CN205081651U - Low -cost high power density permanent magnet motor of simplex winding - Google Patents

Low -cost high power density permanent magnet motor of simplex winding Download PDF

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Publication number
CN205081651U
CN205081651U CN201520828365.3U CN201520828365U CN205081651U CN 205081651 U CN205081651 U CN 205081651U CN 201520828365 U CN201520828365 U CN 201520828365U CN 205081651 U CN205081651 U CN 205081651U
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stator
permanent magnet
rotor
tooth
motor
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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 utility model discloses a low -cost high power density permanent magnet motor of simplex winding, characterized by, including stator and rotor, the stator includes and is equipped with the permanent magnet between stator yoke and every the stator slot yoke by the stator yoke of compriseing stator yoke and a plurality of stator slot yoke, and the both ends of every stator slot yoke are provided with the stator tooth respectively, are the armature alot between the stator tooth, one set of armature winding has been laid in the armature alot, the rotor includes and is equipped with the rotor groove between two adjacent rotor teeth by a plurality of rotor teeth, is equipped with main air gap between every rotor tooth and the stator tooth, the utility model discloses electric motor manufacture simple process, it is with low costs.

Description

The low cost high powered density permanent magnetic motor of a kind of simplex winding
Technical field
The utility model relates to a kind of permanent magnet motor, particularly relates to the low cost high powered density permanent magnetic motor of a kind of simplex winding.
Background technology
In recent years, along with the raising of permanent magnetic material resistance to elevated temperatures and the reduction of price, magneto obtains applying more widely in national defence, industrial and agricultural production and daily life etc., forward high-power, high performance and microminiaturized future development.The power of current magneto is from a few milliwatt to a few megawatt, and the large-scale magneto that range of application is drawn from toy motor, commercial Application to naval vessel, is widely applied in national economy, daily life, war industry, aerospace various aspects.Main application is as follows:
(1) household appliance technical field: comprise TV audio and video equipment, fan, air conditioner, food processor, cosmetic tool, lampblack absorber etc.
(2) computer and ancillary equipment field thereof: comprise computer (driver, fan etc.), printer, plotter, CD-ROM drive, CD writer etc.
(3) field of industrial production: comprise industrial drives device, material processing system, automation equipment, robot etc.
(4) automotive field: comprise permanent magnet starting motor, wiper motor, door-lock motor, seat lifting motor, sunshading ceiling motor, scavenging pump motor, recorder motor, glass lifting motor, radiator cooling fan motor, air conditioner motor, antenna lifting motor, Oil pump electrical machinery etc.
(5) public life field: comprise clock and watch, beauty treatment machinery, automatic vending machine, ATM, paper money counter etc.
(6) communications and transportation: comprise electric car, aircraft auxiliary equipment, naval vessel etc.
(7) space flight: comprise rocket, satellite, spaceship, space shuttle etc.
(8) national defence: comprise tank, guided missile, submarine, aircraft etc.
(9) medical treatment: comprise dental drill, artificial heart, medicine equipment etc.
(10) generate electricity: comprise wind power generation, cogeneration, miniature hydro-power generation, small-sized internal combustion generating set generator, and the pilot exciter etc. of high-rating generator.
Regular alternating current magneto is divided into following a few class usually: asynchronous starting permanent magnet synchronous motor, brushless, permanently excited direct current motor, speed governing permanent magnet synchronous motor.
Brshless DC motor, with substantially identical on speed governing permanent magnetic synchronous motor structure, stator be polyphase windings, rotor has permanent magnet, and their main distinction is that brshless DC motor realizes motor synchronizing according to rotor position information.Their advantage is: (1) eliminates brush-commutated device, and reliability improves; (2) loss produces primarily of stator, and radiating condition is good; (3) volume is little, lightweight.
Difference on asynchronous starting permanent magnet synchronous motor and speed governing permanent magnet synchronous motor structure is: the former rotor has the integral core of starting winding or having priming, can realize self-starting, can be incorporated into the power networks without the need to control system.
In addition, also have electric machine, electric machine needs supporting capacitor start and operation, and volume is heavy, and cost is high, and the efficiency of overall operation and power factor all lower.
