CN214069687U - Mixed rotor magnetic circuit structure of permanent magnet synchronous motor - Google Patents
Mixed rotor magnetic circuit structure of permanent magnet synchronous motor Download PDFInfo
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- CN214069687U CN214069687U CN202022923175.3U CN202022923175U CN214069687U CN 214069687 U CN214069687 U CN 214069687U CN 202022923175 U CN202022923175 U CN 202022923175U CN 214069687 U CN214069687 U CN 214069687U
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Abstract
The utility model discloses a permanent magnet synchronous motor hybrid rotor magnetic circuit structure, a plurality of rotor punching sheets are laminated into a rotor core; the rotor punching sheet comprises a plurality of magnetic steel pole regions; each magnetic steel pole area comprises a tangential magnetizing part and a radial magnetizing part; the tangential magnetizing part is configured into a permanent magnet with the magnetizing direction perpendicular to the radial direction of the rotor punching sheet; the radial magnetizing part is configured into a permanent magnet which is magnetized along the radial direction of the rotor punching sheet; the tangential magnetizing part comprises a first radial magnetizing part and a second radial magnetizing part; the first radial magnetizing piece is arranged in a way that the magnetizing direction is vertical to the radial direction of the rotor sheet where the first radial magnetizing piece is positioned; the two second radial magnetizing pieces are symmetrically arranged by taking the first radial magnetizing piece as a symmetry axis, and the two second radial magnetizing pieces are arranged in a V shape; the two radial magnetizing pieces are arranged by taking the first radial magnetizing piece as a symmetry axis; the magnetizing directions of the two radial magnetizing pieces are opposite, and the magnetizing directions of the tangential magnetizing pieces face the same direction. The invention reduces the usage amount of the magnetic steel and saves the cost under the condition of not reducing the air gap flux density.
Description
Technical Field
The utility model relates to a PMSM technical field especially relates to a PMSM hybrid rotor magnetic circuit structure.
Background
The built-in permanent magnet synchronous motor is widely applied to the fields of numerical control machines, industrial electric automation, automatic production lines, industrial robots, various military and civil equipment and the like due to the excellent performances of good weak magnetic performance, high torque density, strong demagnetization resistance of magnetic steel and the like. The traditional built-in motor can be divided into a tangential type and a radial type according to the magnetizing direction of a permanent magnet and the rotating direction of the motor, a tangential type rotor magnetic circuit is applied to the condition of more poles, the air gap flux density can be improved, but the magnetic leakage is relatively large, and the value of the magnetic steel is often large because the magnetic steel polar arc angle and the included angle are fixed, and the torque pulsation, the cogging torque and the back electromotive force distortion rate are difficult to adjust. The radial motor can reduce the three values by adjusting the included angle of the magnetic steel and the polar arc angle, and improves the comprehensive performances of the motor such as NVH (noise, vibration and harshness), but the radial motor only has one permanent magnet section in a pair of polar magnetic circuits to provide magnetic flux per pole, and the air gap flux density is relatively low. Therefore, need to design a novel hybrid rotor magnetic circuit motor promptly, all place the permanent magnet at radial and tangential, can compromise advantage between them, reasonable permanent magnet arrangement and rotor groove's structural design both improved motor power density, reduce the permanent magnet quantity, can promote comprehensive properties such as motor NVH again.
SUMMERY OF THE UTILITY MODEL
The technical scheme of the utility model is that: the utility model provides a permanent magnet synchronous motor hybrid rotor magnetic circuit structure, to the problem that traditional tangential magnetic leakage is great relatively to because magnet steel polar arc angle is fixed rather than the contained angle, be difficult to adjust torque ripple, cogging torque and back electromotive force distortion rate, lead to its value often great.
The hybrid rotor magnetic circuit structure of the permanent magnet synchronous motor comprises rotor punching sheets, wherein a plurality of rotor punching sheets are laminated and pressed to form a rotor core; the rotor punching sheet can be divided into a plurality of magnetic steel pole regions; the areas of the magnetic steel pole regions are equal; and a tangential magnetizing part and a radial magnetizing part are arranged on each magnetic steel pole area.
