CN108321950A - A kind of high-speed permanent magnetic body synchronous motor rotor structure - Google Patents
A kind of high-speed permanent magnetic body synchronous motor rotor structure Download PDFInfo
- Publication number
- CN108321950A CN108321950A CN201810193575.8A CN201810193575A CN108321950A CN 108321950 A CN108321950 A CN 108321950A CN 201810193575 A CN201810193575 A CN 201810193575A CN 108321950 A CN108321950 A CN 108321950A
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- China
- Prior art keywords
- permanent magnet
- magnetic body
- synchronous motor
- permanent
- subject
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 30
- 230000005405 multipole Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 5
- 239000010445 mica Substances 0.000 claims description 5
- 229910052618 mica group Inorganic materials 0.000 claims description 5
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000003781 tooth socket Anatomy 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910002551 Fe-Mn Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 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
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The present invention discloses a kind of high-speed permanent magnetic body synchronous motor rotor structure, the high-speed permanent magnetic body synchronous motor rotor structure includes rotor subject and the multipole permanent magnet pole being arranged on the rotor subject, wherein, each permanent magnet pole respectively includes multiple permanent magnets, and the cross section of each permanent magnet is fillet isosceles trapezoid；On the rotor subject circumferential annular be provided with shape, quantity with the matched embedding groove of permanent magnet, each embedding groove is for housing the permanent magnet, and the thickness of the magnetic bridge in the permanent magnet pole of every pole between two adjacent permanent magnets is that the thickness of one end close apart from the axle center of rotor subject is more than the thickness of one end remote apart from the axle center of rotor subject.High-speed permanent magnetic body synchronous motor rotor structure of the present invention is when rotating at high speed, the tensile stress that each permanent magnet is subject to is far smaller than the tensile stress that a monoblock permanent magnet pole is subject in the prior art, to which the tensile strength of high-speed permanent magnetic body synchronous motor rotor structure of the present invention when rotating at high speed can be improved.
Description
Technical field
The present invention relates to technical field of motors, more particularly to a kind of high-speed permanent magnetic body synchronous motor rotor structure.
Background technology
High-speed permanent magnetic synchronous motor is generally as depicted in figs. 1 and 2 at present, and permanent magnet pole 1 is arranged on rotor subject 2,
In, permanent magnet pole 1 generally uses Ru-Fe-Mn permanent-magnet material, this material property to be that compression strength is bigger, but tensile strength
Very little, when the permanent magnet of high-speed permanent magnetic synchronous motor uses the device mode of surface-mount type, it is difficult to bear rotor high speed rotation
Generate huge tensile stress, it is necessary to which the non-magnetic rotor jacket 3 of high intensity is set outside permanent magnet, but this mode turns in higher
The phenomenon that permanent magnet is susceptible to insufficient strength and loosens when fast, causes permanent magnetism fragmentation body, protective jacket to fall off.
In addition, when rotating at high speed, the nodal force distributed pole that conventional orthogonal, wedge angle permanent magnet are subject to is uneven, right angle,
The nodal force that wedge angle is nearby subject to is very big, and permanent magnet is easily broken.A traditional monoblock permanent magnet is produced in rotor high speed rotation
Raw eddy-current loss is very big, and tooth socket loss is not also small, and permanent magnet fever is serious, easily demagnetization, electric efficiency is low.
Invention content
The object of the present invention is to provide a kind of high-speed permanent magnetic body synchronous motor rotor structures, and tensile strength can be improved.
To achieve the above object, the present invention provides following schemes：
A kind of high-speed permanent magnetic body synchronous motor rotor structure, the high-speed permanent magnetic body synchronous motor rotor structure includes rotor
Main body and the multipole permanent magnet pole being arranged on the rotor subject,
Wherein, each permanent magnet pole respectively includes multiple permanent magnets, and the cross section of each permanent magnet is fillet etc.
Waist is trapezoidal；Circumferential annular is provided with shape, quantity with the matched embedding groove of permanent magnet on the rotor subject, each described to inlay
Slot is for housing the permanent magnet, and the thickness of the magnetic bridge in the permanent magnet pole of every pole between two adjacent permanent magnets is that distance turns
The thickness of close one end in axle center of sub- main body is more than the thickness of one end remote apart from the axle center of rotor subject.
