CN101640465A - Flywheel motor adopting no-cross one-range winding - Google Patents
Flywheel motor adopting no-cross one-range winding Download PDFInfo
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- CN101640465A CN101640465A CN200910072788A CN200910072788A CN101640465A CN 101640465 A CN101640465 A CN 101640465A CN 200910072788 A CN200910072788 A CN 200910072788A CN 200910072788 A CN200910072788 A CN 200910072788A CN 101640465 A CN101640465 A CN 101640465A
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Abstract
The invention discloses a flywheel motor adopting a no-cross one-range winding, relating to the technical field of the motor and solving the problems that the existing flywheel motor has complex structure, large power consumption and poor moment stability. A rotor in the invention is a wheel body of a flywheel; an outer rotor iron core and an inner rotor iron core of the rotor are fixedly connected on a torque output shaft; a no-iron core frame type stator is fixed between the inner rotor iron core and the outer rotor iron core; permanent magnets are fixed on the inner rotor iron core or the outer rotor iron core and the side wall corresponding to the no-iron core frame type stator; a winding of the no-iron core frame type stator consists of a plurality of groups of planar coils which areevenly distributed and fixed on the side wall of the frame; two adjacent groups of planar coils have an electric angle of 240 degrees, and have no cross; three position sensors are respectively fixedon the frames at the central positions of three adjacent groups of planar coils; and the ratio of the number Z of the planar coils and the number 2p of poles of the permanent magnets is 3/4. The flywheel motor is applicable to the technical fields of posture control of the satellites and control moment gyros and the like.
Description
Technical field
The present invention relates to technical field of motors.Be particularly related to a kind of brshless DC motor that adopts the no-cross one-range winding.Be applicable to attitude of satellite control.
Background technology
At present, attitude of satellite control is made of independent wheel body and brshless DC motor mostly with flywheel, fixes by mechanical structures such as flanges between the two.There is complex structure, is difficult to realize the problem such as miniaturization, lightweight of flywheel.
The winding construction slightly complicated of the brshless DC motor of traditional structure is unfavorable for realizing coreless armature.
The position transducer of conventional motors usually needs extra installing mechanism and space, and general what detect is stray field, and position detection accuracy and reliability are all relatively poor, and the position of the relative motor windings of position transducer need be adjusted when assembling usually.The problems referred to above make traditional fly-wheel motor complex structure, and power consumption is big, and the moment stationarity is poor.
Summary of the invention
In order to solve the problem of the big and moment stationarity difference of existing fly-wheel motor complex structure, power consumption, the invention provides a kind of fly-wheel motor that adopts the no-cross one-range winding.
The fly-wheel motor of employing no-cross one-range winding of the present invention is by rotor, there is not skeleton-type stator unshakable in one's determination, permanent magnet and three position transducers are formed, described rotor is made up of external rotor iron core and internal rotor iron core, internal rotor iron core and external rotor iron core are fixedly connected on the torque output shaft, not having skeleton-type stator unshakable in one's determination is fixed between described internal rotor iron core and the external rotor iron core, and and all leave air gap between described internal rotor iron core and the external rotor iron core, permanent magnet is fixed on the sidewall relative with no skeleton-type stator unshakable in one's determination on internal rotor iron core or the external rotor iron core, described no skeleton-type stator unshakable in one's determination is by winding, skeleton and stator seat are formed, described skeletal fixation is on stator seat, winding is three phase windings, described winding is made up of many groups planar coil, described many group planar coils evenly distribute and are fixed on the sidewall of skeleton, the two adjacent groups planar coil differs 240 degree electrical degrees, and do not have between the two adjacent groups planar coil and intersect, three position transducers are separately fixed on the skeleton of center of three groups of adjacent planar coils, and the number Z of described planar coil is 3/4 with the ratio of the number of poles 2p of permanent magnet.
Fly-wheel motor employing magneto of the present invention and wheel body, the integrated design of transducer are made up of stator, rotor, position transducer.Stator and rotor are the major parts of motor, are the mechanisms that produces moment.Position transducer detection rotor position is converted to the signal of telecommunication with the position signalling of rotor, according to this signal of telecommunication, in corresponding winding, pass to electric current, make the magnetic field of described winding generation and the main field interaction that permanent magnet produces, produce electromagnetic torque, make rotor rotate reposefully.
