CN1056480C - Single phase brushless motor - Google Patents
Single phase brushless motor Download PDFInfo
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- CN1056480C CN1056480C CN94102669A CN94102669A CN1056480C CN 1056480 C CN1056480 C CN 1056480C CN 94102669 A CN94102669 A CN 94102669A CN 94102669 A CN94102669 A CN 94102669A CN 1056480 C CN1056480 C CN 1056480C
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Abstract
The present invention has the aim for obtaining motor approaching to an ideal synthetic torque curve by slightly improving one of the parts which are used in the original motor. Accordingly, a single phase brushless motor can be certainly and automatically started, the thickness of the single phase brushless motor can be reduced, and the motor has light weight and good mass production performance so that the motor can be produced at mass at low cost. The present invention is characterized in that a magnet for obtaining dead point pulling torque, and a reluctance torque generation device for automatically starting magnet dents, etc. of a magnet bulge or notch part, etc., are arranged on the position of a configuring angle theta (theta is smaller than pi /2 and is larger than 0, and pi is an electric angle of 180 DEG from the position of a dead point which is used as a switching-on switching point of an armature coil.
Description
The present invention relates to a kind of can be with the very simple self-running brushless single phase motor of structure, the present invention is suitable for being used in the use field of the axial flow fan motor of the cooling that for example is used for computer, Switching Power Supply etc. etc.
Usually, brushless motor then is being widely used in recent years because to have the torque shape more higher than feature and reliability big and controlled DC motor such as good.And, in general widely used brushless motor, mainly be 2 mutually with 3 mutually.
For brushless single phase motor, shown in the part of Figure 13 (a), like that, express the resulting electromagnetic torque curve of the armature coil 1-1 when switching on by armature coil.Wherein, in Figure 13, be the anglec of rotation on the transverse axis, be the size of torque on the longitudinal axis.
For 2 corresponding with it phase brushless motors, owing to have at the 2 phase armature coils that differ pi/2 (π is the degree of 180 on the electrical degree) angular phase on the electrical degree, such shown in the part of Figure 13 (b), express when this 2 phase armature coil energising respectively by the resulting electromagnetic torque curve of 2 phase armature coils 1-1,1-2.
Therefore, like that, express with these two electromagnetic torque curve 1-1 and 1-2 the synthetic torque curve 2-1 when synthetic shown in Figure 13 (e), not having torque is that be the dead point zero point.
Like this, if in this two-phase brushless motor, switch on, be zero point owing on what position of rotation, all there is not torque, can the self-starting rotation.
And, for 3 phase brushless motors, because 3 phase armature coils of phase difference of pi on electrical degree/3 angular phase are arranged, such shown in the part of Figure 13 (d), express when this 3 phase armature coil energising respectively by the resulting electromagnetic torque curve of 3 phase armature coils 1-1,1-3 and 1-4.
Thereby, shown in the part of Figure 13 (e), like that, express with 3 electromagnetic torque curve 1-1,1-3 and 1-4 the synthetic torque curve 2-2 when synthetic, identical with 2 phase brushless motors, not having torque is that zero point is the dead point.
Like this, if in this 3 phase brushless motor, switch on, then no matter can both the self-starting rotation on what position of rotation.And indicated as synthetic torque curve 2-2, owing to more level and smooth than synthetic torque curve 2-1, electronic function is smoothly rotated, and just can obtain well behaved motor.For torque is favourable.
Wherein, for brushless motor, because the Magnetic Sensor such as Hall unit that detects the magnetic field magnets N utmost point, S utmost point magnetic pole is necessary to the number state mutually of motor only with the circuit (so-called drive circuit, electronic commutation circuit) that uses this Magnetic Sensor the energising of armature coil is switched, and the many more just expensive more shortcomings of the number of phases of motor are then just arranged.
Therefore, carrying out in the device of the employed axial flow fan motor of cooling purpose forming contrary wind at an easy rate, use the many brushless motors of the expensive like this number of phases, is not a good method.
, must cheap form in the device of axial flow fan motor for this reason, thus preferably Magnetic Sensor just drive circuit is just enough with 1 with 1, brushless single phase motor that can the cheapness formation.
But this brushless single phase motor is on the energising switching point of armature coil, and torque is zero, has so-called " dead point ".With reference to Figure 13 (a), under the situation of brushless single phase motor, because armature coil is a single phase configuration, resulting electromagnetic torque curve 1-1 during the armature coil energising, on the energising switching point in 2 π angles, have dead point 3-1, the 3-2 position of two places torque zero passage.By such dead point 3-1,3-2 position and make under the situation that the magnetic field magnet stops, once Magnetic Sensor is parked on the position facing to the dead point, even can not obtain rotating torques to the energising of this brushless single phase motor and since become can not the self-starting rotation motor, just be unsuitable for practicality.When the magnetic field magnet is parked on dead point 3-1, the 3-2 position, because Magnetic Sensor becomes the state of the pole boundary portion of detecting the magnetic field magnets N utmost point and the S utmost point, just can not obtain output signal from Magnetic Sensor, just can not export signal to the armature coil energising, just can not switch on to armature coil, the magnetic field magnet can the self-starting rotation.
, on brushless single phase motor, provide, and this motor of eliminating the dead-centre position by additional cogging torque (reluctance torque) stops phenomenon, just energy self-starting by armature coil and the resulting electromagnetic torque of magnetic field magnet for this reason.Its typical example is No. the 3rd, 873,897, United States Patent (USP) shown in Figure 14.It is in the motor of cylinder type structure unshakable in one's determination, dash forward the like this Surface Machining of the utmost point 7: make by and facing to magnetic field magnet 24 ' and the prominent utmost point 7 surfaces of iron core around the stator core 6 of armature coil 9 of radial air gap 4 on the length of above-mentioned radial air gap, form inclination, therefore, structure becomes complicated.Because the iron core structure around the iron core of armature coil 9 is dashed forward utmost point shape except the costliness that becomes because of complex structure, also has the shortcoming of Heavy Weight.The motor of this structure, for the miniature motor that is applicable in the midget plant such as nearest needed normal mo(u)ld top half computer, it is difficult forming the thinner light-duty axial flow fan motor of thickness by the surface of this spline structure.
