CN105186734B - A kind of low cost high powered density permanent magnetic linear electric generator of single concentratred winding - Google Patents
A kind of low cost high powered density permanent magnetic linear electric generator of single concentratred winding Download PDFInfo
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- CN105186734B CN105186734B CN201510697061.2A CN201510697061A CN105186734B CN 105186734 B CN105186734 B CN 105186734B CN 201510697061 A CN201510697061 A CN 201510697061A CN 105186734 B CN105186734 B CN 105186734B
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Abstract
The invention discloses a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding, even number stator tooth is evenly arranged with its stator, stator slot is provided with two neighboring stator tooth, permanent magnet is provided between stator slot yoke and stator back yoke, main air gap is provided between the mover tooth of the stator tooth and mover, magnetic flux caused by the permanent magnet enters mover by main air gap and forms main flux；The permanent magnet does not rotate with mover, and the magnetizing direction of the permanent magnet on same stator slot yoke is identical, and the magnetizing direction of the permanent magnet in two neighboring stator slot yoke portion is opposite；A set of armature winding is laid in the stator slot, by controlling the magnetic flux caused by the current field and permanent magnet of a set of armature winding on magnetic field interaction stator tooth to change, torque is produced using magnetic resistance change rate between stator and mover.The present invention only has a set of winding, only needs to control size of current and the direction of a set of armature winding during operation, power circuit only needs two device for power switching.
Description
Technical field
The present invention relates to a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred 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 traditional rotation-straight line changes the high speed that 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 has obtained more and more extensive application.
Kinetic energy caused by linear motion directly can be converted into electric energy by linear electric generator, and hair is directly driven using linear electric generator
Electricity, the being mutually matched property of machinery of moving component and TRT can be significantly increased, kinetic energy capture rate is high, especially in the straight of low speed
Line kinematic system, more there is 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 electric motors 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 construction, and manufacturing 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 miniaturization direction are developed.
For the power of magneto from several milliwatts to several megawatts, application 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, Aero-Space,
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, manufacturing cost is high；Existing most of permanent-magnetism linear motor permanent magnets are located on mover, are moved with mover during operation, forever
Magnet need to be fixed using special procedure, and manufacturing cost is high, and when especially motor operation speed is higher, permanent magnet fixes difficulty, due to
Permanent magnet is located on mover, and radiating 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.
In addition, existing permanent-magnetism linear motor uses Distributed Winding or the concentratred winding across multiple pole spans more, general
For store-through in winding terminal minister, copper consumption is big, and manufacturing cost is high, and copper loss is big during motor operation, the shortcomings such as efficiency is low, especially for
Stator length is larger, the less motor of width, this shortcoming it is especially prominent, it is necessary to using special winding coil connected mode come
Reduce winding overhang, reduction copper, improve motor operation efficiency.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of single low cost high powered density permanent magnetic straight line hair of concentratred winding
Motor, only a set of stator armature winding, and a set of electricity is only laid in each groove of motor on the stator of this permanent magnet motor
Pivot winding, phase insulation is not needed in groove, copper factor is high, and machine winding down line process is simple, and whole cost is less than existing
All kinds of three-phase induction motors and magneto；Meanwhile there was only a set of armature winding indirect current stream during present invention operation, therefore electricity
The control circuit of machine only needs 2 electric and electronic power switching devices, changes existing all kinds of induction conductivities and Permanent Magnet and Electric
There are three-phase and the armature winding of the above on machine stator, it is necessary to the present situation of at least six electric and electronic power switching device, effectively
Device for power switching number is reduced, reduces the possibility that device for power switching in circuit for controlling motor breaks down, reliability
Improve.
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 single concentratred winding, including stator, mover and main air gap, its
In：
Even number stator tooth is evenly arranged with the stator, stator slot, stator slot yoke are provided with two neighboring stator tooth
Permanent magnet is provided between stator back yoke, main air gap, the permanent magnet production are provided between the mover tooth of the stator tooth and mover
Raw magnetic flux enters mover by main air gap and forms main flux；
The permanent magnet does not rotate 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 individual stator slot yoke portion is opposite；
A set of armature winding is laid in the stator slot, by controlling size of current and the direction of a set of armature winding,
Change magnetic field interaction caused by armature supply magnetic field and permanent magnet, produced and turned using magnetic resistance change rate between stator and mover
Square.A set of armature winding is only laid in stator slot, phase insulation is not needed in stator slot, groove utilization rate is high, winding inserting work
Skill is simple, and manufacturing cost is low.
The setting that permanent magnet does not rotate with mover so that it is easy for installation, be advantageous to radiate, eliminate common single-phase permanent electricity
Machine due to permanent magnet with mover rotate and caused mechanical stress damage and permanent magnet radiating it is bad the shortcomings of.
