CN215733728U - Modularized permanent magnet motor rotor punching sheet and motor - Google Patents
Modularized permanent magnet motor rotor punching sheet and motor Download PDFInfo
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- CN215733728U CN215733728U CN202121483461.0U CN202121483461U CN215733728U CN 215733728 U CN215733728 U CN 215733728U CN 202121483461 U CN202121483461 U CN 202121483461U CN 215733728 U CN215733728 U CN 215733728U
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Abstract
The invention discloses a modularized permanent magnet motor rotor punching sheet and a motor, which comprise a rotor punching sheet body, wherein permanent magnet groove groups distributed in a circumferential array mode are arranged on the rotor punching sheet body, and the modularized permanent magnet motor rotor punching sheet is characterized in that: the motor also comprises a plurality of pairs of limiting grooves and magnetic bridges of various specifications matched with the limiting grooves, wherein the limiting grooves are uniformly distributed on each permanent magnet groove of the permanent magnet groove group according to a certain interval, and the number and the position of the magnetic bridges inserted into the limiting grooves and the specification of the magnetic bridges are selected according to the performance required by the motor. The invention adopts the structural form of limit grooves distributed at uniform intervals and magnetic bridges matched with the limit grooves, and magnetic bridges (comprising magnetic bridges made of magnetic conductive materials and magnetic bridges made of non-magnetic conductive materials) with various specifications are arranged; through the selection of the quantity, the position and the material of the magnetic bridges, the rotor punching sheet can be simultaneously suitable for the performance requirements of different motors, the universality of the rotor punching sheet is greatly improved, the research and development and the production period of the punching sheet are reduced, and the material management and control, the purchasing cost and the process complexity are also improved.
Description
Technical Field
The invention relates to the technical field of driving motors, in particular to a modularized permanent magnet motor rotor punching sheet.
Background
In the prior art, an asymmetric magnetic pole is generally realized by offsetting a certain angle of the magnetic pole or forming an asymmetric small hole on a rotor, and a rotor oblique pole is realized by positive and negative overlapping of the same type of punching sheet. For example, in the case of a Bolt Motor in the article "Electric Motor Design of General Motors' Chevrolet Bolt Electric Vehicle", the asymmetry of the rotor poles is realized by unequal included angles of magnetic poles and asymmetric small holes; the positive and negative overlapping is realized by a key slot scheme in 'a rotor punching sheet for realizing rotor segmented pole staggering based on a single die' of CN 208955765U patent.
The general rotor punching sheet is designed specifically according to the performance of the motor, and can not meet different performance requirements and noise standards. The existing rotor punching sheet has insufficient universality and cannot be simultaneously suitable for different performance requirements, so that the research and development and production period of the punching sheet are prolonged, and the material management and control, purchase cost and process complexity are increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a modularized permanent magnet motor rotor punching sheet with strong universality and a motor.
The technical scheme adopted by the invention is as follows: the utility model provides a modularization permanent-magnet machine rotor punching, includes the rotor punching body, is equipped with the permanent magnet groove group that circumference array laid on the rotor punching body, its characterized in that: the motor also comprises a plurality of pairs of limiting grooves and magnetic bridges of various specifications matched with the limiting grooves, wherein the limiting grooves are uniformly distributed on each permanent magnet groove of the permanent magnet groove group according to a certain interval, and the number and the position of the magnetic bridges inserted into the limiting grooves and the specification of the magnetic bridges are selected according to the performance required by the motor.
According to the technical scheme, the permanent magnet slot group comprises a first permanent magnet slot arranged on the outermost side of the rotor punching sheet body, second permanent magnet slots positioned on two sides of the central line of the magnetic pole and a third permanent magnet slot positioned on the innermost side of the rotor punching sheet body.