In can self-running brushless single phase motor,, just must obtain synthetic torque curve 2-3 shown in Figure 15 in order to obtain desirable torque one anglec of rotation curve.The 5th, indicated by electromagnetic torque curve 1-1 and magnetic resistance curve 5 for the reluctance torque curve of the torque that obtains detaching from the dead-centre position, reluctance torque is preferably 1/2nd size of electromagnetic torque.Like this, in the Zone Full of the anglec of rotation, obtain becoming the synthetic torque curve 2-3 of roughly the same rotating torques.
The objective of the invention is: utilize the part of used parts in former brushless single phase motor etc., only carry out improvement slightly, on desired location, produce self-starting enough and suitably size with (being used for deviating from) reluctance torque from the dead point, make obtain near the synthetic torque curve 2-3 of above-mentioned ideal really can self-running brushless single phase motor its thickness of attenuate easily, by light-duty and have good batch process, just can carry out cheap batch process.
Purpose of the present invention can reach like this: be provided for to such an extent that deviate from the self-starting reluctance torque generation devices such as magnet, magnet projection or magnet depression of torque to the dead point from the θ position, configuration angle as the dead-centre position 0＜θ＜pi/2 (π is the degree of 180 on an electrical degree angle) of the energising switching point of single phase configuration armature coil, thereby above-mentioned magnetic field magnet can be avoided the torque of deviating from that is constrained on the above-mentioned dead-centre position.
Another purpose can reach like this: taking place to cave in magnet, magnet projection or magnet from towards the about π/4 configuration θ positions, angle of reverse directions above-mentioned reluctance torque being set as the dead-centre position of above-mentioned armature coil energising switching point, thereby above-mentioned magnetic field magnet can be avoided the torque of deviating from that is constrained on the above-mentioned dead-centre position.
Another purpose can reach like this: form set in from as the circumferential side breach end of magnet depressed part towards the locational above-mentioned notch part of configuration angle θ of the about π of reverse directions/4 etc., the dead-centre position of armature coil energising switching point.
Another purpose can realize like this: above-mentioned reluctance torque produces with magnet, magnet projection or magnet depression, and its part is extended on the direction that magnetic air gap extends and formed at least.
Another purpose can realize like this: above-mentioned reluctance torque is produced the magnet projection of usefulness, as the magnet bolt that is used for fixing for the parts of the above-mentioned armature coil that sets printed base plate and stator yoke etc. in above-mentioned magnetic field.
Another purpose can realize like this: above-mentioned reluctance torque is produced with the magnet depressed part as being used for that magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field is left breach and the notch parts such as through hole that form.
Another purpose can realize like this: the terminal of above-mentioned armature coil is passed in notch parts such as being used on the magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field formed through hole, thereby is directed to drive circuit side on the opposite flank that is equipped in so-called surface facing to stator yoke magnetic field magnet to carry out the electrical connection with this drive circuit side.
Another purpose can realize like this: the checkout gear that detects above-mentioned magnetic field magnet is a Magnetic Sensor, this magnetic sensor configuration to comprising with on the position on this conductor portion extended line that the relative position of the conductor portion of armature coil generation torque is provided.
Another purpose can realize like this: above-mentioned Magnetic Sensor is set to and is used for closure and is located at the notch part positions such as formed through hole on magnet assembly that the magnetic circuits such as stator yoke in the relative above-mentioned magnetic field of the conductor portion of armature coil generation torque are provided.
Another purpose can realize like this: brushless single phase motor, as the Axail air gap type structure, facing toward on the armature coil device substrate surface by above-mentioned magnetic field magnet and air gap, armature coil is assembled into single phase configuration and assembles the circuit elements such as IC that drive circuit is used simultaneously; The Magnetic Sensor that detects the magnetic field of above-mentioned magnetic field magnet is in to be provided on the conductor portion internal diameter direction of the armature coil generation torque extended line position, and is assembled on the relative above-mentioned armature coil assembling substrate surface of different these armature coils.
When no power, magnetic field magnet 24 is parked in magnet bolt 23 magnetic to be inhaled and on can self-running position mutually.Thereby, when energising,, for example detect the N utmost point, thereby the electric current of the predetermined direction that will circulate makes magnetic field magnet 24 rotate along the predetermined direction self-starting in armature coil 9-1,9-2 because Magnetic Sensor 30 must detect the N utmost point of magnetic field magnet 24 or the magnetic pole of the S utmost point.Once magnetic field magnet 24 rotates about 1/4th magnetic poles in a predetermined direction, armature coil 9-1,9-2 just produce maximum starting torque, continue along equidirectional rotation.In 24 rotations of magnetic field magnet, once Magnetic Sensor 30 detects the S utmost point magnetic pole of field pole 24, just circulation opposite direction electric current in armature coil 9-1,9-2, thus the rotating torques that just obtains predetermined direction continues to make magnetic field magnet 24 along equidirectional rotation.By carrying out above-mentioned action repeatedly, brushless single phase motor 8 will rotate continuously.
Fig. 1 is the exploded perspective view of Axail air gap type single-phase (DC) the brush-less fan motor 8 of expression first embodiment of the invention; Fig. 2 is the longitudinal section of this fan motor 8; Fig. 3 is the key diagram of the installation site of Magnetic Sensor 30; Fig. 4 deviates from torque and the optimum position schematic diagram of screw fixed magnet bolt 23 in order to arrive the dead point; Fig. 5 is a magnetic field magnet 24 with the expanded view of 9 groups of the armature coils of single phase configuration; Fig. 6 is that expression constitutes the drive circuit schematic diagram as the single-phase power-on circuit of an example.The dish-type brushless single phase fan motor 8 of expression the 1st embodiment is described below with reference to Fig. 1 to Fig. 6.
Thin square axial air-gap brushless single phase (axial flow) fan motor 8 of axial width is for having (Venturi) shell 10 in the venturi as stator and as the brushless axial flow fan motor of the single-phase DC of Axail air gap type of the nothing structure unshakable in one's determination of the commentaries on classics fan 11 of rotor.In this embodiment, fan motor 8 is light-duty inclined to one side flat structure, and planar dimension is that length * wide size: 40mm * 40mm, axial width are the small-scale structure of the very thin thickness of 10mm.
This fan motor 8, portion has in interior week of the about shell 10 of venturi of depressed part in the central portion and forms in the same way the inner sides of radius direction by resin integral body and extend the motor accommodation section 13 that formed support 12 connects mutually within it.Thus, at the wind path through hole 15 that is formed on the periphery of the bottom electrical motivation accommodation section 13 of the about shell 10 of venturi below axial by the wind that comes by flabellum 14 air-supplies of changeing fan 11.49 expression rotor yokes.