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 can be with identical, can also be 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 form 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 armature winding is simple concentratred winding, is penetrated from an armature slot, in outward direction along outside stator back yoke
Side passes, and forms a coil, armature winding surrounds stator slot yoke, permanent magnet and the winding of stator back yoke, when the stator iron of motor
When heart length is bigger, End winding length can be effectively reduced, reduces copper consumption, motor cost is reduced and reduces the copper of motor
Consumption, efficiency is improved, the armature winding of each armature slot forms 1 set of coil, and all coils can be with parallel with one another or series connection.
During motor operation, it is only necessary to control size of current and the direction of a set of armature winding, armature supply magnetic field and permanent magnetism
Magnetic field interaction caused by body causes the magnetic flux on stator tooth mutually to strengthen or offset, and stator field connects in a certain direction
It is continuous to open or turn off, produce torque using magnetic resistance change rate between stator and mover.
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 by changing the pole embrace of permanent magnet come really
Determine the magnetic energy product of permanent magnet, and existing magneto generally only uses high-performance because pole embrace is limited by number of poles
Permanent magnet could meet to design the close needs of magnetic.
The permanent magnet can be the permanent-magnet material such as neodymium iron boron of high energy product or be low magnetic energy product permanent magnetism material
Material such as ferrite or aluminium nickel cobalt are made.
The present invention operation principle be：
The stator core and mover core of motor formed using silicon steel plate stacking or the core material of high permeability once
It is made, when armature winding no power, magnetic flux caused by the permanent magnet passes through stator slot yoke, stator tooth and main air gap along inflow
Mover tooth, then the permanent magnet flowed out to by adjacent mover tooth under main air gap reaches another extremely, and closed by stator back yoke
Close, form the main flux of motor.When armature winding is powered, magnetic field caused by armature winding electric current causes electricity where armature winding
Different polarity is presented in the stator tooth of pivot groove both sides respectively, with permanent magnet caused by magnetic fields be superimposed so that a stator tooth
Polarity is shown, there is main flux magnetic flux process, another adjacent stator tooth does not have polarity, and no magnetic flux flows through, due to armature winding
Set every a groove, the stator tooth for therefore, in motor having half has polarity, and the stator tooth of half does not have polarity, according to magnetic
Minimum principle is hindered, will move to mover makes mover tooth with having the position that the stator tooth of polarity overlaps, because the mover number of teeth is
The half of the stator number of teeth, now just each mover tooth with stator tooth face, this position is pair of mover tooth and stator tooth
Neat position, the inductance of this position correspondence is maximum and magnetic resistance is minimum.Now, mover continues to move, and keeps electric current in armature winding
Direction it is constant, the power of its motion hindered and generator operation, is continued to be powered in inductance last transition, generated electricity by mover
Journey will be continued for, and after stator and mover align once again, change the direction of armature supply so that determined just now without polarity
Sub- tooth shows polarity, and the stator tooth of original polarized does not show polarity, and mover continues stress and generated electricity, and this process will always
Repeat, power generation process is continued for.
Beneficial effects of the present invention are：
(1) motor of the present invention only has a set of winding, only needs to control size of current and the side of a set of armature winding during operation
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 caused by armature winding and permanent magnet mutually strengthens or supported on the stator teeth during motor operation of the present invention
Disappear, during motor operation armature winding and Exciting Windings for Transverse Differential Protection complete period be powered simultaneously, 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 usage, reduce cost；
(3) motor permanent magnet of the present invention is fixed on stator, is not rotated with mover, easy for installation, is advantageous to radiate, and is eliminated
Common electric machine due to permanent magnet rotates with mover and caused mechanical stress is damaged, the permanent magnet bad grade that radiates lacks
Point；
(4) a set of winding is only laid in each stator slot of motor of the present invention, the winding is simple concentratred winding, from one
Individual armature slot penetrates, and is passed in 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 reduce motor cost and reduce the copper loss of motor, improve efficiency, the armature winding of each armature slot forms 1
Coil is covered, all coils can be with parallel with one another or series connection, and machine winding inserting-coil process is simple, need not be placed in groove alternate exhausted
Edge, be advantageous 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 because the cost of the permanent magnet of motor wider width is higher, machine
Easily ruptured during tool stress, more difficult during installation, 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 by number of poles, generally 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 permagnetic synchronous motor power converter circuit figure；
Fig. 3 is the structural representation of motor embodiment 1 of the present invention；
Fig. 4 is the structural representation of motor embodiment 2 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 electric generator of single concentratred winding, including stator, mover, main air gap, institute
Stating stator includes permanent magnet, stator yoke, stator tooth, stator slot and stator winding；Mover includes mover tooth and mover groove；It is described fixed
Sub- 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 stator
Permanent magnet is provided between back yoke, permanent magnet does not move with mover, easy for installation, is advantageous to radiate, and eliminates common permanent magnet generator
Machine due to permanent magnet with mover move and caused mechanical stress damage and permanent magnet radiating it is bad the shortcomings of, every piece of permanent magnet was 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
Can be with identical, can also be different, the magnetizing direction of the permanent magnet on the same stator slot yoke is identical, two neighboring stator slot
The magnetizing direction of permanent magnet in yoke portion is on the contrary, magnetic flux caused by the permanent magnet forms main magnetic by main air gap into mover
It is logical；The stator slot is groove (armature slot) where armature winding, lays a set of armature winding in armature slot, during motor operation,
Only need to control size of current and the direction of a set of armature winding, magnetic field interaction caused by armature supply magnetic field and permanent magnet
So that the magnetic flux on stator tooth mutually strengthens or offset, stator field is continuously opened or turned off in a certain direction, is utilized
Magnetic resistance change rate produces torque and generated electricity between stator and mover；Main air gap is provided between stator tooth and mover tooth.
