CN106340982B - Rotor of permanent magnet synchronous motor and motor - Google Patents
Rotor of permanent magnet synchronous motor and motor Download PDFInfo
- Publication number
- CN106340982B CN106340982B CN201610910491.2A CN201610910491A CN106340982B CN 106340982 B CN106340982 B CN 106340982B CN 201610910491 A CN201610910491 A CN 201610910491A CN 106340982 B CN106340982 B CN 106340982B
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- China
- Prior art keywords
- rotor
- permanent magnet
- slit
- synchronous motor
- magnetic slot
- Prior art date
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 26
- 230000005389 magnetism Effects 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 101700004678 SLIT3 Proteins 0.000 description 18
- 102100027339 Slit homolog 3 protein Human genes 0.000 description 18
- 230000004907 flux Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 3
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor of a permanent magnet synchronous motor and the motor, belongs to the technical field of motors, and is designed for solving the problem that a large number of higher harmonic magnetic fields exist in the existing device. According to the rotor of the permanent magnet synchronous motor, a plurality of magnetic steel grooves are uniformly distributed on a rotor body along the circumferential direction, permanent magnets are inserted into the magnetic steel grooves, and the polarities of adjacent permanent magnets are opposite; a plurality of slits are arranged on the outer edge of the rotor body and correspond to the magnetic steel grooves, the slits are communicated to an air gap between the stator and the rotor, and the inner ends of the slits are positioned on the same circular arc line; or, a plurality of slits are arranged on the outer edge of the rotor body and corresponding to the magnetic steel grooves, the slits are communicated with the magnetic steel grooves, and the outer ends of the slits are positioned on the same arc line. The rotor of the permanent magnet synchronous motor and the motor solve the problem that a large amount of harmonic waves exist in an air gap between the inner side wall of the stator and the outer side wall of the rotor, reduce the electromagnetic noise of the motor, and realize high sine of the magnetic density of the air gap.
Description
Technical field
The present invention relates to the rotor of technical field of motors more particularly to a kind of permanent magnet synchronous motor and including the rotor
Motor.
Background technique
Exist in existing permanent magnet synchronous motor, in the air gap between stator inner sidewall and rotor lateral wall a large amount of high
Subharmonic magnetic field, so that stator, rotor and permanent magnet generate vibration, is formed to generate the electro-magnetic exciting force of each order
Serious electromagnetic noise；The higher hamonic wave magnetic field circulated in the stator and rotor can also increase eddy-current loss, easily send out permanent magnet
Heat reduces the anti-demagnetization capability of permanent magnet.
Summary of the invention
An object of the present invention is to provide a kind of air gaps solved between stator inner sidewall and rotor lateral wall
It is middle that there are the rotors of the permanent magnet synchronous motor of a large amount of harmonic problems.
It is another object of the present invention to propose a kind of motor that total noise of centrifuge is low.
For this purpose, on the one hand, the invention adopts the following technical scheme:
A kind of rotor of permanent magnet synchronous motor has been uniformly distributed circumferentially multiple magnetic slots, the magnetic on rotor body
Permanent magnet is inserted in steel tank, adjacent permanent magnet polarity is opposite；On the outer edge of the rotor body and correspond to the magnetic
Multiple slits are provided at steel tank, the slit is connected to the air gap between stator and rotor, and the inner end of the slit is located at same
On one circular arc line；Or, on the outer edge of the rotor body and correspond to the magnetic slot at be provided with multiple slits, institute
It states slit to be connected with the magnetic slot, the outer end of the slit is located on same circular arc line.
In particular, when the slit is connected to the air gap between stator and rotor, circular arc where the inner end of the slit
The center A of line is located on the extended line of the center O of the rotor body and the line at the permanent magnet center；The permanent magnet is
The permanent magnet in the magnetic slot that the slit corresponds to；The distance between A point and O point B5 are more than or equal to permanent magnetism body thickness B4
And less than or equal to 1.5 times of permanent magnetism body thickness B4；When the slit is connected with the magnetic slot, the outer end institute of the slit
It is overlapped at the center of circular arc line with the center of the rotor body.
