CN113675971A - Permanent magnet motor rotor structure with high salient pole ratio of mixed material - Google Patents
Permanent magnet motor rotor structure with high salient pole ratio of mixed material Download PDFInfo
- Publication number
- CN113675971A CN113675971A CN202010403570.0A CN202010403570A CN113675971A CN 113675971 A CN113675971 A CN 113675971A CN 202010403570 A CN202010403570 A CN 202010403570A CN 113675971 A CN113675971 A CN 113675971A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- axis
- rotor structure
- electric machine
- magnetic conduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 32
- 229910001313 Cobalt-iron alloy Inorganic materials 0.000 claims description 4
- 230000035699 permeability Effects 0.000 abstract description 10
- 230000006872 improvement Effects 0.000 description 9
- 230000004907 flux Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
Abstract
The invention discloses a mixed material high salient pole ratio permanent magnet motor rotor structure which comprises a mixed material rotor, wherein a plurality of pairs of permanent magnet grooves are formed in the mixed material rotor, permanent magnets are arranged in the permanent magnet grooves, the permanent magnets in two adjacent pairs of permanent magnet grooves are in an axisymmetric structure, the symmetry axis is set as a q axis, a magnetic conduction hole is formed between the two adjacent pairs of permanent magnet grooves and on the q axis, a high-magnetic-conductivity body is arranged in the magnetic conduction hole, and the high-magnetic-conductivity body is symmetrical about the q axis. According to the invention, the magnetic conduction holes are added at the corresponding positions of the q axis, and the high-permeability bodies with high permeability are filled in the magnetic conduction holes, so that the saturation degree of a q-axis magnetic circuit is relieved, the permeability is improved, the salient pole ratio of the motor is improved to ensure larger torque output, and the torque density of the built-in permanent magnet motor is improved to a certain extent.
Description
Technical Field
The invention relates to a permanent magnet motor, in particular to a permanent magnet motor rotor structure made of mixed materials and having a high salient pole ratio.
Background
In recent years, with the rapid development of new energy automobiles, the demand for the indexes of driving motors on vehicles is higher and higher, a permanent magnet motor with high torque density becomes a hot research object, and for an internal permanent magnet motor, the torque density of the motor is determined by the rotor structure of the motor. Because the output torque of the interior permanent magnet motor is closely related to the rotor salient pole ratio, how to increase the rotor salient pole ratio to improve the output torque of the motor by changing the rotor structure becomes a key point of the rotor structure design. The traditional method for improving the torque density of the motor is to replace a high-performance rotor punching sheet, but the cost of the motor is overhigh due to the method.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a permanent magnet motor rotor structure with a mixed material high salient pole ratio, which increases the salient pole ratio of a motor by increasing the q-axis magnetic conductivity and the q-axis inductance so as to improve the torque density of the motor.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a permanent-magnet machine rotor structure of mixed material high salient pole ratio, includes the mixed material rotor, be equipped with many pairs of permanent magnet grooves on the mixed material rotor, each permanent magnet inslot is equipped with the permanent magnet, and the permanent magnet in two adjacent pairs of permanent magnet grooves is the axisymmetric structure, and the symmetry axis establishes to q axle, is equipped with the magnetic conduction hole between two adjacent pairs of permanent magnet grooves and on the q axle, be equipped with high magnetic conductivity body in the magnetic conduction hole, high magnetic conductivity body is symmetrical about q.
As a further improvement of the above technical solution, the flux holes are symmetrical with respect to q.
As a further improvement of the above technical solution, the high magnetic permeability body is a cobalt iron alloy body.
As a further improvement of the technical scheme, the magnetic conduction holes are round holes.
As a further improvement of the technical scheme, the magnetic conduction hole is a square hole.
As a further improvement of the technical scheme, each pair of permanent magnet slots is of an axisymmetric structure, and the symmetry axis is set as a d axis.
As a further improvement of the technical scheme, the permanent magnets in each pair of permanent magnet slots are symmetrical about the d axis.
As a further improvement of the technical scheme, the two permanent magnet slots of each pair are distributed in a V shape relative to the d axis.
As a further improvement of the technical scheme, two adjacent pairs of permanent magnet slots are distributed in an inverted V shape.
