CN105141049B - A kind of low cost high powered density permanent magnetic linear electric generator of simplex winding - Google Patents

A kind of low cost high powered density permanent magnetic linear electric generator of simplex winding Download PDF

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CN105141049B
CN105141049B CN201510694316.XA CN201510694316A CN105141049B CN 105141049 B CN105141049 B CN 105141049B CN 201510694316 A CN201510694316 A CN 201510694316A CN 105141049 B CN105141049 B CN 105141049B
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stator
permanent magnet
mover
winding
tooth
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CN105141049A (en
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王道涵
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Shandong University
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Shandong University
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Abstract

The invention discloses a kind of low cost high powered density permanent magnetic linear electric generator of simplex winding, even number stator tooth is evenly arranged with its stator, stator slot is equipped with two neighboring stator tooth, permanent magnet is equipped between stator slot yoke and stator back yoke, main air gap is equipped between the mover tooth of the stator tooth and mover, the magnetic flux that adjacent two pieces of permanent magnets produce enters mover by main air gap and forms main flux;Permanent magnet is not rotated with mover, a set of armature winding is laid in two neighboring stator slot, groove where armature winding a from armature winding penetrates, it is pierced by from adjacent armature slot, winding in two neighboring armature slot forms an armature coil, each armature coil is across two stator tooths away from the size of current of winding is identical in two neighboring armature slot, and direction is opposite.The present invention only has a set of winding, and when operation only needs to control size of current and the direction of a set of armature winding, and power circuit only needs two device for power switching.

Description

A kind of low cost high powered density permanent magnetic linear electric generator of simplex winding
Technical field
The present invention relates to a kind of low cost high powered density permanent magnetic linear electric generator of simplex winding.
Background technology
The electric energy inputted can be converted into straight line kinetic energy by linear motor driver in required occasion, real Now move along a straight line, save the machine driving conversion equipment in traditional rotation-straight line conversion type of drive, substantially reduce transmission dress The volume put, improves the reliability and efficiency of whole system, and effectively reduces the cost and maintenance cost of equipment, not only such as This, also has the high speed that traditional rotation-straight line conversion type of drive is unable to reach, high accuracy and robustness.Further, since transmission turns Changing device can dramatically increase vibration and the noise of transmission system, reduce the control accuracy and performance of system.Therefore, in modern industry In production process, especially all particular applications, such as precision instrument, aero-space instrument, Medical Instruments etc., straight line electric Machine is more and more widely used.
The kinetic energy that linear motion produces directly can be converted into electric energy by linear electric generator, and hair is directly driven using linear electric generator Electricity, can significantly increase the being mutually matched property of machinery of moving component and power generator, kinetic energy capture rate is high, especially in the straight of low speed Line kinematic system, more has advantage using linear electric generator.
At present, linear electric generator has a following species, 1) linear induction generator, its feature are:End effect is obvious, especially When it is high-speed cruising, end effect causes motor propulsive force to be obviously reduced;Efficiency and power factor are all than relatively low, usual efficiency 50%~60%, power factor only has 0.5 or so, and control system and control strategy are extremely complex;2) permanent magnet linear generator, There is high power density and high efficiency, directly drive electricity generation system applied to ocean wave energy at present.But existing permanent magnetism The permanent magnet of linear motor is mostly on mover, and as mover moves reciprocatingly, the magnetic property of permanent-magnet material is easily by temperature, rust The influence of the external environmental factor such as erosion and vibration, therefore, for the more severe occasion of running environment, permanent magnet linear generator is simultaneously It is inapplicable;3) straight line switch reluctance generator, motor body is simple in structure, and manufacture cost is low, and operational reliability is high, and having can The advantage run under various mal-conditions, maintenance cost are low.In addition, its whole system efficiency is moved higher than linear induction Machine, and with broad economical operation scope, can be realized by various flexible control strategies a series of gratifying Performance, but linear switched reluctance motor power density is relatively low.
