CN102694431A - Novel high-power permanent magnet brushless motor - Google Patents
Novel high-power permanent magnet brushless motor Download PDFInfo
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- CN102694431A CN102694431A CN2012101657331A CN201210165733A CN102694431A CN 102694431 A CN102694431 A CN 102694431A CN 2012101657331 A CN2012101657331 A CN 2012101657331A CN 201210165733 A CN201210165733 A CN 201210165733A CN 102694431 A CN102694431 A CN 102694431A
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Abstract
The invention discloses a novel high-power permanent magnet brushless motor, comprising a pedestal, a stator, a rotor, a bearing and a position sensor device, wherein the two ends of the pedestal are respectively provided with a front end cover and a rear end cover; the stator, the rotor, the bearing and the position sensor device are respectively arranged in the pedestal; the rotor further comprises a rotor magnet steel, a rotor iron core and a rotary shaft; the rotor iron core is sheathed outside the rotary shaft; the rotor magnet steel is sheathed outside the rotary shaft and the iron core; the rotor magnet steel comprises a plurality of magnet steels with different polarities; and the magnet steel on each magnetic pole is in a block type structure and comprises more than two small pieces of magnet steel in the circumferential direction. With the adoption of the novel high-power permanent magnet brushless motor, the shortcomings that the rotor magnet steel is easy to emit heat and crush while the face pole type magnetic steel inner rotor runs at high speed and easily degausses caused by NdFeB magnet steel, leading out and connection of the signals of the position sensor device are tedious, and the bearing is easily damaged and processing waste of the cambered magnetic steel is large, so that the manufacturing cost of the high-power permanent magnet brushless motor is reduced, the reliability is improved, and the service life is increased.
Description
Technical field
The present invention relates to machine field, relate in particular to the novel high-power permanent magnetic brushless.
Background technology
Permanent-magnet brushless DC electric machine has been widely used in electronic information, automatic field and the defence equipment with its superior speed adjusting performance and higher energy conversion efficiency.But be limited to price, performance and the design of electrical motor of permanent magnetic material and the factor of technology aspect, generally only produce some low power permanent-magnet brushless DC electric machines at present.
Permanent-magnet brushless DC electric machine mainly is made up of permanent-magnet brushless DC electric machine body, position sensor arrangement and electronic driver three parts.Motor body is made up of stator and rotor, and structure is similar with AC permanent magnet synchronous motor, and the main distinction of itself and AC permanent magnet synchronous motor is the mouse cage winding that rotor has saved the permagnetic synchronous motor asynchronous starting.
The position sensor arrangement of permanent-magnet brushless DC electric machine generally is installed on the motor body, is used for the position of detection rotor magnetic pole relative stator, and the sub-driver of supplying power correctly commutates to the stator winding electric current, makes motor produce the torque that continues.Usually, position sensor arrangement all is connected with electronic driver with one group of line.People have proposed multiple position-sensor-free device solves scheme in order to reduce line, and the most influential is the back-emf detection method.But at present the position-sensor-free Device Testing is not very accurate, the bigger occasion of load variations particularly, and the accuracy of detection is lower.So the position sensorless apparatus mainly is suitable for use in load variations not quite and the occasion of having foreseen.
Electronic driver is exactly in fact an electronic inverter, through to the judgement of stator, rotor relative position and the effect of external control signal, controls the sense of current and the size of motor windings, makes motor rotation.
The major obstacle that the restricting current permanent-magnet brushless DC electric machine maximizes has: epitrochanterian magnet steel receives the restriction of magnet steel tensile strength and fastening strength cracked easily, falls apart when 1, running up; 2, magnet steel is demagnetized by action of temperature easily; 3, drawing of position sensor arrangement signal connects loaded down with trivial detailsly, and reliability is lower; 4, it is shorter that bearing receives faradic electrochemical corrosion working life.
Mostly the rare earth magnetic steel material that is used to make rotor magnetic steel is fragility, and compression strength is high, and tensile strength is lower, must make epitrochanterian magnet steel bear very big centrifugal force if run up, thus cause magnet steel broken, come off.To this problem, solution commonly used at present is to reinforce magnet steel with high-intensity non-magnetic or low magnetic material, generally has stainless steel or titanium alloy hoop cover, glass fiber, carbon fiber and aramid fiber to twine method.