As a further improvement of the technical scheme, each pair of permanent magnet grooves is uniformly distributed along the circumferential direction of the mixed material rotor.
Compared with the prior art, the invention has the advantages that:
according to the mixed material permanent magnet motor rotor structure with the high salient pole ratio, disclosed by the invention, through analysis, q-axis inductance is greatly influenced by magnetic conductivity, so that the influence on torque is large, the magnetic conductivity hole is additionally arranged at the corresponding position of the q-axis, and the high-magnetic conductivity body with high magnetic conductivity is filled in the magnetic conductivity hole, so that the saturation degree of a q-axis magnetic circuit is relieved, the magnetic conductivity is improved, the salient pole ratio of the motor is improved to ensure larger torque output, and the torque density of the built-in permanent magnet motor is improved to a certain extent.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is a graph comparing the output torque of the rotor structure of the permanent magnet motor in embodiment 1 of the present invention with that of the rotor structure of the permanent magnet motor in the prior art.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
The reference numerals in the figures denote:
1. a mixed material rotor; 2. a permanent magnet slot; 3. a permanent magnet; 4. a magnetic conduction hole; 5. a high magnetic permeability body.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Example 1
As shown in fig. 1 and fig. 2, the rotor structure of the hybrid material high salient pole ratio permanent magnet motor of the embodiment includes a hybrid material rotor 1, a plurality of pairs of permanent magnet slots 2 are provided on the hybrid material rotor 1, a permanent magnet 3 is provided in each permanent magnet slot 2, the permanent magnets 3 in two adjacent pairs of permanent magnet slots 2 are axisymmetric, the symmetry axis is set as a q-axis, a flux hole 4 is provided between two adjacent pairs of permanent magnet slots 2 and on the q-axis, a high permeability body 5 is provided in the flux hole 4, and the high permeability body 5 is symmetric with respect to q.
The magnetic field emitted by the permanent magnet 3 enters the stator through the air gap through the rotor and returns to the permanent magnet 3 of the rotor through the air gap to form a complete magnetic circuit, and electromechanical energy conversion is completed in the air gap. With the increasing demand of torque density, the output of the motor is limited by the cost and the volume of the motor, so that the output of the motor reaches the bottleneck. Through the analysis, q axle inductance receives the magnetic conductivity influence great and then to the torque influence great, through add magnetic conduction hole 4 in q axle corresponding position to pack the high magnetic conductivity body 5 that magnetic conductivity is high in the magnetic conduction hole 4, alleviate q axle magnetic circuit saturation degree, promote magnetic conductivity, improve the salient pole ratio of motor in order to guarantee bigger torque output, improved built-in permanent magnet machine's torque density to a certain extent.
In the present embodiment, the high magnetic permeability body 5 is preferably a cobalt iron alloy body. In the present embodiment, the cobalt-iron alloy body is taken as an example, and the present invention is not limited thereto, and other high magnetic permeability materials may be used.
In this embodiment, the magnetic conductive holes 4 are symmetrical with respect to q, and the magnetic conductive holes 4 are circular holes to facilitate the installation of the high magnetic permeability body 5, and accordingly, the high magnetic permeability body 5 is a cylinder.
In this embodiment, each pair of permanent magnet slots 2 is an axisymmetric structure, and the symmetry axis is set as a d-axis. Similarly, the permanent magnets 3 in each pair of permanent magnet slots 2 are symmetrical about the d-axis.
In the present embodiment, the two permanent magnet slots 2 of each pair are distributed in a V-shape about the d-axis. Two adjacent pairs of permanent magnet grooves 2 are distributed in an inverted V shape.
In the present embodiment, each pair of permanent magnet slots 2 is uniformly distributed along the circumferential direction of the mixed material rotor 1.
Fig. 2 is a comparison graph of output torque of the permanent magnet motor rotor structure of the present invention and the permanent magnet motor rotor structure of the prior art, and after the new structure of the present invention is adopted, the output torque is improved by 3%, and the torque density of the motor can be improved under certain conditions.
Example 2
As shown in fig. 3, the rotor structure of the hybrid-material high-saliency permanent magnet motor of the present embodiment differs from that of embodiment 1 only in that:
in this embodiment, the magnetic conduction hole 4 is a square hole, preferably a rectangular hole, and the corresponding high magnetic conductivity body 5 is configured as a square body.