In motor accommodation section 13, be integrally formed in the axially extended bearing pedestal 16 of central portion, ball bearing 17 be set in the upper end of this bearing portion 16; Sliding bearing 18 is set in the bottom, changes the rotating shaft of being fixed on the fan 11 19, thereby commentaries on classics fan 11 can be rotated thereby rotation is bearing in freely.Except that changeing fan 11, rotating shaft 19, magnetic field magnet 24 and rotor yoke 49, all form by resin is whole.
In motor accommodation section 13, a bolt 20 of using at the supporting stator armature that extends above axially on the 180 degree symmetric positions forms by resin is whole.On this pillar 20, install and fix single-phase no iron core stator armature 22 with the aftermentioned method.There is not stator armature 22 unshakable in one's determination, single phase configuration ground assembling 2 armature coil 9-1,9-2 on the circular stator yoke 21 of the thin thickness that forms the armature coil installation base plate.In order to form the brushless axial flow fan motor 8 of the single-phase DC of the good Axail air gap type of efficient, armature coil 9-1,9-2 are: provide radially the subtended angle of the 9a of active conductor portion of the generation torque of extending and 9b to form with wide hollow type of the wide equal wide π of the being subtended angle of subtended angle of a magnetic pole of field pole 24.
The annular stator yoke 21 that the bolt of being made by magnet 23 is passed in closed magnetic field magnet 24 magnetic circuits (in this embodiment, this stator yoke 21 is the armature coil installation base plate) go up formed through hole 25 and formed through hole 27 on annular printing (wiring) substrate 26, and screw in the screw 28 at above-mentioned pillar 20 tops, by stator armature 22 being installed and fixed on the above-mentioned pillar 20, the nothing of single phase configuration stator armature 22 unshakable in one's determination is located in the magnetic field of magnetic field magnet 24.Thus, formed the self-starting usefulness reluctance torque generation device magnet or the magnet projection that are used for from θ position, configuration angle, deviating from torque, can access the brushless axial flow fan motor 8 of the single-phase DC of the Axail air gap type of deviating from torque that can not be constrained on the above-mentioned dead-centre position thereby formed above-mentioned magnetic field magnet 24 to the dead point as the dead-centre position 0＜θ＜pi/2 (π is 180 degree angles of electrical degree) of above-mentioned armature coil 9-1,9-2 energising switching point.
When stator armature 22 was fixed to the top of pillar 20, this single-phase brushless single phase fan motor 8 just must form through hole 25,27 to allow to screwing in above-mentioned bolt 23 on the self-starting desired location on stator yoke 21 and tellite 26.
On stator yoke 21, outside above-mentioned through hole 25, locate, facing to the Magnetic Sensor accommodation hole 29 of Magnetic Sensor 30 such as the Hall element of the position detecting element work of expression (with reference to Fig. 3) and Hall IC on the position of the 9b of active conductor portion that armature coil 9-1 radially extends, being formed for holding, to hold the Magnetic Sensor 30 (with reference to Fig. 3) that is installed on printed base plate 26 upper surfaces as Fig. 1.Why forming magnetic sensing accommodation hole 29 at two places of symmetrical stator yoke 21 positions of 180 degree, is in order to make spin balancing good.Like this, in the Magnetic Sensor accommodation hole 29 of opposite side, do not hold Magnetic Sensor.
On the lower surface of printed base plate 26,2 IC31 that are used for drive circuit (circuit for controlling electricity turning) are installed, simultaneously, be electrically connected by solder etc. and be fixed on printed base plate 26 formed not shown conductive lead wire patterns and lead-in wire 32.And, be well though constitute by 1 IC31 that is used for drive circuit in the present embodiment, in order to use 2 the situation that is divided into to migrating of other motor.
Upper surface installed 1 Magnetic Sensor 30 and lower surface is installed the printed base plate 26 usefulness adhesive of the IC31 that is used for circuit for controlling electricity turning and to its upper surface 2 armature coil 9-1 has been installed, on the lower surface of the stator yoke 21 of 9-2, form no stator armature 22 unshakable in one's determination thus, alternately be fixed on the N utmost point that changes on the fan 11 by the axial air-gap 33 that radially extends with having, 4 extremely flat magnetic field magnets 24 of S utmost point permanent magnet form relative rotation, it is opposed to constitute the surface like this, thus, the nothing of Magnetic Sensor 30 and single phase configuration stator armature 22 unshakable in one's determination is arranged in the magnetic field of magnetic field magnet 24.
Above-mentioned commentaries on classics fan 11 design like this constitutes: its center of gravity is positioned at the top of bearing pedestal 16.Thus, thereby the center of gravity position of Zhi Chengzhuan fan 11 is come on the top that ball bearing 17 is set to above-mentioned bearing pedestal 16 with ball bearing 17, lower end part at bearing pedestal 16 installs cheap sliding bearing 18, thus, retrain rotating shaft 19 diametrically by this sliding bearing 18 and remain on predetermined angular with interior gradient.
In brushless single phase motor, if any self-starting processing unit is not set, once brushless single phase motor by chance is in the dead-centre position, detect the N utmost point magnetic pole of magnetic field magnet 9 and the no magnetic pole position in the middle of the S utmost point magnetic pole by Magnetic Sensor owing to this moment, just can not send output signal from Magnetic Sensor, though and himself energising of armature 9-1,9-2 but because it is for can not produce the layout of torque conditions, although the shortcoming that just has in armature coil 9-1,9-2 this brushless single phase motor of energising can not self-starting rotate.
For this reason, for brushless single phase motor, no matter the stop position of magnetic field magnet 24 (changeing fan 11), if must switch in armature coil 9-1,9-2, this magnetic field magnet 24 will inevitably the self-starting rotation.Promptly, on dead-centre position as the energising switching point of above-mentioned armature coil 9-1,9-2, in torque on the electromagnetic torque curve 1-1 of Figure 13 (a) is on zero the dead point, must arrive the dead point and deviate from torque, and above-mentioned magnetic field magnet 24 is just inevitable can not to be constrained on the above-mentioned dead-centre position.
And brushless single phase motor (brushless single phase fan motor 8) is in order can cheaply to constitute as the reason of single-phase energized structural, and if be provided for deviate from torque to the dead point device for costliness, will break away from original purpose.