In particular, the width B1 of the slit is less than or equal to 1/3 times of permanent magnetism body thickness B4.
In particular, the lateral wall for the rotor body being located between slit described in two adjacent groups is inwardly formed recess knot
Structure, the radially outward formation projective structure of the both side ends of the magnetic slot along the rotor body.
Further, the width B2 of the sunk structure is more than or equal to the spacing of the projective structure of the two neighboring magnetic slot
From 0.85 times of B3 and it is less than or equal to 1.1 times of distance B3 between the projective structure of the two neighboring magnetic slot.
In particular, the extending direction for extending perpendicularly to the magnetic slot corresponding to it of the slit.
In particular, form positioning region at the both sides of the face of the magnetic slot, on the positioning region most salient point with it is described
Distance H is less than or equal to 1/3 times of permanent magnetism body thickness B4 between magnetic slot outer side edges.
In particular, when the slit is connected with the magnetic slot, in one group of institute of the same magnetic slot of correspondence
It states in slit, all two sides tilt the slit to the left and right respectively on the basis of the center line of the magnetic slot, described in correspondence
Through-hole is arranged in the centerline of magnetic slot, and the through-hole is connected with the magnetic slot.
Further, the angle theta between the slit and the magnetic slot lateral surface is more than or equal to 30 ° and is less than or equal to 60 °.
On the other hand, the invention adopts the following technical scheme:
A kind of motor, the rotor including above-mentioned permanent magnet synchronous motor.
The rotor of permanent magnet synchronous motor of the present invention is provided with slit on the outer edge of rotor body, slit is connected to stator
Air gap between rotor is connected with magnetic slot, solve existing rare-earth permanent magnet motor rotor magnetic field stator inner sidewall with
There are a large amount of harmonic waves in air gap between rotor lateral wall, reduce the electromagnetic noise of motor, reduce stator and turns
Eddy-current loss on son, air gap flux density height sineization.
Motor of the present invention includes the rotor of above-mentioned permanent magnet synchronous motor, and complete machine electromagnetic noise is low, and use state is stablized, and is made
It is long with the service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the rotor for the permanent magnet synchronous motor that the preferred embodiment of the present invention one provides；
Fig. 2 is the partial enlarged view in Fig. 1 at C；
Fig. 3 is the structural schematic diagram of the rotor for the permanent magnet synchronous motor that the preferred embodiment of the present invention two provides；
Fig. 4 is the partial enlarged view in Fig. 3 at D；
Fig. 5 is the structural schematic diagram of the rotor for the permanent magnet synchronous motor that the preferred embodiment of the present invention three provides.
In figure:
1, rotor body；2, magnetic slot；3, slit；4, sunk structure；5, through-hole；21, projective structure；22, positioning region.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Preferred embodiment one:
This preferred embodiment discloses a kind of rotor of permanent magnet synchronous motor.As depicted in figs. 1 and 2, the edge on rotor body 1
Multiple magnetic slots 2 circumferentially are evenly distributed with, permanent magnet (not shown) are inserted in magnetic slot 2, adjacent permanent magnet polarity is opposite；
On the outer edge of rotor body 1 and correspond at magnetic slot 2 and be provided with multiple slits 3, slit 3 be connected to stator and rotor it
Between air gap, the inner end of slit 3 is located on same circular arc line.
Preferably, whole slits 3 is of same size；Slit 3 corresponding to the same magnetic slot 2 is same group, and every group narrow
Center line symmetrical setting of the whole slits 3 about permanent magnet in seam 3；It include five slits 3 in every group of slit 3, in the structure
Rotor body 1 has enough mechanical strengths, while can effectively inhibit the circulation of rotor magnetic cross flux.The extending direction of slit 3
Perpendicular to the extending direction of the magnetic slot 2 corresponding to it.