The number ns of motor stator tooth meets：ns=2*n, wherein n are greater than the natural number equal to 1.
The number nr of electric mover tooth and the number ns of motor stator tooth meet：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 needed in stator slot, groove utilization rate is high, under winding
Wiring technology is simple, and manufacturing cost is low.
Motor stator tooth, stator slot yoke, stator back yoke and mover tooth form 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=0.5*ns。
Armature winding is simple concentratred winding, is penetrated from an armature slot, is worn in outward direction along on the outside of stator back yoke
Go out, form a coil, armature winding surrounds stator slot yoke, permanent magnet and the winding of stator back yoke, when the stator core of motor is grown
When spending bigger, End winding length can be effectively reduced, reduces copper consumption, motor cost is reduced and reduces the copper loss of motor,
Efficiency is improved, the armature winding of each armature slot forms 1 set of coil, and all coils can be with parallel with one another or series connection.
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 is determined according to the design air gap flux density of motor, then determined forever by changing the pole embrace of permanent magnet
The magnetic energy product of magnet, and existing magneto generally only uses high-performance permanent magnet because pole embrace is limited by number of poles
Body could meet to design the close needs of magnetic.
The permanent magnet can be the permanent-magnet material such as neodymium iron boron of high energy product or be low magnetic energy product permanent magnetism material
Material such as ferrite or aluminium nickel cobalt are made.
As shown in figure 1, machine winding of the present invention is simple concentratred winding, penetrated from an armature slot, to the outer direction
Being passed on the outside of along stator back yoke, form a coil, armature winding surrounds stator slot yoke, permanent magnet and the winding of stator back yoke, when
When the path length of motor is bigger, End winding length can be effectively reduced, reduces copper consumption, motor cost is reduced and reduces motor
Copper loss, improve efficiency, the armature winding of each armature slot forms 1 set of coil, shares 4 sets of coils, 4 sets of coils can mutually simultaneously
Connection or series connection, only have a set of armature winding A indirect current streams during motor operation of the present invention, 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 construction.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：
As shown in figure 3, the motor stator number of teeth is 8, the mover number of teeth is 4, and permanent magnet block number is 4, and present embodiment includes fixed
Son, mover and 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 up of high permeability ferromagnetic material, and stator core is provided with stator slot, and stator slot is armature
Groove 4, armature winding 5 is laid in armature slot 4, the armature winding 5 is simple concentratred winding, is penetrated from an armature slot 4,
Passed in outward direction along the outside of stator back yoke 2, form a coil, armature winding surround stator slot yoke 3, permanent magnet 6 and calmly
Sub- back yoke 2 is wound, and winding construction is simple and simplifies inserting-coil process, can effectively reduce End winding length, reduces copper consumption,
Reduce motor cost and reduce the copper loss of motor, improve efficiency, the armature winding of each armature slot forms 1 set of coil, shares 4 sets
Coil, 4 sets of coils can be with parallel with one another or series connection；Permanent magnet 6, permanent magnet are laid between stator slot yoke 3 and stator back yoke 2
Using the ferrite permanent magnet material of low magnetic energy product, the magnetizing direction of adjacent two pieces of permanent magnets is opposite；Mover includes the He of mover tooth 7
Mover groove 8, main air gap 9 is provided between mover tooth 7 and 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 up of high permeability ferromagnetic material, and stator core is provided with stator slot, and stator slot is armature
Groove 4, armature winding 5 is laid in armature slot 4, the armature winding 5 is simple concentratred winding, is penetrated from an armature slot,
Passed in outward direction along the outside of stator back yoke 2, form a coil, armature winding 5 surround stator slot yoke 3, permanent magnet 6 and calmly
Sub- back yoke 2 is wound, and winding construction is simple and simplifies inserting-coil process, can effectively reduce End winding length, reduces copper consumption,
Reduce motor cost and reduce the copper loss of motor, improve efficiency, the armature winding of each armature slot forms 1 set of coil, shares 4 sets
Coil, 4 sets of coils can be with parallel with one another or series connection；Permanent magnet 6, Mei Geding is laid between stator slot yoke 3 and stator back yoke 2
Have 3 pieces of permanent magnets on pilot trench yoke, permanent magnet 6 using high energy product Nd-Fe-B permanent magnet material, 3 pieces on same stator slot yoke
The magnetizing direction of permanent magnet is identical, and the magnetizing direction of the permanent magnet on adjacent different stator slot yokes is opposite；Mover includes mover
Tooth 7 and mover groove 8；1 is provided with main air gap 9 between mover tooth 7 and stator tooth.