Therefore,, utilize for intact stator armature 22 bolt employed bolt 23 of making by magnet to the pillar 20, be used as to such an extent that deviate from the device of torque to the dead point for the brushless single phase fan motor 8 of present embodiment.
For the torque that do not have that obtains as shown in figure 15 is the synthetic like this torque curve of the synthetic torque curve 2-3 of ideal of zero dead-centre position, this magnet bolt 23 places from providing to armature coil 9-1 shown in Figure 4, the conductor portion 9b position of the generation torque that the 9-2 radial direction extends is towards with by on the position as the wide angle of about 1/4th magnetic poles of the opposite direction of rotation shifting magnetic field magnet 24 of the indicated direction of rotation of magnetic field magnet 24 arrow A directions of rotor (mechanical angle is 22.5 degree), to above-mentioned pillar 20, it is fixing that stator armature 22 is positioned in this this magnet bolt screw fixed.
Why on the homophase position of 180 degree symmetries 2 bolts 23 being set, is in order to reduce the whirling vibration of machinery, change fan 11 and can smoothly rotate placidly and make, still, even have only 1 also to be good.And in armature coil 9-1,9-2, circumferential conductor portion 9c, 9d do not provide the conductor part that torque takes place, it is conductor portion 9a, the 9b that radial direction extends that the conductor part that torque takes place is provided, so, preferably above-mentioned magnet bolt 23 place by conductor portion 9a towards the directional reference opposite with arrow A remove on the position of above-mentioned angle (mechanical angle be 22.5 degree).Promptly, because two places are provided with above-mentioned bolt 23, under the situation of using 4 pole field magnets 24, the homophase position of above-mentioned bolt 23, the position 34 that dotted line surrounded as shown in Figure 4,35 positions, also can screw fixed bolt 23 at 34,35 places, such position, perhaps, from these homophase positions, select the position more than any, screw fixed bolt 23.
The position of screw fixed bolt 23 is such positions: from as the dead-centre position 0＜θ＜π 2 of above-mentioned armature coil 9-1,9-2 energising switching point (π is 180 degree angles on the electrical degree, thus when using 4 pole field magnets 24 as mechanical angle 90 spend=π) θ position, configuration angle on screw fixed be used for deviate from torque to the dead point magnet bolt 23 above-mentioned magnetic field magnets 24 can access the torque of deviating from that is not constrained on the above-mentioned dead-centre position.
And, as as indicated in curve 1-1, the 2-3,5 of Figure 15, from the position of the breakdown torque that obtains electromagnetic torque curve 2-3 with on the position that circumferentially moves past the wide angle of 1/4th magnetic poles (mechanical angle is 22.5 degree) of the direction opposite with arrow A, be used for the reluctance torque that deviate from the dead point by bolt 23 generations, thereby obtain reluctance torque curve 2-3.
Therefore, in this embodiment, from provide torque takes place armature coil 9-1,9-2 the 9b of active conductor portion with towards with the rightabout position that circumferentially moves past the wide angle of 1/4th magnetic poles (mechanical angle is 22.5 degree) of arrow A on the above-mentioned bolt 23 of screw fixed.
And the crest portion by the resulting electromagnetic torque curve 1-1 of energising in armature coil 9-1,9-2 is the position that obtains maximum electromagnetic torque, and this part provides armature coil 9-1,9-2 the conductor portion 9a of torque or the position of 9b take place.Produce by this part 9a or 9b and to be used for the reluctance torque that deviate from the dead point, perhaps resemble hope and obtain illusion the reluctance torque curve 2-3.And conductor portion 9a or the 9b that provides armature coil 9-1,9-2 that torque takes place is provided in such position, can not screw fixed bolt 23.Relevant portion is with very approaching position, dead-centre position.Like this, if not setting screw set bolt 23 quite correctly, if or do not select to be used to produce the bolt 23 of reluctance torque that can the self-starting size really, probably the single-phase dish-type brush-less fan motor 8 that is parked on the dead-centre position of magnetic field magnet 24 just can not self-starting, thus magnet bolt 23 screw fixed to above-mentioned position.
Fig. 5 is the armature coil 9-1 of magnetic field magnet 24 and single phase configuration, the expanded view of 9-2, armature coil 9-1,9-2 are arranged to the equidistant placement that mechanical angle is 180 degree pitches, the conductor portion 9a of generation torque and the subtended angle width of 9b are provided, the angle of a magnetic pole that forms magnetic field magnet 24 wide (mechanical angle is 90 degree, and electrical degree is 180 degree) is wide.
The terminal of conductor portion 9b that armature coil 9-2 opposite side generation torque is provided is with by the tie-point electrical connection of 2 drive circuits with the collector circuit of the collector circuit of the PMP type triode 37 in the semiconductor rectifier equipment (so-called drive circuit, convertor assembly) that IC31 constituted 36 and NPN type triode 38.Provide the terminal of the conductor portion 9a of armature coil 9-1 one side generation torque to be electrically connected with the tie-point of the collector circuit of the PMP type triode 38 in the semiconductor rectifier equipment 36.Provide the terminal of the conductor portion 9a of armature coil 9-1 one side generation torque to be electrically connected with the tie-point of the collector circuit of the collector circuit of the PMP type triode 38 in the semiconductor rectifier equipment 36 and NPN type triode 39.Provide the terminal of the conductor portion 9a of armature coil 9-2 one side generation torque to be electrically connected with the terminal that provides another survey of armature coil 9-1 that the conductor portion 9b of torque takes place.Triode 37 and 38 emitter circuit are electrically connected each other, are electrically connected with positive power terminal 41 sides.Triode 40 and 39 emitter circuit are electrically connected each other, are electrically connected with negative power source terminal 42 sides.Triode 37 and 39 base circuit are electrically connected each other, same Magnetic Sensor (than the time use 4 terminal Hall elements) a side lead-out terminal 43-1 of 30 is electrically connected; Triode 38 and 40 base circuit are electrically connected each other, and the opposite side lead-out terminal 43-2 of same Magnetic Sensor (using 4 terminal Hall elements this moment) is electrically connected.
In Fig. 5, express such state: by the magnetic field magnet 24 shown in the dotted line, bolt 23 is inhaled mutually with magnetic field magnet 24 magnetic and is settled out when no power, magnetic field magnet 24 stops, the position of relevant magnetic field magnet 24 is indicated by the expanded view of Fig. 5, just become the state that Magnetic Sensor 30 must detect the magnetic pole of the N utmost point of magnetic field magnet 24 or the S utmost point, so can make 8 self-startings of brushless single phase fan motor really.
