CN104079136A - Three-phase switch reluctance machine and sine stator - Google Patents
Three-phase switch reluctance machine and sine stator Download PDFInfo
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- CN104079136A CN104079136A CN201410326346.0A CN201410326346A CN104079136A CN 104079136 A CN104079136 A CN 104079136A CN 201410326346 A CN201410326346 A CN 201410326346A CN 104079136 A CN104079136 A CN 104079136A
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Abstract
Provided are a three-phase switch reluctance machine and a sine stator. A plurality of teeth 5 and a plurality of teeth 4 are arranged at intervals in the circumferential direction, and the width of the tooth body of each tooth 5 is twice or more that of the tooth body of the corresponding tooth 4. Each iron core magnetic pole is composed of one tooth 5, one left tooth 4 and one right tooth 4, wherein the tooth 5 is the main part, the left tooth and the right tooth are the auxiliary parts, and air gaps of the polar arc faces of the three teeth are distributed in a sine rule. By the utilization of the characteristic of interphase magnetic pole sharing of the teeth 4, a beneficial reverse electromotive force current magnetic field generated by power current in a coil is switched off at proper moment in the phase changing process, the effect of interphase pole field fused connection is achieved, the effect similar to a circular rotating magnetic field is generated, and therefore the pulsation phenomenon of the motor is further reduced, the motor can be started smoothly, the manufacturing cost is low, noise and energy consumption are reduced, and efficiency and torque are further improved.
Description
Technical field
This technology relates to machine field, especially a kind of threephase switch reluctance motor.
Background technology
Threephase switch reluctance motor is the one of motor, in its motor stator core circle, is provided with convex tooth, and single double wedge is coiled into a utmost point, and salient pole is equal distribution on circle.One phase magnetic pole is for radially a pair of.Being generally that rotor is that 4 salient poles, stators are that 6 salient poles or rotor are that 6 salient poles, stators are 8 salient poles or above double-salient-pole switched reluctance machines, is only iron core on rotor.When energising, by position transducer, electronic commutator, each phase coil on stator is switched in order one by one, on stator core, produce the rotating magnetic field of three-phase symmetrical, rotor driven rotation respectively.
For adopting position transducer and the supporting threephase switch reluctance motor of controlling running of electronics phase changer, due to motor double-salient-pole structure, there is between phase and phase certain distance at present, make motor produce pulsation and noise.Its reason is commutation period, although the switch of going up mutually turn-offs, due to the existence of motor winding inductance, electric current can not be kept to zero once, always can carry out afterflow by corresponding fly-wheel diode, decays to zero thereupon again, produces negative torque.Secondly at non-commutation period, the variation of electric machine phase current also can cause electromagnetic torque pulsation.
The method reducing for motor torque ripple at present is mainly increasing in rotor number of poles and Optimal Control Strategy.
Summary of the invention
For existing threephase switch reluctance motor Shortcomings, the technical program is by changing motor stator shape, makes that pole span shortens, three tooth polar arc face air gaps distribute similar in appearance to being sinusoidal rule changes shape.Utilizing tooth 4 is features total between phase and phase magnetic pole, the source current in good time turn-offing in commutation in coil produces favourable counter electromotive force current magnetic field suction rotor rotation, there is the effect that phase and phase pole field merges handing-over, produce the effect similar in appearance to circular rotating field, make three-phase reluctance motor electromagnetic torque in the time of commutation be unlikely to sudden change, motor operates steadily, reducing noise, and efficiency, torque have further raising.
A kind of threephase switch reluctance motor and sinusoidal stator technical scheme, comprise stator 9 and rotor with salient pole iron core 10.Wherein, be installed on a side collateral branch frame of stator 9 casings and form the signal sampling part in Three-phase electronic commutation circuit device with rotor-position permanent magnet poles 12 by hall position sensor.
Please refer to Fig. 1, a kind of threephase switch reluctance motor and sinusoidal stator technical scheme, there are several teeth 5 to equate by the circular arc distance between circle-shaped alternate intervals arrangement and tooth 5 tooth bodies and the tooth 4 tooth body axle neutral lines with tooth 4, some A phase grooves 6,7 associations of B phase groove between several teeth 5, tooth 4 and groove area equate, tooth 5 tooth body width are the more than two times or two times of tooth 4 tooth body width.