The radial magnetizing part is configured to be a permanent magnet which is magnetized along the radial direction of the rotor punching sheet. I.e. a permanent magnet whose magnetizing direction coincides with the air gap flux axis.
Specifically, the radial magnetizing part comprises a first radial magnetizing part and a second radial magnetizing part; the first radial magnetizing pieces are magnetized along the radial direction of the rotor punching sheet, and the two first radial magnetizing pieces are symmetrically arranged by taking the first radial magnetizing pieces as a symmetry axis; the two second radial magnetizing pieces are also symmetrically arranged by taking the first radial magnetizing piece as a symmetry axis, and the two second radial magnetizing pieces are arranged in a V shape; and a magnetic steel angle with an angle end point facing the circle center of the rotor punching sheet is formed between the two second radial magnetizing parts.
And the tangential magnetizing part is configured into a permanent magnet with the magnetizing direction perpendicular to the radial direction of the rotor punching sheet. I.e. a permanent magnet whose magnetizing direction is close to perpendicular to the air gap flux axis.
Specifically, the radial magnetizing parts are arranged by taking the tangential magnetizing part as a symmetry axis, and the first radial magnetizing part is positioned between the tangential magnetizing part and the second radial magnetizing part.
The magnetizing directions of the two first radial magnetizing pieces are opposite, and the magnetizing directions of the two second radial magnetizing pieces face the same direction.
Preferably, the magnetic steel angle formed between the two second radial magnetizing parts comprises a first magnetic steel angle and a second magnetic steel angle;
the first magnetic steel angle is configured as an included angle formed between the upward surfaces of the two second radial magnetizing parts;
and the second magnetic steel angle is configured to be an included angle between the farthest vertex angles of the two second radial magnetizing parts along the radial direction of the rotor punching sheet.
Preferably, the first magnetic steel angle is 80-100 degrees, preferably 93 degrees.
Preferably, the second magnetic steel angle is 26-34 degrees, preferably 30 degrees.
Preferably, the rotor punching sheet comprises a magnetic steel groove embedded with the tangential magnetizing piece and the radial magnetizing piece.
Preferably, each magnetic steel groove is provided with a corresponding magnetism isolating groove.
Specifically, a rectangular slot is disposed between the proximal ends of the second radially magnetized member and the tangentially magnetized member.
And magnetic isolation grooves are respectively arranged at two ends of the magnetic steel groove of the radial magnetizing part.
And magnetic isolation grooves are respectively arranged at two ends of the magnetic steel groove of the second radial magnetizing part.
And auxiliary grooves are formed in the rotating surfaces of the rotor punching sheets at two ends close to the radial magnetizing piece.
The utility model has the advantages that:
1. the utility model discloses a permanent magnet of a radial magnetization has replaced two magnet steels of a pair of utmost point of traditional radial rotor, under the circumstances that does not reduce air gap flux density, has reduced the magnet steel quantity, has practiced thrift motor cost.
2. The utility model discloses the magnet steel contained angle and the utmost point arc angle of the radial V word magnet steel that magnetizes are adjusted to the accessible, add the auxiliary tank on the rotor surface, compare traditional tangential rotor magnetic circuit motor, reduce torque ripple, tooth's socket torque and back electromotive force distortion rate effectively, promote comprehensive properties such as motor NVH.
3. The utility model discloses a magnetic isolation groove of rectangle can increase the direct axis magnetic resistance between V word magnet steel and the radial magnet steel that magnetizes, improves salient pole ratio, promotes weak magnetic property, and the inboard half slot of magnet steel can reduce the local magnetic density value of magnet steel corner moreover, promotes high-speed anti demagnetization ability.
Drawings
The invention will be further described with reference to the following drawings and examples:
FIG. 1 is a layout diagram of a hybrid rotor magnetic circuit structure of a permanent magnet synchronous motor;
FIG. 2 is a magnetic steel layout view on a single magnetic steel pole region;
FIG. 3 is a magnetic steel slot layout diagram on a magnetic steel pole region;
wherein, 1, rotor punching sheet; 2. a tangential magnetizing permanent magnet; 3. a V-shaped permanent magnet; 4. a linear permanent magnet is magnetized in the radial direction; 5. removing heavy holes; 6. a rectangular groove; 7. a linear magnetic steel magnetism isolating groove; 8. a rectangular magnetism isolating groove; 9. a V-shaped magnetic steel groove; 10. a linear magnetic steel groove; 11. tangentially magnetizing a magnetic steel groove; 12. the rotor surface assists the groove.
