CN210577995U - Rotor structure of permanent magnet synchronous motor - Google Patents
Rotor structure of permanent magnet synchronous motor Download PDFInfo
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- CN210577995U CN210577995U CN201921909647.0U CN201921909647U CN210577995U CN 210577995 U CN210577995 U CN 210577995U CN 201921909647 U CN201921909647 U CN 201921909647U CN 210577995 U CN210577995 U CN 210577995U
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 75
- 239000010959 steel Substances 0.000 claims abstract description 75
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 8
- 238000004080 punching Methods 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims 1
- 230000005389 magnetism Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 neodymium iron boron rare earth Chemical class 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a permanent magnet synchronous motor rotor structure, including rotor and along a plurality of magnetic pole structures of rotor circumference evenly placed in, magnetic pole structure comprises three magnet steels of the same polarity, three magnet steels are two magnet steels one and a magnet steel two respectively, two magnet steels are symmetrically arranged and are in the shape of V, magnet steel two is in the shape of a straight line, the position of rotor corresponding to magnet steel one is provided with a magnet steel slot one, the position corresponding to magnet steel two is provided with a magnet steel slot two, the both ends position of magnet steel slot one is provided with an air magnetism separating slot one communicated with it, the both ends position of magnet steel slot two is provided with an air magnetism separating slot two communicated with it; the first magnetic steel and the second magnetic steel are both ferrite magnetic steels. The utility model discloses an adopt the mode that reasonable rotor magnetic pole structural design and ferrite magnet steel combined together, realized the motor performance equivalent with the tombarthite permanent magnetism, solved the too high problem of back electromotive force, increase reluctance torque accounts for than, improves the torque density and the work efficiency of motor, has reduced the motor drive system cost.
Description
Technical Field
The utility model belongs to the technical field of the motor, concretely relates to PMSM rotor structure.
Background
At present, a permanent magnet motor for an electric automobile is developing towards low cost and high speed, and the conventional neodymium iron boron rare earth permanent magnet material has the problems of high cost and overhigh back electromotive force at high rotating speed, and has adverse effects on the control and protection of a driving system.
Disclosure of Invention
The utility model aims to solve the technical problem that not enough to above-mentioned prior art provides a PMSM rotor structure, this PMSM rotor structure has realized the motor performance equivalent with the tombarthite permanent magnetism through the mode that adopts reasonable rotor magnetic pole structural design and ferrite magnet steel to combine together, and has further solved the too high problem of back electromotive force, and increase reluctance torque accounts for than, improves the torque density and the work efficiency of motor, has reduced the motor drive system cost.
In order to realize the technical purpose, the utility model discloses the technical scheme who takes does:
a rotor structure of a permanent magnet synchronous motor comprises a rotor and a plurality of magnetic pole structures which are uniformly arranged in the rotor along the circumferential direction of the rotor, wherein each magnetic pole structure comprises three pieces of magnetic steel with the same polarity, the three pieces of magnetic steel are respectively a first piece of magnetic steel and a second piece of magnetic steel, the first piece of magnetic steel is symmetrically arranged in a V shape, the second piece of magnetic steel is in a straight shape and is positioned between the first piece of magnetic steel and the outer edge of the rotor, the polarities of the adjacent magnetic pole structures are opposite, a first magnetic steel groove is formed in the position, corresponding to the first piece of magnetic steel, on the rotor, and a second magnetic steel groove is formed in the position, corresponding to the second piece of magnetic steel, two end positions of the first magnetic steel groove are provided with a first air magnetic isolation groove communicated with the first magnetic steel groove, two end positions of the second magnetic steel groove are provided with a second air magnetic isolation groove communicated with the second magnetic isolation groove, a, the weight-removing hole is positioned between the rotating shaft in the middle of the rotor and the magnetic pole structure; the first magnetic steel and the second magnetic steel are both ferrite magnetic steels.
As the utility model discloses further modified technical scheme, the rotor includes rotor core and installs the pivot at rotor core middle part, rotor core is folded by a plurality of rotor punching and is pressed and form, evenly distributed has two magnet steel groove, two magnet steel groove and the weight removal hole of symmetrical arrangement and be the V font on the circumferencial direction of rotor punching, the pivot hole has been seted up towards the middle part of piece to the rotor.
As a further improved technical scheme of the utility model, the pivot passes through interference or key fit with the pivot hole at rotor core middle part.
The utility model has the advantages that:
the utility model discloses a V-arrangement + a shape magnetic pole structure cooperatees with ferrite material's magnet steel, makes motor reluctance torque account for the ratio and increases, and the back electromotive force is low, practice thrift the cost, is of value to the motor weak magnetic speed extension, can realize the motor performance equivalent with the tombarthite permanent magnetism, realizes motor high performance operation, and simple process easily realizes.
Drawings
Fig. 1 is a schematic structural view of the rotor of the present invention.
