- 2021-12-20 CN CN202123256977.4U patent/CN216489962U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117353502A (en) * | 2023-12-05 | 2024-01-05 | 泛仕达机电股份有限公司 | Rotor shell, rotor and high-performance ferrite permanent magnet motor |
| CN117353502B (en) * | 2023-12-05 | 2024-03-19 | 泛仕达机电股份有限公司 | Rotor shell, rotor and high-performance ferrite permanent magnet motor |
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