In recent years, with the raising of permanent-magnet material resistance to elevated temperatures and the reduction of price, magneto is in national defence, industrial or agricultural Production and daily life etc. are more widely applied, and positive high-power, high performance and micromation direction are developed. For the power of magneto from several milliwatts to several megawatts, application range draws use from toy motor, commercial Application to naval vessel at present Large-scale magneto, be widely applied in the various aspects of national economy, daily life, war industry, aerospace, Similar with permanent magnet rotating electric machine, existing permanent-magnetism linear motor winding is generally 3 phases, and stator slot number is more, and winding inserting technique is answered Miscellaneous, manufacture is of high cost;Existing most of permanent-magnetism linear motor permanent magnets are located on mover, and when operation moves with mover, forever Magnet need to be fixed using special procedure, and manufacture is of high cost, and when especially motor operation speed is higher, permanent magnet fixes difficulty, due to Permanent magnet is located on mover, and heat dissipation is difficult during operation, temperature rise and caused by reciprocating motion vibration can cause permanent magnet machine Tool structural failure and generation irreversible demagnetization;Existing permanent-magnetism linear motor is generally three-phase, it is desirable to the power inversion circuit of motor At least need 6 device for power switching, such as IGBT or MOSFET, and the corresponding driving device for power switching Drive circuit and protection circuit so that power of motor inverter circuit cost is at a relatively high, and even up to the two of motor body cost arrive Three times, quantity of power switches, which increases, adds control circuit complexity, the possibility increase of device failure, operation When system reliability reduce.Existing permanent-magnetism linear motor be mostly permanent magnet directly facing air gap, permanent magnet, which faces, to move back Magnetic is dangerous, moreover, the existing permanent-magnetism linear motor winding number of phases is more, iron core inside groove number is more, winding inserting complex process during manufacture, Iron core dosage is big, and motor quality is big, and stock utilization is low when electric power generation is run, and therefore, it is few to seek a kind of winding number of phases, iron core Dosage is few, and motor body manufacturing process is simple, and permanent magnet is located on stator, and easy for installation, cost is low, power circuit switching device Number is few, controller and power circuit cost it is low permanent magnet linear generator it is most important.
The content of the invention
The present invention is to solve the above-mentioned problems, it is proposed that a kind of low cost high powered density permanent magnetic linear generating of simplex winding Machine, only a set of stator armature winding, and a set of armature is only laid in each groove of motor on the stator of this permanent magnet motor Winding, phase insulation is not required in groove, and copper factor is high, and machine winding down line process is simple, and whole cost is each less than existing Class three-phase induction motor and magneto;Permanent magnet is fixed on stator, is not moved back and forth with mover, easy for installation, is conducive to Heat dissipation, eliminates common permanent-magnetism linear motor since the mechanical stress that permanent magnet is moved back and forth with mover and is produced is damaged, permanent magnetism The shortcomings of body heat dissipation is bad.
To achieve these goals, the present invention adopts the following technical scheme that:
A kind of low cost high powered density permanent magnetic linear electric generator of simplex winding, including stator, mover and main air gap, wherein:
Even number stator tooth is evenly arranged with the stator, stator slot, stator slot yoke are equipped with two neighboring stator tooth Permanent magnet is equipped between stator back yoke, is equipped with main air gap between the mover tooth of the stator tooth and mover, described adjacent two pieces The magnetic flux that permanent magnet produces enters mover by main air gap and forms main flux;
The permanent magnet is not rotated with mover, and the magnetizing direction of the permanent magnet on same stator slot yoke is identical, and adjacent two The magnetizing direction of permanent magnet in a stator slot yoke portion is opposite;
A set of armature winding is laid in two neighboring stator slot, groove where armature winding a from armature winding penetrates, It is pierced by from adjacent armature slot, the winding in two neighboring armature slot forms an armature coil, and each armature coil is across two A stator tooth is away from the size of current of winding is identical in two neighboring armature slot, and direction is opposite.
Further, during motor operation, it is only necessary to control size of current and the direction of a set of armature winding, armature supply magnetic The magnetic field interaction that field and permanent magnet produce causes the magnetic flux on stator tooth mutually to strengthen or offset, and stator field is at some Continuously open or turn off on direction, produce torque using magnetic resistance change rate between stator and mover and generate electricity.Only placed in stator slot There is a set of armature winding, phase insulation is not required in stator slot, groove utilization rate is high, and winding inserting technique is simple, and manufacture cost is low.
The setting that permanent magnet is not rotated with mover so that it is easy for installation, be conducive to radiate, eliminate common single-phase permanent electricity Machine is radiated the shortcomings of bad due to the mechanical stress damage that permanent magnet is rotated with mover and is produced with permanent magnet.
Further, every piece of permanent magnet is magnetized by a monoblock permanent magnet forms or is spelled by the permanent magnet of polylith narrower width Connect and form, the width of the permanent magnet may be the same or different.