Detailed Description
The following further description of the embodiments of the present invention is made with reference to fig. 1:
a rotor structure of a permanent magnet synchronous motor is shown in figure 1 and comprises a rotor 1 and a plurality of magnetic pole structures which are uniformly arranged in the rotor 1 along the circumferential direction of the rotor 1, wherein each magnetic pole structure comprises three pieces of magnetic steel with the same polarity, the three pieces of magnetic steel are respectively a first piece of magnetic steel 3 and a second piece of magnetic steel 4, the first piece of magnetic steel 3 is symmetrically arranged in a V shape, the second piece of magnetic steel 4 is in a straight shape and is positioned between the first piece of magnetic steel 3 and the outer edge of the rotor 1, the polarities of the adjacent magnetic pole structures are opposite, a first piece of magnetic steel slot is arranged at the position corresponding to the first piece of magnetic steel 3 on the rotor 1, a second piece of magnetic steel slot is arranged at the position corresponding to the second piece of magnetic steel 4, first air magnetism isolating slots 5 communicated with the first piece of magnetic steel slots are arranged at the two ends of the second piece of magnetic steel slots, second air magnetism isolating slots 6 are communicated with the second magnetism isolating, a plurality of weight removing holes 2 are uniformly distributed in the circumferential direction of the rotor 1, and the weight removing holes 2 are positioned between a rotating shaft 8 in the middle of the rotor 1 and a magnetic pole structure; the first magnetic steel 3 and the second magnetic steel 4 are both ferrite magnetic steels. The ferrite has the characteristics of good stability, low material cost and low back electromotive force.
In this embodiment, rotor 1 includes rotor core and installs the pivot 8 at rotor core middle part, rotor core is folded by a plurality of silicon steel rotor punching and is pressed and form, evenly distributed has two magnet steel slots two, magnet steel slot two and the heavy hole 2 that goes that symmetrical arrangement and be the V font on the circumferencial direction of rotor punching, the pivot hole has been seted up at the middle part of rotor punching.
In this embodiment, the rotating shaft 8 is in interference fit or key fit with the rotating shaft hole in the middle of the rotor core, so as to form a rotor.
The weight-reducing hole 2 of the embodiment can reduce the weight of the rotor core without affecting the performance of the motor.
The three pieces of ferrite magnetic steel form a V + type rotor magnetic pole structure, the magnetic pole structure can increase the ratio of reluctance torque in torque, reduce the use amount of permanent magnet materials, and reduce the use amount of rare earth materials and the cost of the motor by using the ferrite magnetic steel.
The air magnetic isolation grooves I5 and the air magnetic isolation grooves II 6 can prevent a magnetic field from passing through, reduce magnetic leakage, optimize air gap flux density waveform and improve the mechanical strength of the magnetic isolation bridge 7.
The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.
Claims (3)
1. A rotor structure of a permanent magnet synchronous motor is characterized by comprising a rotor and a plurality of magnetic pole structures which are uniformly arranged in the rotor along the circumferential direction of the rotor, wherein each magnetic pole structure comprises three pieces of magnetic steel with the same polarity, the three pieces of magnetic steel are respectively a first piece of magnetic steel and a second piece of magnetic steel, the first piece of magnetic steel is symmetrically arranged in a V shape, the second piece of magnetic steel is in a straight shape and is positioned between the first piece of magnetic steel and the outer edge of the rotor, the polarities of the adjacent magnetic pole structures are opposite, a first piece of magnetic steel groove is arranged at the position on the rotor corresponding to the first piece of magnetic steel, a second piece of magnetic steel groove is arranged at the position corresponding to the second piece of magnetic steel, first air magnetic isolation grooves communicated with the first piece of magnetic steel groove are arranged at the two ends of the first piece of magnetic steel groove, second air magnetic isolation grooves communicated with the second piece of magnetic steel are arranged at the two ends of the second piece of magnetic, the weight-removing hole is positioned between the rotating shaft in the middle of the rotor and the magnetic pole structure; the first magnetic steel and the second magnetic steel are both ferrite magnetic steels.
2. The rotor structure of the permanent magnet synchronous motor according to claim 1, wherein the rotor comprises a rotor core and a rotating shaft arranged in the middle of the rotor core, the rotor core is formed by laminating a plurality of rotor punching sheets, two magnetic steel slots II and a weight removing hole which are symmetrically arranged and in a V shape are uniformly distributed in the circumferential direction of the rotor punching sheets, and the middle of each rotor punching sheet is provided with a rotating shaft hole.
3. The rotor structure of the permanent magnet synchronous motor according to claim 2, wherein the rotating shaft is in interference fit or key fit with the rotating shaft hole in the middle of the rotor core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921909647.0U CN210577995U (en) | 2019-11-07 | 2019-11-07 | Rotor structure of permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921909647.0U CN210577995U (en) | 2019-11-07 | 2019-11-07 | Rotor structure of permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210577995U true CN210577995U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921909647.0U Active CN210577995U (en) | 2019-11-07 | 2019-11-07 | Rotor structure of permanent magnet synchronous motor |
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| CN (1) | CN210577995U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022121276A1 (en) * | 2020-12-09 | 2022-06-16 | 上海特波电机有限公司 | V-shaped asymmetric segmented permanent magnet synchronous electric motor rotor |
-
2019
- 2019-11-07 CN CN201921909647.0U patent/CN210577995U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022121276A1 (en) * | 2020-12-09 | 2022-06-16 | 上海特波电机有限公司 | V-shaped asymmetric segmented permanent magnet synchronous electric motor rotor |
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