Slit 3 is set on the outer edge of rotor body 1 and the inner end of slit 3 is located on same circular arc line, Ke Yiyou
Effect inhibits the flowing of the magnetic cross flux of rotor magnetic circuit, and hardly changes d-axis magnetic circuit magnetic flux, draws so as to limit rotor flux
The amplitude of the higher hamonic wave risen, can inhibit noise.
The center A of circular arc line where the inner end of slit 3 is located at the center O of rotor body 1 and the line at permanent magnet center
On extended line (permanent magnet herein refers to the permanent magnet in the magnetic slot 2 that this group of slit 3 corresponds to), by adjusting the two circles
The distance between heart B5 can reasonably adjust the geomery of slit 3, be beneficial to reasonable magnetic flux flows, while making air gap flux density
There is the Sine distribution of more standard.
The distance between A point and O point B5 are preferably greater than or equal to permanent magnetism body thickness B4 and less than or equal to permanent magnetism body thickness B4's
1.5 times, air gap flux density distribution can be improved and influence the magnetic field of permanent magnet.
In order to effectively reduce the higher harmonic content of air gap flux density, improve air gap flux density, the width B1 of slit 3 is less than etc.
In 1/3 times of permanent magnetism body thickness B4.
The lateral wall of rotor body 1 between two adjacent groups slit 3 is inwardly formed sunk structure 4, and the two of magnetic slot 2
Radially outward formation projective structure 21 of the side end along rotor body 1.Sunk structure 4 is similar with the shape of projective structure 21, right
It should be arranged, to guarantee certain gas length and magnetic flux circulation width, improve flux density distribution, reduce leakage field.
The width B2 of sunk structure 4 is more than or equal to 0.85 of distance B3 between the projective structure 21 of two neighboring magnetic slot 2
Again and less than or equal to 1.1 times of distance B3 between the projective structure 21 of two neighboring magnetic slot 2.Wherein, two neighboring magnetic slot
Distance B3 refers to the spacing between the outer side edges of the projective structure 21 of two neighboring magnetic slot 2 between 2 projective structure 21.
Positioning region 22 is formed at the both sides of the face of magnetic slot 2, the permanent magnetism physical efficiency being located in magnetic slot 2 is played certain
Positioning function inhibits influence of the circumferential exciting force to permanent magnet, noise caused by effectively reducing due to permanent magnet trembling.Positioning region
22 concrete shape is unlimited, and distance H is preferably smaller than equal to permanent magnet between 2 outer side edges of most salient point and magnetic slot on positioning region 22
1/3 times of thickness B4 can not increase the leakage magnetic flux of permanent magnet, and can limit the magnetic cross flux of rotor.
In order to not influence the mechanical strength of rotor body 1 and the stress condition of permanent magnet, the slit that is opened up on rotor body 1
3 quantity is N, 9 >=N >=3.
Preferred embodiment two:
This preferred embodiment discloses a kind of rotor of permanent magnet synchronous motor, and structure and preferred embodiment one are essentially identical.
The difference is that as shown in Figure 3 and Figure 4, it is on the outer edge of rotor body 1 and multiple corresponding to being provided at magnetic slot 2
Slit 3, slit 3 are connected with magnetic slot 2, and the outer end of slit 3 is located on same circular arc line.Circular arc where the outer end of slit 3
The center of line is overlapped with the center of rotor body 1.
The magnetic circuit for improving rotor, make air-gap field be distributed more sinusoidalization, slackened higher hamonic wave to stator, rotor and
The influence of permanent magnet, further suppresses electromagnetic noise, reduces core loss.
Preferred embodiment three:
This preferred embodiment discloses a kind of rotor of permanent magnet synchronous motor, and structure and preferred embodiment two are essentially identical.
The difference is that as shown in figure 5, whole slits 3 are in one group of slit 3 of the same magnetic slot 2 of correspondence with magnetic slot 2
Two sides tilt to the left and right respectively on the basis of center line, and through-hole 5, through-hole 5 and magnetic slot is arranged in the centerline of corresponding magnetic slot 2
2 are connected.