The number of the stator tooth is the even number more than or equal to 2.
The number of the mover tooth is more than or equal to the 1/2 of stator tooth number.
The block number number of the permanent magnet is m times of mover tooth, and m is the natural number more than or equal to 1.
The stator tooth, stator slot yoke, stator back yoke and mover tooth are formed by silicon steel plate stacking or by high magnetic permeability Core material is made.
The permanent magnet is in close contact with stator back yoke iron core and stator slot yoke core.
Described two adjacent stator tooths are connected by stator slot yoke, each two stator tooth and between stator slot yoke formed One piece of integrated iron core, the interior integrated iron core block number of motor is the 1/2 of stator tooth number.
The width of the permanent magnet of the motor can flexibly be determined by the magnetic energy product according to permanent magnet or residual flux density, The residual flux density of permanent magnet can be determined according to the design air gap flux density of motor, then is come really by varying the pole embrace of permanent magnet Determine the magnetic energy product of permanent magnet, and existing magneto usually only uses high-performance since pole embrace is limited be subject to number of poles Permanent magnet could meet the needs for designing flux density.
The permanent magnet is either the permanent-magnet material such as neodymium iron boron of high energy product can also be the permanent magnetism material of low magnetic energy product Material such as ferrite or aluminium nickel cobalt are made.
The present invention operation principle be:
Stator core and mover core is formed using silicon steel plate stacking or the core material of high permeability is once made, when During armature winding no power, the magnetic flux that the permanent magnet produces passes through stator slot yoke, and stator tooth and main air gap edge flow into mover tooth, The permanent magnet under main air gap reaches another extremely is flowed out to by adjacent mover tooth again, and is closed by stator back yoke, is formed The main flux of motor.When armature winding is powered, the magnetic field that armature winding electric current produces causes armature slot two where armature winding Different polarity is presented in the stator tooth of side respectively, and the magnetic fields produced with permanent magnet are superimposed so that a stator tooth shows pole Property, there is main flux magnetic flux process, another adjacent stator tooth does not have polarity, and no magnetic flux flows through, since armature winding is every one A groove is set, and the stator tooth for therefore, in motor having half has polarity, and the stator tooth of half does not have polarity, minimum according to magnetic resistance Principle, will move to mover makes mover tooth with having the position that the stator tooth of polarity overlaps, since the mover number of teeth is stator tooth Several half, at this time just each mover tooth with stator tooth face, this position for mover tooth and stator tooth aligned position, The inductance of this position correspondence is maximum and magnetic resistance is minimum.At this time, mover continues to move, keep armature winding in sense of current not Become, by the power of its movement hindered, and generator operation, continues to be powered in inductance last transition, power generation process will always mover Persistently, after stator and mover align once again, the direction of armature supply is changed so that the stator tooth without polarity was shown just now Polarity, and the stator tooth of original polarized does not show polarity, mover continues stress and generates electricity, this process will repeat always, hair Electric process is continued for.
Beneficial effects of the present invention are:
(1) motor of the present invention only has a set of winding, and when operation only needs to control size of current and the side of a set of armature winding To power circuit only needs two device for power switching, and common three phase electric machine needs at least six device for power switching, motor Device for power switching number is few needed for controller, and cost is low;
(2) magnetic field that armature winding and permanent magnet produce during motor operation of the present invention mutually strengthens or supports on the stator teeth Disappear, during motor operation armature winding and Exciting Windings for Transverse Differential Protection complete period be powered at the same time, therefore, have that power density is high, stock utilization The advantages of high, the motor of same design power, motor of the present invention save material utilization amount, reduce cost;
(3) motor permanent magnet of the present invention is fixed on stator, is not rotated with mover, easy for installation, is conducive to radiate, and is eliminated Since the mechanical stress that permanent magnet is rotated with mover and is produced is damaged, the permanent magnet bad grade that radiates lacks for common electric machine Point;
(4) a set of winding is only laid in each stator slot of motor of the present invention, which is simple concentratred winding, from one A armature slot penetrates, and is pierced by outward direction along on the outside of stator back yoke, forms a coil, and armature winding surrounds stator slot yoke, Permanent magnet and the winding of stator back yoke, winding construction is simple and simplifies inserting-coil process, can effectively reduce End winding length, subtract Few copper consumption, effectively reduces motor cost and reduces the copper loss of motor, improves efficiency, and the armature winding of each armature slot forms 1 Coil is covered, all coils can be parallel with one another or connect, and machine winding inserting-coil process is simple, need not be placed in groove alternate exhausted Edge, is conducive to improve copper factor and groove utilization rate;
(5) permanent magnet in motor of the present invention can be one piece of permanent magnet integrally to magnetize, can also be by polylith permanent magnet It is spliced, therefore manufacturing process is simple, cost is low, improves since the cost of the permanent magnet of motor wider width is higher, machine Easily ruptured during tool stress, when installation is more difficult, and mechanical strength is spliced not as good as the less permanent magnet of polylith width Problem;
(6) width of the permanent magnet of motor of the present invention can be according to the design magnetic energy product or design residual flux density of permanent magnet Flexibly determine, so motor of the present invention can use the permanent magnet of high energy product or the permanent magnet using low magnetic energy product, High energy product permanent magnet and low magnetic energy product permanent magnet mix and match can also be used, solves existing magneto due to polar arc system Number is limited be subject to number of poles, usually there was only the problem of could meeting high performance motor needs using high-performance permanent magnet.