Because the watt level of motor is different, tooth 5 tooth body width and tooth 4 tooth body width are just determined according to power of motor size shape.
Polar arc face air gap 14 between stator 9 winding iron core magnetic poles and rotor with salient pole iron core 10 in the technical program is non-homogeneous air gap, is similar in appearance to the air gap changing by sinusoidal rule.Wherein, tooth 5 cambered surfaces in stator are the mechanical configurations cambered surfaces that change by sinusoidal rule, tooth 5 cambered surface air gaps are the sinusoidal gradual change air gap that intermediate air gap is little, two ends air gap is large, that is: gradually air gap is become to large by sinusoidal rule in two ends taking the tooth 5 tooth body axle neutral lines to the left and right as line of demarcation along tooth 5 cambered surfaces, tooth 4 cambered surface air gaps are even air gap and are a bit larger tham tooth 5 cambered surface two ends air gaps.
The embedding method of single coil is that pole span one is holding taking tooth 4, tooth 5, tooth 4 three teeth as a utmost point across four, one mutually in some single coils connect into a phase winding, every phase winding connects into respectively some magnetic poles symmetrical to number of pole-pairs, and every every utmost point iron core in is mutually that main, left and right tooth 4 is that auxiliary three teeth rearrange and polar arc face air gap is sinusoidal rule distribution shape by tooth 5 respectively.
A phase winding 1 is embedded in 6 li of A phase grooves and is holding tooth 4, tooth 5, tooth 4 three teeth composition A phase core magnetic poles 11 and adjacent B phase winding 2 and be embedded in 7 li of B phase grooves and holding tooth 4, tooth 5, tooth 4 three teeth composition B phase core magnetic poles 22 and adjacent C phase winding 3 and be embedded in 8 li of A phase grooves and holding tooth 4, tooth 5, tooth 4 three teeth and form C phase core magnetic poles 33 120 ° of electrical degrees each other on locus.
Rearrange at tooth 4, tooth 5, tooth 4 three teeth one extremely in, tooth 5 is main tooth, tooth 4 be auxiliary tooth and for phase and phase magnetic pole have, tooth 5 tooth body width are the more than two times or two times of tooth 4 tooth body width.Increase tooth 5 tooth bodies, dwindle tooth 4 tooth body width, on the one hand pole span is diminished, but an extremely total iron core magnetic is close constant, pole span shortens, and coil is just less, and stator coil end length shortens, and coil resistance is little, loss just reduces; Due to only three teeth of the number of teeth of composition one utmost point, from motor on the whole, the stator slot number of teeth is fewer, and teeth groove harmonic content is fewer, and loss will further reduce; Be that master, left and right tooth 4 are that auxiliary three teeth rearrange a utmost point owing to adopting tooth 5, polar arc face air gap is sinusoidal rule distribution shape, makes the mmf wave producing in coil electricity closer to Sine distribution shape.
Described a kind of threephase switch reluctance motor and sinusoidal stator, also configure Three-phase electronic commutation circuit control device, different as required, can adopt closed loop, also can adopt controlling of open loop.
The described every phase winding of stator 9 connects into some magnetic poles symmetrical to number of pole-pairs, identical with rotor with salient pole iron core 10 numbers of pole-pairs.On salient pole iron core 10, there is no winding and permanent magnet poles.
Described rotor-position permanent magnet poles 12 is independently permanent magnet poles, identical with rotor with salient pole iron core 10 numbers of pole-pairs and coaxial same orientation, its both magnetic poles 0 ° of electrical degree each other on locus.
The formation of described a kind of threephase switch reluctance motor can have different number of stator slots and rotor number of poles.
Following table has been listed the corresponding relation of several number of stator slots and rotor number of poles.
| Stator teeth groove number | 12 | 24 | 36 | 48 | 60 |
| Rotor number of poles | 2 | 4 | 6 | 8 | 10 |
Not only only have above-mentioned these corresponding relations, the ratio that can also be six times of rotor numbers of poles according to number of stator slots continues to extend the corresponding relation of stator and rotor.
Described stator 9 iron core width of rebate are 2mm to 3mm.
A utmost point pole span on rotor with salient pole iron core 10 is (0.38～0.42) × π D/P.D is root diameter, and P is rotor number of poles.