Detailed Description
Example 1:
the utility model provides a PMSM hybrid rotor magnetic circuit structure, includes rotor punching 1, and rotor punching 1 includes a plurality of magnet steel polar regions, and the magnet steel polar region is fan-shaped profile. Each magnetic steel pole area comprises a tangential magnetizing part and a radial magnetizing part, and therefore a magnetic steel groove for embedding and installing the tangential magnetizing part and the radial magnetizing part is arranged on the magnetic steel pole area.
Specifically, the tangential magnetizing part is configured as a permanent magnet with a magnetizing direction perpendicular to the radial direction of the rotor sheet 1. In the embodiment, the tangential magnetizing part is a tangential magnetizing permanent magnet 2, and a tangential magnetizing steel slot 11 is arranged on the magnetic steel pole area to assemble the tangential magnetizing permanent magnet 2.
The radial magnetizing part is configured to be a permanent magnet which is magnetized along the radial direction of the rotor punching sheet.
The radial magnetizing part comprises a first radial magnetizing part and a second radial magnetizing part, and the first radial magnetizing part is used for radially magnetizing along the rotor punching sheet 1. In this embodiment, the first radial magnetizing part is a radial magnetizing linear permanent magnet 4, and a linear magnetic steel groove 10 is arranged on the magnetic steel polar region to arrange the radial magnetizing linear permanent magnet 4.
The two second radial magnetizing parts are symmetrically arranged by taking the first radial magnetizing part as a symmetry axis, the two second radial magnetizing parts are arranged in a V shape, and a magnetic steel angle with an angle end point facing the circle center of the rotor punching sheet 1 is formed between the two second radial magnetizing parts. In this embodiment, the second radial magnetizing unit is a V-shaped permanent magnet 3. Correspondingly, V-shaped magnetic steel grooves 9 are arranged on the magnetic steel pole area to arrange the V-shaped permanent magnets 3.
The radial magnetizing pieces are arranged by taking the first radial magnetizing piece as a symmetry axis, and the first radial magnetizing piece is positioned between the tangential magnetizing piece and the second radial magnetizing piece.
On every magnet steel polar region, the direction of magnetization of two first radial magnetization pieces is opposite, and the direction of magnetization of two second radial magnetization pieces is the same. Each magnetic steel groove is provided with a corresponding magnetism isolating groove, such as: the two ends of the straight magnetic steel magnetism isolation groove 7 are respectively provided with a magnetism isolation groove; magnetic isolation grooves are respectively arranged at two ends of the V-shaped magnetic steel groove 9.
Meanwhile, a rectangular groove 6 is arranged between the V-shaped permanent magnet 3 and the two near ends of the tangential magnetizing permanent magnet. Auxiliary grooves 12 are arranged on the rotating surfaces of the rotor punching sheets at two ends close to the radial magnetizing linear permanent magnet 4.
Example 2:
a mixed rotor magnetic circuit structure of a permanent magnet synchronous motor comprises a rotor punching structure, wherein a tangential magnetizing permanent magnet and a radial magnetizing permanent magnet are arranged in a rotor punching 11, the rotor punching 1 can be divided into a plurality of magnetic steel polar regions, the tangential magnetizing permanent magnet is arranged at the central line position of each magnetic steel polar region, and the magnetizing directions of all the tangential magnetizing permanent magnets on the rotor punching 1 are kept consistent. The radial magnetizing permanent magnets are symmetrically distributed along the tangential magnetizing permanent magnet and comprise radial magnetizing linear permanent magnets 4 and V-shaped permanent magnets 3, the magnetizing directions of the two radial magnetizing linear permanent magnets 4 symmetrically distributed on each magnetic steel pole area are opposite, and the magnetizing directions of the two radial V-shaped permanent magnets 3 symmetrically distributed on each magnetic steel pole area are opposite.