Fly-wheel motor adopts the radial magnetic structure.Stator adopts no core construction, and as skeleton, winding is fixed on the skeleton with non-magnetic conduction insulating material.Rotor is the wheel body of flywheel, and rotor core is the part of motor magnetic circuit, simultaneously again as the wheel body of flywheel, generally thickeies the external rotor iron core.Adopt permanent magnet to produce main field.Position transducer adopts Hall integrated circuit, directly is fixed in the armature skeleton, and is in the air-gap field.
Characteristics of the present invention:
Stator winding is the no-cross one-range winding, a plurality of coils constitute three phase windings, and a plurality of coils that belong to same phase are connected in series and form a phase winding, and each coil is the monoplane structure, and spatially do not have intersection between the adjacent windings, have advantage simple in structure, that manufacturability is strong.
Tooth portion on the stator skeleton has enough spaces, be convenient to direct riding position transducer, make position transducer directly detect air-gap field, the magnetic flux density in magnetic field, position transducer position is higher, thereby guarantees the sensitivity and the reliability of the position signalling of position transducer output.The center of the mounting groove of position transducer is positioned on the center line of tooth at circumferencial direction, is convenient to guarantee the machining accuracy of angle, makes that the precision of position detection signal is higher.The outgoing position signal that is positioned at the position transducer of laying on the tooth center line follows the emf phase of a phase winding of adjacent teeth correspondence to differ 30 degree electrical degrees just on phase place, satisfies the commutation requirement of brshless DC motor.Position transducer need not extra fixed mechanism, adjustment that need not be extra during assembling.Winding, skeleton and position transducer form integrated armature, have compact conformation, characteristics that volume is little.
Stator adopts no core construction, and as support frame, winding is fixed on the skeleton with non-magnetic conduction insulating material, guarantee the rigidity and the intensity of armature, simultaneously there are not iron loss and location torque, make the armature manufacturing process simple yet, make fly-wheel motor have the advantages that loss is little, operate steadily.
The rotor of motor is the wheel body of flywheel, and rotor core is the part of motor magnetic circuit, simultaneously again as the wheel body of flywheel, generally thickeies the external rotor iron core, makes full use of material and space, significantly improves the moment of inertia of flywheel.
Adopt permanent magnet to produce main field, can improve motor and exert oneself, reduce the volume and weight of motor.
Fly-wheel motor of the present invention can be applied to attitude of satellite control flywheel and control-moment gyro, when being applied to attitude of satellite control, may operate in electronic/generating state, realizes four quadrant running.
Description of drawings
Fig. 1 is the structural representation of embodiment one described fly-wheel motor, and wherein 5 is winding leads.Fig. 2 is the structural representation of the skeleton 32 of the nothing skeleton-type stator 3 unshakable in one's determination among Fig. 1.Fig. 3 is the annexation schematic diagram of the winding of being made up of 6 groups of planar coils 331 33 of embodiment one described fly-wheel motor.Fig. 4 is that embodiment two described internal rotors unshakable in one's determination 3 and external rotor unshakable in one's determination 1 are the syndeton schematic diagram when dividing body structure.Fig. 5 is the A-A profile of Fig. 4.Fig. 6 is the rotor structure schematic diagram of permanent magnet 4 when being fixed on the unshakable in one's determination lateral wall of internal rotor.Fig. 7 is the rotor structure schematic diagram of embodiment five described fly-wheel motors.Fig. 8 is the B-B profile of Fig. 7.Fig. 9 is the rotor structure schematic diagram of embodiment seven described fly-wheel motors.Figure 10 is the structural representation of the stator seat 31 of no skeleton-type stator unshakable in one's determination 3.