In order to determine rotor with salient pole iron core 10 positions, adopt and establish a position transducer in the pole axis neutral line place of 120 ° of electrical degrees each other at three-phase.
Three position transducers are located at respectively the pole axis neutral line place of A phase core magnetic pole 11, B phase core magnetic pole 22, C phase core magnetic pole 33 successively.
A phase magnetosensitive position transducer control B phase winding 2, B phase magnetosensitive position transducer control C phase winding 3, C phase magnetosensitive position transducer control A phase winding 1 is controlled closely linkedly.
In the time that rotor rotates, the permanent magnet poles N utmost point and the S utmost point are in turn by Hall element H1, H2, H3, thereby produce three of respective rotor position positive with three negative Hall voltages, after amplifying, control field effect transistor conducting, make threephase stator winding switch current in turn.
Position transducer is not only magneto-dependent sensor; Photosensitive position transducer or utilize inductance value size on the every phase winding of stator 9 can determine equally the position of rotor with salient pole iron core 10.
Described a kind of threephase switch reluctance motor and sinusoidal stator can be internal stator or external stator.
Described a kind of threephase switch reluctance motor and sinusoidal stator profile can be square or circular.
Described a kind of threephase switch reluctance motor and sinusoidal stator can be motor or generator.
Described a kind of threephase switch reluctance motor and sinusoidal stator can be linear electric motors.
A kind of threephase switch reluctance motor that described Linear motion actuator stator structure can be regarded a rotation as forms by radially cutting also generate plane open.
Based on so a kind of design, can imagine that three-phase and four equates that the basic ideas of heterogeneous switched reluctance machines and sinusoidal stator design are the same.
In described a kind of threephase switch reluctance motor and sinusoidal stator, tooth 4, tooth 5, tooth 4 three teeth form a utmost point, three tooth machinery polar arc faces are sinusoidal rule distribution shape, and polar arc face air gap is also sinusoidal rule distribution shape, and the magnetic potential of air gap waveform producing when coil electricity is also close to sinusoidal waveform.Increase tooth 5 tooth bodies, dwindle tooth 4 tooth body width, pole span is shortened, but an extremely total iron core magnetic is close constant, pole span shortens, and coil is just less, and stator coil end length shortens, and coil resistance is little, loss just reduces; Due to only three teeth of the number of teeth of composition one utmost point, from motor on the whole, the stator slot number of teeth is fewer, and teeth groove harmonic content is fewer, and loss will further reduce, and Cogging Torque will be less.
In described a kind of threephase switch reluctance motor and sinusoidal stator, tooth 5 is main tooth, and tooth 4 is that auxiliary tooth is also for phase and phase magnetic pole is total.Utilizing tooth 4 is features total between phase and phase magnetic pole, turn-offs the counter electromotive force current magnetic field suction rotor with salient pole iron core 10 that the source current in stator 9 windings produces and rotate in the time of commutation, has phase and phase pole field and merge the effect of handing-over.Be that master, left and right tooth 4 are that auxiliary three teeth rearrange a utmost point owing to adopting tooth 5, polar arc face air gap is sinusoidal rule distribution shape, makes the electromagnetism mmf wave producing in coil electricity closer to Sine distribution shape, produces the effect similar in appearance to circular rotating field.
Adopt the technical program advantage to be: 1. every mutually every utmost point is taking tooth 5 as main, left and right tooth 4 as auxiliary three teeth rearrange and polar arc face air gap is sinusoidal rule distribution shape, there is good sinusoidal wave mmf wave, utilizing tooth 4 is features total between phase and phase magnetic pole, in the time of commutation, turn-offing the counter electromotive force current magnetic field suction rotor with salient pole iron core 10 that the source current in stator 9 windings produces rotates, produce the effect similar in appearance to circular magnetic field, there is phase and phase magnetic field and merge the effect joining.Than the existing threephase switch reluctance motor of same specification, further reduce electromagnetism pulsation and noise, further reduce energy consumption simultaneously.2. coil rule is simple, can use coil inserting apparatus embed wholly, reduces manual operation intensity.
Brief description of the drawings
Fig. 1 is stator, the rotor deployed configuration schematic diagram of a kind of threephase switch reluctance motor and sinusoidal stator.