Existing magneto winding Problems existing is mainly:
1, existing magneto winding is generally 3 phases, and stator slot number is many, winding inserting complex process, and manufacturing cost is high; Existing most of permanent magnet of permanent magnet motor is positioned on rotor, rotate with rotor during operation, permanent magnet need adopt special procedure to fix, manufacturing cost is high, especially, when motor speed is higher, permanent magnet is fixing more difficult, because permanent magnet is positioned on rotor, heat radiation difficulty during operation, temperature rise and the vibration caused due to rotor turns can cause permanent magnet mechanical structure to be damaged and irreversible demagnetization occurs.
2, existing magneto is generally three-phase; require that the power inversion circuit of motor at least needs 6 device for power switching; as IGBT or MOSFET etc.; and the drive circuit of corresponding this device for power switching of driving and protective circuit; make power of motor inverter circuit cost quite high, even reach two to three times of motor body cost, quantity of power switches increases and adds control circuit complexity; the possibility of device failure increases, and the reliability of runtime system reduces.
3, existing magneto is that permanent magnet is directly in the face of air gap mostly, need the permanent magnet adopting radial magnetizing, because when adopting parallel magnetization, motor every pole magnetic flux can significantly reduce, reduce exerting oneself and power density of motor, but radial magnetizing permanent magnetism body cost is high, the permanent magnet obtaining uniform radial magnetizing is very difficult.
4, when existing magneto manufactures, iron core consumption is large, and motor quality is large, and when motor runs, stock utilization is low.
Therefore, it is few to seek a kind of winding number of phases, and iron core consumption is few, and motor body manufacturing process is simple, and permanent magnet is positioned on stator, easy for installation, and cost is low, and power circuit switching device number is few, controller and the low magneto of power circuit cost most important.
Utility model content
For solving the deficiency that prior art exists, the utility model discloses the low cost high powered density permanent magnetic motor of a kind of simplex winding, the utility model has following characteristics:
1, the utility model motor is magneto, stator only has a set of stator armature winding A, and only lay a set of armature winding in each groove of motor, phase insulation is not needed in groove, motor winding inserting operation is simple, whole cost is lower than existing all kinds of three-phase induction motor and magneto, and owing to not needing phase insulation in groove, copper factor is high.
2, the utility model motor permanent magnet is fixed on stator, not with rotor turns, easy for installation, is conducive to heat radiation, eliminates the mechanical stress damage that common magneto produces because permanent magnet rotates with rotor, the shortcomings such as permanent magnet heat radiation is bad.
3, the power density of the utility model motor is high, and stock utilization is high, the motor of same design power, and material usage saved by the utility model motor, reduces costs.
4, a set of armature winding A indirect current stream is only had when the utility model motor runs, therefore the control circuit of motor only needs two electric and electronic power switching devices, as IGBT or MOSFET, as shown in Figure 1, existing all kinds of induction motor and permanent magnet motor stator all there are three-phase and above armature winding, need at least 6 electric and electronic power switching devices, as shown in Figure 2, therefore, needed for the control system of the utility model motor, switching device is few, cost is low, and structure is simple.In addition, because device for power switching number is few, reduce the possibility that device for power switching in circuit for controlling motor breaks down, reliability improves.
5, the permanent magnet of the utility model motor is selected flexibly, both the permanent magnet of high energy product can have been selected, also the permanent magnet of the low magnetic energy products such as ferrite can be selected, because can by the residual flux density of the design air gap flux density determination permanent magnet of motor, pole embrace again by changing permanent magnet determines the magnetic energy product of permanent magnet, and existing magneto is subject to the restriction of number of poles due to pole embrace, usually only has and adopt high-performance permanent magnet could meet the close needs of design magnetic.
For achieving the above object, concrete scheme of the present utility model is as follows:
The low cost high powered density permanent magnetic motor of a kind of simplex winding, comprise stator and rotor, described stator comprises the stator yoke be made up of stator back yoke and multiple stator slot yoke, permanent magnet is provided with between stator back yoke and each stator slot yoke, the two ends of each stator slot yoke are respectively arranged with stator tooth, be armature slot between stator tooth, in described armature slot, lay a set of armature winding;
Described rotor comprises multiple rotor tooth, is provided with rotor, is provided with main air gap between each rotor tooth and stator tooth between adjacent two rotor tooths;
When motor runs, control size of current and the direction of a set of armature winding, the magnetic field interaction that armature supply magnetic field and permanent magnet produce makes the magnetic flux on stator tooth mutually strengthen or offset, stator field is opened continuously in a certain direction or is turned off, and utilizes magnetic resistance change rate between stators and rotators to produce torque.