Stainless steel or titanium alloy hoop cover relatively are fit to rotor integral body and magnetize, and through hot jacket hoop are locked and are rolled in outside the magnet steel.But to the neodymium iron boron that magnetizes in advance, this method is not satisfactory, because the Curie point of neodymium iron boron is lower, is easy to cause the magnet steel demagnetization during hot jacket.If cold cover then can not guarantee the banding quality.Bulk metal can produce bigger eddy current when being enclosed within the motor operation, reduces electric efficiency, improves the magnet steel temperature.
Use nonconducting high-modulus, high strength fibre winding method to reinforce, found effect and ideal not as expecting.Main cause be the compression strength of high modulus and strength fiber material generally all far below its tensile strength, because of the surface of motor rotor magnetic steel very smooth not, particularly the edge of magnet steel is also very sharp sometimes.When motor runs up, be wrapped in the outer high modulus and strength fiber of magnet steel and not only will receive tension force, shear stress also will be born in indivedual positions, usually ftractures during historical facts or anecdotes is trampled.In addition when twining with these high strength fibres, the processing of fiber end is more complicated also, wastes time and energy.
In order to improve power of motor density; Give full play to the performance of ferromagnetic material; The high-power permanent magnet brshless DC motor is made the form of surperficial magnetic pole more, when the past, people designed magnet steel except considering the magnetic field performance mainly for technologic convenience, all be magnet steel with large-size.Only if when every polar arc length was big, the magnet steel of monoblock not only was difficult to make, and assembling is very difficult, has to be divided into some blocks of cambered surface magnet steel to the magnet steel of same magnetic pole for this reason.The main principle of the magnet steel piecemeal of same magnetic pole is the hand-power that the suction of every block of magnet steel and rotor core is not more than the operative employee, and the arc length of these magnet steel and axial length are usually at 40～100mm.There is very big problem in this design, does not promptly take into full account the influence of eddy current in the magnet steel.Sintering rare-earth magnet steel resistivity is very low, and magnet steel can produce eddy-current heating because of the variation in magnetic field in motor operation course, just because mostly motor is enclosed construction usually, be difficult for observing.Particularly when the magnet steel volume was big, the magnet steel eddy-current heating of bulk was more serious.Just begin the phenomenon that descends so performance after a period of time usually appears normally moving in the high-power permanent magnet brshless DC motor, to be exactly magnet steel cause demagnetization because of overheated to its chief culprit.
The processing cost of cambered surface magnet steel is higher, receives the restriction of magnet steel production technology, and mostly the stock of producing magnet steel is cube, and cambered surface generally all is to adopt the higher electric machining of cost, and the utilance of the big more material of radian is just low more.Mostly known high-power permanent magnet brshless DC motor magnet steel is to have the cambered surface magnet steel of locating counterbore now in addition.The processing of counterbore not only will increase processing charges, also can reduce total magnetic flux.
The electronic commutation of permanent-magnet brushless DC electric machine depends on the judgement to rotor-position.The lead-in wire of position sensor arrangement generally comprises two power lines and Duo Gen holding wire, and the line number is more, gets wrong easily, makes that the field adjustable of motor is more time-consuming, usually can not in time move.In any case but the brushless electric machine of position sensor device is all reliable than the brushless electric machine of position sensorless apparatus, no matter load how to change, rotating speed height no matter, motor can both be given the correct all the time torque of outgoing direction.Simple position sensor arrangement can only provide rotor-position signal, also will use more holding wire if will obtain the temperature signal of accurate tach signal and rotor.
The bearing of the more common power frequency asynchronous machine of the bearing of permanent magnetic brushless damages more easily.Tracing it to its cause one is that the PWM voltage of electronic driver output causes the magnetic field of motor internal asymmetric, can between motor shaft and the end cap, induce voltage, and this voltage can be applied on the Internal and external cycle of bearing fully; The 2nd, magneto makes the bearing magnetization easily when assembling, cause the voltage that produces between the Internal and external cycle of bearing during high speed rotating.When the voltage value that produces between the Internal and external cycle of bearing surpasses the dielectric strength of the lubricating oil in the bearing, will puncture oil film and form a current path, thereby cause the electrochemical corrosion of ball and raceway, cause bearing life to shorten rapidly.
In sum, the major obstacle that the restriction permanent-magnet brushless DC electric machine maximizes has: when 1, motor ran up, rotor strength received the restriction of magnet steel and bonding strength to occur magnet steel broken and come off (except the external rotor) easily; 2, the magnet steel of bulk is demagnetized by the double action of temperature and demagnetizing field easily; 3, the lead-out wire quantity of position sensor arrangement signal is many, connects loaded down with trivial details; 4, bearing life is shorter.