Figure 1A is a kind of threephase switch reluctance motor and sinusoidal stator four utmost point embodiment schematic diagrames.
Figure 1B is a kind of threephase switch reluctance motor and sinusoidal stator, rotor four utmost point embodiment schematic diagrames.
Fig. 2 is a kind of threephase switch reluctance motor and sinusoidal stator three-phase commutation main circuit.
Fig. 3 is the motor general assembly structural representation of a kind of threephase switch reluctance motor and sinusoidal stator.
In figure: the 1st, A phase winding, the 2nd, B phase winding, the 3rd, C phase winding, the 4th, tooth, the 5th, tooth, the 6th, A phase groove, the 7th, B phase groove, the 8th, C phase groove, the 9th, stator, the 10th, rotor with salient pole iron core, the 11st, A phase core magnetic pole, the 12nd, rotor-position permanent magnet poles, the 13rd, support, the 14th, air gap, the 22nd, B phase core magnetic pole, the 33rd, C phase core magnetic pole.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Please refer to Fig. 3, a kind of threephase switch reluctance motor and sinusoidal stator, comprise stator 9, rotor with salient pole iron core 10 etc.Wherein, be installed on by hall position sensor that a side of stator 9 iron core casings is other forms the signal sampling part in Three-phase electronic commutation circuit device with rotor-position permanent magnet poles 12.
Please refer to Figure 1A, a kind of threephase switch reluctance motor and sinusoidal stator four utmost point models, have 24 tooth 24 grooves, and material is high magnetic conduction silicon steel sheet or silicon steel sheet.
24 grooves are divided into eight A phase grooves 6, eight B phase grooves 7, eight C phase grooves 8 and groove area and equate, are embedded with respectively A phase winding 1, B phase winding 2, C phase winding 3 in groove.
24 teeth are divided into 5,12 teeth 4 of 12 teeth and arrange by circle-shaped alternate intervals, and the circular arc between tooth 5 tooth bodies and the tooth 4 tooth body axle neutral lines is apart from equating, tooth 5 tooth body width are the more than two times or two times of tooth 4 tooth body width.
In this example, taking tooth 5 tooth body width as 6mm, tooth 4 tooth body width design for 2.6mm.
Polar arc face air gap 14 between stator 9 winding iron core magnetic poles and rotor with salient pole iron core 10 is non-homogeneous air gap, is similar in appearance to the air gap changing by sinusoidal rule.Wherein, tooth 5 cambered surfaces are the mechanical configurations cambered surfaces that change by sinusoidal rule, tooth 5 cambered surface air gaps are sinusoidal gradual change air gap, intermediate air gap minimum, two ends air gap maximum, that is: gradually air gap is become to large in two ends taking tooth 5 tooth body axis to the left and right as line of demarcation along tooth 5 cambered surfaces, tooth 4 cambered surface air gaps are even air gap, slightly larger than tooth 5 cambered surface air gaps.
The embedding method of single coil is that pole span one is holding tooth 4 across four, tooth 5, tooth 4 three teeth are a utmost point, A phase winding 1 is embedded in 6 li of eight A phase grooves and is holding tooth 4, tooth 5, four A phase core magnetic poles 11 of tooth 4 three tooth compositions are embedded in 7 li of eight B phase grooves with adjacent B phase winding 2 and are holding tooth 4, tooth 5, four B phase core magnetic poles 22 of tooth 4 three tooth compositions are embedded in 8 li of eight C phase grooves with C phase winding 3 and are holding tooth 4, tooth 5, four C phase core magnetic poles 33 of tooth 4 three teeth composition, 120 ° of electrical degrees each other on locus, four A phase core magnetic poles 11, four B phase core magnetic poles 22, four C phase core magnetic pole 33 polar arc faces are main by tooth 5 respectively, left and right tooth 4 is that auxiliary three teeth rearrange and polar arc face air gap is sinusoidal rule distribution shape.
Described a kind of threephase switch reluctance motor and sinusoidal stator, also configure Three-phase electronic commutation circuit control device, different as required, can adopt closed loop, also can adopt controlling of open loop.
The described every phase winding of stator 9 connects into respectively tetra-magnetic poles of symmetrical N/S/N/S.
Described rotor is provided with four salient pole iron cores 10, on salient pole iron core 10, there is no winding, also there is no permanent magnet poles.
