CN108512329A - A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor for including the magnetic steel built-in type rotor - Google Patents
A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor for including the magnetic steel built-in type rotor Download PDFInfo
- Publication number
- CN108512329A CN108512329A CN201810394868.2A CN201810394868A CN108512329A CN 108512329 A CN108512329 A CN 108512329A CN 201810394868 A CN201810394868 A CN 201810394868A CN 108512329 A CN108512329 A CN 108512329A
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- Prior art keywords
- iron core
- magnetic
- rotor
- poles
- magnet steel
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Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 59
- 239000010959 steel Substances 0.000 title claims abstract description 59
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 35
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000010586 diagram Methods 0.000 description 11
- 230000006872 improvement Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 210000003781 tooth socket Anatomy 0.000 description 2
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]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A kind of magnetic steel built-in type rotor disclosed by the invention, including an iron core, the peripheral surface of the iron core is a cylindrical surface, the iron core inner circumferential be spaced apart equipped with it is several axially through magnetic slot, it is provided with a magnet steel in each magnetic slot, the magnet steel, which is the poles S magnet steel or the poles N magnet steel and the poles S magnet steel, to be staggered with the poles N magnet steel along the iron core is circumferentially-spaced；It is respectively separated and opens up there are two through-hole positioned at the outer fix of each magnetic slot in the iron core.Also disclose include the magnetic steel built-in type rotor permanent magnet synchronous motor.The present invention significantly reduces the harmonic content of permanent magnet synchronous motor counter electromotive force, improve the sine degree of back emf waveform, to reduce the difficulty that electric machine controller controls motor, improve motor control accuracy, the cogging torque come by stator teeth notching and rotor banding is also significantly reduced simultaneously, motor operation noise is reduced, the comfort of new-energy automobile is improved.
Description
Technical field
The present invention relates to new-energy automobile driving motor technical field more particularly to a kind of magnetic steel built-in type rotor and comprising
The permanent magnet synchronous motor of the magnetic steel built-in type rotor.
Background technology
Since permanent magnet synchronous motor has small, light-weight, torque power density is big, efficient, governor control characteristics is good etc.
Advantage, existing new-energy automobile driving motor are generally used permanent magnet synchronous motor.
Referring to Fig. 1, the permanent magnet synchronous motor for new-energy automobile driving motor includes rotor 10 and is arranged in rotor
Stator 20 on 10 outside referring to Fig. 2 and combines Fig. 1, and rotor 10 is an iron core, and circumferentially uniform intervals open up in rotor 10
Have eight axially through magnetic slot 11, a magnet steel 12 is provided in each magnetic slot 11, magnet steel 12 is the poles S magnet steel or the poles N magnetic
Steel and the poles S magnet steel are staggered with the poles N magnet steel along the circumferential uniform intervals of rotor 10.Rotor 10 uses Interior permanent magnet formula structure,
Quadrature axis inductance is bigger than d-axis inductance, has prodigious salient pole ratio, is controlled convenient for weak-magnetic speed-regulating, and can effectively utilize magnetic resistance and turn
Square improves the torque density of motor.But this style of rotor will also result in that counter electromotive force of motor harmonic content is more, tooth socket
The problems such as torque is big, referring to Fig. 3 and Fig. 4, what is provided in figure is the back emf waveform and tooth socket of existing permanent magnet synchronous motor
The schematic diagram of torque profile, it can be seen from the figure that containing more harmonic content in counter electromotive force, Waveform sine is poor.In this way
It is unfavorable for accurately controlling for Motor torque, while brings the noise problem of electric drive system.
New-energy automobile driving motor requires low noise and the control of accurate motor, and this requires permanent magnet synchronous motors in magnetic
Effective measures are considered when road is designed to reduce the harmonic content of counter electromotive force, reduce cogging torque.Generally use skewed stator slot or
The measures such as skewed-rotor improve the sine degree of back emf waveform, reduce cogging torque, but skewed stator slot and skewed-rotor are wanted
Iron core is asked to rotate a certain angle, complex process and manufacturing cost height.
For this purpose, applicant carried out beneficial exploration and trial, result of the above problems is had found, will be detailed below being situated between
The technical solution to continue generates in this background.
Invention content
The first technical problem to be solved by the present invention is：For existing permanent magnet synchronous motor, that there are counter electromotive force is humorous
The problems such as wave content is more, back emf waveform sine degree is poor, control accuracy is poor, cogging torque is big, operation noise is big, and
A kind of counter electromotive force harmonic content being effectively reduced permanent magnet synchronous motor is provided, the sine degree for improving back emf waveform, is carried
High motor control accuracy, the permanent magnet synchronous motor magnetic steel built-in type rotor for reducing cogging torque, reducing motor operation noise.
The second technical problem to be solved by the present invention is：There is provided it is a kind of include above-mentioned magnetic steel built-in type rotor forever
Magnetic-synchro motor.