Owing to there are the problems referred to above, very big obstacle is being made, run into when promoting to the high-power permanent magnet brushless electric machine at present.
Summary of the invention
In order to overcome the deficiency of prior art, the object of the present invention is to provide a kind of manufacturing cost to reduce, reliability improves, the high-power permanent magnet brshless DC motor of ILS.
Technical scheme of the present invention is: a kind of novel high-power permanent magnetic brushless, and it comprises support, stator, rotor, bearing and position sensor arrangement, the support two ends are respectively equipped with forward and backward end cap; Stator, rotor, bearing and position sensor arrangement are located in the support respectively; The rotor rear and front end is respectively equipped with front end-plate and end plate; Said rotor also comprises rotor magnetic steel, rotor core and rotating shaft, and rotor core is set in outside the rotating shaft, and rotor magnetic steel is set in outside the rotating shaft iron core; Said rotor magnetic steel is made up of the magnet steel of some opposed polarities, and the magnet steel of each magnetic pole is a fraction block structure, and it is made up of the little magnet steel more than two in a circumferential direction.
All below 40mm, it is plane or cambered surface with the bottom surface that combines unshakable in one's determination for the pole-face length of said every block of little magnet steel or width.
The bottom surface that said every block of little magnet steel combines with rotor core is provided with more than one groove or convexity; Said rotor core is a multi-edge column-shaped; The width of each prismatic surface is corresponding with the bottom surface length of every block of little magnet steel, each prismatic surface be provided with every little magnet steel bottom surface on convexity or groove match fixing groove or convexity.
Be wound with high duty metal silk along the circumferential direction on the said rotor magnetic steel external peripheral surface.
Said wire surface is provided with insulating barrier, and cross section wiry is rectangle or circle.
Be respectively equipped with the V-shaped groove of an above fixing metal silk termination on said rotor front end-plate and the rotor end plate.
The front end-plate of said rotor, end plate are the metal of no magnetic or weak magnetic.
Said bearing is the nonmetal bearing shell of ceramic ball bearing, ceramic roller bearing, porcelain ring bearing or anti-galvano-cautery.
The output of said position sensor arrangement connects the input of electronic driver, and the output of electronic driver connects stator, adopts digital serial communication or FDM modulated carrier to communicate by letter between said position sensor arrangement and electronic driver.
Said position transducer and its power supply, electronic driver be electrically connected lead below three.
Said position sensor arrangement comprises that single-chip microcomputer, carrier modulator and one are with upper sensor; When position sensor arrangement uses serial communication technology; Each transducer receives each transducing signal, and single-chip microcomputer sends to carrier modulator after the conversion of signals that receives is become high-speed serial signals, and carrier modulator is modulated into high-frequency signal with the high-speed serial signals that receives and is loaded on the power line; Or use an independent holding wire in addition; Send to electronic driver, electronic driver is reduced to each controlled quentity controlled variable with the high-frequency carrier signal that receives, the sense of current and the size of control stator winding.The advantage of serial communication is transmission easily than great deal of information, particularly except information such as all right accurate transfer temperature in position.
Said position sensor arrangement can also comprise that an above carrier modulator and one are with upper sensor; Adopt the FDM modulation technique that the carrier modulator of a plurality of different sensor signals through correspondence is loaded into a holding wire or directly is loaded on the power line; How much information that makes position sensor arrangement no matter transmit has, and is electrically connected lead all below three.
High-power permanent magnet brushless electric machine of the present invention compared with prior art has following remarkable advantage:
1, in the motor operation course; Because the magnet steel of same magnetic pole is divided into length and the less little magnet steel of polylith of width, can reduce the eddy-current heating of magnet steel, the temperature rise of magnet steel obviously reduces; During normal use magnet steel can not demagnetize, and the power loss of motor and temperature rise all will reduce.
2, because the pole-face of every block of little magnet steel is plane or the very little cambered surface of radian, said rotor magnetic steel can be used slicing machine and grinding machine processing, and working (machining) efficiency is apparently higher than electric machining, and spillage of material also significantly reduces.
3, the groove or the convexity of corresponding matching are set in rotor magnetic steel and the rotor core, can avoid sticking wrong, and improve efficiency of assembling greatly, rotor magnetic steel and rotor core are connected firmly.
4, the high duty metal silk twines the reinforcing rotor and can guarantee that rotor has higher bulk strength, and manufacturability better than the better effects if that metal sleeve is reinforced and the high-module high-strength fiber twines, can ignore because of its swirl ratio of surface insulation is less by wire.Simultaneously, wire can be selected thermal coefficient of expansion and the approaching material of the rotor magnetic steel coefficient of expansion, can reduce Yin Wendu and raise, the compelled extra-stress that bears of rotor magnetic steel.
