CN107086756A - Low-thrust fluctuates independent winding permanent-magnetism linear motor - Google Patents

Low-thrust fluctuates independent winding permanent-magnetism linear motor Download PDF

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Publication number
CN107086756A
CN107086756A CN201710340964.4A CN201710340964A CN107086756A CN 107086756 A CN107086756 A CN 107086756A CN 201710340964 A CN201710340964 A CN 201710340964A CN 107086756 A CN107086756 A CN 107086756A
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CN
China
Prior art keywords
primary
magnetism
motor
permanent
low
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CN201710340964.4A
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Inventor
黄旭珍
钱振宇
李静
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Priority to CN201710340964.4A priority Critical patent/CN107086756A/en
Publication of CN107086756A publication Critical patent/CN107086756A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K41/00Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02Linear motors; Sectional motors
    • H02K41/03Synchronous motors; Motors moving step by step; Reluctance motors
    • H02K41/031Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03Machines characterised by numerical values, ranges, mathematical expressions or similar information

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Linear Motors (AREA)

Abstract

The present invention provides a kind of low-thrust fluctuation independent winding permanent-magnetism linear motor, belongs to technical field of motors.It includes primary component, secondary component and air gap.Primary component includes armature winding, primary unshakable in one's determination and permanent magnet.Primary internal open unshakable in one's determination sets armature winding in vat, groove, primary unshakable in one's determination opened towards air gap yoke portion installs permanent magnet or magnetic conductive iron in sulculus, sulculus.For three phase electric machine, the primary addendum width unshakable in one's determination of adjacent phase is that (k ± 2/3) τ, K is odd number.Secondary component is the secondary iron core of magnetic conduction and gap composition.Air gap is formed between primary component and secondary component.Multiple primary vats and its corresponding secondary, gap structure, form a unit motor.Set the phase in the magnetism-regulating structure that width is τ, adjacent cells motor with phase winding need to be oppositely arranged between unit motor.Set by magnetism-regulating structure, the even harmonics in the motor phase windings are cancelled out each other, and force oscillation is greatly lowered.

