CN103346655A - Birotor permanent magnet motor and washing machine - Google Patents
Birotor permanent magnet motor and washing machine Download PDFInfo
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- CN103346655A CN103346655A CN2013102786654A CN201310278665A CN103346655A CN 103346655 A CN103346655 A CN 103346655A CN 2013102786654 A CN2013102786654 A CN 2013102786654A CN 201310278665 A CN201310278665 A CN 201310278665A CN 103346655 A CN103346655 A CN 103346655A
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Abstract
The invention provides a birotor permanent magnet motor and a washing machine with the same. The birotor permanent magnet motor comprises an inner rotor, a stator and an outer rotator which are sequentially arranged from inside to outside, and is characterized in that both the inner rotor and the outer rotor are permanent magnet rotors, and the stator comprises a magnetic modulation ring and a stator winding arranged on the magnetic modulation ring in a wound mode. The birotor permanent magnet motor is based on the magnetic field modulation principle and has a birotor structure, the outer rotor and the inner rotor can rotate according to certain proportional relation, and high-performance output of the motor under operating conditions of a low speed and a high speed can be met at the same time. When the birotor permanent magnet motor drives the washing machine to operate, not only are design requirements for low-speed large torque output and high-speed small torque output of the motor under the optimal operating state met, but also the structures of a belt pulley, a reduction gearbox and the like in a traditional washing machine are eliminated, transmission efficiency of the motor is improved, and meanwhile the defects of high noise, machine body vibration and the like of the traditional washing machine are overcome.
Description
Technical field
The present invention relates to technical field of motors, the washing machine that relates in particular to a kind of dual rotor permanent magnetic motor and have this dual rotor permanent magnetic motor.
Background technology
Washing machine is requisite household electrical appliance in people's daily life, its power consumption, and the vibrating noise size is to weigh a major criterion of washing machine quality.At present domestic monotubular single container washing and extracting machine commonly used are divided into two kinds of rotary drum washing machine and roller washing machines substantially, and its basic working modes mainly is divided into washing and dries two kinds.Usually under the washing operating mode, impeller (rotary drum washing machine) or cylinder (roller washing machine) rotating speed are lower, be 100～200r/min, and under the dehydration condition, the rotating speed of dehydration tube or cylinder are higher, usually at 1000r/min.Traditional washing machine drives the motors that adopt, low-speed big when reaching washing by belt pulley, reduction box and clutch, the purpose of rotating at a high speed during dehydration more.Yet this mode also can be brought in the effect that reaches washing and dehydration, and noise is big, the fuselage vibrations, waste energy and because of wearing and tearing shortcoming such as break down easily.
In addition, the direct washing machine that drives of the common brshless DC motor of the employing of Chu Xianing has saved belt pulley and transport tape in the market, but the motor on-line operation greatly reduces noise in wide rotating speed power bracket, has improved transmission efficiency.But because the restriction of motor characteristic, though common brshless DC motor can realize satisfying the interior power output of the big range of speeds of washing machine operating mode, but motor operates under low-speed big and two kinds of operating modes of high speed simultaneously, is difficult to guarantee under every kind of operating mode, motor all is in best operating state, therefore, brshless DC motor is in the washing machine application, and it is in other application relatively, motor is in full operating mode scope, and overall performance is lower.
Therefore, how to make motor under optimum Working, can export low-speed big, can export the emphasis that high-speed driving becomes research again.
Dual rotor permanent magnetic motor has advantages such as volume is little, in light weight, for example application number is that 200410075764.3 Chinese invention patent application discloses a kind of dual rotor permanent magnetic motor, birotor shares a stator, stator is made of stator core and stator winding, but inside and outside two rotors all are to drive by the magnetic field that stator produces in this technology, the inner and outer rotors rotating speed is limited, can't realize simultaneously that washing machine adopts the function of different rotating speeds under washing and the two kinds of operating modes of dewatering.
Summary of the invention
The present invention is based on the magnetic field modulation principle, a kind of washing machine of realizing the dual rotor permanent magnetic motor of the little moment of torsion of high speed and low-speed big simultaneously and using this dual rotor permanent magnetic motor is provided, this dual rotor permanent magnetic motor possesses two power take-off mouths, external rotor and internal rotor can concern rotation by a certain percentage, by the different operating mode demands of appropriate design to satisfy the washing machine washing and to dewater of motor.
A kind of dual rotor permanent magnetic motor comprises internal rotor, stator and the external rotor from inside to outside arranged successively, and described internal rotor and external rotor are permanent magnet rotor, and described stator comprises magnetic modulation ring and the stator winding that encircles in this magnetic modulation around the home.