Like this, with reference to Fig. 5, Magnetic Sensor 30 has detected the N utmost point magnetic pole of the magnetic field magnet 24 that is illustrated by the broken lines, so, make triode 37 and 39 conductings by a side lead-out terminal 43-1, owing to the electric current of circulation arrow B direction in armature coil 9-1,9-2 obtains the rotating torques of arrow A direction, so magnetic field magnet 24 (changeing fan 11) is rotated to the direction of arrow A.
Once field pole 24 (changeing fan 11) rotates about 1/4th magnetic poles to the direction of arrow A, thereby armature coil 9-1,9-2 just produce maximum starting torque relatively together with the field pole 24 that solid line among Fig. 5 is represented.If from just producing maximum starting torque at first, in fact loss during by starting makes degradation in efficiency, but, after having rotated 1/4th such magnetic pole angles, magnetic field magnet 24 produces maximum starting torque again, loss when just not starting, and can obtain the good brushless single phase fan motor 8 of efficient.
After obtaining maximum starting torque, and then, 24 rotations of magnetic field magnet, at this moment, Magnetic Sensor 30 detects the S utmost point magnetic pole of magnetic field magnet 24, make triode 38 and 40 conductings by opposite side lead-out terminal 43-2, owing to the reciprocal electric current of circulation in armature coil 9-1,9-2 obtains the rotating torques of arrow A direction, then magnetic field magnet 24 (changeing fan 11) continues to rotate to the arrow A direction.By carrying out above-mentioned action repeatedly, brushless single phase fan motor 8 rotates continuously.
Fig. 6 owing to represented an example of concrete semiconductor rectifier equipment 36, just becomes single-phase reciprocal power-on circuit.
With reference to Fig. 6, once Magnetic Sensor 30 detects the N utmost point of magnetic field magnet 24, thereby will make 44 conductings of positive-negative-positive triode make 45 conductings of NPN type triode by lead-out terminal 43-1, make triode 37,39 conductings, will in armature coil 9-1,9-2, switch on arrow B direction shown in Figure 6, thereby produce the rotating torques of above-mentioned arrow A direction, the magnetic field magnet is rotated on the arrow A direction.Then, once Magnetic Sensor 30 detects the S utmost point of field pole 24, thereby will make 46 conductings of positive-negative-positive triode make 47 conductings of NPN type triode by lead-out terminal 43-2, make triode 38,40 conductings, thereby in armature coil 9-1,9-2, switch on the direction opposite with arrow B, produce the rotating torques of above-mentioned arrow A direction, magnetic field magnet 24 is rotated on the arrow A direction.
Fig. 7 represents the exploded perspective view of Axail air gap type (dish-type) the brushless single phase fan motor 8-1 of the present invention the 2nd embodiment.And, omitted with above-mentioned dish-type brushless single phase fan motor 8 in the position description that repeats mutually of illustrated position.
In this dish-type brushless single phase fan motor 8-1, do not establish special self-starting processing unit, by only carrying out giving the shape change of the stator yoke of using earlier, just can self-starting.
Stator yoke 21-1 not only has the function of the magnetic circuit that is used for closed magnetic field magnet 24, and has as the function that is used to make this dish-type brushless single phase fan motor self-running reluctance torque generation part of 8-1 (cogging torque).Therefore, in this brushless single phase fan motor 8-1, on stator yoke 21-1, form the notch part 48 of the such shape of this brushless single phase fan motor 8-1 energy self-starting.But, only form notch part, just can not make fan motor 8-1 self-starting with optimal method, below the notch part of needs and the position that should form are described.
On said stator yoke 21-1, form 1 notch part 48 that is used to produce reluctance torque that self-starting is used.This notch part 48 forms: make the subtended angle of its circumferential breach end 48a and 48b equal with the angle of a magnetic pole of magnetic field magnet 48 wide (the π angle is wide).Breach end 48a, 48b promptly upwards extend and form in the footpath at the magnetic air gap bearing of trend.
Once form the wide notch part 48 of relevant mechanical angle 90 degree subtended angles on stator yoke 21-1, just can obtain really can self-running dish-type brushless single phase fan motor 8-1.As the reason of the wide notch part 48 of mechanical angle 90 degree subtended angles be because magnetic field magnet 24 be 4 utmost points then each magnetic pole of the N utmost point, the S utmost point be that 90 degree subtended angles are wide.
Once form such notch part 48, when no power, this brushless single phase motor 8-1 (magnetic field magnet 24) will be parked on the position that its both ends 48a, 48b balance each other at the magnetic balance point place with magnetic field magnet 24.At this moment, if in hollow type armature coil 9-1,9-2, switch on, by according to the rotating torques that not comes bright left hand rule and produced, magnetic field magnet 24 must rotate to arrow A direction (with reference to Fig. 1, Fig. 5), on such position, 2 armature coil 9-1,9-2 are installed on the stator yoke shown in Figure 7 on the 21-1.
By above-mentioned shortcoming portion 48 and armature coil 9-1,9-2, in order to make this brushless single phase motor 8-1 can carry out required self-starting, the breach end 48a of above-mentioned notch part 48 is on such position: from the 9b of active conductor portion (this position is the position that obtains maximum starting torque) of armature coil 9-2 to magnetic field magnet 24 reverse directions (with the arrow A rightabout) about in advance n π/4 (n be no more than magnetic field magnet 24 number of magnetic poles greater than 1 integer) wide (when the N of magnetic field magnet 24 utmost point or the S utmost point wide is that a magnetic pole of magnetic field magnet 24 is wide during for the π angle), above-mentioned stator yoke 21-1 is installed like this.
In this embodiment, wide from the armature coil 9-2 active conductor 9b of portion that obtains breakdown torque to leading 1/4th magnetic poles of reverse directions (with the arrow A rightabout) be the breach end 48a of locating notch portion 48 on the position of mechanical angle 22.5 degree, stator yoke 21-1 is installed like this.Thus, though do not adopt expensive especially self-starting processing unit, also can make this brushless single phase motor 8-1 carry out the self-starting rotation really.And, having in use under the situation of stator yoke 21-1 of this notch part 48, bolt 23 is without magnet, but the nonmagnetic body bolt also is good.