Description

Low-thrust fluctuates independent winding permanent-magnetism linear motor
Technical field
The invention belongs to machine field, a kind of low-thrust fluctuation independent winding permanent-magnetism linear motor is related specifically to.
Background technology
Direct-drive technology based on linear electric motors, eliminates middle complicated transmission mechanism, in lathe, elevator isoline Applications are moved, and its application field is just gradually being expanded to each field of production and life.But and dynamo-electric machine system Difference, most of commercial Application cathetus electric system can not improve power density using design at high speed and reduce volume matter Amount, therefore, will reduce the volume mass of linear electric motors, can only place hope on the pushing force density for improving motor.Improve pushing away for motor Force density, can from improve electric load, magnetic loading and changes of magnetic field frequency it is several from the aspect of, existing permanent synchronous linear electricity , there are several features in machine:Winding technique complex process, winding radiating is difficult, limits the raising of electric load;No matter by primary or Secondary trigger switch, mover quality is larger so that in the case of the certain thrust output of motor, the acceleration and dynamic property of motor It is restricted;Permanent magnet consumption is big so that the cost increase of permanent-magnetism linear motor.In addition, linear electric motors are usually used in high accuracy directly Line motion control occasion, linear electric motors end effect, slot effect and back-emf harmonic content are big, cause the force oscillation of motor Generally than larger, so as to influence the control performance of motor.
The content of the invention
Existing permanent magnetic linear synchronous motor pushing force density is low, permanent magnet consumption is big and force oscillation is asked greatly to solve by the present invention Topic, proposes low-thrust fluctuation independent winding permanent-magnetism linear motor.
The concrete technical scheme of the present invention is as follows:
Low-thrust fluctuates independent winding permanent-magnetism linear motor, and it includes primary component, secondary component and air gap, can use Plate or cylindrical structure.Primary component includes armature winding 1, primary iron core 2 and permanent magnet 3.Open big inside primary iron core 2 It is canine tooth 2-3 between groove 7, adjacent vat, the number of vat 7 is to set armature winding 1, primary iron in number of phases M integral multiple, groove The heart 2 opens n sulculus 8 in the primary towards air gap 4 is unshakable in one's determination on yoke 2-3 (n is integer, n >=1), forms sulculus 8 and primary iron core Permanent magnet 4 is installed in small tooth 2-4 separately structures, sulculus 8.For three phase electric machine, the primary tooth top 2-3 width unshakable in one's determination of adjacent phase is (k ± 2/3) τ, K is odd number.Secondary component is that the secondary iron core 5 of magnetic conduction and secondary gap 6 are constituted.Between neighboring secondary iron core 5 Distance be 2 τ, i.e., according to the cycle be 2 τ formed array.Air gap 4 is formed between primary component and secondary component.M primary vat 7 and its corresponding secondary, gap structure, form a unit motor.Between being set on primary iron core 2, between adjacent cells motor Away from the magnetism-regulating structure 9 for (2N+1) τ (N=0,1,2 ...), play a part of adjusting different units motor-field harmonic wave, adjacent list Phase in first motor with phase winding 1-1 and 1-2 needs oppositely arranged.
The further design of the present invention is:
On low-thrust fluctuation independent winding permanent-magnetism linear motor, the width of sulculus 8 and permanent magnet 3 is (τ+a), small tooth 2-4 Width be (τ-a), a span is:-τ/2≤a≤τ/2.
For dual-side flat plate type structural electromotor, the magnetizing direction of the permanent magnet 3 in each primary is identical, but at the beginning of two Permanent magnet 3-1 and 3-2 magnetizing direction are opposite each other in level, perpendicular to air gap, but refer in the opposite direction.
On low-thrust fluctuation independent winding permanent-magnetism linear motor, the number of sulculus 8 and the block number of permanent magnet 3 are odd number, small Tooth 2-4 number is then even number.
On low-thrust fluctuation independent winding permanent-magnetism linear motor, the number of sulculus 8 and the block number of permanent magnet 3 are even number, small Tooth 2-4 number is then odd number.
The magnetism-regulating structure 9 of low-thrust fluctuation independent winding permanent-magnetism linear motor can use magnetic conduction magnetism-regulating structure 9-1, magnetic conduction Magnetism-regulating structure 9-1 width is (2N+1) τ (N=0,1,2 ...).