Brief description of the drawings
Fig. 1 is the power converter circuit figure of motor of the present invention;
Fig. 2 is existing brushless direct current permanent magnetic and permanent magnet synchronous motor power converter circuit figure;
Fig. 3 is 1 structure diagram of motor embodiment of the present invention;
Fig. 4 is 2 structure diagram of motor embodiment of the present invention;
Wherein, 1. stator tooth, 2. stator back yokes, 3. stator slot yokes, 4. armature slots, 5. armature winding, 6. permanent magnets, 7. is dynamic Sub- tooth, 8. mover grooves, 9. main air gaps.
Embodiment:
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
A kind of low cost high powered density permanent magnetic linear motor of simplex winding, it includes stator, mover and main air gap, described Stator includes permanent magnet, stator yoke, stator tooth, stator slot and stator winding;The mover includes mover tooth and mover groove;Stator Yoke includes stator slot yoke and stator back yoke, and stator slot yoke is located at stator trench bottom close to lateral direction, stator slot yoke and the stator back of the body Permanent magnet is equipped between yoke, permanent magnet is not moved with mover, easy for installation, is conducive to radiate, and eliminates common permanent-magnet linear hair Motor is since the mechanical stress damage that permanent magnet is moved with mover and is produced is radiated the shortcomings of bad with permanent magnet, every piece of permanent magnet Both it can be magnetized and formed by a monoblock permanent magnet, can also be spliced by the permanent magnet of polylith narrower width, the width of permanent magnet Degree may be the same or different, and the magnetizing direction of the permanent magnet on the same stator slot yoke is identical, two neighboring stator The magnetizing direction of permanent magnet in groove yoke portion is opposite;The magnetic flux that adjacent two pieces of permanent magnets produce is formed by main air gap into mover Main flux;The stator slot is armature winding place groove (armature slot), and a set of armature winding, motor operation are laid in armature slot When, it is only necessary to size of current and the direction of a set of armature winding are controlled, the magnetic field that armature supply magnetic field and permanent magnet produce is mutual Effect so that the magnetic flux on stator tooth mutually strengthens either offsets stator field and continuously open or turn off in a certain direction, Torque is produced using magnetic resistance change rate between stator and mover and is generated electricity;Main air gap is equipped between stator tooth and the mover tooth.
The number n of motor stator toothsMeet:ns=2*n, wherein n are greater than the natural number equal to 1.
The number n of electric mover toothrWith the number n of motor stator toothsMeet:nr≥ns/2。
The block number n of permanent magnetpmWith the number n of motor stator toothsMeet:npm/ m=0.5*ns, m is oneself more than or equal to 1 So number.
A set of armature winding is only laid in stator slot, phase insulation is not required in stator slot, groove utilization rate is high, under winding Wiring technology is simple, and manufacture cost is low.
Motor stator tooth, stator slot yoke, stator back yoke and mover tooth are formed by silicon steel plate stacking or by high magnetic permeability Core material is made.
Permanent magnet is in close contact with stator back yoke iron core and stator slot yoke core.