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, 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 the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. a kind of low cost high powered density permanent magnetic linear electric generator of single concentratred winding, it is characterized in that：Including stator, mover and master
Air gap, wherein：
Even number stator tooth is evenly arranged with the stator, stator slot is provided with two neighboring stator tooth, stator slot yoke is with determining
Permanent magnet is provided between sub- back yoke, is provided with main air gap between the mover tooth of the stator tooth and mover, caused by the permanent magnet
Magnetic flux enters mover by main air gap and forms main flux；
The permanent magnet does not rotate with mover, and the magnetizing direction of the permanent magnet on same stator slot yoke is identical, two neighboring fixed
The magnetizing direction of permanent magnet in pilot trench yoke portion is opposite；
A set of armature winding is laid in the stator slot, by controlling size of current and the direction of a set of armature winding, makes electricity
Magnetic field interaction caused by pivot current field and permanent magnet changes, and power is produced using magnetic resistance change rate between stator and mover；
During armature winding no power, it is dynamic along flowing into that magnetic flux caused by the permanent magnet passes through stator slot yoke, stator tooth and main air gap
Sub- tooth, then the permanent magnet flowed out to by adjacent mover tooth under main air gap reaches another extremely, and closed by stator back yoke,
Form the main flux of motor；
Magnetic field caused by armature winding and permanent magnet mutually increases on the stator teeth during the operation of single concentratred winding permanent magnet linear generator
Strong or counteracting, armature winding complete period are powered simultaneously.
2. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, it is characterized in that：
Every piece of permanent magnet is magnetized by a monoblock permanent magnet to be formed or is spliced by the permanent magnet of polylith narrower width.
3. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, it is characterized in that：
The width of the permanent magnet is identical or different.
4. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, it is characterized in that：
The number of the stator tooth is the even number more than or equal to 2.
5. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, it is characterized in that：
The number of the mover tooth is more than or equal to the 1/2 of stator tooth number.
6. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, it is characterized in that：
The block number of the permanent magnet is m times of mover tooth, and m is the natural number more than or equal to 1.
7. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, it is characterized in that：
The stator tooth, stator slot yoke, stator back yoke and mover tooth form by silicon steel plate stacking or by high magnetic permeability core materials
It is made.
8. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, it is characterized in that：
Described two adjacent stator tooths are connected by stator slot yoke, each two stator tooth and between stator slot yoke formed one piece of entirety
Iron core, the interior integrated iron core block number of motor is the 1/2 of stator tooth number.
9. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, it is characterized in that：
The armature winding is concentratred winding, is penetrated from an armature slot, is passed in outward direction along on the outside of stator back yoke, forms one
Coil, armature winding form 1 set of line around stator slot yoke, permanent magnet and the winding of stator back yoke, the armature winding of each armature slot
Circle, all coils are parallel with one another or connect.
10. a kind of single low cost high powered density permanent magnetic linear electric generator of concentratred winding as claimed in claim 1, its feature
It is：The residual flux density of permanent magnet is determined according to the design air gap flux density of motor, permanent magnet is determined by changing pole embrace
Magnetic energy product, the width of the permanent magnet of the motor is determined according to the magnetic energy product of permanent magnet or residual flux density.
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| JP2002209347A (en) * | 2001-01-12 | 2002-07-26 | Nissan Motor Co Ltd | Motor |
| CN1925260A (en) * | 2005-08-30 | 2007-03-07 | 乐金电子(天津)电器有限公司 | Stator for annular generator |
| CN201956761U (en) * | 2010-07-08 | 2011-08-31 | 东南大学 | Linear cylinder type switched flux permanent magnet 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 |
| CN205081584U (en) * | 2015-10-22 | 2016-03-09 | 山东大学 | Low -cost high power density permanent magnet linear generator of single concentrated winding |
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