The magnetism-regulating structure 9 of low-thrust fluctuation independent winding permanent-magnetism linear motor can be non-using air, non-magnetic alloy etc. Magnetic conduction magnetism-regulating structure 9-2, non-magnetic magnetism-regulating structure 9-2 width are (2N+1) τ, and the unit motor on magnetism-regulating structure both sides turns into magnetic Completely self-contained two motors on road.
The solid magnetism-regulating structure 9 of low-thrust fluctuation independent winding permanent-magnetism linear motor can be using fluting 9-3 structures, to subtract Light motor quality.
The present invention can use unilateral flat structure scheme, and independent winding permanent magnetism is fluctuated for unilateral plate low-thrust Linear electric motors, the magnetizing direction all same of all permanent magnets 3 in primary, is perpendicular to air gap direction.
The present invention can use cylinder type, and independent winding permanent-magnetism linear motor, position are fluctuated for cylinder type low-thrust It is identical in the magnetizing direction of the permanent magnet 3 in primary, it is, perpendicular to air gap, to point to radial direction.
It is an advantage of the invention that:
1st, low-thrust of the invention fluctuation independent winding permanent-magnetism linear motor, winding and permanent magnet are respectively positioned in primary, solely Vertical winding construction makes winding technique technique simple, it is easy to accomplish cooling, is conducive to improving electromagnetic load, so as to carry, to do thrust close Degree.
2nd, on low-thrust of the invention fluctuation independent winding permanent-magnetism linear motor, the adjustable magnetic between two unit motors is passed through Structure design, enables even-times electromagnetism and the harmonics of magnetic force that the special field structure of motor is produced to offset, compared to without adjustable magnetic knot Structure, can be such that the force oscillation rate of motor is dropped to by more than 30% within 4%;
3rd, low-thrust of the invention fluctuation independent winding permanent-magnetism linear motor, secondary structure is simple, it is easy to process, using double During primary structure, ideally without unilateral magnetic force in secondary, during using single-side structural, unilateral magnetic force is much smaller than tradition forever Magnetic-synchro linear electric motors.Secondary mass is light, when using trigger switch, under identical thrust output, can obtain bigger acceleration and Speed.
3rd, under low-thrust of the invention fluctuation independent winding permanent-magnetism linear motor, each vat, by permanent magnet and adjacent It is unshakable in one's determination form the alternate magnetic fields of N-S, compared to the opposite permanent magnet formation N-S magnetic field structures of traditional two pieces of magnetizing directions, permanent magnetism Body consumption halves, and the block number of permanent magnet and the overload performance of motor are related, can flexibly set the permanent magnet of different block numbers, with Different application occasion is met to motor output performance and cost requirement;
4th, low-thrust of the invention fluctuation independent winding permanent-magnetism linear motor, it is easy to accomplish each unit motor and each phase winding Modularized design and application, each unit motor are relatively independent, the also very little of the magnetic coupling between each phase, when some unit motor or certain During phase winding failure, other unit motors and other phases are not influenceed, it is easy to accomplish faults-tolerant control, be conducive to improving the reliable of motor Property.
Brief description of the drawings
Fig. 1 is that the dual-side flat plate type low-thrust of embodiment one fluctuates independent winding permanent-magnetism linear motor structural representation.
Fig. 2 is single primary core construction schematic diagram
Fig. 3 is secondary iron core structural representation
Fig. 4 is magnetic line of force schematic diagram at maximum magnetic linkage position.
Fig. 5 is magnetic line of force schematic diagram at minimum magnetic linkage position.
Fig. 6 be each groove of embodiment two under use the single tooth slot structure schematic diagram of uneven number of permanent magnets.
Fig. 7 be each groove of embodiment three under use the single tooth slot structure schematic diagram of even number of permanent magnets.
Fig. 8 is that the magnetism-regulating structure of embodiment four uses magnetic conduction magnetism-regulating structure schematic diagram.
Fig. 9 is that the magnetism-regulating structure of embodiment five is non-magnetic magnetism-regulating structure schematic diagram.
Figure 10 is the electric machine structure schematic diagram slotted on the magnetism-regulating structure of embodiment six.
Figure 11 is the unilateral plate low-thrust fluctuation independent winding permanent-magnetism linear motor structural representation of embodiment seven.
