CN210806877U - Built-in permanent magnet opposite-impact type motor rotor magnetic leakage reducing structure - Google Patents
Built-in permanent magnet opposite-impact type motor rotor magnetic leakage reducing structure Download PDFInfo
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- CN210806877U CN210806877U CN201920866149.6U CN201920866149U CN210806877U CN 210806877 U CN210806877 U CN 210806877U CN 201920866149 U CN201920866149 U CN 201920866149U CN 210806877 U CN210806877 U CN 210806877U
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Abstract
The utility model aims to provide a magnetic leakage reducing structure of a built-in permanent magnet hedging motor rotor, which reduces the magnetic leakage phenomenon; comprises a silicon steel sheet 1, a clamping groove 2 and a magnet 3; the number of the clamping grooves 2 is 5, and the clamping grooves are uniformly distributed on the silicon steel sheet 1 in a circumferential manner; 10 magnets 3 are arranged, and every two magnets 3 are matched with one clamping groove 2; the outer diameter edge of the silicon steel sheet 1 is arc-shaped, 10 arc-shaped edges are arranged, and 10 arc-shaped edges are uniformly distributed; the beneficial effects of the utility model are that reduce stress concentration, improve structural strength, improve permanent magnet's utilization ratio.
Description
Technical Field
The utility model relates to a permanent magnetism offset motor technical field especially relates to a concealed permanent magnetism offset motor rotor magnetic leakage structure.
Background
In order to improve cogging torque, a conventional built-in permanent magnet motor adopts a skewed slot structure for a motor stator or adopts an angle that a pole face is unfolded into a non-integer number of slots in cooperation with the number of slots of the stator. But the magnetic flux leakage phenomenon still exists at present, and improvement is needed.
The published Chinese utility model patent has the publication number: CN2497468, patent name: motor rotor with built-in permanent magnet, application date: 20010926, it discloses a motor rotor with built-in permanent magnets, which has several axial magnet slots for the built-in permanent magnets, the magnet slots form the outer arc of the petal and a shaft hole for the mandrel set, the center of the petal arc and the center of the rotor form a position difference R2, the radius R1 of the arc is smaller than the radius R of the rotor, and R1+ R2 is R. The structure improves the magnetic field distribution in the air gap of the motor, leads the magnetic field distribution to be close to sine wave distribution, improves the defect of overlarge cogging torque and simplifies the winding construction of the motor; and an axial empty slot is arranged between the adjacent positions of the magnet slots and the shaft hole, so that the permanent magnet flux leakage between the poles is prevented, the inertia of the motor rotor is reduced, and the starting time and the no-load current of the motor are reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a concealed permanent magnetism is to towards formula motor rotor magnetic leakage structure, reduces the magnetic leakage phenomenon.
The utility model provides a magnetic leakage reducing structure of a built-in permanent magnet opposed motor rotor, which comprises a silicon steel sheet 1, a clamping groove 2 and a magnet 3;
the number of the clamping grooves 2 is 5, and the clamping grooves are uniformly distributed on the silicon steel sheet 1 in a circumferential manner; 10 magnets 3 are arranged, and every two magnets 3 are matched with one clamping groove 2; the outer diameter edge of the silicon steel sheet 1 is arc-shaped, 10 arc-shaped edges are arranged, and 10 arc-shaped edges are uniformly distributed.
The clamping groove 2 further comprises a middle bulge 21, two side bulges 22 and a magnet hole 23; the middle bulge 21 is arranged between the two magnet holes 23; the two-side protrusions 22 are respectively disposed at both sides of the magnet hole 23.
Preferably, both ends of the outwardly protruding portion of the middle protrusion 21 are provided in a hook shape, and the outer edge of the hook shape is provided with a chamfer.
Preferably, the magnets 3 correspond to the magnet holes 23 one to one.
Preferably, the outer edge of the protruding portion of the two side protrusions 22 is arranged in a chamfer manner, the outer edge of the bottom of the two side protrusions 22 is arranged in a chamfer manner, and the middle of the protruding portion of the middle protrusion 21 is arranged in a chamfer manner.
Preferably, the distance between the protrusions 22 at two sides of the bottom of each two adjacent clamping grooves 2 is less than 0.4 mm. To reduce external rotor flux leakage.
Preferably, the distance between the outer edge of the magnet hole 23 and the edge of the silicon steel sheet 1 is less than 0.4 mm. The proportion of leakage flux can be further reduced.
The beneficial effects of the utility model are that reduce stress concentration, improve structural strength, improve permanent magnet's utilization ratio.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation of the present invention;
in the figure, the position of the upper end of the main shaft,
1. a silicon steel sheet; 2. the magnetic iron comprises a clamping groove 21, a middle bulge 22, two side bulges 23 and a magnet hole; 3. and a magnet.
Detailed Description
The present invention will now be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way.