Further, described armature winding penetrates from an armature winding place armature slot, pass from adjacent armature slot, winding in adjacent two armature slots forms an armature coil, each armature coil is across two stator tooth distances, in adjacent two armature slots, the size of current of winding is identical, and direction is contrary.
Further, when armature winding no power, the magnetic flux that described permanent magnet produces through stator slot yoke, stator tooth and main air gap along motor radial inflow rotor tooth, permanent magnet again under adjacent rotor tooth flows out to main air gap arrival another stator slot yoke adjacent, close through stator back yoke again, form the main flux of motor.
The number n of described motor stator tooth smeet: n s=2*n, wherein n be more than or equal to 2 natural number.
The number n of described rotor tooth rwith the number n of motor stator tooth smeet: nr=n s/ 2.
The block number n of described permanent magnet pmwith the number n of motor stator tooth smeet: n pm/ m=0.5*n s, m be more than or equal to 1 natural number.
Further, when armature winding is energized, the magnetic field that armature winding electric current produces makes the stator tooth of armature slot both sides, armature winding place present different polarity respectively, the magnetic fields produced with permanent magnet superposes, make a stator tooth display polarity, main flux magnetic flux is had to pass through, another adjacent stator tooth does not have polarity, flow through without magnetic flux, the stator tooth of half is had to have polarity in motor, the stator tooth of half does not have polarity, according to magnetic resistance minimum principle, rotate to making rotor and rotor tooth is overlapped with the stator tooth with polarity, due to the half that the rotor number of teeth is the stator number of teeth, now each rotor tooth is all just right with stator tooth, this position is the aligned position of rotor tooth and stator tooth, magnetic resistance corresponding to this position is minimum.
Further, if rotor continues to rotate, sense of current in armature winding need be changed, make the stator tooth display polarity without polarity, and originally had the stator tooth of polarity not show polarity, at this moment, according to magnetic resistance minimum principle, rotor tooth rotates to having and present four trend having polarity stator tooth to align, thus rotor is by stressed rotation, after rotor tooth overlaps again with stator, continues to change armature winding sense of current, this process will repeat always, and rotor will continue to rotate.
Further, described permanent magnet is parallel magnetization or radial magnetizing, and every block permanent magnet both can have been magnetized by a monoblock permanent magnet and form, and also can be spliced by the permanent magnet that polylith width is narrower, the polar arc width of described permanent magnet can be identical, also can be different.
Further, the magnetizing direction of the permanent magnet on described same stator slot yoke is identical, and the magnetizing direction of the permanent magnet in adjacent two stator slot yoke portions is contrary; The magnetic flux that described adjacent two pieces of permanent magnets produce enters rotor through main air gap and forms main flux.
Further, two adjacent stator tooths are connected by stator slot yoke, every two stator tooths and between stator slot yoke form one piece of integrated iron core, this integrated iron core block number n in motor cmeet n c=n r, n rfor the number of rotor tooth.
Further, the polar arc width of the permanent magnet of described motor can be determined according to the magnetic energy product of permanent magnet or residual flux density, according to the residual flux density of the air gap flux density determination permanent magnet of motor, then determined the magnetic energy product of permanent magnet by the pole embrace changing permanent magnet.And existing magneto is subject to the restriction of number of poles due to pole embrace, usually only has and adopt high-performance permanent magnet could meet the close needs of design magnetic.
Wherein, the residual flux density of permanent magnet and the width of permanent magnet are directly proportional, and therefore adopt the permanent magnet of high energy product or high residual flux density significantly can reduce the width of permanent magnet, reduce the consumption of permanent magnet.In fact magnetic energy product is permanent magnet residual magnetism density and coercitive product, but more pays close attention to residual flux density for those skilled in the art, and therefore high energy product generally just represents high residual flux density.
Described permanent magnet and stator back yoke iron core and the equal close contact of stator slot yoke core.
Only lay a set of armature winding in described stator slot, do not need phase insulation in stator slot, groove utilance is high, and winding inserting technique is simple, low cost of manufacture.
Described motor stator tooth, stator slot yoke, stator back yoke and rotor tooth form by silicon steel plate stacking or are made up of high magnetic permeability core material.
Stator slot yoke is positioned at bottom stator slot near excircle direction, permanent magnet is provided with between stator slot yoke and stator back yoke, permanent magnet is not with rotor turns, easy for installation, be conducive to heat radiation, eliminate mechanical stress that common electric machine produces because permanent magnet rotates with rotor to damage and permanent magnet dispels the heat the shortcoming such as bad
Described permanent magnet both can be that permanent magnetic material such as ferrite or the aluminium nickel cobalt of permanent magnetic material if neodymium iron boron also can be low magnetic energy product of high energy product is made.