According to the technical scheme, the limit grooves are uniformly distributed on the first permanent magnet groove, the second permanent magnet groove and the third permanent magnet groove at intervals of L respectively1、L2、L3The number of the limiting groove pairs is N respectively1、2N2、N3(ii) a And according to the required motor performance, inserting the magnetic bridge corresponding to the required model into the corresponding limit groove.
According to the technical scheme, L is1、L2、L3Has a value range of 4-20 mm, L1、L2、L3According to the required performance of the motor.
According to the technical scheme, the thickness range of the magnetic bridge is 1-5 mm.
According to the technical scheme, the magnetic bridges are of two types, one type is magnetic bridges made of magnetic conduction materials, and the other type is magnetic bridges made of non-magnetic conduction materials.
According to the technical scheme, the magnetic bridge is not inserted into the limiting groove of the permanent magnet motor, and the salient pole rate of the rotor is improved.
According to the technical scheme, the permanent magnet motor is characterized in that N1、N2、N3And the number of the permanent magnet slots is odd, and a magnetic bridge is inserted into the limiting slot among the first permanent magnet slot, the two second permanent magnet slots and the third permanent magnet slot.
According to the technical scheme, the magnetic bridge is made of magnetic conductive materials.
According to the technical scheme, the permanent magnet motor is characterized in that the non-magnetic-conductive material magnetic bridges are respectively inserted into the 1 st pair of limiting grooves of the first permanent magnet groove and the second permanent magnet groove of the N pole of the rotor, and the Nth pair of limiting grooves of the first permanent magnet groove and the second permanent magnet groove of the S pole of the rotor are respectively provided with the non-magnetic-conductive material magnetic bridges1、N2Non-magnetic material magnetic bridges are respectively inserted into the limiting grooves.
The beneficial effects obtained by the invention are as follows:
the invention adopts the structural form of limit grooves distributed at even intervals and magnetic bridges matched with the limit grooves, and magnetic bridges (comprising magnetic bridges made of magnetic materials and non-magnetic bridges made of magnetic materials) with multiple moving specifications are arranged; through the selection of the quantity, the position and the material of the magnetic bridges, the rotor punching sheet can be simultaneously suitable for the performance requirements of different motors, the universality of the rotor punching sheet is greatly improved, the research and development and the production period of the punching sheet are reduced, and the material management and control, the purchasing cost and the process complexity are also improved.
Drawings
Fig. 1 is a schematic structural diagram of a punching sheet according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a magnetic bridge according to an embodiment of the present invention;
FIG. 3 is a detail view of a punch sheet according to an embodiment of the present invention;
FIG. 4 shows a first arrangement of a magnetic bridge according to an embodiment of the present invention;
FIG. 5 is a second arrangement of a magnetic bridge according to an embodiment of the present invention;
FIG. 6 is a third arrangement of a magnetic bridge according to an embodiment of the present invention;
in the figure: 1. a rotor punching sheet body; 2. a permanent magnet slot group; 3. a limiting groove; 4. a magnetic bridge; 2-1, a first permanent magnet slot; 2-2, a second permanent magnet slot; 2-3, and a third permanent magnet slot.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 to 3, the invention provides a modularized permanent magnet motor rotor punching sheet, which comprises a rotor punching sheet body 1, permanent magnet groove groups 2 arranged in a circumferential array manner are arranged on the rotor punching sheet body, and the modularized permanent magnet motor rotor punching sheet also comprises a plurality of pairs of limiting grooves 3 and magnetic bridges 4 matched with the limiting grooves and having various types. The magnetic bridge is a strip-shaped object with the thickness of a, has various specifications, has consistent width and length, and only has difference in thickness and material; the thickness a of the magnetic bridge ranges from 1 mm to 5mm, and the magnetic bridge can be divided into a magnetic bridge made of a magnetic conductive material and a magnetic bridge made of a non-magnetic conductive material according to the difference of materials. The limiting grooves are uniformly distributed on the permanent magnet grooves of the permanent magnet groove group at certain intervals, and the number and the positions of the inserted magnetic bridges and the specifications of the inserted magnetic bridges are selected according to the performance required by the motor.
