CN208423975U - A kind of eccentric rotor magnetic shoe device - Google Patents
A kind of eccentric rotor magnetic shoe device Download PDFInfo
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- CN208423975U CN208423975U CN201821035444.9U CN201821035444U CN208423975U CN 208423975 U CN208423975 U CN 208423975U CN 201821035444 U CN201821035444 U CN 201821035444U CN 208423975 U CN208423975 U CN 208423975U
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Abstract
A kind of eccentric rotor magnetic shoe device disclosed by the utility model, is related to technical field of motor manufacture, uniformly inlays the rotor magnetic shoe on rotor block periphery including stator core, rotor and muti-piece；The external arc in the rotor magnetic shoe section is made of (2n+1) section circular arc, wherein: the arc section on both sides is using the middle line of interlude circular arc as symmetry axis, it is symmetrically the same, and the arc section concentric of both sides opposite position two-by-two, and misplace with the center of circle of other arc sections；The interlude circular arc and stator core inner arc surface are concentric；The n be natural number 1,2,3 ....Have the characteristics that motor oscillating and noise can be reduced, is suitable for matching with permanent magnet synchronous motor.
Description
Technical field
The utility model relates to technical field of motor manufacture, especially a kind of eccentric rotor magnetic shoe device.
Background technique
For durface mounted permanent magnet synchronous motor, rotor magnetic steel is usually uniform thickness tile-type, and air-gap field non-sine is distributed,
But it is similar to trapezoidal wave.To improve air-gap field sine, the utility model proposes a kind of eccentric magnetic shoe structures.
Disclosed in Chinese patent (application number 201120273912.8) " a kind of noise reduction off-centre operation cambered surface motor magnetic tile ", packet
Arch matrix is included, the extrados and intrados of the arch matrix are off-centre operation cambered surface, the sagitta of arch base bottom two side ends
Face is horizontal, and side and the radial central axes of arch matrix are parallel to each other, and sagitta face is mutually perpendicular to side.
Disclosed in another Chinese patent (application number 201220176958.2) " motor magnetic tile ", the magnetic shoe includes six
Face is intrados, extrados, left side, right side, front end face and rear end face respectively, and intrados is coaxial with extrados, the left side
The extended surface of side and right side intersects on the outside of extrados, which extend the left and right side of magnetic shoe to two sides, with other
It influences each other between the magnetic field of magnetic shoe, forms more optimal magnetic field, be conducive to extend the service life of magnetic shoe, in addition, this
The side of structure is oblique outer, and usable dovetail groove is fixed, and the dismounting of rotor is also more favorable for.
There are also disclosed in Chinese patent (application number 201510023130.1) " a kind of eccentric motor magnetic shoe ", it includes motor
Magnetic shoe ontology (1), motor magnetic tile ontology (1) the interior arc radius (A) is less than outer arc radius (B), and the inner arc center of circle and outer arc
Center of circle spacing (C) is 0.1-0.8mm.Its structure is simple, and inner arc and outer arc use eccentric structure, increase outer arc area, and
Magnetic flux is added, has led to and increase the stress intensity of magnetic shoe, so that magnetic shoe is not easily broken.
It is disclosed " a kind of novel eccentric magnetic shoe " that there are also Chinese patents (application number 201621295090.2), including iron plate,
The first magnet, the second magnet, filler and skeleton are enclosed in the iron plate.Beneficial effect is: motor is novel partially using this
After heart magnetic shoe makees stator, with it is traditional the motor of stator is made using uniform thickness magnetic shoe compared with, motor noise is small, and commutation is steady, commutation
Spark is small, long service life.
Although the above-mentioned eccentric magnetic shoe structure of patent proposition, in all magnetic shoe structures, external arc is one section of circular arc,
Although can improve air-gap field sinusoidal pattern, air gap flux density amplitude is substantially reduced, and influences motor power output.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of rotor magnetic shoes that can reduce motor oscillating and noise
Device.
To achieve the above object, technical solution adopted in the utility model is to design a kind of eccentric rotor magnetic shoe device:
The rotor magnetic shoe on rotor block periphery is uniformly inlayed including stator core, rotor and muti-piece；Outside the rotor magnetic shoe section
Circular arc is made of (2n+1) section circular arc, in which: and the arc section on both sides is symmetrically the same using the middle line of interlude circular arc as symmetry axis,
And the arc section concentric of both sides opposite position two-by-two, and misplace with the center of circle of other arc sections；The interlude circular arc
It is concentric with stator core inner arc surface；The n be natural number 1,2,3 ....
The radius of the arc section is gradually increased from edge to centre.
The external arc in rotor magnetic shoe section, is separated into three sections or more of list by the eccentric rotor magnetic shoe device of the utility model
The center of circle of several sections of circular arcs, several sections of circular arcs forms dislocation；Due to the circular arc of center of circle dislocation, in-between convex, inward at both ends are recessed, because
And ascending, descending non-uniform gap again is formed between the inner hole wall surface of stator, so that the diameter of motor
Sine to electromagnetic force is preferable, while low order radial electromagnetic force reduces, to reduce vibration and the noise of motor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the upper half of the utility model；
Fig. 2 is the enlarged diagram of the rotor magnetic shoe of the utility model.