Changed the stator structure of existing dual rotor permanent magnetic motor in the dual rotor permanent magnetic motor of the present invention, adopted the magnetic modulation ring that can conduct magnetic field, stator winding is by producing the field drives internal rotor during work, the magnetic field that internal rotor also can change after rotating, external rotor is transmitted and be applied in the magnetic field of this variation by magnetic modulation ring, make external rotor begin to rotate, can avoid the rotating speed of inner and outer rotors influenced by stator like this, by regulating the number of pole-pairs relation of inner and outer rotors, the external rotor rotating speed that can obtain suiting.
Dual rotor permanent magnetic motor of the present invention has possessed the characteristics of magnetic field modulation magnetic gear, such as, inner and outer rotors rotates with certain gear ratio, carries higher torque density etc.That is to say, realized that motor the time can export the specification requirement that low-speed big can be exported the little moment of torsion of high speed again in work.
Described magnetic modulation endless belt has along circumferential equally distributed some adjustable magnetic teeth, is teeth groove between the adjacent adjustable magnetic tooth, and described stator winding is arranged in the corresponding teeth groove.
With regard to magnetic modulation ring itself material and structure with regard to can adopt prior art, the magnetic modulation encircles inner edge and has thinner yoke portion, also only is in order to connect each adjustable magnetic tooth.
The number of pole-pairs of described internal rotor is identical with the number of pole-pairs of described stator winding; The number of pole-pairs sum of the number of pole-pairs of described external rotor and internal rotor equals the number of teeth of adjustable magnetic tooth.
The identical magnetic field and the rotor that produce behind the stator winding electrifying of can guaranteeing with the number of poles of described stator winding of the number of poles of internal rotor mates, driving internal rotor that can be corresponding, and the number of pole-pairs sum of the number of pole-pairs of external rotor and internal rotor equals the number of teeth of adjustable magnetic tooth and can make internal rotor corresponding driving external rotor just.
In addition by the operation principle of magnetic field modulation magnetic gear as can be known, when magnetic modulation circumpolar number (number of pole-pairs of stator winding) was identical with the internal rotor number of pole-pairs, external rotor and the ratio of internal rotor number of pole-pairs equaled the inverse ratio of its rotating speed.That is to say that the number of pole-pairs of interior magnet rotor can design by the needs of inner and outer rotors rotating speed, can realize that inner and outer rotors presses certain gear ratio and rotate.
The number of pole-pairs of described external rotor is different from the number of pole-pairs of internal rotor.The magnetic field that produces behind stator winding electrifying like this can't effectively drive external rotor, the magnetic field of stator generation only has a very little part can influence to external rotor on the one hand, pass through the difference setting of number of pole-pairs on the other hand, guaranteed that further the main inner rotor of external rotor drives, but not driven by stator.
The present invention also provides a kind of rotary drum washing machine that has described dual rotor permanent magnetic motor.
A kind of rotary drum washing machine, comprise dehydration barrel, impeller and clutch, also comprise dual rotor permanent magnetic motor as described, the internal rotor of described dual rotor permanent magnetic motor drives dehydration barrel by described clutch, and the external rotor of dual rotor permanent magnetic motor drives impeller by described clutch.
Power output for the ease of internal rotor and external rotor, as preferably, the internal rotor of described dual rotor permanent magnetic motor and external rotor mate respectively inner rotor shaft and outer rotor shaft, and described inner rotor shaft and outer rotor shaft link with dehydration barrel and impeller respectively by described clutch.
When dual rotor permanent magnetic motor of the present invention was applicable to rotary drum washing machine, outer rotor shaft or inner rotor shaft connected with impeller axle or dehydration barrel axis respectively by clutch.When washing machine washed, the outer rotor shaft of motor linked by the impeller axle of clutch and washing machine, drove impeller and washed; When washing machine dewatered, inner rotor shaft linked by the dehydration barrel axis of clutch and washing machine, drove dehydration barrel and dewatered.
The present invention also provides a kind of roller washing machine that has described dual rotor permanent magnetic motor.
A kind of roller washing machine comprises cylinder and clutch, also comprises described dual rotor permanent magnetic motor, and the internal rotor of described dual rotor permanent magnetic motor and external rotor drive described cylinder respectively by described clutch.
Power output for the ease of internal rotor and external rotor, as preferably, the internal rotor of described dual rotor permanent magnetic motor and external rotor mate respectively inner rotor shaft and outer rotor shaft, and described inner rotor shaft and outer rotor shaft link with described cylinder respectively by described clutch.