Optionally, the material of the epitaxial part of embedding groove is silicon steel sheet in the rotor subject.
Optionally, each permanent magnet is in the skewed slot along axis direction with setting angle of inclination.
Optionally, the angle of inclination that sets is 7.5 °.
Optionally, using interference fit between each permanent magnet and the rotor subject.
Optionally, each permanent magnet respectively include multiple shapes just as permanent magnet unit and be arranged two neighboring
The insulating concrete mica plate in gap between permanent magnet unit.
Optionally, the quantity of permanent magnet unit is 6 in each permanent magnet.
According to specific embodiment provided by the invention, the invention discloses following technique effects：
High-speed permanent magnetic body synchronous motor rotor structure of the present invention is equal by the way that a monoblock permanent magnet pole is divided into multiple permanent magnets
It is even to be arranged on rotor subject, there is certain thickness magnetic bridge between two adjacent permanent magnets in the permanent magnet pole of every pole, in height
The tensile stress that each permanent magnet is subject to when speed rotation is far smaller than the tensile stress that a monoblock permanent magnet pole is subject in the prior art, from
And the tensile strength of high-speed permanent magnetic body synchronous motor rotor structure of the present invention when rotating at high speed can be improved.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the cross-sectional structure figure of traditional durface mounted permanent magnet body synchronous motor rotor structure；
Fig. 2 is the structure chart of the permanent magnet pole in conventional synchronization motor；
Fig. 3 is the cross-sectional structure figure of high-speed permanent magnetic body synchronous motor rotor structure of the embodiment of the present invention；
Fig. 4 is the structure chart of the permanent magnet pole of high-speed permanent magnetic body synchronous motor rotor structure of the embodiment of the present invention；
Fig. 5 is the permanent magnetism body axis direction structure chart of the embodiment of the present invention；
Fig. 6 is the nodal force cloud atlas that the fillet isosceles trapezoid permanent magnet of the embodiment of the present invention is subject to；
Fig. 7 is the nodal force oscillogram that the fillet isosceles trapezoid permanent magnet of the embodiment of the present invention is subject to；
Fig. 8 is the nodal force cloud atlas that traditional isosceles trapezoid permanent magnet is subject to；
Fig. 9 is the nodal force oscillogram that traditional isosceles trapezoid permanent magnet shown in Fig. 8 is subject to.
Symbol description：
Permanent magnet pole -1, rotor subject -2, rotor jacket -3, permanent magnet -10, magnetic bridge -11, permanent magnet list
Member -12, gap -13, insulating concrete mica plate -14.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of high-speed permanent magnetic body synchronous motor rotor structure, by by a monoblock permanent magnet pole
It is divided into multiple permanent magnets to be uniformly arranged on rotor subject, there is in the permanent magnet pole of every pole between two adjacent permanent magnets certain thickness
The magnetic bridge of degree, the tensile stress that each permanent magnet is subject to when rotating at high speed are far smaller than a monoblock permanent magnet pole in the prior art
The tensile stress being subject to is strong to which the tension of high-speed permanent magnetic body synchronous motor rotor structure of the present invention when rotating at high speed can be improved
Degree.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
As shown in figure 3, high-speed permanent magnetic body synchronous motor rotor structure of the present invention includes rotor subject 2 and is arranged described
Multipole permanent magnet pole 1 on rotor subject 2.Wherein, each permanent magnet pole 1 respectively includes multiple permanent magnets 10 (such as Fig. 3 and figure
Shown in 4), and the cross section of each permanent magnet is fillet isosceles trapezoid；Circumferential annular setting is tangible on the rotor subject 2
Shape, quantity are with 10 matched embedding groove of permanent magnet, and each embedding groove is for housing the permanent magnet 10, and every pole permanent magnet
The thickness of magnetic bridge 11 between extremely middle two adjacent permanent magnets is that the thickness of one end close apart from the axle center of rotor subject 2 is more than
The thickness of one end remote apart from the axle center of rotor subject 2.