Two adjacent stator tooths are connected by stator slot yoke, each two stator tooth and between stator slot yoke formed one piece Integrated iron core, the interior integrated iron core block number n of motorcMeet nc=ns/2。
Groove where armature winding a from armature winding penetrates, and is pierced by from adjacent armature slot, in two neighboring armature slot Winding form an armature coil, each armature coil is across two stator tooths away from the electricity of winding in two neighboring armature slot Stream size is identical, and direction is opposite.
The width of the permanent magnet of motor can flexibly be determined by the magnetic energy product according to permanent magnet or residual flux density, can be with The residual flux density of permanent magnet determined according to the design air gap flux density of motor, then is determined forever by varying the pole embrace of permanent magnet The magnetic energy product of magnet, and existing magneto usually only uses high-performance permanent magnet since pole embrace is limited be subject to number of poles Body could meet the needs for designing flux density.
Permanent magnet either the permanent-magnet material such as neodymium iron boron of high energy product can also be the permanent-magnet material of low magnetic energy product such as Ferrite or aluminium nickel cobalt are made.
As shown in Figure 1, groove where the armature winding a from armature winding penetrates, it is pierced by from adjacent armature slot, phase Winding in adjacent two armature slots forms an armature coil, and each armature coil is across two stator tooths away from two neighboring electricity The size of current of winding is identical in pivot groove, and direction is opposite.Only have a set of armature winding A to lead to exchange during electric power generation operation of the present invention Electric current, therefore the control circuit of motor only needs two electric and electronic power switching devices, such as IGBT or MOSFET.
As shown in Fig. 2, have on existing all kinds of induction conductivities and permanent magnet motor stator three-phase and the armature of the above around Group is, it is necessary at least six electric and electronic power switching device.Therefore, switching device needed for the control system of motor of the present invention is few, into This is low, simple in structure.Further, since device for power switching number is few, reduces device for power switching in circuit for controlling motor and send out The possibility of raw failure, reliability improve.
Embodiment one:
The motor stator number of teeth is 8, and the mover number of teeth is 4, and permanent magnet block number is 4, and present embodiment includes stator, mover and master Air gap, stator include stator core, permanent magnet and stator slot, and stator core includes stator tooth 1, stator back yoke 2 and stator slot yoke 3, stator core is made of high permeability ferromagnetic material, and stator core is equipped with stator slot, and stator slot is armature slot 4, armature slot Armature winding 5 is inside laid, armature winding 5 is penetrated from an armature slot, is pierced by from another adjacent armature slot, forms one Coil so that the size of current in per two neighboring armature slot is identical, and direction is opposite;Pacify between stator slot yoke 3 and stator back yoke 2 It is placed with permanent magnet 6, for permanent magnet 6 using the ferrite permanent magnet material of low magnetic energy product, permanent magnet 6 takes parallel magnetization, and adjacent two The magnetizing direction of block permanent magnet is opposite;Mover includes mover tooth 7 and mover groove 8, and mover tooth 7 is distributed along axisymmetrical, mover tooth 7 Main air gap 9 is equipped between stator tooth 1.
Embodiment two:
As shown in figure 4, the motor stator number of teeth is 8, the mover number of teeth is 4, and permanent magnet block number is 12, and present embodiment includes fixed Son, mover, main air gap, stator include stator core, permanent magnet and stator slot, and stator core includes stator tooth 1, stator back yoke 2 With stator slot yoke 3, stator core is made of high permeability ferromagnetic material, and stator core is equipped with stator slot, and stator slot is armature Groove 4, lays armature winding 5 in armature slot 4, armature winding 5 is penetrated from an armature slot, is worn from another adjacent armature slot Go out, form a coil so that the size of current in per two neighboring armature slot is identical, and direction is opposite;Stator slot yoke 3 and stator Permanent magnet 6 is laid between back yoke 2, there are 3 pieces of permanent magnets on each stator slot yoke 3, permanent magnet 6 uses the neodymium iron boron of high energy product Permanent magnet material, the magnetizing direction of 3 pieces of permanent magnets on same stator slot yoke is identical, the permanent magnetism on adjacent different stator slot yokes The magnetizing direction of body is opposite;Mover includes mover tooth 7 and mover groove 8, and main air gap 9 is equipped between mover tooth 7 and stator tooth 1.
Meanwhile motor provided by the invention, according to the difference of its application field, those skilled in the art are directed to concrete application The difference of environment and object, to the electric machine structure of the present invention without creative change, be readily apparent that, should also be subordinate to Belong to protection scope of the present invention.