In figure:1- armature winding;2- is primary unshakable in one's determination;The primary yokes unshakable in one's determination of 2-1-;The primary canine tooths unshakable in one's determination of 2-2-;2-3- primary iron Intracardiac yoke;The primary small teeth unshakable in one's determination of 2-4-;3- permanent magnets;4- air gaps, 5- secondary iron cores;6- level gap;7- vats;8- sulculuses, 9- magnetism-regulating structures, 9-1- magnetic conduction magnetism-regulating structures, the non-magnetic magnetism-regulating structures of 9-2-;9-2- slots.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings
Embodiment one:
As shown in Figure 1, 2, 3, the present embodiment is that dual-side flat plate type low-thrust fluctuates independent winding permanent-magnetism linear motor.It is wrapped Include two primary components, a secondary component and two air gaps.Single primary component includes armature winding 1, primary iron core 2 and forever Magnet 3.It is canine tooth 2-3 to be opened inside primary iron core 2 between vat 7, adjacent vat, and the number of vat 7 is number of phases M integral multiple, Armature winding 1 is set in groove, and primary iron core 2 opens n sulculus 8 in the primary towards air gap 4 is unshakable in one's determination on yoke 2-3, and (n is integer, n >=1), formed in sulculus 8 and primary small tooth 2-4 unshakable in one's determination separately structure, sulculus 8 and permanent magnet 4 is installed.For three phase electric machine, phase Adjacent mutually primary iron core tooth top 2-3 width is that (k ± 2/3) τ, K is odd number.Secondary component is between the secondary iron core 5 and secondary of magnetic conduction Gap 6 is constituted.The distance between neighboring secondary iron core 5 is 2 τ, i.e., be 2 τ formation arrays according to the cycle.Primary component and secondary group Air gap 4 is formed between part.M primary vat 7 and its corresponding secondary, gap structure, form a unit motor.It is primary unshakable in one's determination The magnetism-regulating structure 9 that spacing is (2N+1) τ (N=0,1,2 ...) is set on 2, between adjacent cells motor, the different lists of regulation are played Phase in the effect of first motor-field harmonic wave, adjacent cells motor with phase winding 1-1 and 1-2 need to reversely be set.The motor it is every In individual primary, the magnetizing direction of permanent magnet 3 is that permanent magnet 3-1 and 3-2 is in opposite direction in same direction, but different primary components, is Perpendicular to air gap, but refer in the opposite direction.For improvement Distribution of Magnetic Field, the width of permanent magnet 3 and small tooth can be separately designed as τ + a, τ-a, a value are the τ of -0.5 τ≤a≤0.5
The working process and principle of the low-thrust fluctuation independent winding permanent-magnetism linear motor of the present invention are as follows:
As shown in Figure 4,5, the magnetic flux that primary permanent magnet body is sent, through air gap 4, secondary iron core 5, primary small tooth 2-4 unshakable in one's determination, just Level canine tooth 2-3 unshakable in one's determination, forms series connection flux closure loop, and with the linkage of armature winding 1, it is secondary and primary as mover is moved Relative position changes, and is changed with the magnetic flux size and Orientation of armature winding linkage, so as to produce sensing in armature winding 1 Potential.Corresponding electric current is passed through in armature winding, motor is the thrust for producing horizontal direction.
Embodiment two:
As shown in fig. 6, the present embodiment and the difference of embodiment one are:Polylith permanent magnet is set under each groove, odd number is forever Magnet 3 and the small tooth 2-4 of even number are alternately arranged.
Embodiment three:
As shown in fig. 7, the present embodiment and the difference of embodiment two are:Polylith permanent magnet is set under each groove, even number is forever Magnet 3 and the small tooth 2-4 of odd number are alternately arranged..
Embodiment four:
As shown in figure 8, the present embodiment and the difference of embodiment one, six are:Magnetism-regulating structure 9 uses magnetic conduction magnetism-regulating structure 9-1, Can be with primary being integrally formed of iron core structure, magnetic conduction magnetism-regulating structure 9-1 width is (2N+1) τ (N=0,1,2 ...).
Embodiment five:
As shown in figure 9, the present embodiment and the difference of embodiment one are:Magnetism-regulating structure 9 is non-using air, non-magnetic alloy etc. Magnetic conduction magnetism-regulating structure 9-2, non-magnetic magnetism-regulating structure 9-2 width are (2N+1) τ, and the unit motor on magnetism-regulating structure both sides turns into magnetic Completely self-contained two motors on road.
Embodiment six:
As shown in Figure 10, the present embodiment and the difference of embodiment one, six, seven be:Using on solid magnetism-regulating structure 9 can be with Using fluting 9-3 structures, to mitigate motor quality.
Embodiment seven:
As shown in figure 11, the present embodiment and the difference of embodiment one be:Motor uses unilateral flat structure, positioned at primary On all permanent magnets 3 magnetizing direction all same, be perpendicular to air gap direction.