When dual rotor permanent magnetic motor of the present invention was applicable to roller washing machine, outer rotor shaft or inner rotor shaft linked by clutch and drum shaft.When washing machine washed, outer rotor shaft linked by the cylinder of clutch and washing machine, and head roll washs; When washing machine dewatered, inner rotor shaft linked by the cylinder of clutch and washing machine, and head roll dewaters.
Dual rotor permanent magnetic motor of the present invention has dual-rotor structure based on the magnetic field modulation principle, and external rotor and internal rotor can concern rotation by a certain percentage, can satisfy the high-performance output of motor under low speed and high-speed working condition simultaneously.When dual rotor permanent magnetic motor of the present invention drives washing machine work, not only realized the designing requirement that motor had not only been exported low-speed big but also exported the little moment of torsion of high speed under optimum Working, and because omitted structures such as conventional washer middle belt pulley, reduction box, in the transmission efficiency that has improved motor, overcome that the conventional washer noise is big, the fuselage vibrations, wasted energy and because of wearing and tearing shortcoming such as break down easily.
Description of drawings
Fig. 1 is the cross-sectional view of embodiment of the invention dual rotor permanent magnetic motor;
Fig. 2 is the Distribution of Magnetic Field figure of embodiment of the invention dual rotor permanent magnetic motor;
Fig. 3 is the rotary drum washing machine structural representation of the embodiment of the invention;
Fig. 4 is the roller washing machine structural representation of the embodiment of the invention.
Embodiment
As shown in Figure 1, a kind of dual rotor permanent magnetic motor of the embodiment of the invention comprises from inside to outside internal rotor, stator and the external rotor of arranging successively, and namely stator is in the air gap between internal rotor and the external rotor, and also has air gap between inner and outer rotors and the stator respectively.
External rotor punching 4 and external rotor permanent magnet body 1 are formed external rotor; Internal rotor iron yoke 3 and internal rotor permanent-magnetic body 2 are formed internal rotor; Magnetic modulation ring and stator winding 5 constitute stator, and magnetic modulation endless belt has circumferentially equally distributed some adjustable magnetic teeth 6 of edge, is teeth groove between the adjacent adjustable magnetic tooth, and each effective edge of stator winding is arranged in the corresponding teeth groove.Circumferential arrow is represented the rotation direction of internal rotor and external rotor respectively among Fig. 1.
Utilize the adjustable magnetic tooth of stator to cause the variation of main magnetic circuit magnetic resistance, wherein the number of pole-pairs P of internal rotor permanent-magnetic body in the embodiment of the invention after the dual rotor permanent magnetic motor energising
iBe 2, the number of pole-pairs P of external rotor permanent magnet body
oBe 25, the tooth number Z of adjustable magnetic tooth is 27, satisfies to concern P
i+ P
o=Z.The rotating magnetic field number of pole-pairs that the threephase stator electric current that feeds when stator winding produces and the number of pole-pairs P of internal rotor permanent-magnetic body
iIdentical, and rotary speed and internal rotor rotary speed N
iWhen identical, internal rotor and stator can be considered as not having the internal rotor permanent-magnetic brushless electric machine of stator yoke portion, internal rotor rotary speed N
iWith the satisfied N that concerns of the stator current frequency f that feeds
i=60f/P
iAnd external rotor, internal rotor and adjustable magnetic tooth are formed magnetic field modulation type permanent magnet gear, inner and outer rotors rotary speed N
iAnd N
oSatisfy gearratio and concern N
i=-GN
o, G=P wherein
o/ P
i
In conjunction with Fig. 2 as can be known, the magnetic field that stator produces only has a very little part can influence to external rotor, and external rotor drives by internal rotor.
Referring to Fig. 3, a kind of rotary drum washing machine of the embodiment of the invention comprises exterior bowl 11, steel ladle 111, dynamo-electric bucket 112, dehydration barrel 12, impeller axle 132, dehydration barrel axis 131, clutch 14, outer rotor shaft 151, inner rotor shaft 152, dual rotor permanent magnetic motor 15 and impeller 16, and wherein dual rotor permanent magnetic motor 15 is installed in the outer barrel of washing machine body 11.In the dual rotor permanent magnetic motor 15, external rotor and outer rotor shaft 151 link, and internal rotor and inner rotor shaft 152 link.When washing machine washed, outer rotor shaft 151 linked by the impeller axle 132 of clutch 14 with washing machine, drove impeller 16 and washed; When washing machine dewatered, inner rotor shaft 152 linked by the dehydration barrel axis 131 of clutch 14 with washing machine, drove dehydration barrel 12 and dewatered.