It is as a kind of magnetic steel built-in type rotor of first aspect present invention, including an iron core, the peripheral surface of the iron core
One cylindrical surface, the iron core inner circumferential be spaced apart equipped with it is several axially through magnetic slot, be provided with a magnetic in each magnetic slot
Steel, the magnet steel, which is the poles S magnet steel or the poles N magnet steel and the poles S magnet steel, to be staggered with the poles N magnet steel along the iron core is circumferentially-spaced；Its
It is characterized in that, is respectively separated and opens up there are two through-hole positioned at the outer fix of each magnetic slot in the iron core.
In a preferred embodiment of the invention, described two through-holes are symmetrically distributed in pole center corresponding thereto
The both sides of line.
In a preferred embodiment of the invention, the radial section of each through-hole is in eye shape, and is justified by first segment
Arc and second segment circular arc enclose, and the center of circle of the first segment circular arc is located on the center line of the peripheral surface of the iron core, institute
State the center line of the extended line of the center of first segment circular arc and the line of centres of second segment circular arc by the peripheral surface of the iron core.
In a preferred embodiment of the invention, on the peripheral surface of the iron core be located at two adjacent magnetic slots it
Between be respectively arranged with an axially extending V-type groove.
As a kind of permanent magnet synchronous motor of second aspect of the present invention, including rotor and it is arranged in the outside of the rotor
On stator, which is characterized in that the rotor be above-mentioned magnetic steel built-in type rotor.
In a preferred embodiment of the invention, the ratio of the number of stator slots of the stator and the rotor number of poles of the rotor
Example is 3:2.
As a result of technical solution as above, the beneficial effects of the present invention are：The present invention in iron core by being located at
The outer fix of each magnetic slot, which is respectively separated, to be opened up there are two through-hole, and permanent magnet synchronous motor counter electromotive force is significantly reduced
Harmonic content improves the sine degree of back emf waveform, to reduce the difficulty that electric machine controller controls motor, improves
Motor control accuracy, while the cogging torque come by stator teeth notching and rotor banding is also significantly reduced, reduce motor operation
Noise improves the comfort of new-energy automobile.The structure letter of the permanent magnet synchronous motor and its magnetic steel built-in type rotor of the present invention
Single, easy to process, manufacturing cost is low.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of existing permanent magnet synchronous motor.
Fig. 2 is the structural schematic diagram of the rotor of existing permanent magnet synchronous motor.
Fig. 3 is the schematic diagram of the back emf waveform of existing permanent magnet synchronous motor.
Fig. 4 is the schematic diagram of the cogging torque of existing permanent magnet synchronous motor.
Fig. 5 is the structural schematic diagram of the permanent magnet synchronous motor of the present invention.
Fig. 6 is the structural schematic diagram of the magnetic steel built-in type rotor of the permanent magnet synchronous motor of the present invention.
Fig. 7 is the schematic diagram of the back emf waveform of the permanent magnet synchronous motor of the present invention.
Fig. 8 is the schematic diagram of the cogging torque of the permanent magnet synchronous motor of the present invention.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Fig. 5, what is provided in figure is a kind of permanent magnet synchronous motor, including magnetic steel built-in type rotor 100 and setting exist
Stator 200 on the outside of magnetic steel built-in type rotor 100.Wherein, the number of stator slots of stator 200 and magnetic steel built-in type rotor 100
Rotor number of poles ratio be 3:2.
Referring to Fig. 6 and Fig. 5 is combined, magnetic steel built-in type rotor 100 includes an iron core 100, and the peripheral surface 101 of iron core 100 is
One smooth cylindrical surface, 100 inner circumferential of iron core be spaced apart be equipped with eight axially through magnetic slot 110.Certainly, magnetic slot 110
Quantity be not limited to the quantity in the present embodiment, should be designed according to actual demand, but should meet number of stator slots with turn
The ratio of sub- number of poles is 3:2 condition.A magnet steel 120 is provided in each magnetic slot 110, magnet steel 120 is the poles S magnet steel or the poles N
Magnet steel and the poles S magnet steel and the poles N magnet steel are staggered along iron core 100 is circumferentially-spaced.
Through-hole 130 there are two being respectively separated and open up in the interior outer fix positioned at each magnetic slot 110 of iron core 100, two
Through-hole 130 is symmetrically distributed in the both sides of pole center line corresponding thereto.In the present embodiment, the radial direction of each through-hole 130
Section is in eye shape, and is enclosed by first segment circular arc 131 and second segment circular arc 132, the center of circle position of first segment circular arc 131
In on the center line of the peripheral surface 101 of iron core 100, the center of first segment circular arc 131 and the line of centres of second segment circular arc 132
Extended line passes through the center line of the peripheral surface 101 of iron core 100.