Embodiment
Embodiment one: present embodiment is described referring to Fig. 1.The fly-wheel motor of the described employing no-cross one-range of present embodiment winding is by rotor, there is not skeleton-type stator 3 unshakable in one's determination, permanent magnet 4 and three position transducers are formed, described rotor is made up of external rotor unshakable in one's determination 1 and internal rotor unshakable in one's determination 2, internal rotor unshakable in one's determination 2 and external rotor iron core 1 are fixedly connected on the torque output shaft, not having skeleton-type stator 3 unshakable in one's determination is fixed between described internal rotor unshakable in one's determination 2 and the external rotor iron core 1, and and all leave air gap between described internal rotor unshakable in one's determination 2 and the external rotor iron core 1, permanent magnet 4 is fixed on internal rotor unshakable in one's determination 2 or the external rotor iron core 1 on the sidewall relative with no skeleton-type stator unshakable in one's determination 3, described no skeleton-type stator 3 unshakable in one's determination is by winding 33, skeleton 32 and stator seat 31 are formed, described skeleton 32 is fixed on the stator seat 31, winding 33 is three phase windings, described winding 33 is made up of many groups planar coil 331, described many group planar coils 331 evenly distribute and are fixed on the sidewall of skeleton 32, two adjacent groups planar coil 331 differs 240 degree electrical degrees, and do not have between the two adjacent groups planar coil 331 and intersect, three position transducers are separately fixed on the skeleton 32 of center of three groups of adjacent planar coils 331, and the number Z of described planar coil 331 is 3/4 with the ratio of the number of poles 2p of permanent magnet 4.
The described fly-wheel motor of present embodiment is when work, and the path of magnetic circuit is: by external rotor iron core 1, permanent magnet 4, air gap, nothing skeleton-type stator 3 unshakable in one's determination and internal rotor iron core 2.
The described fly-wheel motor of present embodiment, it is the part of motor magnetic circuit that external rotor unshakable in one's determination 1 and internal rotor iron core 2 are fixed together, and simultaneously again as the wheel body of flywheel, makes the wheel body of flywheel and the rotor of motor form integral structure.
The thickness of the described internal rotor iron core 2 of present embodiment is smaller, is generally 2mm to 4mm; Its effect is a part of magnetic circuit that is used for constituting main flux.
The described external rotor of present embodiment unshakable in one's determination 1 is thicker, is generally 3mm to 10mm; Except the effect of a part of magnetic circuit of realize constituting main flux, also use, and then realized improving the purpose that unit mass produces maximum moment of inertia as wheel body.
Internal rotor described in the present embodiment unshakable in one's determination 2 and external rotor iron core 1 can adopt the branch body structure, also can adopt integrative-structure.
Internal rotor in the present embodiment unshakable in one's determination 2 and external rotor iron core 1 can adopt electrical pure iron, carbon constructional quality steel, high magnetic stainless steel material to make.
Three position transducers in this enforcement side lay respectively at the center of three groups of adjacent plane windings, make the position signalling of a position transducer output follow the emf phase of a phase winding that is adjacent on phase place, to differ 30 degree electrical degrees just, satisfy the commutation requirement of brshless DC motor.In addition, the position transducer in the present embodiment is positioned at the center of one group of coil, can guarantee that described position transducer is positioned at main field, and then improve the sensitivity of position transducer, reaches the purpose that reflects rotor position information exactly.Be specially: the position signalling that first position transducer in described three position transducers collects and second coil electromotive force interval 30 degree electrical degree that position transducer is corresponding; Second position signalling and the 3rd the coil electromotive force interval 30 degree electrical degrees that position transducer is corresponding that position transducer collects; The coil electromotive force interval 30 degree electrical degrees that the position signalling of the 3rd position transducer is corresponding with first position transducer.The commutation signal of hysteresis 30 degree electrical degrees is provided just can for respectively each phase winding by the positional information of above-mentioned three position transducer collections.
The described position transducer of present embodiment can be selected locking-typed Hall integrated circuit for use.
The described no skeleton-type stator unshakable in one's determination of present embodiment 3 is made of non-magnet material, on Principle of Electric Engine, can equivalence regard the part of air gap as.Skeleton 32 can adopt material such as wind gathering plastic cement, epoxy glass fabric rod, processable ceramic or carbon fiber in the present embodiment.
Stator seat 31 in the described no skeleton-type stator 3 unshakable in one's determination of present embodiment can adopt non-magnet material to make, and for example can adopt alloy aluminum.When actual fabrication, can on stator seat 31, process groove structure, be convenient to fixedlying connected of skeleton 32 and stator seat 31, can also adopt epoxide-resin glue cast fixed connection place again, the degree that is connected firmly of web frame and stator seat.
Skeleton 32 on nothing in the present embodiment skeleton-type stator 3 unshakable in one's determination, stator seat 31, winding 33 and three position transducers and winding leads 5 can adopt epoxide-resin glue to pour into a mould, and make it form an integral body.