Each permanent magnet is provided with a corresponding magnetic steel groove and a corresponding magnetism isolating groove, specifically, the tangential magnetizing permanent magnet is arranged in the tangential magnetizing magnetic steel groove 11, the V-shaped permanent magnet 3 is arranged in the V-shaped magnetic steel groove 9, and the radial magnetizing linear permanent magnet 4 is arranged in the linear magnetic steel groove 10.
In particular, a rectangular groove 6 is arranged between the V-shaped magnetic steel groove 9 and the inner side of the tangential magnetizing steel groove 11. Triangular grooves are formed in two ends of the linear magnetic steel magnetism isolating groove 7, and two semicircular linear magnetic steel magnetism isolating grooves 7 are formed in the side edge, close to the circle center of the rotor punching sheet, of the linear magnetic steel groove 10; the V-shaped magnetic steel groove 9 is provided with triangular grooves at two ends, and two rectangular magnetism isolating grooves 8 are arranged on the side edge of the V-shaped magnetic steel groove 9 close to one side of the circle center of the rotor punching sheet 1. The upper end of the tangential magnetizing steel groove 11 is provided with a rectangular magnetism isolating groove, and the lower end of the tangential magnetizing steel groove 11 is provided with a trapezoidal magnetism isolating groove.
And auxiliary grooves are arranged on the rotating surfaces of the rotor punching sheets close to the two ends of the linear magnetic steel magnetism isolating groove in each magnetic steel pole area.
And a fan-shaped lightening hole 5 is arranged on the rotor punching sheet close to the inner circle.
Example 3:
a permanent magnet synchronous motor hybrid rotor magnetic circuit structure includes: the rotor punching sheet 1 is internally provided with a tangential magnetizing permanent magnet 2 and a radial magnetizing permanent magnet; the radial magnetizing permanent magnet comprises a V-shaped permanent magnet 3 and a radial magnetizing linear permanent magnet 4. The V-shaped permanent magnet 3 and the radial magnetizing straight permanent magnet 4 are symmetrically distributed by taking the tangential magnetizing permanent magnet as a symmetry axis,
the tangential magnetizing permanent magnets 2 are arranged in the middle of each magnetic steel pole area, the magnetizing directions of all the tangential magnetizing permanent magnets 2 on the rotor punching sheet 1 are kept consistent, the magnetizing directions of two radial magnetizing linear permanent magnets symmetrically distributed on each magnetic steel pole area are opposite, and as shown in fig. 2, each permanent magnet structure is marked with a magnetic steel N, S pole.
The angle alpha of the magnetic steel arranged between the two V-shaped permanent magnets 4 is 80-100 degrees, preferably 93 degrees, and the angle beta of the magnetic steel arranged between the two V-shaped permanent magnets 4 is 26-34 degrees, preferably 30 degrees.
Each permanent magnet is provided with a corresponding magnetic steel groove and a corresponding magnetism isolating groove, and a rectangular groove 6 is particularly arranged between the V-shaped permanent magnet 3 and two near ends of the tangential magnetizing permanent magnet 2; triangular grooves are formed in two ends of the radial magnetizing linear permanent magnet 4; triangular grooves are formed in two ends of the V-shaped permanent magnet 3; the upper end of the radial magnetizing permanent magnet 2 is provided with a rectangular magnetism isolating groove, and the lower end is provided with a trapezoidal magnetism isolating groove.
And auxiliary grooves 12 are arranged on the rotating surfaces of the rotor, which are close to the two ends of the radial magnetizing linear permanent magnet 4, in each magnetic steel pole area and are used for weakening cogging torque and counter potential higher harmonics.
The fan-shaped weight-removing holes 5 are arranged at the positions close to the inner circle of the rotor, so that the weight of the rotor is reduced, and the power density is improved.
The embodiments of the present invention are merely illustrative for explaining the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical concepts of the present invention be covered by the claims of the present invention.