Please refer to Figure 1B, described rotor-position permanent magnet poles 12 is provided with tetra-magnetic poles of N/S/N/S, and with four coaxial same orientation of salient pole iron core 10, that is: 0 ° of electrical degree each other on locus, and polar arc degree equates.
The formation of described a kind of threephase switch reluctance motor can have different number of stator slots and rotor number of poles.
Following table has been listed the corresponding relation of several number of stator slots and rotor number of poles.
| Stator teeth groove number | 12 | 24 | 36 | 48 | 60 |
| Rotor number of poles | 2 | 4 | 6 | 8 | 10 |
Not only only have above-mentioned these corresponding relations, the ratio that can also be six times of rotor numbers of poles according to number of stator slots continues to extend the corresponding relation of stator and rotor.
Described stator 9 width of rebate are 2mm to 3mm.
Please refer to Figure 1B, described rotor with salient pole iron core 10 1 utmost point pole spans are (0.38～0.42) × π D/P.D is root diameter, and P is rotor number of poles.
Please refer to Fig. 2, described stator winding is three-phase delta connection, adopts Three-phase electronic commutation open loop or the control of closed loop circuit device.
Please refer to Fig. 3, on described stator 9 casings, by there being support 13, establish three Hall element H1, H2, H3 on support 13, radially corresponding with three-phase Hall element is rotor-position permanent magnet poles 12.
Be separated by 30 ° each other of mechanical angles of described Hall element H1, H2, H3 three's the axle neutral line, A phase core magnetic pole 11, B phase core magnetic pole 22, the C phase core magnetic pole 33 axle neutral line orientation of 30 ° are consistent each other with the mechanical angle of being separated by.
Described here refers to identical concept taking tooth 5 as main, left and right tooth 4 as auxiliary three teeth rearrange a utmost point and rearrange a utmost point with tooth 4, tooth 5, tooth 4 three teeth.
Described a kind of threephase switch reluctance motor and sinusoidal stator are widely used, and versatility is stronger, can be used for industrial automatic control field, as servomotor, and electric vehicle motor, various blower fans etc.
It should be noted that: the different motor of various numbers of poles has the Best Point of its work.
It should be noted that: this described embodiment is project optimization of the present invention, but invention is not limited in embodiment, any improvement, replacement or conversion under flesh and blood of the present invention all belongs to the scope of protection of the invention.
Claims (7)
1. a threephase switch reluctance motor and sinusoidal stator, comprise the three-phase stator core winding of 120 ° of electric angles each other, the electronics commutation devices such as rotor with salient pole iron core and position transducer thereof, it is characterized in that: described rotor is provided with some to salient pole iron core (10) and some to N/S utmost point rotor-position permanent magnet poles 12, described stator (9) has several teeth (5) to arrange by circle-shaped alternate intervals with tooth (4) and tooth (5) tooth body equates with the circular arc distance between tooth (4) the tooth body axle neutral line, some equal groove associations are between tooth (5) and tooth (4) and in impartial groove, be embedded with three phase windings, every phase winding connects into respectively the polar-symmetric magnetic pole of some N/S and on pole core, is provided with three-phase position transducer, every utmost point iron core in every phase winding is respectively by tooth (4), tooth (5), tooth (4) three teeth rearrange and polar arc face air gap is sinusoidal rule distribution shape, wherein, every phase winding number of magnetic poles or stator (9) groove number identical with rotor with salient pole iron core (10) number of poles is six times of rotor with salient pole iron core (10) number of poles, that is: the stator slot number of teeth and rotor number of poles have following corresponding relation,
2. a kind of threephase switch reluctance motor according to claim 1 and sinusoidal stator, it is characterized in that: three described phase windings are that A phase winding (1) is embedded in the inner tooth (4) that holding of A phase groove (6), tooth (5), tooth (4) three tooth composition A phase core magnetic poles (11) are embedded in the inner tooth (4) that holding of B phase groove (7) with adjacent B phase winding (2), tooth (5), tooth (4) three tooth composition B phase core magnetic poles (22) are embedded in the inner tooth (4) that holding of C phase groove (8) with adjacent C phase winding (3), tooth (5), tooth (4) three teeth compositions C phase core magnetic poles (33) 120 ° of electrical degrees each other on locus.
