CN207868887U - 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
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- CN207868887U CN207868887U CN201820324668.5U CN201820324668U CN207868887U CN 207868887 U CN207868887 U CN 207868887U CN 201820324668 U CN201820324668 U CN 201820324668U CN 207868887 U CN207868887 U CN 207868887U
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- permanent magnet
- magnetic body
- permanent
- synchronous motor
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Abstract
The utility model 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.The utility model high-speed permanent magnetic body synchronous motor rotor structure 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 when rotating at high speed can be improved.
Description
Technical field
The utility model is related 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 purpose of this utility model is to provide a kind of high-speed permanent magnetic body synchronous motor rotor structure, and tensile strength can be improved.
To achieve the above object, the utility model provides following scheme：
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 includes the identical permanent magnet unit of multiple shapes and is 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 utility model, the utility model discloses following technique effects：
The utility model high-speed permanent magnetic body synchronous motor rotor structure by a monoblock permanent magnet pole by being divided into multiple permanent magnetism
Body is uniformly arranged on rotor subject, has certain thickness magnetic bridge between two adjacent permanent magnets in the permanent magnet pole of every pole,
The tensile stress that each permanent magnet is subject to when rotating at high speed is far smaller than the drawing that a monoblock permanent magnet pole is subject in the prior art and answers
Power, to which the tensile strength of the utility model high-speed permanent magnetic body synchronous motor rotor structure when rotating at high speed can be improved.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without having to pay creative labor, can also basis
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 the utility model embodiment high-speed permanent magnetic body synchronous motor rotor structure；
Fig. 4 is the structure chart of the permanent magnet pole of the utility model embodiment high-speed permanent magnetic body synchronous motor rotor structure；
Fig. 5 is the permanent magnetism body axis direction structure chart of the utility model embodiment；
Fig. 6 is the nodal force cloud atlas that the fillet isosceles trapezoid permanent magnet of the utility model embodiment is subject to；
Fig. 7 is the nodal force oscillogram that the fillet isosceles trapezoid permanent magnet of the utility model embodiment 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
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The purpose of this utility model is to provide a kind of high-speed permanent magnetic body synchronous motor rotor structure, by by a monoblock permanent magnetism
Body pole is divided into multiple permanent magnets and is uniformly arranged on rotor subject, has one between two adjacent permanent magnets in the permanent magnet pole of every pole
Determine the magnetic bridge of thickness, the tensile stress that each permanent magnet is subject to when rotating at high speed is far smaller than a monoblock permanent magnetism in the prior art
The tensile stress that body pole is subject to, to which the utility model high-speed permanent magnetic body synchronous motor rotor structure can be improved when rotating at high speed
Tensile strength.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings and have
Body embodiment is described in further detail the utility model.
Exist as shown in figure 3, the utility model high-speed permanent magnetic body synchronous motor rotor structure includes rotor subject 2 and setting
Multipole permanent magnet pole 1 on the rotor subject 2.Wherein, each permanent magnet pole 1 respectively includes multiple permanent magnets 10（Such as Fig. 3
Shown in Fig. 4）, and the cross section of each permanent magnet is fillet isosceles trapezoid；Circumferential annular is provided 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 magnetism
The thickness of magnetic bridge 11 between the extremely middle two adjacent permanent magnets of body is that the thickness of one end close apart from the axle center of rotor subject 2 is big
Thickness in 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 of the rotor subject 2（Including embedding groove and epitaxial part）For
It is integrally formed.
In assembly, due to permanent magnet to rotor edge（That is 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 the utility model high-speed permanent magnetic body synchronous motor
Rotor structure has enough intensity when rotating at high speed.
In the utility model high-speed permanent magnetic body synchronous motor rotor structure, permanent magnet is arranged to fillet isosceles trapezoid, this
Sample, which is compared, to be arranged to the benefit of traditional isosceles trapezoid permanent magnet that circular arc is not processed at four angles and is, when rotating at high speed, respectively
The nodal force smaller that permanent magnet 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 that the utility model embodiment fillet isosceles trapezoid permanent magnet is subject to respectively
Power oscillogram, Fig. 8, Fig. 9 are the nodal force cloud that four angles are not processed into that traditional isosceles trapezoid permanent magnet of circular arc is subject to respectively
Figure and 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
For 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
The nodal force arrived is not concentrated, 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 includes the identical permanent magnet unit 12 of multiple shapes and is arranged adjacent
The insulating concrete mica plate 14 in gap 13 between two permanent magnet units（As shown in Figure 5）.
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.
Specific case used herein is expounded the principles of the present invention and embodiment, above example
Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field
Personnel, according to the thought of the utility model, there will be changes in the specific implementation manner and application range.In conclusion
The content of the present specification should not be construed as a 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
It states between permanent magnet respectively includes the identical permanent magnet unit of multiple shapes and be 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 |
|---|---|---|---|
| CN201820324668.5U CN207868887U (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 |
|---|---|---|---|
| CN201820324668.5U CN207868887U (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 |
|---|---|
| CN207868887U true CN207868887U (en) | 2018-09-14 |
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|---|---|---|---|
| CN201820324668.5U Expired - Fee Related CN207868887U (en) | 2018-03-09 | 2018-03-09 | A kind of high-speed permanent magnetic body synchronous motor rotor structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321950A (en) * | 2018-03-09 | 2018-07-24 | 哈尔滨理工大学 | A kind of high-speed permanent magnetic body synchronous motor rotor structure |
-
2018
- 2018-03-09 CN CN201820324668.5U patent/CN207868887U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321950A (en) * | 2018-03-09 | 2018-07-24 | 哈尔滨理工大学 | A kind of high-speed permanent magnetic body synchronous motor rotor structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180914 Termination date: 20190309 |
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| CF01 | Termination of patent right due to non-payment of annual fee |