The pole embrace of the permanent magnet 4 in the present embodiment can equal 1, also can reduce the consumption of permanent magnet like this less than 1.When the pole embrace of permanent magnet less than 1 the time, permanent magnet 4 zone lines can adopt non-magnet material to fill, as adopting material such as alloy aluminum.
The number Z of the planar coil 331 in the described fly-wheel motor of present embodiment is equivalent to the groove number of the motor stator in the machine field, and the number Z of planar coil 331 is respectively with the ratio of permanent magnet number of poles 2p:
When k=1, the winding of the described fly-wheel motor of present embodiment is made up of 3 coils.The head end called after A1 of the 1st coil, its tail end called after X1, the head end called after C1 of the 2nd coil, its tail end called after Z1, the head end called after B1 of the 3rd coil, its tail end called after Y1.Above-mentioned 3 coils are formed a unit motor windings, spatially account for 720 degree electrical degrees.First coil is the A phase winding of motor, and the 3rd coil is the B phase winding of motor, and the 2nd coil is the C phase winding of motor.
When K=2, the winding of the described fly-wheel motor of present embodiment is made up of 6 coils.The rule of wherein preceding 3 coils is identical with above-mentioned situation, the head end called after A2 of the 4th coil, its tail end called after X2, the head end called after C2 of the 5th coil, its tail end called after Z2, the head end called after B2 of the 6th coil, its tail end called after Y2,1st, the winding of a unit motor of 2 and 3 coil compositions, the 4th, 5 and 6 coil formed the winding of another unit motor, and each unit motor windings spatially accounts for 720 degree electrical degrees.The X1 of the 1st line links to each other with the A2 of the 4th coil, draws the head end of A1 as the A phase winding of motor, draws the tail end of X2 as the A phase winding.The Y1 of the 3rd line links to each other with the B2 of the 6th coil, draws the head end of B1 as the B phase winding of motor, draws the tail end of Y2 as the B phase winding.The Z1 of the 2nd line links to each other with the C2 of the 5th coil, draws the head end of C1 as the C phase winding of motor, draws the tail end of Z2 as the C phase winding.
During K=3, motor is made up of 9 coils, and its rule is similar.
Coil described in the present embodiment is distributed full-pitched coil.
Embodiment two: the difference of the fly-wheel motor of present embodiment and embodiment one described employing no-cross one-range winding is, described internal rotor unshakable in one's determination 2 and external rotor unshakable in one's determination 1 are for dividing body structure, described internal rotor unshakable in one's determination 2 is connected by crossbeam 21 with an end of external rotor iron core 1, and the employing screw is fixed.
Internal rotor of present embodiment unshakable in one's determination 2 and external rotor unshakable in one's determination 1 adopt and divide body structure, make that the mounting means of permanent magnet 4 is more flexible, are convenient to produce.
Embodiment three: the difference of the fly-wheel motor of present embodiment and embodiment one or two described employing no-cross one-range windings is that described permanent magnet 4 is fixed on the lateral wall of internal rotor iron core 2.
Embodiment four: the difference of the fly-wheel motor of present embodiment and embodiment one or two described employing no-cross one-range windings is that described permanent magnet 4 is fixed on the madial wall of external rotor iron core 1.
Embodiment five: present embodiment is described referring to Fig. 7 and Fig. 8.The difference of the fly-wheel motor of present embodiment and embodiment one or two described employing no-cross one-range windings is, be fixed with permanent magnet 4 respectively on the lateral wall of internal rotor iron core 2 and on the madial wall of external rotor iron core 1, the polarity that is fixed on two permanent magnets 4 on external rotor unshakable in one's determination 1 and internal rotor 2 correspondence positions unshakable in one's determination is opposite.
All be fixed with permanent magnet 4 on internal rotor of the described fly-wheel motor of present embodiment unshakable in one's determination 2 and the external rotor iron core 1, increased the intensity of air-gap field.
Embodiment six: the difference of the fly-wheel motor of present embodiment and embodiment one or two described employing no-cross one-range windings is, the external rotor unshakable in one's determination 1 of permanent magnet 4 or the sidewall end of internal rotor iron core 2 are installed exceed permanent magnet d1 length, described d1 is between 1mm to 2mm.
The lower end of the iron core that permanent magnet is installed of present embodiment exceeds permanent magnet one distance, d 1, can reduce permanent magnet effectively and produce too much leakage field in bottom unshakable in one's determination.