In order to improve air gap flux density and rotor flux, the anti-demagnetization capability for increasing permanent magnet, 2 outside of slit 3 and magnetic slot
Angle theta between face is preferably greater than or equal to 30 ° and is less than or equal to 60 °.
In order to be not easily broken when guaranteeing permanent magnet stress, inhibit rotor magnetic cross flux flowing, limit flux density high order it is humorous
The gap width B7 of wave amplitude, through-hole 5 and 2 junction of magnetic slot is preferably smaller than the maximum width B6 for being equal to through-hole 5.
Preferred embodiment four:
This preferred embodiment discloses a kind of motor, including such as the described in any item permanent magnet synchronous electrics of preferred embodiment one to three
The rotor of machine.
Note that the technical principle that above are only presently preferred embodiments of the present invention and used.Those skilled in the art can manage
Solution, the invention is not limited to the specific embodiments described herein, is able to carry out various apparent changes for a person skilled in the art
Change, readjust and substitutes without departing from protection scope of the present invention.Therefore, although by above embodiments to the present invention into
It has gone and has been described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept,
It can also include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (7)
1. a kind of rotor of permanent magnet synchronous motor has been uniformly distributed circumferentially multiple magnetic slots (2), institute on rotor body (1)
It states in magnetic slot (2) and is inserted with permanent magnet, adjacent permanent magnet polarity is opposite；It is characterized in that, in the outer of the rotor body (1)
On edge and correspond at the magnetic slot (2) and be provided with multiple slits (3), the slit (3) be connected to stator and rotor it
Between air gap, the inner end of the slit (3) is located on same circular arc line；Corresponding to the described of the same magnetic slot (2)
Slit (3) is same group, center line symmetrical setting of the whole slits (3) about permanent magnet in every group of slit (3)；
When the slit (3) is connected to the air gap between stator and rotor, where the inner end of the slit (3) in circular arc line
Heart A is located on the extended line of the center O of the rotor body (1) and the line at the permanent magnet center；The permanent magnet is institute
State the permanent magnet in the magnetic slot (2) that slit (3) corresponds to；It is thick that the distance between A point and O point B5 are more than or equal to permanent magnet
It spends B4 and is less than or equal to 1.5 times of permanent magnetism body thickness B4.
2. the rotor of permanent magnet synchronous motor according to claim 1, which is characterized in that the width B1 of the slit (3) is small
In being equal to 1/3 times of permanent magnetism body thickness B4.
3. the rotor of permanent magnet synchronous motor according to claim 1, which is characterized in that be located at slit described in two adjacent groups
(3) lateral wall of the rotor body (1) between is inwardly formed sunk structure (4), the both side ends edge of the magnetic slot (2)
The radially outward formation projective structure (21) of the rotor body (1).
4. the rotor of permanent magnet synchronous motor according to claim 3, which is characterized in that the width of the sunk structure (4)
B2 is more than or equal to 0.85 times of distance B3 between the projective structure (21) of the two neighboring magnetic slot (2) and is less than or equal to phase
1.1 times of distance B3 between the projective structure (21) of adjacent two magnetic slots (2).
5. the rotor of permanent magnet synchronous motor according to any one of claims 1 to 4, which is characterized in that the slit (3)
Extend perpendicularly to the extending direction of the magnetic slot (2) corresponding to it.
6. the rotor of permanent magnet synchronous motor according to any one of claims 1 to 4, which is characterized in that in the magnetic slot
(2) positioning region (22) are formed at both sides of the face, on the positioning region (22) most salient point and the magnetic slot (2) outer side edges it
Between distance H be less than or equal to 1/3 times of permanent magnetism body thickness B4.