Described rotor is symmetrical field spider, notch cuttype rotor or turbine-like rotor.
The utility model motor specifically carrys out work like this, the stator core of the utility model motor and rotor core adopt silicon steel plate stacking to form or the core material of high permeability is once made, when armature winding no power, the magnetic flux that described permanent magnet produces is through stator slot yoke, stator tooth and main air gap are along motor radial inflow rotor tooth, again through adjacent rotor tooth flow out to main air gap arrive another extremely under permanent magnet, then to close through stator back yoke, form the main flux of motor.When armature winding is energized, the magnetic field that armature winding electric current produces makes the stator tooth of armature slot both sides, armature winding place present different polarity respectively, the magnetic fields produced with permanent magnet superposes, make a stator tooth display polarity, main flux magnetic flux is had to pass through, another adjacent stator tooth does not have polarity, flow through without magnetic flux, because armature winding is arranged every a groove, therefore, the stator tooth of half is had to have polarity in motor, the stator tooth of half does not have polarity, according to magnetic resistance minimum principle, rotate to making rotor and rotor tooth is overlapped with the stator tooth with polarity, due to the half that the rotor number of teeth is the stator number of teeth, now just in time each rotor tooth is all just right with stator tooth, this position is the aligned position of rotor tooth and stator tooth, magnetic resistance corresponding to this position is minimum.Now, want rotor and continue to rotate, sense of current in armature winding need be changed, make the stator tooth display polarity just now without polarity, and originally had the stator tooth of polarity not show polarity, at this moment, according to magnetic resistance minimum principle, rotor tooth rotates to having and present four trend having polarity stator tooth to align, thus rotor is by stressed rotation, after rotor tooth overlaps again with stator, continues to change armature winding sense of current, this process will repeat always, and rotor will continue to rotate.
The beneficial effects of the utility model:
1, the utility model motor only has a set of winding, winding construction is simple, simplify inserting-coil process, reduce manufacturing cost, only need the size of current and the direction that control a set of armature winding during operation, power circuit only needs two device for power switching, and common three phase electric machine needs at least 6 device for power switching, electric machine controller power demand switching device number is few, and cost is low.
The magnetic field that when 2 the utility model motors run, armature winding and permanent magnet produce mutually strengthens on the stator teeth or offsets, when motor runs, armature winding and excitation winding complete period are energized simultaneously, therefore, the power density of the utility model motor is high, stock utilization is high, the motor of same design power, material usage saved by the utility model motor, reduces costs.
3, the utility model motor permanent magnet is fixed on stator, not with rotor turns, easy for installation, is conducive to heat radiation, eliminates the mechanical stress damage that common magneto produces because permanent magnet rotates with rotor, the shortcomings such as permanent magnet heat radiation is bad.
4, only lay a set of winding in each stator slot of the utility model motor, motor winding inserting technique is simple, does not need to place phase insulation in groove, is conducive to improving copper factor and groove utilance; Torque dead-band can be eliminated by the rotor structure changing the utility model motor, improve the starting performance of motor, such as can adopt asymmetric rotor, turbine-like rotor or stepped rotor etc.
5, the cost due to the permanent magnet of motor polar arc wider width is higher, easily break time mechanically stressed, comparatively difficult during installation, the situation that the permanent magnet that mechanical strength is less not as good as polylith polar arc width is spliced, and the permanent magnet in the utility model motor can be the permanent magnet that one piece of entirety magnetizes, also can be spliced by polylith permanent magnet, therefore the utility model motor manufacturing technology is simple, and cost is low.
6, because the polar arc width of the permanent magnet of the utility model motor can be determined flexibly according to the design magnetic energy product of permanent magnet or design residual flux density, so the utility model motor both can adopt the permanent magnet of high energy product also can adopt the permanent magnet of low magnetic energy product, high energy product permanent magnet and low magnetic energy product permanent magnet mix and match can also be adopted, can according to the residual flux density of the design air gap flux density determination permanent magnet of motor in actual design, the magnetic energy product of required permanent magnet is determined again by the pole embrace of permanent magnet, and existing magneto is subject to the restriction of number of poles due to pole embrace, usually the needs adopting high-performance permanent magnet could meet high performance motor are only had.