In some embodiments, the permanent magnet groove group comprises a first permanent magnet groove 2-1 arranged at the outermost side of the rotor punching sheet body, second permanent magnet grooves 2-2 positioned at two sides of a magnetic pole center line and permanent magnet grooves positioned at the two sides of the magnetic pole center lineAnd the third permanent magnet groove 2-3 at the innermost side of the rotor punching sheet body. N is a radical of1A spacing groove with an interval L1Uniformly distributed on the first permanent magnet slot, 2N1A spacing groove with an interval L2Evenly distributed on two second permanent magnet slots, N3A spacing groove with an interval L3Evenly distributed on the third permanent magnet slot. Magnetic bridge L1、L2、L3Has a value range of 4-20 mm, L1、L2、L3The three values may be equal to each other, with suitable values being selected according to the desired performance of the motor. Permanent magnets are inserted into the permanent magnet grooves (whether the permanent magnets are inserted into the first, second and third permanent magnet grooves can be selected according to the performance of the motor), and the motor with corresponding performance can be obtained according to the number, the position and the specification of the magnetic bridges inserted into the limiting grooves.
The invention also provides various permanent magnet motors adopting the rotor punching sheet in the embodiment, which are shown in figures 4-6.
The first is to insert permanent magnets in the permanent magnet slot groups but not insert magnetic bridges in the limiting slots. The d-axis inductance can be effectively reduced, but the q-axis inductance is not influenced, so that the salient pole rate of the rotor is obviously higher than that of the traditional rotor, and the design target of high performance and low cost can be realized; harmonic electromagnetic force can be effectively reduced, and adverse effects on the performance of the motor are not generated; the stress of the third magnetic bridge can be effectively reduced, so that the width of the third magnetic bridge can be reduced, the magnetic leakage of the magnetic steel is reduced, and the utilization rate of the magnetic steel is improved; the situation that material waste is caused by overlarge stress of one magnetic bridge and undersize stress of the other magnetic bridge is avoided; the width of the magnetic bridge can be reduced on the premise of keeping the performance unchanged, so that the magnetic flux leakage of the magnetic steel is reduced, and the utilization rate of the magnetic steel is improved.
Second, the logarithm of the limiting groove is N1、N2、N3Are odd numbers and are respectively arranged at the (N) th position of each permanent magnet slot1+1)/2、(N2+1)/2、(N3And (3) inserting magnetic bridges made of magnetic conducting materials into the +1)/2 pairs of limiting grooves, inserting permanent magnets into the first permanent magnet groove and the second permanent magnet groove, and not inserting permanent magnets into the third permanent magnet groove to obtain the motor, so that the D-axis magnetic flux can be increased, the high-rotation-speed performance of the motor is improved, and the rotation speed of the motor is increased.
Thirdly, inserting permanent magnets into the first permanent magnet groove and the second permanent magnet groove, and not inserting permanent magnets into the third permanent magnet groove; non-magnetic material magnetic bridges are respectively inserted into the 1 st pair of limiting grooves of the first and second permanent magnet grooves of the N pole of the rotor, and the Nth pair of limiting grooves of the first and second permanent magnet grooves of the S pole of the rotor1、N2The non-magnetic material magnetic bridges are respectively inserted into the limiting grooves, so that the obtained motor can realize the effect of magnetic pole deviation, and is favorable for increasing the torque of the motor and improving torque fluctuation and noise vibration.
The arrangement mode of the magnetic bridges is not limited to the embodiment, and corresponding rotor punching sheets can be selected according to the performance of the motor, whether the magnetic bridges, the magnetic bridges made of magnetic materials or the magnetic bridges made of non-magnetic materials are placed in any limiting groove of the rotor punching sheets is determined according to the performance of the motor.