Although above-mentioned be described the embodiment of the present invention with reference to attached drawing, model not is protected to the present invention The limitation enclosed, those skilled in the art should understand that, on the basis of technical scheme, those skilled in the art are not Need to make the creative labor the various modifications that can be made or deformation still within protection scope of the present invention.

Claims (6)

1. a kind of low cost high powered density permanent magnetic linear electric generator of simplex winding, including stator, mover and main air gap, wherein:
Be evenly arranged with even number stator tooth on the stator, i-th of stator tooth and adjacent i+1 stator tooth behind it Between be equipped with stator slot, i is odd number, and permanent magnet, the mover of the stator tooth and mover are equipped between stator slot yoke and stator back yoke Main air gap is equipped between tooth, the magnetic flux that adjacent two pieces of permanent magnets produce enters mover by main air gap and forms main flux;
It is characterized in that:The permanent magnet is not moved with mover, and the magnetizing direction of the permanent magnet on same stator slot yoke is identical, phase The magnetizing direction of permanent magnet on adjacent two stator slot yokes is opposite;
A set of armature winding is laid in two neighboring stator slot, armature winding is penetrated from a stator slot, from adjacent stator Groove is pierced by, and the winding in two neighboring stator slot forms an armature coil, and each armature coil is across two stator tooths away from phase The size of current of winding is identical in adjacent two stator slots, direction is opposite;
During motor operation, size of current and the direction of a set of armature winding are only controlled, what armature supply magnetic field and permanent magnet produced Magnetic field interaction causes the magnetic flux on stator tooth mutually to strengthen or offset, stator field continuously open in a certain direction or Person turns off, and produces torque using magnetic resistance change rate between stator and mover and generates electricity;
The permanent magnet is in close contact with stator back yoke iron core and stator slot yoke core;
Described two adjacent stator tooths are connected by stator slot yoke, each two stator tooth and between stator slot yoke formed one piece Integrated iron core, the interior integrated iron core block number of motor is the 1/2 of stator tooth number.
2. a kind of low cost high powered density permanent magnetic linear electric generator of simplex winding as claimed in claim 1, it is characterized in that:It is described The number of stator tooth is the even number more than or equal to 2.
3. a kind of low cost high powered density permanent magnetic linear electric generator of simplex winding as claimed in claim 1, it is characterized in that:It is described The number of mover tooth is more than or equal to the 1/2 of stator tooth number.
4. a kind of low cost high powered density permanent magnetic linear electric generator of simplex winding as claimed in claim 1, it is characterized in that:It is described The block number number of permanent magnet is m times of mover tooth, and m is the natural number more than or equal to 1.
5. a kind of low cost high powered density permanent magnetic linear electric generator of simplex winding as claimed in claim 1, it is characterized in that:It is described Stator tooth, stator slot yoke, stator back yoke and mover tooth are formed by silicon steel plate stacking or are made of high magnetic permeability core material.
6. a kind of low cost high powered density permanent magnetic linear electric generator of simplex winding as claimed in claim 1, it is characterized in that:It is described The width of the permanent magnet of motor is flexibly determined according to the magnetic energy product or residual flux density of permanent magnet, according to the design air gap magnetic of motor The residual flux density of close definite permanent magnet, then determine the magnetic energy product of permanent magnet by varying the pole embrace of permanent magnet.
CN201510694316.XA 2015-10-22 2015-10-22 A kind of low cost high powered density permanent magnetic linear electric generator of simplex winding Active CN105141049B (en)

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JP2518279B2 (en) * 1987-05-28 1996-07-24 株式会社安川電機 Linear pulse motor
CN101562384B (en) * 2009-05-14 2011-01-05 浙江大学 Magnetic-field-enhanced permanent-magnetic switching flux linkage motor with high fault tolerance
CN101552497B (en) * 2009-05-14 2011-04-27 浙江大学 A mixed excitation biconvex pole motor T
CN201956761U (en) * 2010-07-08 2011-08-31 东南大学 Linear cylinder type switched flux permanent magnet generator
CN102005837B (en) * 2010-11-23 2012-05-30 东南大学 Magnetic flux-switching generator
CN102255471B (en) * 2011-06-24 2012-12-19 江苏中容电气有限公司 Linear switch magnetic flux permanent magnet motor with low location force and high thrust
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CN205081586U (en) * 2015-10-22 2016-03-09 山东大学 Low -cost high power density permanent magnet linear generator of simplex winding

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