The rest of the process was the same as example 1 and will not be described herein.
It should be noted that the flux holes 4 of the above embodiments 1 and 2 are respectively defined as a circle and a square, but the present invention is not limited thereto, and in other embodiments, the flux holes 4 may also be configured in other shapes, such as a triangle or a trapezoid.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. The utility model provides a permanent-magnet machine rotor structure of combined material high salient pole ratio, includes combined material rotor (1), its characterized in that: the rotor is characterized in that a plurality of pairs of permanent magnet grooves (2) are formed in the mixed material rotor (1), permanent magnets (3) are arranged in each permanent magnet groove (2), the permanent magnets (3) in the two adjacent pairs of permanent magnet grooves (2) are of an axisymmetric structure, the symmetry axis is set to be a q axis, a magnetic conduction hole (4) is formed between the two adjacent pairs of permanent magnet grooves (2) and on the q axis, a high-permeability body (5) is arranged in the magnetic conduction hole (4), and the high-permeability body (5) is symmetrical about q.
2. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of claim 1, wherein: the magnetic conduction holes (4) are symmetrical about q.
3. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of claim 1, wherein: the high-permeability body (5) is a cobalt-iron alloy body.
4. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of any of claims 1 to 3, characterized in that: the magnetic conduction hole (4) is a round hole.
5. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of any of claims 1 to 3, characterized in that: the magnetic conduction hole (4) is a square hole.
6. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of any of claims 1 to 3, characterized in that: each pair of permanent magnet slots (2) is of an axisymmetric structure, and the symmetry axis is set as a d axis.
7. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of claim 6, wherein: the permanent magnets (3) in each pair of permanent magnet slots (2) are symmetrical about the d-axis.
8. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of claim 6, wherein: the two permanent magnet slots (2) of each pair are distributed in a V shape relative to the d axis.
9. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of claim 8, wherein: two adjacent pairs of permanent magnet grooves (2) are distributed in an inverted V shape.
10. The hybrid material high saliency ratio permanent magnet electric machine rotor structure of any of claims 1 to 3, characterized in that: each pair of permanent magnet slots (2) is uniformly distributed along the circumferential direction of the mixed material rotor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010403570.0A CN113675971A (en) | 2020-05-13 | 2020-05-13 | Permanent magnet motor rotor structure with high salient pole ratio of mixed material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010403570.0A CN113675971A (en) | 2020-05-13 | 2020-05-13 | Permanent magnet motor rotor structure with high salient pole ratio of mixed material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113675971A true CN113675971A (en) | 2021-11-19 |
Family
ID=78536987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010403570.0A Pending CN113675971A (en) | 2020-05-13 | 2020-05-13 | Permanent magnet motor rotor structure with high salient pole ratio of mixed material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113675971A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1128522A1 (en) * | 2000-02-25 | 2001-08-29 | Nissan Motor Co., Ltd. | Permanent magnet rotor for synchronous motor |
| CN102420475A (en) * | 2010-09-27 | 2012-04-18 | 天津市松正电动科技有限公司 | Permanent magnet synchronous motor |
| US20130015727A1 (en) * | 2011-07-12 | 2013-01-17 | Tomotaka Iki | Rotor for reluctance motor |
| US20130193783A1 (en) * | 2012-02-01 | 2013-08-01 | Suzuki Motor Corporation | Electric rotating machine |
| CN203166647U (en) * | 2012-06-22 | 2013-08-28 | 株式会社日立产机系统 | Electric rotating machine |