Referring to Fig. 4, a kind of roller washing machine of the embodiment of the invention comprises shell 21, cylinder 22, economizes bucket 23, clutch 24, dual rotor permanent magnetic motor 25, outer rotor shaft 251, inner rotor shaft 252 and drum shaft 26, and wherein dual rotor permanent magnetic motor 25 is installed in the shell 21.In the dual rotor permanent magnetic motor, external rotor and outer rotor shaft 251 link, and internal rotor and inner rotor shaft 252 link.When washing machine washed, outer rotor shaft 251 linked by the cylinder 22 of clutch 24 with washing machine, and head roll 22 washs; When washing machine dewatered, inner rotor shaft 252 linked by the cylinder 22 of clutch 24 with washing machine, and head roll 22 dewaters.
Utilize dual rotor permanent magnetic motor of the present invention, the power output shaft of its inner and outer rotors can realize that respectively the washing of washing machine drives and dehydration drives function by clutch.Because the inner and outer rotors of motor is respectively high speed rotor and low speed rotor, so power output shaft do not need the reducing gear that adds, but directly links to each other with the washing machine load by clutch, and system effectiveness is higher; Simultaneously, can realize that motor driving shaft and washing machine bearing axle on same axis, save belt pulley, reduce vibration of washing machine.
Claims (8)
1. dual rotor permanent magnetic motor, comprise internal rotor, stator and the external rotor from inside to outside arranged successively, it is characterized in that described internal rotor and external rotor are permanent magnet rotor, described stator comprises magnetic modulation ring and the stator winding that encircles in this magnetic modulation around the home.
2. dual rotor permanent magnetic motor as claimed in claim 1 is characterized in that, described magnetic modulation endless belt has along circumferential equally distributed some adjustable magnetic teeth, is teeth groove between the adjacent adjustable magnetic tooth, and described stator winding is arranged in the corresponding teeth groove.
3. dual rotor permanent magnetic motor as claimed in claim 2 is characterized in that, the number of pole-pairs of described internal rotor is identical with the number of pole-pairs of described stator winding; The number of pole-pairs sum of the number of pole-pairs of described external rotor and internal rotor equals the number of teeth of adjustable magnetic tooth.
4. dual rotor permanent magnetic motor as claimed in claim 3 is characterized in that, the number of pole-pairs of described external rotor is different from the number of pole-pairs of internal rotor.
5. rotary drum washing machine, comprise dehydration barrel, impeller and clutch, it is characterized in that, also comprise as each described dual rotor permanent magnetic motor of claim 1～4, the internal rotor of described dual rotor permanent magnetic motor drives dehydration barrel by described clutch, and the external rotor of dual rotor permanent magnetic motor drives impeller by described clutch.
6. rotary drum washing machine as claimed in claim 5, it is characterized in that, the internal rotor of described dual rotor permanent magnetic motor and external rotor mate respectively inner rotor shaft and outer rotor shaft, and described inner rotor shaft and outer rotor shaft link with dehydration barrel and impeller respectively by described clutch.
7. a roller washing machine comprises cylinder and clutch, it is characterized in that, comprises that also the internal rotor of described dual rotor permanent magnetic motor and external rotor drive described cylinder respectively by described clutch as each described dual rotor permanent magnetic motor of claim 1～4.
8. roller washing machine as claimed in claim 7, it is characterized in that, the internal rotor of described dual rotor permanent magnetic motor and external rotor mate respectively inner rotor shaft and outer rotor shaft, and described inner rotor shaft and outer rotor shaft link with described cylinder respectively by described clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310278665.4A CN103346655B (en) | 2013-07-03 | 2013-07-03 | Dual rotor permanent magnetic motor and washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310278665.4A CN103346655B (en) | 2013-07-03 | 2013-07-03 | Dual rotor permanent magnetic motor and washing machine |
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| Publication Number | Publication Date |
|---|---|
| CN103346655A true CN103346655A (en) | 2013-10-09 |
| CN103346655B CN103346655B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310278665.4A Active CN103346655B (en) | 2013-07-03 | 2013-07-03 | Dual rotor permanent magnetic motor and washing machine |
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Application publication date: 20131009 Assignee: Ningguo Julong Reducer Co., Ltd. Assignor: Zhejiang University Contract record no.: 2016340000006 Denomination of invention: Birotor permanent magnet motor and washing machine Granted publication date: 20160120 License type: Exclusive License Record date: 20160425 |
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