In the present embodiment, two-poled permanent magnets pole 1 is provided on the rotor subject 2, and each permanent magnet pole 1 includes 9
A permanent magnet 10, but be not limited thereto, it can be adjusted assembly according to actual needs.
Since the extended line of 10 the right and left of each permanent magnet does not meet at the center of circle, the thickness of the magnetic bridge 11 between permanent magnet is set to be in
One end now close from rotor axis is larger, and one end remote from rotor axis is smaller, in this way the setting magnetic bridge parallel compared to both sides
Benefit is that magnetism isolating effect is more preferable, more uniform, the stator core loss smaller of tangential air-gap flux distribution.
Further, the epitaxial part of embedding groove is equivalent to rotor jacket 3 shown in Fig. 1, institute in the rotor subject 2
The material for stating epitaxial part is silicon steel sheet.Preferably, each section (including embedding groove and epitaxial part) of the rotor subject 2 is
It is integrally formed.
In assembly, since permanent magnet to rotor edge (i.e. the epitaxial part of embedding groove) this section of silicon steel sheet has certain thickness
Degree, is equivalent to rotor jacket, while can provide the intensity that conventional rotors sheath does not provide again；Each permanent magnet and institute simultaneously
It states between rotor subject using interference fit, applies the precompression of setting to permanent magnet, but due to a monoblock permanent magnet pole
Through being divided into several permanent magnets, there is certain thickness magnetic bridge between adjacent permanent magnet block, when rotating at high speed each permanent magnet by
To tensile stress be far smaller than the tensile stress that is subject to of a monoblock originally so that high-speed permanent magnetic body synchronous electric motor rotor of the present invention
Structure has enough intensity when rotating at high speed.
In high-speed permanent magnetic body synchronous motor rotor structure of the present invention, permanent magnet is arranged to fillet isosceles trapezoid, such phase
Benefit than being arranged to traditional isosceles trapezoid permanent magnet that circular arc is not processed at four angles is, when rotating at high speed, each permanent magnetism
The nodal force smaller that body is subject to, and nodal force distribution be not centered at sharp corner, more uniformly.
Fig. 6, Fig. 7 are the nodal force cloud atlas and node Reeb that fillet isosceles trapezoid permanent magnet of the embodiment of the present invention is subject to respectively
Shape figure, Fig. 8, Fig. 9 be respectively four angles be not processed into nodal force cloud atlas that traditional isosceles trapezoid permanent magnet of circular arc is subject to
Nodal force oscillogram, fillet isosceles trapezoid permanent magnet reduce about compared to the nodal force mean value that isosceles trapezoid permanent magnet is subject to
140N.M, while the nodal force that isosceles trapezoid permanent magnet is subject to focuses mostly in sharp corner, and fillet isosceles trapezoid permanent magnet by
Nodal force do not concentrate, more uniformly.
Further, each permanent magnet is in the skewed slot along axis direction with setting angle of inclination.In the present embodiment,
The angle of inclination that sets is not limited thereto as 7.5 °, can also be 8 °, 10 ° etc..It is humorous tooth socket can be effectively reduced in this way
Wave is further able to achieve the effect that reduce tooth socket loss.
Preferably, each permanent magnet 10 respectively include multiple shapes just as permanent magnet unit 12 and be arranged adjacent
Insulating concrete mica plate 14 (as shown in Figure 5) in gap 13 between two permanent magnet units.
Specifically, permanent magnet is divided into the identical permanent magnet of six shapes along axis direction, and in the interposition of axis direction
Placement location insulating concrete mica plate 14, can greatly reduce the eddy-current loss of permanent magnet generation in this way, and the whirlpool that it can be made to generate
Stream loss distribution is more uniform, reduces the calorific value of permanent magnet, irreversible demagnetization phenomenon occurs to prevent permanent magnet, improve forever
Magnet service life and electric efficiency.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (7)
1. a kind of high-speed permanent magnetic body synchronous motor rotor structure, which is characterized in that the high-speed permanent magnetic body synchronous electric motor rotor knot
Structure includes rotor subject and the multipole permanent magnet pole being arranged on the rotor subject,
Wherein, each permanent magnet pole respectively includes multiple permanent magnets, and the cross section of each permanent magnet is fillet isosceles ladder
Shape；Circumferential annular is provided with shape, quantity with the matched embedding groove of permanent magnet on the rotor subject, and each embedding groove uses
In the accommodating permanent magnet, and the thickness of the magnetic bridge in the permanent magnet pole of every pole between two adjacent permanent magnets is apart from rotor master
The thickness of close one end in axle center of body is more than the thickness of one end remote apart from the axle center of rotor subject.