| CN104638864A (en) * | 2015-02-16 | 2015-05-20 | 武汉华大新型电机科技股份有限公司 | Permanent magnet motor and method for accelerating rotating speed of permanent magnet motor |
| CN107565714A (en) * | 2017-10-10 | 2018-01-09 | 湘电莱特电气有限公司 | A kind of high salient pole than permanent magnet machine rotor and motor |
| CN108471211A (en) * | 2018-04-13 | 2018-08-31 | 哈尔滨理工大学 | A kind of rotor structure improving permanent magnet synchronous motor weak magnetism speed expansion performance |
| CN110994843A (en) * | 2019-12-26 | 2020-04-10 | 上海应用技术大学 | Rotor structure of permanent magnet synchronous motor |
-
2020
- 2020-05-13 CN CN202010403570.0A patent/CN113675971A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1128522A1 (en) * | 2000-02-25 | 2001-08-29 | Nissan Motor Co., Ltd. | Permanent magnet rotor for synchronous motor |
| CN102420475A (en) * | 2010-09-27 | 2012-04-18 | 天津市松正电动科技有限公司 | Permanent magnet synchronous motor |
| US20130015727A1 (en) * | 2011-07-12 | 2013-01-17 | Tomotaka Iki | Rotor for reluctance motor |
| US20130193783A1 (en) * | 2012-02-01 | 2013-08-01 | Suzuki Motor Corporation | Electric rotating machine |
| CN203166647U (en) * | 2012-06-22 | 2013-08-28 | 株式会社日立产机系统 | Electric rotating machine |
| CN104638864A (en) * | 2015-02-16 | 2015-05-20 | 武汉华大新型电机科技股份有限公司 | Permanent magnet motor and method for accelerating rotating speed of permanent magnet motor |
| CN107565714A (en) * | 2017-10-10 | 2018-01-09 | 湘电莱特电气有限公司 | A kind of high salient pole than permanent magnet machine rotor and motor |
| CN108471211A (en) * | 2018-04-13 | 2018-08-31 | 哈尔滨理工大学 | A kind of rotor structure improving permanent magnet synchronous motor weak magnetism speed expansion performance |
| CN110994843A (en) * | 2019-12-26 | 2020-04-10 | 上海应用技术大学 | Rotor structure of permanent magnet synchronous motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100386946C (en) | Permanent magnet motor rotor capable of automatic weaking magnet following rotation speed | |
| CN202260721U (en) | Internal rotor structure of permanent magnet motor | |
| CN101325349A (en) | Permanent magnetism type motor of wide speed-adjusting magnetic flux memory type stator | |
| CN108777518A (en) | A kind of rotor structure of the few rare-earth permanent-magnet electric machine of asymmetric mixing | |
| CN105914984A (en) | Various magnetic flux-strong magnetic type permanent magnet synchronous motor | |
| CN205407445U (en) | Novel permanent -magnet machine rotor that mixes magnetic circuit | |
| CN102593974A (en) | Hybrid excitation switched flux motor | |
| CN202276210U (en) | Rotor structure of wide speed range permanent magnet motor | |
| CN105305685A (en) | Permanent magnet synchronous direct-drive motor | |
| CN107733112A (en) | A kind of ultrahigh speed permanent-magnetic synchronous motor rotor structure | |
| CN205509692U (en) | Changeable adjustable magnetism PMSM rotor of quadrature axis inductance | |
| CN113675971A (en) | Permanent magnet motor rotor structure with high salient pole ratio of mixed material | |
| CN203522360U (en) | Automotive permanent-magnet synchronous motor | |
| CN106787323A (en) | A kind of rotor of alternating-current permanent-magnet servo motor | |
| CN202872490U (en) | Electric automobile permanent magnet reluctance motor rotor magnetism gathering structure | |
| CN206992831U (en) | Hybrid permanent magnet type synchronous motor rotor structure | |
| CN206481197U (en) | Anti- salient pole permanent magnet reluctance motor | |
| CN206595871U (en) | A kind of magnetic structure of permanent-magnet synchronous brushless electric machine | |
| CN202424450U (en) | Hybrid excitation magnetic pole structure | |
| CN103647422B (en) | A kind of magnetic circuit tandem type motor using hybrid permanent magnet material | |
| CN209170078U (en) | Flat type permanent-magnet servo motor built in a kind of low inertia | |
| CN102820715A (en) | Method for reducing positioning torque of magnetic-flux switching permanent magnet motor | |
| CN112671135A (en) | Method for optimizing four-section Halbach array surface-mounted permanent magnet motor | |
| CN202586676U (en) | Rotor used for hybrid stepping motor | |
| CN201656605U (en) | Permanent magnet traction motor with broader speed-enlarging range |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211119 |