CN201887636U - BLDCM rotor - Google Patents
BLDCM rotor Download PDFInfo
- Publication number
- CN201887636U CN201887636U CN2010206992686U CN201020699268U CN201887636U CN 201887636 U CN201887636 U CN 201887636U CN 2010206992686 U CN2010206992686 U CN 2010206992686U CN 201020699268 U CN201020699268 U CN 201020699268U CN 201887636 U CN201887636 U CN 201887636U
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- Prior art keywords
- rotor core
- permanent magnet
- rotor
- brushless
- rotating shaft
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a BLDCM (Brushless Direct Current Motor) rotor, which comprises a rotor core, a rotating shaft and permanent magnets, wherein the rotor core is formed by overlying and connecting punchings together; the rotating shaft is fixedly connected with the rotor core; an even number of T-shaped wedge blocks are uniformly distributed on the outer surface of the rotor core; slots are formed between the adjacent T-shaped wedge blocks; and the permanent magnets are correspondingly embedded into the slots, each permanent magnet is a double-arc tile-shaped body with a thicker middle and two thinner ends, the middle of the permanent magnet and the excircle of the T-shaped wedge block are positioned on a rotation circumference of the rotor core, and a downward concave part is formed between the middle of the permanent magnet and the adjacent T-shaped wedge blocks, so as to enable a non-uniform air gap to be formed between the rotor and a stator. The BLDCM rotor has the benefit that the main pole waveform of the magnetic field adopts sine wave distribution, and has the advantages of small harmonic wave of the induced electromotive force, low noise, small pulsation and high efficiency.
Description
Technical field
The utility model relates to a kind of brshless DC motor, relates in particular to a kind of brushless DC motor rotor.
Background technology
At present, brshless DC motor has been widely used in various occasions, it also is one of critical component of electric motor car, the rotor structure and the manufacturing process of brshless DC motor also are not quite similar, comparatively common is permanent magnet embedded structure, with the comparatively approaching prior art of the utility model the patent No. being arranged is ZL200920116549.1, name is called the utility model patent of " brushless DC motor rotor ", this patent disclosure following technical scheme: comprise rotor core, rotating shaft and permanent magnet, rotor core is made up of the punching stack and is fused, rotating shaft is fixedlyed connected with rotor core, its inventive point is: the outer surface of rotor core is evenly distributed with even number T shape voussoir, constitute slot between the adjacent T shape voussoir, the permanent magnet correspondence is embedded in this slot.This technical scheme technical problem to be solved is to prevent that permanent magnet from coming off.Also having the patent No. with the comparatively approaching prior art of the utility model is ZL200620107918.7, title also is the utility model patent of " brushless DC motor rotor ", this patent disclosure following technical scheme: comprise rotor core, rotating shaft and permanent magnet, rotor core is made up of the punching stack and is fixedlyed connected with rotating shaft, its inventive point is: the outer surface of rotor core is evenly distributed with the trapezoidal wedge groove of even number, and permanent magnet is arranged in the trapezoidal wedge groove that is complementary with it; Rotor core between the described two adjacent trapezoidal wedge grooves is provided with circular groove, and the latch of interference fit is set on the circular groove.This technical scheme technical problem to be solved also is to prevent that permanent magnet from coming off, and the effect of latch is the swelling permanent magnet.But form even air gap between the rotor of above-mentioned two technical schemes and the stator, its magnetic field main pole waveform is square wave and distributes, and has that the induced electromotive force harmonic wave is big, noise and big, an inefficient shortcoming of pulsation; In addition, permanent magnet is an isocentric circular arc watt shape body, has the shortcoming of waste of material during cutting processing.
Summary of the invention
Technical problem to be solved in the utility model overcomes the deficiencies in the prior art exactly, provides a kind of main pole waveform for sinusoidal wave, and the induced electromotive force harmonic wave is little, noise and pulsation is little, efficient is high brushless DC motor rotor.
The technical scheme that the utility model adopted is: a kind of brushless DC motor rotor, comprise rotor core, rotating shaft and permanent magnet, rotor core is made up of the punching stack and is fused, rotating shaft is fixedlyed connected with rotor core, the outer surface of rotor core is evenly distributed with even number T shape voussoir, constitute slot between the adjacent T shape voussoir, the permanent magnet correspondence is embedded in this slot, permanent magnet is a thick middle, two arcs watt shape body that two ends are thin slightly, the cylindrical portion of the pars intermedia of permanent magnet and T shape voussoir is positioned on the rotation round of rotor core, constitutes lower concave part between the pars intermedia of permanent magnet and the adjacent T shape voussoir, makes and forms non-homogeneous air gap between rotor and the stator.
As further improvement, on T shape voussoir, offer circular groove, be provided with on the circular groove interference fit by nonmagnetic substance make every needle.
Permanent magnet is for waiting segmental tile shape body.
Two ends at rotor core are provided with baffle plate, are provided with several through holes on rotor core and baffle plate, are provided with the fixedly riveted joint aluminium bar of usefulness in through hole.
The two ends that the riveted joint aluminium bar stretches out baffle plate are made as air-cooled blade.