3. a kind of threephase switch reluctance motor according to claim 1 and 2 and sinusoidal stator, it is characterized in that: described tooth 5 cambered surfaces are the mechanical configurations cambered surfaces that change by sinusoidal rule, tooth (5) cambered surface air gap is the sinusoidal gradual change air gap that the little two ends of intermediate air gap air gap is large, and tooth (4) cambered surface air gap is even air gap and is a bit larger tham tooth (5) cambered surface two ends air gap.
4. according to a kind of threephase switch reluctance motor and sinusoidal stator described in claim 1 or 2 or 3, it is characterized in that: described tooth (5) tooth body width is the more than two times or two times of tooth (4) tooth body width.
5. a kind of threephase switch reluctance motor according to claim 1 and sinusoidal stator, is characterized in that: described rotor with salient pole iron core (10) one utmost point pole spans are (0.38～0.42) × π D/P.
6. a kind of threephase switch reluctance motor according to claim 1 and sinusoidal stator, it is characterized in that: described rotor with salient pole iron core (10) number of pole-pairs is identical and coaxial with rotor-position permanent magnet poles (12) number of pole-pairs spatially 0 ° of electrical degree each other of its both position of magnetic poles.
7. according to a kind of threephase switch reluctance motor and sinusoidal stator described in claim 1 or 7, it is characterized in that: described three-phase position transducer is hall position sensor H1, H2, H3,120 ° of electrical degrees each other on locus, its hall position sensor H1, H2, the H3 axle neutral line and locus each other the axle neutral line orientation of A phase core magnetic pole (11), B phase core magnetic pole (22), the C phase core magnetic pole (33) of 120 ° of electrical degrees are consistent.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410326346.0A CN104079136A (en) | 2014-07-08 | 2014-07-08 | Three-phase switch reluctance machine and sine stator |
| CN201410719607.5A CN104410177B (en) | 2014-07-08 | 2014-12-02 | A kind of stator and its corresponding brshless DC motor and three-phase switch reluctance machine |
| CN201420744756.2U CN204258453U (en) | 2014-07-08 | 2014-12-02 | A kind of stator and accordingly brshless DC motor and three-phase switch reluctance machine |
| PCT/CN2015/082402 WO2016004823A1 (en) | 2014-07-08 | 2015-06-25 | Stator, brushless direct current motor, three-phase switch reluctance motor and shaded pole motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410326346.0A CN104079136A (en) | 2014-07-08 | 2014-07-08 | Three-phase switch reluctance machine and sine stator |
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| Publication Number | Publication Date |
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| CN104079136A true CN104079136A (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410326346.0A Pending CN104079136A (en) | 2014-07-08 | 2014-07-08 | Three-phase switch reluctance machine and sine stator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016004823A1 (en) * | 2014-07-08 | 2016-01-14 | 顾明 | Stator, brushless direct current motor, three-phase switch reluctance motor and shaded pole motor |
| CN108462415A (en) * | 2018-02-09 | 2018-08-28 | 苏州仙崴机电有限公司 | A kind of switched reluctance machines position information detection method based on single location sensor |
| CN110594175A (en) * | 2019-10-25 | 2019-12-20 | 深圳市高斯轨道交通有限公司 | Shaftless fan |
| CN112713668A (en) * | 2020-12-22 | 2021-04-27 | 郑州轻工业大学 | Three-phase double-salient-pole motor with unevenly distributed stator pole widths |
-
2014
- 2014-07-08 CN CN201410326346.0A patent/CN104079136A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016004823A1 (en) * | 2014-07-08 | 2016-01-14 | 顾明 | Stator, brushless direct current motor, three-phase switch reluctance motor and shaded pole motor |
| CN108462415A (en) * | 2018-02-09 | 2018-08-28 | 苏州仙崴机电有限公司 | A kind of switched reluctance machines position information detection method based on single location sensor |
| CN110594175A (en) * | 2019-10-25 | 2019-12-20 | 深圳市高斯轨道交通有限公司 | Shaftless fan |
| CN112713668A (en) * | 2020-12-22 | 2021-04-27 | 郑州轻工业大学 | Three-phase double-salient-pole motor with unevenly distributed stator pole widths |
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Application publication date: 20141001 |