In figure:
1 is stator core, and 2 be rotor, and 3 be circular arc one (that is: c-d sections), and 4 be circular arc two (that is: b-c sections), and 5 be stator iron
In-core diameter arc surface, 6 be circular arc three (that is: b-a sections), and 7 be rotor magnetic shoe；
R is the radius of circular arc one and circular arc three, and R1 is the radius of circular arc two, and L is the semidiameter of adjacent two circular arc.
Specific embodiment
Below in conjunction with drawings and examples, the utility model is further described.Following explanation is to use to enumerate
Mode, but the protection scope of the utility model should not be limited to thoses mentioned above.
The eccentric rotor magnetic shoe device of the present embodiment is made of stator core 1, rotor magnetic shoe 7 and rotor 2.In rotor 2
Periphery on be uniformly inlaid with ten pieces of (this example is set as ten pieces, can also be other quantity) rotor magnetic shoes 7.Rotor magnetic shoe 7
The external arc in section is made of three sections (this example is set as three sections, can also be other singular sections), in which: the circular arc 1 on the left side with
The circular arc 36 on the right is symmetrically the same and concentric (when the external arc in the section of rotor magnetic shoe 7 is constituted by five sections, a left side therein
One with a right symmetrically the same and concentric, the second from left and right two symmetrically the same and concentrics, and so on)；Intermediate circular arc 24
It is concentric with stator core inner arc surface 5.
The circular arc 1 on the left side and the radius of circular arc 36 on the right are identical, less than intermediate circular arc 24 radius (similarly,
When the external arc in the section of rotor magnetic shoe 7 is constituted by five sections, the first from left therein is identical as the radius on the right side one, is less than the second from left and the right side
Two radius, and so on).To so that the section of rotor magnetic shoe 7 is in " steamed bun type " shape.Specifically, one (that is: d- of circular arc
C sections) radius be R, with central coordinate of circle for (0, L), the coordinate of circular arc starting point c is (- R1 × sin α, R1 × cos α), and terminal is sat
It is designated as d and draws circular arc；The arc radius of circular arc 24 (that is: b-c sections) be R1, with the center of circle (that is: the central spindle of rotor 2) coordinate (0,
0), the coordinate of circular arc starting point b is (R1 × sin α, R1 × cos α), and circular arc terminal point coordinate c is that (- R1 × sin α, R1 × cos α) is drawn
Rounding arc；The radius of circular arc 36 (that is: b-a sections) is R, and with central coordinate of circle for (0, L), the coordinate of circular arc starting point b is (R1 × sin
α, R1 × cos α), terminal point coordinate is that a draws circular arc.The relationship of above-mentioned each parameter is R=R1-L.
Before use, rotor magnetic shoe 7 is uniformly pasted on the outer surface of rotor 2.Due to several external arcs of rotor magnetic shoe 7
The center of circle in (face) forms dislocation, so the periphery of rotor magnetic shoe 7 collectively forms the rotor outer circle face risen and fallen regularly.Thus, turn
Sub- periphery and stator core inner hole (that is: stator core inner arc surface 5) are formed ascending, descending unevenness again
Even air gap.
In use process, the air gap between the stator core inner arc surface 5 and rotor outer circle face of stator core 1 is via by small
Change to big, descending again repetition, air gap flux density sinusoidal pattern is improved, to reduce motor oscillating and noise.
The eccentric rotor magnetic shoe device of the utility model, is suitable for matching with permanent magnet synchronous motor.
Claims (2)
1. a kind of eccentric rotor magnetic shoe device is uniformly inlayed including stator core, rotor and muti-piece and is turned on rotor block periphery
Sub- magnetic shoe, it is characterised in that: the external arc in the rotor magnetic shoe section is made of 2n+1 sections of circular arcs, in which: the arc section on both sides
It is symmetrically the same using the middle line of interlude circular arc as symmetry axis, and the arc section concentric of both sides opposite position two-by-two, and with
The center of circle of other arc sections misplaces；The interlude circular arc and stator core inner arc surface are concentric；The n be natural number 1,2,
3、……。
2. eccentric rotor magnetic shoe device according to claim 1, it is characterised in that: the radius of the arc section from edge to
Centre is gradually increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821035444.9U CN208423975U (en) | 2018-07-02 | 2018-07-02 | A kind of eccentric rotor magnetic shoe device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821035444.9U CN208423975U (en) | 2018-07-02 | 2018-07-02 | A kind of eccentric rotor magnetic shoe device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208423975U true CN208423975U (en) | 2019-01-22 |
Family
ID=65106065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821035444.9U Active CN208423975U (en) | 2018-07-02 | 2018-07-02 | A kind of eccentric rotor magnetic shoe device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208423975U (en) |
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2018
- 2018-07-02 CN CN201821035444.9U patent/CN208423975U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 426181 Yongzhou city of Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee after: Collier Electric Machinery Group Co., Ltd. Address before: 426181 Yongzhou city of Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee before: Hunan Kelier motor Limited by Share Ltd |