5, the V font groove of rotor front end-plate, rotor end plate has guaranteed that the wire winding process is simple, quick, reliable.
6, the position sensor arrangement that is installed on the motor adopts the lead below three to link to each other with electronic driver; Position sensor arrangement provides dc (direct current) power supply, and position sensor arrangement sends the information such as temperature at the position signalling that records and each position of rotor to high-speed figure serial communication mode or FDM modulation system the control circuit of brushless electric machine through carrier wave; Farthest reduce the amount of information that position sensor arrangement is drawn the quantity of lead, increased position sensor arrangement, improve the reliability of transmission.
7, the nonmetal bearing shell of ceramic ball bearing, ceramic roller bearing, porcelain ring bearing or anti-galvano-cautery thoroughly exempted bearing galvano-cautery, significantly improved the useful life of motor.
In a word; High-power permanent magnet brushless electric machine of the present invention overcome face utmost point formula magnet steel internal rotor when running up rotor magnetic steel easily heating and cracked, use that Nd-Fe-B magnet steel demagnetizes easily, drawing of position sensor arrangement signal connect deficiencies such as loaded down with trivial details, that bearing damages easily and cambered surface magnet steel processing waste is big; The manufacturing cost of high-power permanent magnet brshless DC motor is reduced, and reliability improves, ILS.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation:
Fig. 1 is the structural representation of novel high-power permanent magnetic brushless of the present invention;
Fig. 2 is the structural representation of rotor of the present invention;
Fig. 3 is the structural representation of first kind of rotor magnetic steel;
Fig. 4 is the structural representation of second kind of rotor magnetic steel;
Fig. 5 is the structural representation that rotor magnetic steel cooperates with rotor core;
Fig. 6 adopts the structural representation of digital serial communication for position sensor arrangement;
Fig. 7 adopts the structural representation of FDM modulated carrier communication for position sensor arrangement.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed explanation.
Shown in one of Fig. 1-7, a kind of novel high-power permanent magnetic brushless of the present invention, it comprises support 1, stator 2, rotor 3, bearing 4 and position sensor arrangement 5, support 1 two ends are respectively equipped with forward and backward end cap 6; Stator 2, rotor 3, bearing 4 and position sensor arrangement 5 are located at respectively in the support 1; Rotor 3 rear and front ends are respectively equipped with front end-plate 7 and end plate 8; Said rotor 3 also comprises rotor magnetic steel 31, rotor core 32 and rotating shaft 33; Rotor core 32 is set in outside the rotating shaft 33, and rotor magnetic steel 31 is set in outside the rotating shaft unshakable in one's determination 32; Said rotor magnetic steel 31 is made up of the magnet steel of some opposed polarities, and the magnet steel of each magnetic pole is a fraction block structure, and it is made up of the little magnet steel 34 more than two in a circumferential direction.
Among the present invention, the pole-face length of said every block of little magnet steel 34 or width are all below 40mm.Because the pole-face length of every block of little magnet steel 34 or width are below 40mm; Rotor magnetic steel 31 is in motor operation course like this, and because of the variation generation eddy-current heating amount in magnetic field is little, the temperature rise of rotor magnetic steel 31 obviously reduces; During normal use rotor magnetic steel 31 can not demagnetize, can chipping phenomenon yet; The power loss of motor and temperature rise all will reduce.
As shown in Figure 3, the structure of first kind of little magnet steel 34 is: the pole-face 35 of said little magnet steel 34 is cambered surface, and the bottom surface 36 that little magnet steel 34 combines with rotor core 32 also is cambered surface.
As shown in Figure 4, the structure of second kind of little magnet steel 34 is: the pole-face 35 of said little magnet steel 34 is the plane, and the bottom surface 36 that little magnet steel 34 combines with rotor core 32 also is the plane, and the little magnet steel 34 of being convenient to same magnetic pole is installed.Because the magnet steel of same magnetic pole is adopted fraction block structure; Little magnet steel 34 by more than two is formed; And the pole-face 35 of every block of little magnet steel 34, the bottom surface 36 that combines with rotor core 32 are the plane; The little magnet steel 34 on plane can be used slicing machine and grinding machine processing like this, and working (machining) efficiency is apparently higher than electric machining, and spillage of material also significantly reduces.