7. a kind of motor, which is characterized in that turn including permanent magnet synchronous motor such as according to any one of claims 1 to 6
Son.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610910491.2A CN106340982B (en) | 2016-10-19 | 2016-10-19 | Rotor of permanent magnet synchronous motor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610910491.2A CN106340982B (en) | 2016-10-19 | 2016-10-19 | Rotor of permanent magnet synchronous motor and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106340982A CN106340982A (en) | 2017-01-18 |
| CN106340982B true CN106340982B (en) | 2018-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610910491.2A Active CN106340982B (en) | 2016-10-19 | 2016-10-19 | Rotor of permanent magnet synchronous motor and motor |
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| CN (1) | CN106340982B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017207940A1 (en) * | 2017-05-11 | 2018-11-15 | Robert Bosch Gmbh | Rotor and electric machine |
| CN107294244A (en) * | 2017-07-27 | 2017-10-24 | 广东美芝制冷设备有限公司 | Rotor, magneto and compressor |
| CN107591912B (en) * | 2017-08-30 | 2019-09-27 | 广东威灵电机制造有限公司 | Rotor core, motor, compressor and the refrigeration system with the compressor |
| CN107591911B (en) * | 2017-08-30 | 2020-01-24 | 广东威灵电机制造有限公司 | Rotor punching sheet, rotor core, motor and compressor |
| CN107453502B (en) * | 2017-08-31 | 2023-07-04 | 广东美芝制冷设备有限公司 | Motor rotor, motor and compressor |
| CN107994748B (en) * | 2017-12-11 | 2024-08-20 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure and motor with same |
| JP7053392B2 (en) * | 2018-07-13 | 2022-04-12 | オークマ株式会社 | Rotor of synchronous motor |
| CN110994836B (en) * | 2019-12-09 | 2020-11-24 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
| CN110994839B (en) * | 2019-12-16 | 2020-11-17 | 珠海格力电器股份有限公司 | Electric motor rotor and alternating-pole electric motor |
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|---|---|---|---|---|
| JP2005245148A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Electric Corp | Permanent magnet motor, enclosed compressor, and fan motor |
| CN1976170A (en) * | 2005-12-01 | 2007-06-06 | 爱知Elec株式会社 | Permanent magnet rotating machine |
| CN101771317A (en) * | 2009-01-06 | 2010-07-07 | 株式会社日立制作所 | Permanent magnetism type electric rotating machine |
| CN104158322A (en) * | 2014-07-31 | 2014-11-19 | 广东威灵电机制造有限公司 | Motor rotor and motor with same |
| CN206211698U (en) * | 2016-10-19 | 2017-05-31 | 珠海格力节能环保制冷技术研究中心有限公司 | The rotor and motor of permagnetic synchronous motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3631583B2 (en) * | 1997-03-31 | 2005-03-23 | 三菱電機株式会社 | Permanent magnet motor |
-
2016
- 2016-10-19 CN CN201610910491.2A patent/CN106340982B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005245148A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Electric Corp | Permanent magnet motor, enclosed compressor, and fan motor |
| CN1976170A (en) * | 2005-12-01 | 2007-06-06 | 爱知Elec株式会社 | Permanent magnet rotating machine |
| CN101771317A (en) * | 2009-01-06 | 2010-07-07 | 株式会社日立制作所 | Permanent magnetism type electric rotating machine |
| CN104158322A (en) * | 2014-07-31 | 2014-11-19 | 广东威灵电机制造有限公司 | Motor rotor and motor with same |
| CN206211698U (en) * | 2016-10-19 | 2017-05-31 | 珠海格力节能环保制冷技术研究中心有限公司 | The rotor and motor of permagnetic synchronous motor |
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| Publication number | Publication date |
|---|---|
| CN106340982A (en) | 2017-01-18 |
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Effective date of registration: 20181204 Address after: 519070, Jinji Hill Road, front hill, Zhuhai, Guangdong Applicant after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Address before: 519070 science and technology building, 789 Jinji Road, Qianshan, Zhuhai, Guangdong Applicant before: GREE GREEN REFRIGERATION TECHNOLOGY CENTER Co.,Ltd. OF ZHUHAI |
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