CN103532332A - Ultra-silence permanent-magnet brushless DC (direct-current) motor - Google Patents
Ultra-silence permanent-magnet brushless DC (direct-current) motor Download PDFInfo
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- CN103532332A CN103532332A CN201310522386.8A CN201310522386A CN103532332A CN 103532332 A CN103532332 A CN 103532332A CN 201310522386 A CN201310522386 A CN 201310522386A CN 103532332 A CN103532332 A CN 103532332A
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Abstract
The invention discloses an ultra-silence permanent-magnet brushless DC motor which comprises a stator core and a rotor core, wherein the rotor core is movably arranged in the center of the stator core; a permanent magnet is arranged between the rotor core and the stator core; the rotor core is fixedly connected with a rotating shaft through a silicone rubber sealing ring, and under the driving of the rotating shaft, the rotor core rotates in the center of the stator core; and the rotor core comprises a yoke part with magnetic permeability, and connection holes used for connecting the rotating shaft are formed in the center of the yoke part. According to the ultra-silence permanent-magnet brushless DC motor, the rotor core and the rotating shaft are connected through the silicone rubber sealing ring, so that the motor adopting the structure is low in noise, high in efficiency and capable of meeting environment protection and energy conservation requirements of the motor industry. Specifically, the efficiency of the motor which is made of the same material and has the same cost is 2% higher than that of a conventional motor, and the noise is reduced by 2-4 dB of the original noise.
Description
Technical field
The present invention relates to a kind of DC motor, be specifically related to a kind of super-silent brushless, permanently excited direct current motor.
Background technology
Existing brushless, permanently excited direct current motor as shown in Figure 1, comprises stator core 1, rotor core 2, and rotor core 2 is movably set in the center of stator core 1; Between rotor core 2 and stator core 1, be provided with permanent magnet 3; Rotor core 2 under the drive of central shaft 4 at the central rotation of stator core 1.
The noise of this brushless, permanently excited direct current motor is larger, and efficiency is lower.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of super-silent brushless, permanently excited direct current motor, and it can improve the efficiency of motor, reduces the noise in the course of work.
For solving the problems of the technologies described above, the technical solution of the super-silent brushless, permanently excited direct current motor of the present invention is:
Comprise stator core, rotor core, rotor core is movably set in the center of stator core; Between rotor core and stator core, be provided with permanent magnet; Rotor core is fixedly connected with rotating shaft by silicone rubber O-ring, rotor core under the drive of rotating shaft at the central rotation of stator core; Described rotor core comprises that the ，E Bu of the yoke portion center that possesses high magnetic conduction offers the connecting hole for connection rotating shaft; Yoke portion is octagon, and connecting hole matches with the profile of silicone rubber O-ring.
The inner ring of described stator core forms a plurality of stator tooths, between adjacent stator tooth, forms stator slot; The formed air gap of stator slot outwards reduces, thereby can make full use of the equilibratory radial pull of leakage field.
Described stator core is combined with rotor core, and the magnetic field that stator winding electrifying produces and the magnetic field of permanent magnet are synthetic, and a part of magnetic field produces motor gas-gap magnetic flux density; Part leakage field produces leakage field power in conjunction with the induction conductive current of permanent magnet self, and after energising, leakage field is made every effort to overcome and taken rotor gravity and rotor is suspended rotate, thereby reduces the friction between rotating shaft and bearing, reduces mechanical loss and mechanicalness noise.
The technique effect that the present invention can reach is:
Between rotor core of the present invention and rotating shaft, adopt silicone rubber O-ring to be connected, make the motor noise of this structure low, efficiency is high, can meet the requirement of electromechanics trade environmental protection and energy saving.Specifically, adopt the electric efficiency of equivalent material cost higher by 2% than conventional efficiency, noise is than the original 2～4dB that reduces.
It is synthetic that the present invention can make full use of motor-field passage is smooth and easy, magnetic field produces magnetomotive force and magnetic pull, can improve the effective power density of motor, thereby improve the efficiency of motor; Apply leakage field energy simultaneously, allow the equilibratory radially magnetic pull of leakage field, make the rotor rotation that suspends as far as possible, thereby reduce mechanical oscillation and noise.
The present invention has the stator of grooved, rotor yoke structure, the output shaft structure that is flexible coupling and the leakage field utility of the poly-high magnetic conduction of magnetic by setting, can improve air gap flux density, thereby reduces mechanical loss, vibration and the noise of output shaft.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the schematic diagram of existing brushless, permanently excited direct current motor;
Fig. 2 is the schematic diagram of the super-silent brushless, permanently excited direct current motor of the present invention;
Fig. 3 is the schematic diagram of rotor core of the present invention;
Fig. 4 is the schematic diagram that rotor core of the present invention is connected with rotating shaft;
Fig. 5 is the schematic diagram of stator core of the present invention.
Description of reference numerals in figure:
1 is stator core, and 2 is rotor core,
3 is permanent magnet, axle centered by 4,
5 is rotating shaft, and 6 is silicone rubber O-ring,
11 is yoke portion, and 12 is connecting hole,
101 is stator tooth.
Embodiment
As shown in Figure 2, the super-silent brushless, permanently excited direct current motor of the present invention, comprises stator core 1, rotor core 2, and rotor core 2 is movably set in the center of stator core 1; Between rotor core 2 and stator core 1, be provided with permanent magnet 3;
As shown in Figure 3, rotor core 2 comprises the yoke portion 11 that possesses high magnetic conduction, and yoke Bu11 center offers the connecting hole 12 for connection rotating shaft 5; Yoke portion 11 is octagon, and connecting hole 12 matches with the profile of silicone rubber O-ring 6.