The utility model provides a magnetic leakage reducing structure of a built-in permanent magnet opposed motor rotor, which comprises a silicon steel sheet 1, a clamping groove 2 and a magnet 3;
the number of the clamping grooves 2 is 5, and the clamping grooves are uniformly distributed on the silicon steel sheet 1 in a circumferential manner; 10 magnets 3 are arranged, and every two magnets 3 are matched with one clamping groove 2; the outer diameter edge of the silicon steel sheet 1 is arc-shaped, 10 arc-shaped edges are arranged, and 10 arc-shaped edges are uniformly distributed.
The outer diameter edge of the silicon steel sheet 1 is arranged in an arc shape, so that the uniformity of an air gap is changed, and the purpose of reducing cogging torque is achieved.
The clamping groove 2 further comprises a middle bulge 21, two side bulges 22 and a magnet hole 23; the middle bulge 21 is arranged between the two magnet holes 23; the two-side protrusions 22 are respectively disposed at both sides of the magnet hole 23. The middle bulge 21 and the two side bulges 22 of the clamping groove 2 close to the root part of the magnet hole 23 can effectively reduce the proportion of magnetic leakage, and the hollow shape changes by the shape characteristic of the attached magnet.
In this embodiment, it is preferable that both ends of the outward protruding portion of the middle protrusion 21 are provided with a hook shape, and the outer edge of the hook shape is provided with a chamfer. So as to reduce stress concentration and improve structural strength.
In this embodiment, the magnets 3 preferably correspond to the magnet holes 23 one to one.
In this embodiment, it is preferable that the outer edge of the protruding portion of the two side protrusions 22 is a chamfer, the outer edge of the bottom of the two side protrusions 22 is a chamfer, and the middle of the protruding portion of the middle protrusion 21 is a chamfer. The stress concentration can be reduced, and the strength of the rotor is improved.
In this embodiment, preferably, the distance between the protrusions 22 at two sides of the bottom of each two adjacent slots 2 is less than 0.4 mm. To reduce external rotor flux leakage.
In the preferred embodiment, the distance between the outer edge of the magnet hole 23 and the edge of the silicon steel sheet 1 is less than 0.4 mm. The proportion of leakage flux can be further reduced.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A flux leakage reducing structure of a built-in permanent magnet opposed-impact motor rotor comprises a silicon steel sheet (1), a clamping groove (2) and a magnet (3);
it is characterized in that the preparation method is characterized in that,
the number of the clamping grooves (2) is 5, and the clamping grooves are uniformly distributed on the silicon steel sheet (1) in a circumferential manner; 10 magnets (3) are arranged, and every two magnets (3) are matched with one clamping groove (2); the outer diameter edge of the silicon steel sheet (1) is arc-shaped, 10 arc-shaped edges are arranged, and 10 arc-shaped edges are uniformly distributed;
the clamping groove (2) further comprises a middle bulge (21), two side bulges (22) and a magnet hole (23); the middle bulge (21) is arranged between the two magnet holes (23); the two side bulges (22) are respectively arranged at two sides of the magnet hole (23).
2. The structure of claim 1, wherein the two ends of the outward protruding part of the middle protrusion (21) are arranged in a hook shape, and the outer edge of the hook shape is arranged in a chamfer.
3. The rotor leakage reducing structure of the built-in permanent magnet opposed-impact motor according to claim 2, wherein the magnets (3) are in one-to-one correspondence with the magnet holes (23).
4. The structure of claim 3, wherein the outer edge of the protruding portion of the two side protrusions (22) is chamfered, the outer edge of the bottom of the two side protrusions (22) is chamfered, and the middle of the protruding portion of the middle protrusion (21) is chamfered.
5. The structure of claim 4, wherein the distance between the protrusions (22) at two sides of the bottom of each two adjacent slots (2) is less than 0.4mm, so as to reduce the external leakage of the rotor.
6. The rotor of the built-in permanent magnet opposed-impact motor according to claim 5, wherein the distance between the outer edge of the magnet hole (23) and the edge of the silicon steel sheet (1) is less than 0.4mm, so as to further reduce the leakage ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920866149.6U CN210806877U (en) | 2019-06-11 | 2019-06-11 | Built-in permanent magnet opposite-impact type motor rotor magnetic leakage reducing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920866149.6U CN210806877U (en) | 2019-06-11 | 2019-06-11 | Built-in permanent magnet opposite-impact type motor rotor magnetic leakage reducing structure |
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| Publication Number | Publication Date |
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| CN210806877U true CN210806877U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920866149.6U Active CN210806877U (en) | 2019-06-11 | 2019-06-11 | Built-in permanent magnet opposite-impact type motor rotor magnetic leakage reducing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI825519B (en) * | 2021-08-31 | 2023-12-11 | 東元精電股份有限公司 | Rotor structure of rotating motor |
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2019
- 2019-06-11 CN CN201920866149.6U patent/CN210806877U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI825519B (en) * | 2021-08-31 | 2023-12-11 | 東元精電股份有限公司 | Rotor structure of rotating motor |
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