Claims (10)

1. low-thrust fluctuates independent winding permanent-magnetism linear motor, it includes primary component, secondary component and air gap, can be using flat Template or cylindrical structure.Primary component includes armature winding 1, primary iron core 2 and permanent magnet 3.Vat is opened inside primary iron core 2 7, it is canine tooth 2-3 between adjacent vat, the number of vat 7 is that armature winding 1 is set in number of phases M integral multiple, groove, primary unshakable in one's determination 2 open n sulculus 8 in the primary towards air gap 4 is unshakable in one's determination on yoke 2-3 (n is integer, n >=1), forms sulculus 8 and primary iron core is small Permanent magnet 4 is installed in tooth 2-4 separately structures, sulculus 8.For three phase electric machine, adjacent phase primary iron core tooth top 2-3 width is (k ± 2/3) τ, K is odd number.Secondary component is that the secondary iron core 5 of magnetic conduction and secondary gap 6 are constituted.Between neighboring secondary iron core 5 Distance is 2 τ, i.e., be 2 τ formation arrays according to the cycle.Air gap 4 is formed between primary component and secondary component.M primary vat 7 And its corresponding secondary, gap structure, form a unit motor.On primary iron core 2, spacing is set between adjacent cells motor For (2N+1) τ (N=0,1,2....) magnetism-regulating structure 9, play a part of adjusting different units motor-field harmonic wave, adjacent list Phase in first motor with phase winding 1-1 and 1-2 needs oppositely arranged.
2. low-thrust according to claim 1 fluctuates independent winding permanent-magnetism linear motor, it is characterised in that sulculus 8 and forever The width of magnet 3 is (τ+a), and small tooth 2-4 width is (τ-a), and a span is:-τ/2≤a≤τ/2.
3. low-thrust according to claim 1 fluctuates independent winding permanent-magnetism linear motor, it is characterised in that for bilateral flat The motor of plate profile structure, positioned at it is each primary on permanent magnet 3 magnetizing direction it is identical, but in two primary permanent magnet 3-1 with 3-2 magnetizing direction is opposite each other, perpendicular to air gap, but refers in the opposite direction.
4. low-thrust according to claim 1 fluctuates independent winding permanent-magnetism linear motor, it is characterised in that of sulculus 8 The block number of number and permanent magnet 3 is odd number, and small tooth 2-4 number is then even number.
5. low-thrust according to claim 1 fluctuates independent winding permanent-magnetism linear motor, it is characterised in that of sulculus 8 The block number of number and permanent magnet 3 is even number, and small tooth 2-4 number is then odd number.
6. low-thrust according to claim 1 fluctuates independent winding permanent-magnetism linear motor, it is characterised in that magnetism-regulating structure 9 Magnetic conduction magnetism-regulating structure 9-1 can be used, the width of magnetic conduction construction is (2N+1) τ (N=0,1,2....).
7. low-thrust according to claim 1 fluctuates independent winding permanent-magnetism linear motor, it is characterised in that magnetism-regulating structure 9 Can be using non-magnetic magnetism-regulating structure 9-2 such as air, non-magnetic alloys, non-magnetic magnetism-regulating structure 9-2 width is (2N+1) τ, The unit motor on magnetism-regulating structure both sides turns into completely self-contained two motors on magnetic circuit.
8. the low-thrust fluctuation independent winding permanent-magnetism linear motor according to claim 1,6,7, it is characterised in that solid Can be using fluting 9-3 schemes, to mitigate motor quality on magnetism-regulating structure 9.
9. low-thrust according to claim 1 fluctuates independent winding permanent-magnetism linear motor, it is characterised in that for unilateral flat The motor of plate profile structure, the magnetizing direction all same of all permanent magnets 3 in primary, is perpendicular to air gap direction.
10. low-thrust according to claim 1 fluctuates independent winding permanent-magnetism linear motor, it is characterised in that:For cylinder The motor of type structure, the magnetizing direction of the permanent magnet 3 in primary is identical, is, perpendicular to air gap, to point to radial direction.
CN201710340964.4A 2017-05-09 2017-05-09 Low-thrust fluctuates independent winding permanent-magnetism linear motor Pending CN107086756A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108023460A (en) * 2018-02-02 2018-05-11 上海莫戈纳机电科技有限公司 Linear electric machine
CN112953158A (en) * 2021-01-11 2021-06-11 南京航空航天大学 Bilateral permanent magnet staggered modular continuous pole permanent magnet synchronous linear motor
CN113572338A (en) * 2021-07-28 2021-10-29 合肥工业大学 Thrust fluctuation compensation type secondary of annular winding permanent magnet linear synchronous motor
CN115995934A (en) * 2023-02-27 2023-04-21 哈尔滨工业大学 Independent winding multi-rotor linear motor and thrust fluctuation suppression method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6476524B1 (en) * 1998-02-13 2002-11-05 Kabushiki Kaisha Yaskawa Denki Linear motor
US20090009010A1 (en) * 2007-07-05 2009-01-08 Korea Electrotechnology Research Institute Low-Noise, High-Speed, High Precision and High-Thrust Flux Reversal Motor for Linear or Rotary Motion System
CN104065234A (en) * 2013-11-28 2014-09-24 南京航空航天大学 Bilateral primary permanent magnet linear motor without yoke at secondary
CN106100283A (en) * 2016-07-21 2016-11-09 南京航空航天大学 Independent winding dual-side flat plate type permanent-magnetism linear motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6476524B1 (en) * 1998-02-13 2002-11-05 Kabushiki Kaisha Yaskawa Denki Linear motor
US20090009010A1 (en) * 2007-07-05 2009-01-08 Korea Electrotechnology Research Institute Low-Noise, High-Speed, High Precision and High-Thrust Flux Reversal Motor for Linear or Rotary Motion System
CN104065234A (en) * 2013-11-28 2014-09-24 南京航空航天大学 Bilateral primary permanent magnet linear motor without yoke at secondary
CN106100283A (en) * 2016-07-21 2016-11-09 南京航空航天大学 Independent winding dual-side flat plate type permanent-magnetism linear motor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108023460A (en) * 2018-02-02 2018-05-11 上海莫戈纳机电科技有限公司 Linear electric machine
CN112953158A (en) * 2021-01-11 2021-06-11 南京航空航天大学 Bilateral permanent magnet staggered modular continuous pole permanent magnet synchronous linear motor
CN112953158B (en) * 2021-01-11 2023-09-19 南京航空航天大学 Double-sided permanent magnet staggered modularized continuous pole permanent magnet synchronous linear motor
CN113572338A (en) * 2021-07-28 2021-10-29 合肥工业大学 Thrust fluctuation compensation type secondary of annular winding permanent magnet linear synchronous motor
CN113572338B (en) * 2021-07-28 2022-06-07 合肥工业大学 Thrust fluctuation compensation type secondary of annular winding permanent magnet linear synchronous motor
CN115995934A (en) * 2023-02-27 2023-04-21 哈尔滨工业大学 Independent winding multi-rotor linear motor and thrust fluctuation suppression method thereof
CN115995934B (en) * 2023-02-27 2023-07-21 哈尔滨工业大学 Independent winding multi-rotor linear motor and thrust fluctuation suppression method thereof

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