Since the magnetic flux of permanent magnet synchronous motor then is passed through from the poles motor N after the iron core 100 above magnet steel 120
The air gap crossed between magnetic steel built-in type rotor 100 and stator 200 reaches stator 200, then again returns to magnetic steel built-in type rotor
Air gap between 100 and stator 200 reaches the poles S and forms closed loop, and two through-holes 130 on iron core 100 change the magnetic of iron core 100
Conductance can influence the magnetic flux distribution of magnet steel 120, to reach the harmonic content for improving counter electromotive force of motor, counter electromotive force wave
The sine degree of shape and the purpose of cogging torque.Referring to Fig. 7, what is provided in figure is the anti-electronic of the permanent magnet synchronous motor of the present invention
The schematic diagram of gesture waveform, it can be seen from the figure that the harmonic content content of counter electromotive force is low, the Waveform sine of counter electromotive force obtains
Larger improvement.Referring to Fig. 8, what is provided in figure is the schematic diagram of the cogging torque waveform of the permanent magnet synchronous motor of the present invention,
It can be seen from the figure that cogging torque is also preferably inhibited.
Axially prolong in addition, being respectively arranged with one between two adjacent magnetic slots 110 on the peripheral surface of iron core 100
The design of the V-type groove 140 stretched, V-type groove 140 can reduce the leakage field generated between the poles S magnet steel and the poles N magnet steel, further carry
The high performance of motor.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (6)
1. the peripheral surface of a kind of magnetic steel built-in type rotor, including an iron core, the iron core is a cylindrical surface, the iron core inner circumferential
Be spaced apart equipped with it is several axially through magnetic slot, a magnet steel is provided in each magnetic slot, the magnet steel is the poles S magnet steel or N
Pole magnet steel and the poles S magnet steel and the poles N magnet steel are staggered along the iron core is circumferentially-spaced；It is characterized in that, the position in the iron core
Through-hole there are two being respectively separated and open up in the outer fix of each magnetic slot.
2. magnetic steel built-in type rotor as described in claim 1, which is characterized in that described two through-holes are symmetrically distributed in and its phase
The both sides of corresponding pole center line.
3. magnetic steel built-in type rotor as claimed in claim 2, which is characterized in that the radial section of each through-hole is in eyes shape
Shape, and enclosed by first segment circular arc and second segment circular arc, the center of circle of the first segment circular arc is located at the periphery of the iron core
On the center line in face, the center of the first segment circular arc and the extended line of the line of centres of second segment circular arc pass through the iron core
The center line of peripheral surface.
4. magnetic steel built-in type rotor as claimed any one in claims 1 to 3, which is characterized in that in the periphery of the iron core
On face an axially extending V-type groove is respectively arranged between two adjacent magnetic slots.
5. a kind of permanent magnet synchronous motor, including rotor and the stator that is arranged on the outside of the rotor, which is characterized in that institute
It is magnetic steel built-in type rotor according to any one of claims 1 to 4 to state rotor.
6. permanent magnet synchronous motor as claimed in claim 5, which is characterized in that the number of stator slots of the stator and the rotor
The ratio of rotor number of poles is 3:2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810394868.2A CN108512329A (en) | 2018-04-27 | 2018-04-27 | A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor for including the magnetic steel built-in type rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810394868.2A CN108512329A (en) | 2018-04-27 | 2018-04-27 | A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor for including the magnetic steel built-in type rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108512329A true CN108512329A (en) | 2018-09-07 |
Family
ID=63399168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810394868.2A Pending CN108512329A (en) | 2018-04-27 | 2018-04-27 | A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor for including the magnetic steel built-in type rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108512329A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964313A (en) * | 2018-09-21 | 2018-12-07 | 南京埃斯顿自动化股份有限公司 | A kind of built-in type permanent-magnet servo motor of rotor fluting |
| CN112448507A (en) * | 2020-11-02 | 2021-03-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor core, rotor structure, motor, compressor and air conditioner with rotor core and rotor structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026464A (en) * | 2016-06-27 | 2016-10-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and permanent-magnet synchronous motor |
| CN206041679U (en) * | 2016-09-30 | 2017-03-22 | 横店集团英洛华电气有限公司 | Rotor sheet |
| CN208337264U (en) * | 2018-04-27 | 2019-01-04 | 创驱（上海）新能源科技有限公司 | A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor comprising the magnetic steel built-in type rotor |
-
2018
- 2018-04-27 CN CN201810394868.2A patent/CN108512329A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026464A (en) * | 2016-06-27 | 2016-10-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and permanent-magnet synchronous motor |
| CN206041679U (en) * | 2016-09-30 | 2017-03-22 | 横店集团英洛华电气有限公司 | Rotor sheet |
| CN208337264U (en) * | 2018-04-27 | 2019-01-04 | 创驱（上海）新能源科技有限公司 | A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor comprising the magnetic steel built-in type rotor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964313A (en) * | 2018-09-21 | 2018-12-07 | 南京埃斯顿自动化股份有限公司 | A kind of built-in type permanent-magnet servo motor of rotor fluting |
| WO2020057146A1 (en) * | 2018-09-21 | 2020-03-26 | 南京埃斯顿自动化股份有限公司 | Built-in permanent magnet servo motor having rotor slots |
| CN112448507A (en) * | 2020-11-02 | 2021-03-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor core, rotor structure, motor, compressor and air conditioner with rotor core and rotor structure |
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| 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: 20180907 |