The utility model beneficial technical effects is: first, owing to constitute lower concave part between the pars intermedia of permanent magnet and the adjacent T shape voussoir, make and form non-homogeneous air gap between rotor and the stator, the main pole waveform in magnetic field is distributed for sinusoidal wave, thereby, have that the induced electromotive force harmonic wave is little, noise and pulsation is little, efficient is a high advantage.The second, be arranged on the T shape voussoir every needle, further play the effect that reduces leakage field, reduces the wastage, raises the efficiency.The 3rd, permanent magnet is made as center of circle difference, the body such as shape such as segmental tile such as grade that radius is identical, and more identical than the center of circle when cutting processing, the different isocentric circular arc watt shape body of radius is saved the permanent magnetism rare earth material more, and stock utilization can improve more than 14.3%.The 4th, adopt riveted joint aluminium bar fixed rotor iron core and baffle plate, help strengthening dynamic balancing, alleviate rotor quality; The two ends that the riveted joint aluminium bar stretches out baffle plate are made as air-cooled blade, can form fan inside motor is effectively cooled off.
Description of drawings
Fig. 1: be the structural representation of rotor core of the present utility model;
Fig. 2: be structural representation of the present utility model;
Fig. 3: be the processing clout figure of isocentric circular arc watt shape body permanent magnet;
Fig. 4: for waiting processing clout figure of segmental tile shape body permanent magnet.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
As illustrated in fig. 1 and 2, a kind of brushless DC motor rotor, comprise rotor core 1, rotating shaft 2 and permanent magnet 3, rotor core 1 is made up of punching 4 stacks and is fused, rotating shaft 2 is fixedlyed connected with rotor core 1, the outer surface of rotor core 1 is evenly distributed with even number T shape voussoir 5, constitute slot between the adjacent T shape voussoir 5, permanent magnet 3 correspondences are embedded in this slot, permanent magnet 3 is a thick middle, two arcs watt shape body that two ends are thin slightly, the pars intermedia 6 of permanent magnet 3 is positioned on the rotation round of rotor core 1 with the cylindrical portion 7 of T shape voussoir 5, constitute lower concave part 8 between the pars intermedia 6 of permanent magnet 3 and the adjacent T shape voussoir 5, make the non-homogeneous air gap 10 of formation between rotor and the stator 9.On T shape voussoir 5, offer circular groove 11, be provided with on the circular groove 11 interference fit by nonmagnetic substance make every needle 12, the making for stainless steel material of present embodiment every needle 12.In order to save material, permanent magnet 3 such as is made as at segmental tile shape body.Be provided with baffle plate 13 at the two ends of rotor core 1, on rotor core 1 and baffle plate 13, be provided with several through holes 14, in through hole 14, be provided with the fixedly riveted joint aluminium bar 15 of usefulness.The two ends that riveted joint aluminium bar 15 stretches out baffle plate 13 are made as air-cooled blade 16.
As shown in Figure 3, there is the material of waste in the cutting processing clout figure the when permanent magnet of prior art is isocentric circular arc watt shape body between the adjacent permanent magnet.
As shown in Figure 4, permanent magnet 3 is the cutting processing clout figure when waiting segmental tile shape body, does not have the material of waste between the adjacent permanent magnet.
Claims (5)
1. brushless DC motor rotor, comprise rotor core, rotating shaft and permanent magnet, rotor core is made up of the punching stack and is fused, rotating shaft is fixedlyed connected with rotor core, the outer surface of rotor core is evenly distributed with even number T shape voussoir, constitute slot between the adjacent T shape voussoir, the permanent magnet correspondence is embedded in this slot, it is characterized in that: permanent magnet is a thick middle, two arcs watt shape body that two ends are thin slightly, the cylindrical portion of the pars intermedia of permanent magnet and T shape voussoir is positioned on the rotation round of rotor core, constitutes lower concave part between the pars intermedia of permanent magnet and the adjacent T shape voussoir, makes and forms non-homogeneous air gap between rotor and the stator.
2. a kind of brushless DC motor rotor according to claim 1 is characterized in that: on T shape voussoir, offer circular groove, be provided with on the circular groove interference fit by nonmagnetic substance make every needle.
3. a kind of brushless DC motor rotor according to claim 1 and 2 is characterized in that: permanent magnet is for waiting segmental tile shape body.
4. a kind of brushless DC motor rotor according to claim 1 and 2 is characterized in that: the two ends at rotor core are provided with baffle plate, are provided with several through holes on rotor core and baffle plate, are provided with the fixedly riveted joint aluminium bar of usefulness in through hole.
5. a kind of brushless DC motor rotor according to claim 4 is characterized in that: the two ends that the riveted joint aluminium bar stretches out baffle plate are made as air-cooled blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206992686U CN201887636U (en) | 2010-12-24 | 2010-12-24 | BLDCM rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206992686U CN201887636U (en) | 2010-12-24 | 2010-12-24 | BLDCM rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201887636U true CN201887636U (en) | 2011-06-29 |
Family
ID=44185182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206992686U Expired - Lifetime CN201887636U (en) | 2010-12-24 | 2010-12-24 | BLDCM rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201887636U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035336A (en) * | 2010-12-24 | 2011-04-27 | 汇润机电有限公司 | Brushless direct current motor rotor |
| CN103683585A (en) * | 2012-08-30 | 2014-03-26 | 北京超同步科技有限公司 | Permanent magnet motor rotor |
| CN104753213A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent-magnet DC brushless motor |
-
2010
- 2010-12-24 CN CN2010206992686U patent/CN201887636U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035336A (en) * | 2010-12-24 | 2011-04-27 | 汇润机电有限公司 | Brushless direct current motor rotor |
| CN103683585A (en) * | 2012-08-30 | 2014-03-26 | 北京超同步科技有限公司 | Permanent magnet motor rotor |
| CN104753213A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent-magnet DC brushless motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |
|
| CX01 | Expiry of patent term |