Claims (10)
1. A mixed rotor magnetic circuit structure of a permanent magnet synchronous motor comprises rotor punching sheets, wherein a plurality of rotor punching sheets are laminated and pressed to form a rotor core; the rotor punching sheet comprises a plurality of magnetic steel pole regions; the method is characterized in that: each magnetic steel pole area comprises a tangential magnetizing part and a radial magnetizing part;
the tangential magnetizing part is configured into a permanent magnet with the magnetizing direction perpendicular to the radial direction of the rotor punching sheet;
the radial magnetizing part is configured into a permanent magnet which is magnetized along the radial direction of the rotor punching sheet;
the radial magnetizing part comprises a first radial magnetizing part and a second radial magnetizing part; the first radial magnetizing pieces are magnetized along the radial direction of the rotor punching sheet, and the two first radial magnetizing pieces are symmetrically arranged by taking the first radial magnetizing pieces as a symmetry axis; the two second radial magnetizing pieces are also symmetrically arranged by taking the first radial magnetizing piece as a symmetry axis, and the two second radial magnetizing pieces are arranged in a V shape; a magnetic steel angle with an angle end point facing the circle center of the rotor punching sheet is formed between the two second radial magnetizing pieces;
the radial magnetizing parts are arranged by taking the tangential magnetizing parts as a symmetry axis, and the first radial magnetizing part is positioned between the second tangential magnetizing part and the tangential magnetizing part;
the magnetizing directions of the two first radial magnetizing pieces are opposite, and the magnetizing directions of the two second radial magnetizing pieces face the same direction.
2. The hybrid rotor magnetic circuit structure of a permanent magnet synchronous motor according to claim 1, wherein: the magnetic steel angle formed between the two second tangential magnetizing parts comprises a first magnetic steel angle and a second magnetic steel angle;
the first magnetic steel angle is configured as an included angle formed between the upward surfaces of the two second radial magnetizing parts;
and the second magnetic steel angle is configured to be an included angle between the two second radial magnetizing parts along the farthest radial vertex angles of the rotor punching sheets.
3. The hybrid rotor magnetic circuit structure of a permanent magnet synchronous motor according to claim 2, wherein: the angle of the first magnetic steel is 80-100 degrees.
4. The hybrid rotor magnetic circuit structure of a permanent magnet synchronous motor according to claim 2, wherein: the angle of the second magnetic steel ranges from 26 degrees to 34 degrees.
5. The hybrid rotor magnetic circuit structure of a permanent magnet synchronous motor according to claim 1, wherein: the rotor punching sheet comprises a magnetic steel groove in which the tangential magnetizing part and the radial magnetizing part are embedded and mounted.
6. The hybrid rotor magnetic circuit structure of PMSM according to claim 5, characterized in that: and each magnetic steel groove is provided with a corresponding magnetism isolating groove.
7. The hybrid rotor magnetic circuit structure of PMSM according to claim 6, characterized in that: a rectangular slot is disposed between the second radially magnetized member and the two proximal ends of the tangentially magnetized member.
8. The hybrid rotor magnetic circuit structure of PMSM according to claim 6, characterized in that: and the two ends of the magnetic steel groove of the tangential magnetizing part are respectively provided with the magnetism isolating grooves.
9. The hybrid rotor magnetic circuit structure of PMSM according to claim 6, characterized in that: and the two ends of the magnetic steel groove of the second radial magnetizing part are respectively provided with the magnetism isolating grooves.
10. The hybrid rotor magnetic circuit structure of a permanent magnet synchronous motor according to claim 1, wherein: and auxiliary grooves are formed in the rotating surfaces of the rotor punching sheets at two ends close to the radial magnetizing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022923175.3U CN214069687U (en) | 2020-12-09 | 2020-12-09 | Mixed rotor magnetic circuit structure of permanent magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022923175.3U CN214069687U (en) | 2020-12-09 | 2020-12-09 | Mixed rotor magnetic circuit structure of permanent magnet synchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN214069687U true CN214069687U (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022923175.3U Active CN214069687U (en) | 2020-12-09 | 2020-12-09 | Mixed rotor magnetic circuit structure of permanent magnet synchronous motor |
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| CN (1) | CN214069687U (en) |
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- 2020-12-09 CN CN202022923175.3U patent/CN214069687U/en active Active
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