As shown in Figure 5; The bottom surface 35 that said every block of little magnet steel 34 combines with rotor core 32 is provided with more than one groove or protruding 37; Said rotor core 32 is a multi-edge column-shaped; The width of each prismatic surface 38 is corresponding with bottom surface 35 length of every block of little magnet steel 34, each prismatic surface 38 be provided with every little magnet steel bottom surface 35 on convexity or groove 37 match fixing groove or protruding 39.Can make rotor magnetic steel 31 and rotor core 32 fixations like this, also be convenient to install fast.
Silicon steel plate punching or the solid good permeability magnetic material of said rotor core 32 for laminating, the steel higher with permeability processes, to reduce the eddy current loss of rotor core 32.
As shown in Figure 2, be wound with high duty metal silk 9 along the circumferential direction on said rotor magnetic steel 31 external peripheral surfaces.High duty metal silk 9 twines to be reinforced rotors 3 and can guarantee that rotor 3 has higher bulk strength, and manufacturability is better reinforced the better effects if with the winding of high-module high-strength fiber than metal sleeve, and swirl ratio is less can ignore.Simultaneously, wire 9 can be selected thermal coefficient of expansion and the approaching material of rotor magnetic steel 31 coefficients of expansion, can reduce Yin Wendu and raise, the rotor magnetic steel 31 compelled extra-stresses that bear.Wire 9 can be selected titanium silk or austenite stainless steel wire etc. for use.
Said wire surface is provided with insulating barrier, and cross section wiry is rectangle or circle, is preferably rectangle.
As shown in Figure 2, be respectively equipped with the V-shaped groove 10 of above fixing metal silk 9 terminations on said rotor front end-plate 7 and the rotor end plate 8.
The degree of depth of said V-shaped groove 10 and width are greater than the diameter of wire 9.
The front end-plate 7 of said rotor 3, end plate 8 are the metal of no magnetic or weak magnetic.
Said bearing 4 is the nonmetal bearing shell of ceramic ball bearing, ceramic roller bearing, porcelain ring bearing or anti-galvano-cautery, avoids the galvano-cautery of bearing 4, improves the useful life of motor bearings.
As shown in Figure 6; The output of said position sensor arrangement 5 connects the input of electronic driver 11; The output of electronic driver 11 connects stator 2, and said position sensor arrangement 5 adopts digital serial communication or FDM modulated carrier to communicate by letter with 11 of electronic drivers.
As shown in Figure 6; Said position sensor arrangement 5 comprises single-chip microcomputer 51, carrier modulator 52 and one with upper sensor 53, and when position sensor arrangement 5 used serial communication technologies, each transducer 53 received each transducing signal; Single-chip microcomputer 51 sends to carrier modulator 52 after the conversion of signals that receives is become high-speed serial signals; Carrier modulator 52 is modulated into high-frequency signal with the high-speed serial signals that receives and is loaded on the power line, or uses an independent holding wire in addition, sends to electronic driver 11; Electronic driver 11 is reduced to each controlled quentity controlled variable with the high-frequency carrier signal that receives, the sense of current and the size of control stator winding.The advantage of serial communication is transmission easily than great deal of information, particularly except information such as all right accurate transfer temperature in position.
As shown in Figure 7; Said position sensor arrangement 5 can also comprise that more than one carrier modulator 52 and one are with upper sensor 53; Adopt the FDM modulation technique that the carrier modulator 52 of a plurality of different sensor signals through correspondence is loaded into a holding wire or directly is loaded on the power line; How much information that makes position sensor arrangement 5 no matter transmit has, and is electrically connected lead all below three.
Claims (10)
1. novel high-power permanent magnetic brushless, it comprises support, stator, rotor, bearing and position sensor arrangement, the support two ends are respectively equipped with forward and backward end cap; Stator, rotor, bearing and position sensor arrangement are located in the support respectively; The rotor rear and front end is respectively equipped with front end-plate and end plate; Said rotor also comprises rotor magnetic steel, rotor core and rotating shaft, and rotor core is set in outside the rotating shaft, and rotor magnetic steel is set in outside the rotating shaft iron core; It is characterized in that: said rotor magnetic steel is made up of the magnet steel of some opposed polarities, and the magnet steel of each magnetic pole is a fraction block structure, and it is made up of the little magnet steel more than two in a circumferential direction.
2. novel high-power permanent magnetic brushless according to claim 1 is characterized in that: all below 40mm, it is plane or cambered surface with the bottom surface that combines unshakable in one's determination for the pole-face length of said every block of little magnet steel or width.