On said stator yoke 21-1, formed another notch part 64 together with above-mentioned notch part 48, but this notch part 64 not in order to produce reluctance torque that self-starting uses.In order to make brushless single phase fan motor 8-1 self-starting really, for paralleling ground, the pole boundary portion with the N utmost point of magnetic field magnet 24 and the S utmost point relatively forms like this by breach end 48a, the 48b of notch part 48, what eliminate some structures that produce big reluctance torque, and magnetic field magnet 24 is smoothly rotated, to seek to vibrate the reduction with noise.
Fig. 8 is the plane graph that the single phase configuration of expression the present invention the 3rd embodiment does not have iron core stator armature 22-2, is formed in the stator yoke 21-2 that forms a magnetic pole wide angle and wide notch part 48-1 of 2 magnetic field magnets 24 on the symmetrical homophase position of 180 degree.
It is on the position of mechanical angle 22.5 degree angles that notch part 48-1 one side breach end 48a is positioned respectively conductor portion 9b from the side generation torque that armature coil 9-1,9-2 are provided wide towards leading 1/4th magnetic poles of reverse directions (direction opposite with arrow A); And it is that mechanical angle 22.5 is spent on the position of angles that the breach end 48b of notch part 48-1 opposite side is positioned wide to leading 1/4th magnetic poles of reverse directions (direction opposite with arrow A) from the conductor portion 9a that armature coil 9-1,9-2 opposite side generation torque are provided respectively, and stator yoke 21-2 is set like this.By leave 2 such notch part 48-1 of formation on the position in even numbered poles, just reached the purpose of fine balance generation reluctance torque, thus, magnetic field magnet 24 (changeing fan 11) just can smoothly and placidly rotate.
Fig. 9 be the single phase configuration of expression the present invention the 4th embodiment do not have a stator armature 22-3 unshakable in one's determination lower surface figure (still, for the ease of with the aid of pictures, draw stator yoke 21-3 with solid line), use the semicircle stator yoke 21-3 in plane that has with the formed notch part 48-2 of 180 degree (angles of electrical degree 2 π) reply angular widths.
By the wide notch part 48-2 of 180 degree subtended angles, the area that exposes of the printed base plate 26 that different stator yoke 21-3 are relative has just increased, and just can easily install the electric component that constitutes semiconductor rectifier equipment (drive circuit) on these printed base plate that exposes 26 surfaces.
Breach end 48a, the 48b of notch part 48-2 is positioned to surpass 1/4th magnetic poles wide from the conductor portion 9a of the generation torque that each armature coil 9-1,9-2 are provided towards reverse directions (direction opposite with arrow A) respectively and is that mechanical angle 22.5 is spent on the position of angles, stator yoke 21-3 is set like this.Magnetic Sensor 30 is installed on the lower surface position of the relative conductor portion 9a that armature coil 9-1 generation torque is provided of different stator yoke 21-3, thereby easily carries out holding of this Magnetic Sensor 30.
Figure 10 is the stereogram of the stator yoke 21-4 of expression the present invention the 5th embodiment, Figure 11 is the plane graph of the nothing of the 5th embodiment stator armature 22-4 unshakable in one's determination, thereby produces the little single-phase DC brush-less fan motor of reluctance torque noise vibration that self-starting is used more smoothly by the stator yoke 21-2 notch part 48-1 that the notch part 48-4 of stator yoke 21-4 just can access than Fig. 8.
This notch part 48-3 is: thus the side of the limit 48c of the breach end 48b of connection layout 8 notch part 48-1 and 48a is continued to prolong formation notch part 48 ' a to peripheral direction at breach end 48a.Like this, because breach end 48b is parallel by the N utmost point of magnetic field magnet 24 and the pole boundary portion of S utmost point magnetic pole, produce energy by this breach end 48b and deviate to use reluctance torque in the dead point of self-starting size really, and for opposite side breach end 48 ' a, owing to pass through with the N utmost point of magnetic field magnet 24 and the pole boundary portion of S utmost point magnetic pole with tilting, make by the resulting dead point of 48b, breach end deviate from become with reluctance torque level and smooth.Thus, carry out the rotation of magnetic field magnet 24 smoothly.
Figure 12 is the plane graph of the single-phase no stator armature 22-5 unshakable in one's determination of expression the present invention the 6th embodiment.And in this Figure 12, it is all right to use any above-mentioned dead point to deviate from the reluctance torque generating means, so just not described.For above-mentioned nothing stator armature 22 unshakable in one's determination, 22-1 ..., 22-4 is located at stator yoke 21 to printed base plate 26,21-1 ..., on the lower surface of 21-4, drive circuit is installed on the lower surface of this printed base plate 26 with IC31.Like this, Magnetic Sensor 30 and armature coil 9-1, the terminal of 9-2 should all be directed on the lower surface of printed base plate 26 and carry out electrical connecting wires, and be very many when just making solder 2.And, because the IC31 that drive circuit is used must be set on the lower surface of printed base plate 26, must between printed base plate 26 and motor accommodation section 13, be formed for holding the IC31 that drive circuit is used, its structure, have to adopt the method that forms pillar 20 grades, the brushless single phase fan motor is inevitable axially to be thickened.In order to hold Magnetic Sensor 30, must on stator yoke, be formed for holding the through hole of Magnetic Sensor, this Magnetic Sensor accommodation hole produces quiet slot effect, this quiet slot effect can be deviate from the reluctance torque generation baneful influence of torque to being used for the dead point, become and cause self-starting bad, increase the reason of shortcomings such as mechanical oscillation.
Therefore, in this embodiment, relatively dispose stator yoke and printed base plate 26, thereby single phase configuration ground installation armature coil 9-1,9-2 form single-phase no stator armature 22-5 unshakable in one's determination on printed base plate 26.And, drive circuit IC31 ' is set on the appropriate location on printed base plate 26 surfaces, the Magnetic Sensor 30 in the magnetic field of detecting above-mentioned magnetic field magnet 24 is arranged on from providing on torque takes place armature coil 9-1 conductor 9b printed base plate 26 positions and relative above-mentioned printed base plate 26 surface locations of different this armature coil 9-1,9-2 to internal diameter direction prolongs.By Magnetic Sensor 30, armature coil 9-1,9-2, drive circuit all are arranged on such printed base plate 26 surfaces with IC31 ', in when seeking to reduce solder 2, assemble easily, thereby can form the brushless single phase fan motor at an easy rate.Thus, just can easily form slim brushless single phase fan motor.And label 65 is terminals of armature coil 9-1,9-2, and this terminal 65 is soldered on printed base plate 26 surfaces by slicken solder.And in Figure 12, though N, S label are marked on the periphery, this is in order to show the correspondence with magnetic field magnet 24.