2. high-speed permanent magnetic body synchronous motor rotor structure according to claim 1, which is characterized in that in the rotor subject
The material of the epitaxial part of embedding groove is silicon steel sheet.
3. high-speed permanent magnetic body synchronous motor rotor structure according to claim 1, which is characterized in that each permanent magnet exists
There is the skewed slot at setting angle of inclination along axis direction.
4. high-speed permanent magnetic body synchronous motor rotor structure according to claim 3, which is characterized in that the setting inclination angle
Degree is 7.5 °.
5. high-speed permanent magnetic body synchronous motor rotor structure according to claim 1, which is characterized in that each permanent magnet with
Using interference fit between the rotor subject.
6. high-speed permanent magnetic body synchronous motor rotor structure according to any one of claims 1-5, which is characterized in that each institute
State permanent magnet respectively include multiple shapes just as permanent magnet unit and between being arranged between two adjacent permanent magnets unit
Insulating concrete mica plate in gap.
7. high-speed permanent magnetic body synchronous motor rotor structure according to claim 6, which is characterized in that in each permanent magnet
The quantity of permanent magnet unit is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193575.8A CN108321950A (en) | 2018-03-09 | 2018-03-09 | A kind of high-speed permanent magnetic body synchronous motor rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193575.8A CN108321950A (en) | 2018-03-09 | 2018-03-09 | A kind of high-speed permanent magnetic body synchronous motor rotor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108321950A true CN108321950A (en) | 2018-07-24 |
Family
ID=62901491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810193575.8A Pending CN108321950A (en) | 2018-03-09 | 2018-03-09 | A kind of high-speed permanent magnetic body synchronous motor rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108321950A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000078784A (en) * | 1998-09-01 | 2000-03-14 | Fujitsu General Ltd | Permanent magnet electric motor |
| JP2000324736A (en) * | 1999-05-12 | 2000-11-24 | Mitsubishi Electric Corp | Permanent magnet mounted motor |
| CN102163897A (en) * | 2011-04-21 | 2011-08-24 | 上海中科深江电动车辆有限公司 | Permanent magnetic synchronous motor structure |
| CN204271774U (en) * | 2014-08-04 | 2015-04-15 | 北京超同步伺服股份有限公司 | A kind of high-speed permanent magnetic electro spindle inner electric machine rotor punching structure |
| CN104868624A (en) * | 2015-03-30 | 2015-08-26 | 沈阳化工大学 | High-speed permanent-magnet motor rotor with layered permanent magnet structure |
| CN207868887U (en) * | 2018-03-09 | 2018-09-14 | 哈尔滨理工大学 | A kind of high-speed permanent magnetic body synchronous motor rotor structure |
-
2018
- 2018-03-09 CN CN201810193575.8A patent/CN108321950A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000078784A (en) * | 1998-09-01 | 2000-03-14 | Fujitsu General Ltd | Permanent magnet electric motor |
| JP2000324736A (en) * | 1999-05-12 | 2000-11-24 | Mitsubishi Electric Corp | Permanent magnet mounted motor |
| CN102163897A (en) * | 2011-04-21 | 2011-08-24 | 上海中科深江电动车辆有限公司 | Permanent magnetic synchronous motor structure |
| CN204271774U (en) * | 2014-08-04 | 2015-04-15 | 北京超同步伺服股份有限公司 | A kind of high-speed permanent magnetic electro spindle inner electric machine rotor punching structure |
| CN104868624A (en) * | 2015-03-30 | 2015-08-26 | 沈阳化工大学 | High-speed permanent-magnet motor rotor with layered permanent magnet structure |
| CN207868887U (en) * | 2018-03-09 | 2018-09-14 | 哈尔滨理工大学 | A kind of high-speed permanent magnetic body synchronous motor rotor structure |
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