3. novel high-power permanent magnetic brushless according to claim 2; It is characterized in that: the bottom surface that said every block of little magnet steel combines with rotor core is provided with more than one groove or convexity; Said rotor core is a multi-edge column-shaped; The width of each prismatic surface is corresponding with the bottom surface length of every block of little magnet steel, each prismatic surface be provided with every little magnet steel bottom surface on convexity or groove match fixing groove or convexity.
4. novel high-power permanent magnetic brushless according to claim 1 is characterized in that: be wound with high duty metal silk along the circumferential direction on the said rotor magnetic steel external peripheral surface.
5. novel high-power permanent magnetic brushless according to claim 4 is characterized in that: said wire surface is provided with insulating barrier, and cross section wiry is rectangle or circle.
6. novel high-power permanent magnetic brushless according to claim 5 is characterized in that: the V-shaped groove that is respectively equipped with an above fixing metal silk termination on said rotor front end-plate and the rotor end plate.
7. novel high-power permanent magnetic brushless according to claim 6 is characterized in that: the front end-plate of said rotor, end plate are the metal of no magnetic or weak magnetic.
8. novel high-power permanent magnetic brushless according to claim 1 is characterized in that: said bearing is the nonmetal bearing shell of ceramic ball bearing, ceramic roller bearing, porcelain ring bearing or anti-galvano-cautery.
9. novel high-power permanent magnetic brushless according to claim 1; It is characterized in that: the output of said position sensor arrangement connects the input of electronic driver; The output of electronic driver connects stator, adopts digital serial communication or FDM modulated carrier to communicate by letter between said position sensor arrangement and electronic driver.
10. novel high-power permanent magnetic brushless according to claim 9 is characterized in that: said position transducer and its power supply, electronic driver be electrically connected lead below three.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101657331A CN102694431A (en) | 2012-05-25 | 2012-05-25 | Novel high-power permanent magnet brushless motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101657331A CN102694431A (en) | 2012-05-25 | 2012-05-25 | Novel high-power permanent magnet brushless motor |
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| CN102694431A true CN102694431A (en) | 2012-09-26 |
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| CN2012101657331A Pending CN102694431A (en) | 2012-05-25 | 2012-05-25 | Novel high-power permanent magnet brushless motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226903A (en) * | 2015-07-31 | 2016-01-06 | 常州市昊升电机有限公司 | Brushless pot motor |
| CN105846580A (en) * | 2016-06-06 | 2016-08-10 | 南通金驰机电有限公司 | Surface-mounted permanent magnet motor structure |
| CN108429408A (en) * | 2017-02-15 | 2018-08-21 | 住友重机械工业株式会社 | Motor |
| CN113098220A (en) * | 2021-03-14 | 2021-07-09 | 重庆恒博机械制造有限公司 | Permanent magnet motor and manufacturing method thereof |
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| CN1472873A (en) * | 2002-07-29 | 2004-02-04 | 西北工业大学 | Brushless rareearth persistant magnet DC motor |
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| CN102064622A (en) * | 2009-10-01 | 2011-05-18 | 信越化学工业株式会社 | Rotor for permanent magnet rotary machine |
| CN102355070A (en) * | 2011-09-14 | 2012-02-15 | 管洪安 | Ferrite rotor of brushless motor |
| CN202679204U (en) * | 2012-05-25 | 2013-01-16 | 福建尤迪电机制造有限公司 | Novel high power permanent magnetism brushless motor |
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| CN2123135U (en) * | 1992-06-04 | 1992-11-25 | 北京市西城区新开通用试验厂 | Winding protective ring for rotors of high-speed motor |
| CN1472873A (en) * | 2002-07-29 | 2004-02-04 | 西北工业大学 | Brushless rareearth persistant magnet DC motor |
| CN1578102A (en) * | 2003-07-16 | 2005-02-09 | 松下电器产业株式会社 | Motor controller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226903A (en) * | 2015-07-31 | 2016-01-06 | 常州市昊升电机有限公司 | Brushless pot motor |
| CN105846580A (en) * | 2016-06-06 | 2016-08-10 | 南通金驰机电有限公司 | Surface-mounted permanent magnet motor structure |
| CN108429408A (en) * | 2017-02-15 | 2018-08-21 | 住友重机械工业株式会社 | Motor |
| CN113098220A (en) * | 2021-03-14 | 2021-07-09 | 重庆恒博机械制造有限公司 | Permanent magnet motor and manufacturing method thereof |
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Effective date of abandoning: 20180309 |