In the above-described embodiments, although represented to use the example of 2 armature coils, if can form single-phase no stator armature unshakable in one's determination, its number also can be more than 1 or 3.And, though the magnetic field magnet uses 4 utmost points, also can use 2 utmost points, 6 extremely above.Although be that brushless single phase motor with the Axail air gap type structure is that the center describes, much less technological thought of the present invention expanded in the brushless single phase motor of cylindrical shape radial air gap type structure and also be fine.As being used to obtain the reluctance torque production part of deviating from torque that self-starting is used,, also can install as the magnet projection with other though use the magnet bolt as the magnet projection.Go out the reluctance torque production part of torque as being used to obtain a word used in place name that self-starting uses, though form notch part on stator yoke, much less this notch part both can be that depressed part also can be the notch part and the depressed part of other shapes.
The present invention, the part of utilization parts that use in former motor etc., only by carrying out improvement slightly, just can obtain motor and self-starting really near desirable synthetic torque curve, thus can obtain easily thin thickness, light-duty, the property produced in batches is good, can the cheap brushless single phase motor of producing in batches.
The drawing explanation:
Fig. 1 is the exploded perspective view of dish-type single-phase (DC) the brush-less fan motor of expression the present invention the 1st embodiment;
Fig. 2 is the longitudinal section of this fan motor;
Fig. 3 is that Magnetic Sensor is provided with position view;
Fig. 4 deviates from torque and the optimum position schematic diagram of screw fixed magnet bolt in order to arrive the dead point;
Fig. 5 is the expanded view of magnetic field magnet with the armature coil group of single phase configuration;
Fig. 6 is the drive circuit schematic diagram that constitutes as the single-phase power-on circuit of an example;
Fig. 7 is the exploded perspective view of dish-type single-phase (DC) the brush-less fan motor of expression the present invention the 2nd embodiment;
Fig. 8 is the plane graph of the single-phase no stator armature unshakable in one's determination of expression the present invention the 3rd embodiment;
Fig. 9 is the ground plan of the single-phase no stator armature unshakable in one's determination of expression the present invention the 4th embodiment;
Figure 10 is the stereogram of the stator yoke of expression the present invention the 5th embodiment;
Figure 11 is the plane graph of the single-phase no stator armature unshakable in one's determination of expression the present invention the 5th embodiment;
Figure 12 is the plane graph of the single-phase no stator armature unshakable in one's determination of expression the present invention the 6th embodiment;
Figure 13 is the electromagnetic torque of brushless motor and the schematic diagram of synthetic torque curve;
Figure 14 is the principle schematic of brushless single phase motor;
Figure 15 is the schematic diagram of existing brushless single phase motor.
Wherein:
1-1 ..., 1-4: electromagnetic torque curve
2-1 ..., 2-3: synthetic torque curve
3-1,3-2: dead point
4: radial air gap
5: the reluctance torque curve
6: the stator armature iron core
7: the prominent utmost point unshakable in one's determination
8,8-1: Axail air gap type single-phase (DC) brush-less fan motor
9,9-1,9-2: armature coil
9a, 9b: the active conductor portion that torque takes place is provided
9c, 9d: the conductor portion that torque takes place is not provided
10: the about shell of venturi
11: change fan
12: support
13: the motor accommodation section
14: impeller (rotation flabellum)
15: ventilation hole
16: bearing pedestal
17: ball bearing
18: sliding bearing
19: rotating shaft
20: the stator armature support column
21,21-1 ..., 21-4: stator yoke
22,22-1 ..., 22-4: single-phase nothing stator armature unshakable in one's determination
23: the magnet bolt
24,24 ': the magnetic field magnet
25: through hole
26: printing (wiring) substrate
27: through hole
28: bolt hole
29: the Magnetic Sensor accommodation hole
30: Magnetic Sensor
31,31 ': drive circuit (circuit for controlling electricity turning) IC
32: lead-in wire
33: axial air-gap
34,35: the dotted line part
36: semiconductor rectifier equipment (drive circuit)
37,38:PNP type triode
39,40:NPN type triode
41: positive power terminal
42: negative power source terminal
43-1,43-2: lead-out terminal
44:PNP type triode
45:NPN type triode
46:PNP type triode
47:NPN type triode
48: notch part
48a, 48b: breach end
49: rotor yoke
50: two-sided tape
51 ..., 63: resistance
64: notch part
65: terminal
66: scolder
Claims (21)
1. brushless single phase motor, comprising having P to (P is the integer more than 1) the N utmost point, the magnetic field magnet of S utmost point magnetic pole is as rotor, comprise that also single-phase energising is configured in the individual armature coil of n (n is the integer more than 1) in the magnetic field of this magnetic field magnet and detects the checkout gear in the magnetic field of above-mentioned magnetic field magnet, it is characterized in that, be provided for to such an extent that deviate from the magnet of torque to the dead point from θ position, configuration angle as dead-centre position to the 0＜θ＜pi/2 (π is that electrical degree is set at 180 degree angles) of above-mentioned armature coil energising switching point, self-starting reluctance torque generation devices such as magnet depressed part such as magnet projection or notch part are not constrained on the torque of deviating from the above-mentioned dead-centre position thereby can access above-mentioned magnetic field magnet.
2. brushless single phase motor according to claim 1, it is characterized in that: be provided for producing the magnet depressed parts such as magnet, magnet projection or notch part of self-starting usefulness reluctance torque from dead-centre position to the about π of reverse directions/position of 4 configuration angle θ, be not constrained on the torque of deviating from the above-mentioned dead-centre position thereby can obtain above-mentioned magnetic field magnet as above-mentioned armature coil energising switching point.
3. brushless single phase motor according to claim 1, it is characterized in that magnet depressed parts such as above-mentioned notch part form like this: the breach end of a circumferential side be positioned from as the dead-centre position of the energising switching point of armature coil on the position of the about π of reverse directions/4 configuration angle θ.
4. brushless single phase motor according to claim 1 is characterized in that, above-mentioned reluctance torque produces magnet, magnet projection or the magnet depressed part of usefulness, and the direction that its at least a portion is extended along magnetic air gap is extended and formed.