As shown in Figure 4, the connecting hole 12 of rotor core 2 passes through silicone rubber O-ring 6 connection rotating shafts 5, thereby realizes being flexible coupling between connecting hole 12 and rotating shaft 5.
As shown in Figure 5, the inner ring of stator core 1 forms a plurality of stator tooths 101, between adjacent stator tooth 101, forms stator slot; The formed air gap of stator slot outwards reduces, thereby can make full use of the equilibratory radial pull of leakage field.
Rotor core of the present invention possesses the yoke portion of the high magnetic conduction of poly-magnetic, can reduce leakage field, improves air gap flux density, thereby improves electric efficiency.
The connecting hole of rotor core of the present invention is the inner hole structure of axle of being flexible coupling, and facilitates silicon rubber contact bonding, can improve intensity and toughness that rotor core is connected with silicon rubber, guarantees motor breakdown torque promotion load torque, guarantees that motor normally moves.
Between rotor core of the present invention and rotating shaft, adopt silicon rubber to be connected, the pliability by rubber with eliminate that air-gap field produces to axle radial load, reduce the vibration between metal, reduce the noise of motor output.
The motor tooth of stator core of the present invention is outwards reduced by air gap, stator core is in conjunction with rotor core, the magnetic field that permanent-magnet brushless DC electric machine stator winding electrifying produces and the magnetic field of permanent magnet are synthetic, part magnetic field produces motor gas-gap magnetic flux density, can improve power density, thereby improve electric efficiency; Part leakage field produces leakage field power in conjunction with the induction conductive current of permanent magnet self, after energising, leakage field overcomes and may overcome rotor gravity rotor suspend to be rotated, thereby reduce the friction between rotating shaft and bearing, reduce mechanical loss and mechanicalness noise, further improve electric efficiency.
Claims (5)
1. a super-silent brushless, permanently excited direct current motor, is characterized in that: comprise stator core, rotor core, rotor core is movably set in the center of stator core; Between rotor core and stator core, be provided with permanent magnet; Rotor core is fixedly connected with rotating shaft by silicone rubber O-ring, rotor core under the drive of rotating shaft at the central rotation of stator core;
Described rotor core comprises that the ，E Bu of the yoke portion center that possesses high magnetic conduction offers the connecting hole for connection rotating shaft.
2. super-silent brushless, permanently excited direct current motor according to claim 1, is characterized in that: the inner ring of described stator core forms a plurality of stator tooths, between adjacent stator tooth, forms stator slot; The formed air gap of stator slot outwards reduces, thereby can make full use of the equilibratory radial pull of leakage field.
3. super-silent brushless, permanently excited direct current motor according to claim 1, is characterized in that: the yoke portion of described rotor core is octagon.
4. according to the super-silent brushless, permanently excited direct current motor described in claim 1 or 3, it is characterized in that: the connecting hole of described rotor core matches with the profile of silicone rubber O-ring.
5. super-silent brushless, permanently excited direct current motor according to claim 1, is characterized in that: described stator core is combined with rotor core, and the magnetic field that stator winding electrifying produces and the magnetic field of permanent magnet are synthetic, and a part of magnetic field produces motor gas-gap magnetic flux density; Part leakage field produces leakage field power in conjunction with the induction conductive current of permanent magnet self, and after energising, leakage field is made every effort to overcome and taken rotor gravity and rotor is suspended rotate, thereby reduces the friction between rotating shaft and bearing, reduces mechanical loss and mechanicalness noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522386.8A CN103532332A (en) | 2013-10-30 | 2013-10-30 | Ultra-silence permanent-magnet brushless DC (direct-current) motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522386.8A CN103532332A (en) | 2013-10-30 | 2013-10-30 | Ultra-silence permanent-magnet brushless DC (direct-current) motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103532332A true CN103532332A (en) | 2014-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310522386.8A Pending CN103532332A (en) | 2013-10-30 | 2013-10-30 | Ultra-silence permanent-magnet brushless DC (direct-current) motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108696003A (en) * | 2017-03-30 | 2018-10-23 | 福特全球技术公司 | The stator tooth of optimization for electric motor/generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090086940A (en) * | 2007-02-21 | 2009-08-14 | 미쓰비시덴키 가부시키가이샤 | Permanent magnet synchronous motor and enclosed compressor |
| CN101640442A (en) * | 2009-07-20 | 2010-02-03 | 陆美娟 | Permanent magnet generator rotor |
| CN202309274U (en) * | 2011-09-07 | 2012-07-04 | 佛山市威灵洗涤电机制造有限公司 | Motor with permanent magnetic rotor |
| CN103187843A (en) * | 2012-01-01 | 2013-07-03 | 东菱技术股份有限公司 | Halbach permanent magnet synchronous servo motor |
-
2013
- 2013-10-30 CN CN201310522386.8A patent/CN103532332A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090086940A (en) * | 2007-02-21 | 2009-08-14 | 미쓰비시덴키 가부시키가이샤 | Permanent magnet synchronous motor and enclosed compressor |
| CN101640442A (en) * | 2009-07-20 | 2010-02-03 | 陆美娟 | Permanent magnet generator rotor |
| CN202309274U (en) * | 2011-09-07 | 2012-07-04 | 佛山市威灵洗涤电机制造有限公司 | Motor with permanent magnetic rotor |
| CN103187843A (en) * | 2012-01-01 | 2013-07-03 | 东菱技术股份有限公司 | Halbach permanent magnet synchronous servo motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108696003A (en) * | 2017-03-30 | 2018-10-23 | 福特全球技术公司 | The stator tooth of optimization for electric motor/generator |
| CN108696003B (en) * | 2017-03-30 | 2022-07-19 | 福特全球技术公司 | Optimized stator teeth for electric motor/generator |
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Application publication date: 20140122 |