Embodiment seven: the difference of the fly-wheel motor of present embodiment and embodiment one or two described employing no-cross one-range windings is, it also comprises magnetic guiding loop 7, described magnetic guiding loop 7 is fixed on the bottom of the sidewall of external rotor that is fixed with permanent magnet 4 unshakable in one's determination 1 or internal rotor iron core 2, and the upper surface of described magnetic guiding loop 7 contacts with the lower surface of permanent magnet 4.
Present embodiment has been fixed magnetic guiding loop 7 in the lower end of permanent magnet 4, can reduce the permanent magnet brow leakage effectively.
The thickness d 2 of the described magnetic guiding loop 7 of present embodiment is between 1mm to 2mm.
The described magnetic guiding loop 7 of present embodiment can adopt and external rotor unshakable in one's determination 1 or internal rotor 2 identical materials unshakable in one's determination.
Embodiment eight: the difference of the fly-wheel motor of present embodiment and the described employing no-cross one-range of embodiment one to seven arbitrary execution mode winding is, described permanent magnet 4 is permanent magnets or is assemblied to form by polylith same polarity permanent magnets.
When described permanent magnet 4 is when adopting polylith same polarity permanent magnets to be assemblied to form, generally can adopt 2,3 or 4 permanent magnets assembly units.The permanent magnet 4 that this employing polylith permanent magnets is assemblied to form can improve field waveform, the flat-top zone of broadening air-gap field, and then reach the effect that the stationarity of output torque was exerted oneself, improved to the increase motor.
Embodiment nine: the difference of the fly-wheel motor of present embodiment and the described employing no-cross one-range of embodiment one to eight arbitrary execution mode winding is, on the lateral wall of the skeleton 32 in the described no skeleton-type stator 3 unshakable in one's determination is groove structure, described planar coil 331 embeds in the groove structure, every group of planar coil 331 embedded middle projectioies of groove are tooth 321, center at three adjacent teeth 321 has mounting groove 322, position transducer of each mounting groove 322 internal fixation.
The described skeleton 32 of present embodiment can adopt the following course of processing to obtain: mill out groove structure 323 after skeleton machine-shaping again, described groove structure is used to lay coil, projection in the middle of the described groove structure is a tooth 321, on skeleton, choose 3 adjacent teeth then, and on each tooth, mill out 1 mounting groove 322, be used for the installation site transducer.
Embodiment ten: the difference of the fly-wheel motor of present embodiment and the described employing no-cross one-range of embodiment one to nine arbitrary execution mode winding is, can also leave the upper end of ejecting skeleton 32 when a circle projection 324, described protruding 324 is used to prevent planar coil 331 distortion on the top of described skeleton 32 lateral walls.
Claims (10)
1, adopt the fly-wheel motor of no-cross one-range winding, it is characterized in that it comprises rotor, there is not skeleton-type stator unshakable in one's determination (3), permanent magnet (4) and three position transducers, described rotor is made up of external rotor iron core (1) and internal rotor iron core (2), internal rotor iron core (2) and external rotor iron core (1) are fixedly connected on the torque output shaft, not having skeleton-type stator unshakable in one's determination (3) is fixed between described internal rotor iron core (2) and the external rotor iron core (1), and and all leave air gap between described internal rotor iron core (2) and the external rotor iron core (1), permanent magnet (4) is fixed on internal rotor iron core (2) or external rotor iron core (1) is gone up on the sidewall relative with no skeleton-type stator unshakable in one's determination (3), described no skeleton-type stator unshakable in one's determination (3) is by winding (33), skeleton (32) and stator seat (31) are formed, described skeleton (32) is fixed on the stator seat (31), winding (33) is three phase windings, described winding (33) is made up of many groups planar coil (331), described many group planar coils (331) evenly distribute and are fixed on the sidewall of skeleton (32), two adjacent groups planar coil (331) differs 240 degree electrical degrees, and do not have between the two adjacent groups planar coil (331) and intersect, three position transducers are separately fixed on the skeleton (32) of center of adjacent three groups of planar coils (331), and the ratio of the number of poles 2p of the number Z of described planar coil (331) and permanent magnet (4) is 3/4.
2, the fly-wheel motor of employing no-cross one-range winding according to claim 1 is characterized in that described internal rotor iron core (2) and external rotor iron core (1) adopt to divide body structure or be structure as a whole.