5. brushless single phase motor according to claim 2 is characterized in that, above-mentioned reluctance torque produces magnet, magnet projection or the magnet depressed part of usefulness, and the direction that its at least a portion is extended along magnetic air gap is extended and formed.
6. brushless single phase motor according to claim 3 is characterized in that, above-mentioned reluctance torque produces magnet, magnet projection or the magnet depression of usefulness, and the direction that its at least a portion is extended along magnetic air gap is extended and formed.
7. brushless single phase motor according to claim 1 is characterized in that, the above-mentioned magnet projection that is used to produce reluctance torque is the magnet bolt that is used for that above-mentioned armature coil is arranged on the printed base plate in the above-mentioned magnetic field or is used for fixing parts such as stator yoke.
8. brushless single phase motor according to claim 2 is characterized in that, the above-mentioned magnet projection that is used to produce reluctance torque is the magnet bolt that is used for that above-mentioned armature coil is arranged on the printed base plate in the above-mentioned magnetic field or is used for fixing parts such as stator yoke.
9. brushless single phase motor according to claim 1 is characterized in that, the above-mentioned magnet depressed part that is used to produce reluctance torque is being used for that magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field is cut into breach and the notch parts such as through hole that form.
10. brushless single phase motor according to claim 2, it is characterized in that the above-mentioned magnet depressed part that is used to produce reluctance torque is being used for that magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field is cut into breach and the notch parts such as through hole that form.
11. brushless single phase motor according to claim 3, it is characterized in that the above-mentioned magnet depressed part that is used to produce reluctance torque is being used for that magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field is cut into breach and the notch parts such as through hole that form.
12. brushless single phase motor according to claim 4, it is characterized in that the above-mentioned magnet depressed part that is used to produce reluctance torque is being used for that magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field is cut into breach and the notch parts such as through hole that form.
13. brushless single phase motor according to claim 5, it is characterized in that the above-mentioned magnet depressed part that is used to produce reluctance torque is being used for that magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field is cut into breach and the notch parts such as through hole that form.
14. brushless single phase motor according to claim 6, it is characterized in that the above-mentioned magnet depressed part that is used to produce reluctance torque is being used for that magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field is cut into breach and the notch parts such as through hole that form.
15. according to each described brushless single phase motor of claim 1 to 14, it is characterized in that, the terminal of above-mentioned armature coil, by notch part such as formed through hole on being used for the magnet assembly that closure is located at the magnetic circuits such as stator yoke in the above-mentioned magnetic field, thereby be directed to the drive circuit side that on the opposite face of what is called, is had, so that carry out electrical wiring with this drive circuit side with the relative stator yoke surface of above-mentioned magnetic field magnet.
16. according to each described brushless single phase motor of claim 1 to 14, it is characterized in that, the checkout gear that detects the magnetic field of above-mentioned magnetic field magnet is a Magnetic Sensor, this magnetic sensor configuration on comprising with the position on this conductor portion extended line that the relative position of the conductor portion of armature coil generation torque is provided.
17. brushless single phase motor according to claim 15, it is characterized in that, the checkout gear that detects the magnetic field of above-mentioned magnetic field magnet is a Magnetic Sensor, this magnetic sensor configuration on comprising with the position on this conductor portion extended line that the relative position of the conductor portion of armature coil generation torque is provided.
18. brushless single phase motor according to claim 16, it is characterized in that above-mentioned Magnetic Sensor is arranged on and is used for closure and is located at notch part positions such as formed through holes on the magnet assembly that the magnetic circuits such as stator yoke in the relative above-mentioned magnetic field of the conductor portion of armature coil generation torque are provided.
19. brushless single phase motor according to claim 17, it is characterized in that above-mentioned Magnetic Sensor is arranged on and is used for closure and is located at notch part positions such as formed through holes on the magnet assembly that the magnetic circuits such as stator yoke in the relative above-mentioned magnetic field of the conductor portion of armature coil generation torque are provided.
20. brushless single phase motor according to claim 16, it is characterized in that, above-mentioned brushless single phase motor, as the axial air-gap structure, on by the air gap armature coil installation base plate surface relative with above-mentioned magnetic field magnet, armature coil is set to single phase configuration and the circuit elements such as IC that drive circuit is used are installed simultaneously, the Magnetic Sensor in the magnetic field of detecting above-mentioned magnetic field magnet is arranged on as on the relative above-mentioned armature coil installation base plate surface of position on the conductor portion internal diameter direction extended line that armature coil generation torque is provided and this armature coil of difference.
21. brushless single phase motor according to claim 17, it is characterized in that, above-mentioned brushless single phase motor, as the axial air-gap structure, on by the air gap armature coil installation base plate surface relative with above-mentioned magnetic field magnet, armature coil is set to single phase configuration and the circuit elements such as IC that drive circuit is used are installed simultaneously, the Magnetic Sensor in the magnetic field of detecting above-mentioned magnetic field magnet is arranged on as on the relative above-mentioned armature coil installation base plate surface of position on the conductor portion internal diameter direction extended line that armature coil generation torque is provided and this armature coil of difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94102669A CN1056480C (en) | 1994-01-28 | 1994-01-28 | Single phase brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94102669A CN1056480C (en) | 1994-01-28 | 1994-01-28 | Single phase brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1124883A CN1124883A (en) | 1996-06-19 |
| CN1056480C true CN1056480C (en) | 2000-09-13 |
Family
ID=5030754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94102669A Expired - Fee Related CN1056480C (en) | 1994-01-28 | 1994-01-28 | Single phase brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1056480C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013005533A (en) * | 2011-06-14 | 2013-01-07 | Semiconductor Components Industries Llc | Drive circuit of single-phase brushless motor |
| KR101916265B1 (en) * | 2016-04-07 | 2018-11-07 | 주식회사 아모텍 | Slim Type Stator, Sensorless Type Single Phase Motor and Cooling Fan Using the Same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6359756A (en) * | 1986-08-27 | 1988-03-15 | Shicoh Eng Co Ltd | Single phase brushless motor |
-
1994
- 1994-01-28 CN CN94102669A patent/CN1056480C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6359756A (en) * | 1986-08-27 | 1988-03-15 | Shicoh Eng Co Ltd | Single phase brushless motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1124883A (en) | 1996-06-19 |
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