The above examples are only for the purpose of illustrating the idea and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and the protection scope of the present invention is not limited to the above examples. Therefore, all equivalent changes and modifications made in accordance with the principles and concepts disclosed herein are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a modularization permanent-magnet machine rotor punching, includes the rotor punching body, is equipped with the permanent magnet groove group that circumference array laid on the rotor punching body, its characterized in that: the motor also comprises a plurality of pairs of limiting grooves and magnetic bridges of various specifications matched with the limiting grooves, wherein the limiting grooves are uniformly distributed on each permanent magnet groove of the permanent magnet groove group according to a certain interval, and the number and the position of the magnetic bridges inserted into the limiting grooves and the specification of the magnetic bridges are selected according to the performance required by the motor.
2. The modular permanent magnet motor rotor punching sheet according to claim 1, characterized in that: the permanent magnet slot group comprises a first permanent magnet slot arranged on the outermost side of the rotor punching sheet body, second permanent magnet slots positioned on two sides of the center line of the magnetic pole and a third permanent magnet slot positioned on the innermost side of the rotor punching sheet body.
3. The modular permanent magnet motor rotor punching sheet according to claim 2, characterized in that: the limit grooves are uniformly distributed on the first permanent magnet groove, the second permanent magnet groove and the third permanent magnet groove at intervals of L respectively1、L2、L3The number of the limiting groove pairs is N respectively1、2N2、N3(ii) a And according to the required motor performance, inserting the magnetic bridge corresponding to the required model into the corresponding limit groove.
4. The modular permanent magnet motor rotor punching sheet according to claim 3, characterized in that: said L1、L2、L3Has a value range of 4-20 mm, L1、L2、L3According to the required performance of the motor.
5. The modular permanent magnet motor rotor punching sheet according to any one of claims 1 to 4, characterized in that: the thickness range of the magnetic bridge is 1-5 mm.
6. The modular permanent magnet motor rotor punching sheet according to any one of claims 1 to 4, characterized in that: the magnetic bridge has two types, one is a magnetic bridge made of magnetic conduction materials, and the other is a magnetic bridge made of non-magnetic conduction materials.
7. A motor adopting the modularized permanent magnet motor rotor punching sheet according to any one of claims 1-6, characterized in that: and the limit grooves are not inserted with magnetic bridges and are used for improving the salient pole rate of the rotor.
8. A motor using the modular permanent magnet motor rotor punching sheet according to any one of claims 2-4, characterized in that: said N is1、N2、N3And the number of the permanent magnet slots is odd, and a magnetic bridge is inserted into the limiting slot among the first permanent magnet slot, the two second permanent magnet slots and the third permanent magnet slot.
9. The electric machine of claim 8, wherein: the magnetic bridge is made of magnetic conductive materials.
10. A motor using the modular permanent magnet motor rotor punching sheet according to any one of claims 2-4, characterized in that: the 1 st pair of limiting grooves of the first and second permanent magnet grooves of the N pole of the rotor are respectively inserted with a non-magnetic material magnetic bridge, and the Nth pair of limiting grooves of the first and second permanent magnet grooves of the S pole of the rotor are respectively inserted with a non-magnetic material magnetic bridge1、N2Non-magnetic material magnetic bridges are respectively inserted into the limiting grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121483461.0U CN215733728U (en) | 2021-07-01 | 2021-07-01 | Modularized permanent magnet motor rotor punching sheet and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121483461.0U CN215733728U (en) | 2021-07-01 | 2021-07-01 | Modularized permanent magnet motor rotor punching sheet and motor |
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| Publication Number | Publication Date |
|---|---|
| CN215733728U true CN215733728U (en) | 2022-02-01 |
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| CN202121483461.0U Active CN215733728U (en) | 2021-07-01 | 2021-07-01 | Modularized permanent magnet motor rotor punching sheet and motor |
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| CN (1) | CN215733728U (en) |
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2021
- 2021-07-01 CN CN202121483461.0U patent/CN215733728U/en active Active
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