3, the fly-wheel motor of employing no-cross one-range winding according to claim 1, the pole embrace that it is characterized in that described permanent magnet (4) are less than 1, and permanent magnet (4) zone line adopts non-magnet material to fill.
According to the fly-wheel motor of claim 1,2 or 3 described employing no-cross one-range windings, it is characterized in that 4, described permanent magnet (4) is fixed on the lateral wall of internal rotor iron core (2) or is fixed on the madial wall of external rotor iron core (1).
5, according to the fly-wheel motor of claim 1,2 or 3 described employing no-cross one-range windings, it is characterized in that, be fixed with permanent magnet (4) respectively on the lateral wall of internal rotor iron core (2) and on the madial wall of external rotor iron core (1), the polarity that is fixed on two permanent magnets (4) on external rotor iron core (1) and internal rotor iron core (2) correspondence position is opposite.
6, according to the fly-wheel motor of claim 1,2 or 3 described employing no-cross one-range windings, it is characterized in that, the external rotor iron core (1) of permanent magnet (4) or the sidewall end of internal rotor iron core (2) are installed exceed permanent magnet d1 length, described d1 is between 1mm to 2mm.
7, according to the fly-wheel motor of claim 1,2 or 3 described employing no-cross one-range windings, it is characterized in that, it also comprises magnetic guiding loop (7), described magnetic guiding loop (7) is fixed on the bottom of the sidewall of the external rotor iron core (1) that is fixed with permanent magnet (4) or internal rotor iron core (2), and the upper surface of described magnetic guiding loop (7) contacts with the lower surface of permanent magnet (4).
According to the fly-wheel motor of claim 1,2 or 3 described employing no-cross one-range windings, it is characterized in that 8, described permanent magnet (4) is a permanent magnets or is assemblied to form by polylith same polarity permanent magnets.
9, according to the fly-wheel motor of claim 1,2 or 3 described employing no-cross one-range windings, it is characterized in that, be groove structure (323) on the lateral wall of the skeleton (32) in the described no skeleton-type stator unshakable in one's determination (3), described planar coil (331) embeds in the groove structure (323), the embedded middle projection of groove of every group of planar coil (331) is tooth (321), center at adjacent three teeth (321) has mounting groove (322), position transducer of each mounting groove (322) internal fixation.
10, according to the fly-wheel motor of claim 1,2 or 3 described employing no-cross one-range windings, it is characterized in that, can also leave a circle projection (324) on the top of described skeleton (32) lateral wall.
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| CN200910072788A CN101640465A (en) | 2009-09-03 | 2009-09-03 | Flywheel motor adopting no-cross one-range winding |
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| CN200910072788A CN101640465A (en) | 2009-09-03 | 2009-09-03 | Flywheel motor adopting no-cross one-range winding |
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| CN105703507A (en) * | 2016-03-22 | 2016-06-22 | 迪百仕电机科技（苏州）有限公司 | Rotor of permanent magnet outer rotor motor |
| CN106329855B (en) * | 2016-10-18 | 2018-12-25 | 上海航天控制技术研究所 | A kind of assembly tooling and its assembly method of the double magnetic steel rotors of high-torque flywheel |
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| CN108574358A (en) * | 2018-05-04 | 2018-09-25 | 深圳市正德智控股份有限公司 | A kind of coil of motor, coil block and motor |
| CN108847735A (en) * | 2018-06-21 | 2018-11-20 | 东南大学 | A kind of flywheel high-speed motor using PCB spiral shape winding |
| CN108964319A (en) * | 2018-06-21 | 2018-12-07 | 东南大学 | A kind of flywheel high-speed motor using PCB waveform winding |
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| CN113131705A (en) * | 2021-04-27 | 2021-07-16 | 山东大学 | Cup-shaped winding permanent magnet synchronous motor, energy storage flywheel and method |
| CN113131705B (en) * | 2021-04-27 | 2023-04-07 | 山东大学 | Cup-shaped winding permanent magnet synchronous motor, energy storage flywheel and method |
| CN113765320A (en) * | 2021-08-16 | 2021-12-07 | 江苏大学 | Low-torque ripple permanent magnet brushless direct current motor for flywheel energy storage |
| CN113765320B (en) * | 2021-08-16 | 2022-10-28 | 江苏大学 | Low-torque ripple permanent magnet brushless direct current motor for flywheel energy storage |
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