7, because the utility model motor permanent magnet is not directly towards air gap, permanent magnet both can be radial magnetizing also can be parallel magnetization, the mode that magnetizes is different little on the impact of motor performance, and for other surface-mounted permanent magnet machines, during employing parallel magnetization, magnetic flux reduces, the energy index of meeting appreciable impact motor, and it is comparatively difficult to obtain uniform radial magnetizing permanent magnetism body, processing cost is high.
Accompanying drawing explanation
The power converter circuit figure of Fig. 1 the utility model motor;
The existing brushless direct current permanent magnetic of Fig. 2 and permagnetic synchronous motor power converter circuit figure;
Fig. 3 is the utility model motor embodiment 1 structural representation;
Fig. 4 is the utility model motor embodiment 2 structural representation;
Wherein, 1. stator tooth, 2. stator back yoke, 3. stator slot yoke, 4. armature slot, 5. armature winding, 6. permanent magnet, 7. rotor tooth, 8. rotor, 9. main air gap.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described in detail:
Embodiment 1 as shown in Figure 3, the present embodiment motor stator number of teeth is 8, the rotor number of teeth is 4, permanent magnet blocks number is 4, present embodiment comprises stator, rotor and main air gap, stator comprises stator core, permanent magnet and stator slot, stator core comprises stator tooth 1, stator back yoke 2 and stator slot yoke 3, stator core is made up of high permeability ferromagnetic material, stator core is provided with stator slot, stator slot is armature slot 4, armature winding 5 is laid in armature slot 4, armature winding 5 penetrates from an armature slot, pass from another adjacent armature slot, form a coil, make the size of current in every adjacent two armature slots identical, direction is contrary, lay arc-shaped permanent magnet 6 between stator slot yoke 3 and stator back yoke 2, permanent magnet 6 adopts the ferrite permanent magnet material of low magnetic energy product, and permanent magnet 6 takes parallel magnetization, and the magnetizing direction of adjacent two pieces of permanent magnets is contrary, rotor comprises rotor tooth 7 and rotor 8, and rotor tooth 7 is circumferentially symmetrical, is provided with main air gap 9 between rotor tooth 7 and stator tooth 1.
The magnetic flux that adjacent two pieces of permanent magnets produce enters rotor through main air gap and forms main flux, the polarity of two stator tooths corresponding under same permanent magnet is identical, the polarity of two stator tooths that other one piece of permanent magnet adjacent is with it corresponding then in contrast, and the magnetic field that armature winding electric current produces makes the magnetic direction on two adjacent stator tooths of these armature slot both sides, winding place contrary, increasing magnetic action is risen to a stator tooth, demagnetizing effect is risen to another stator tooth, therefore, armature winding current field and the mutual acting in conjunction of magnetic field of permanent magnet make the magnetic field of same permanent magnet corresponding two stator tooths mutually to strengthen or to offset, by controlling size of current and the direction of armature winding, turning on and off of the direction in magnetic field on stator tooth can be controlled, when the magnetic field on this stator tooth strengthens " open-minded " mutually, according to magnetic resistance minimum principle, this stator tooth has the trend attracting rotor tooth to align with it, therefore torque is produced, when this stator tooth aligns mutually with rotor tooth, after reaching the minimum position of magnetic resistance, change armature winding sense of current, magnetic field on this stator tooth is weakened " shutoff " mutually, now this stator tooth and rotor tooth sucking action disappear, but the magnetic field of stator tooth adjacent with it strengthens " open-minded " mutually, continue to attract rotor tooth, rotor is rotated continuously.
Embodiment 2 as shown in Figure 4, the present embodiment motor stator number of teeth is 8, the rotor number of teeth is 4, permanent magnet blocks number is 12, present embodiment comprises stator, rotor, main air gap, stator comprises stator core, permanent magnet and stator slot, stator core comprises stator tooth 1, stator back yoke 2 and stator slot yoke 3, stator core is made up of high permeability ferromagnetic material, stator core is provided with stator slot, stator slot is armature slot 4, armature winding 5 is laid in armature slot 4, armature winding 5 penetrates from an armature slot, pass from another adjacent armature slot, form a coil, make the size of current in every adjacent two armature slots identical, direction is contrary, arc-shaped permanent magnet 6 is laid between stator slot yoke 3 and stator back yoke 2, each stator slot yoke 3 there are 3 pieces of permanent magnets, permanent magnet 6 adopts the Nd-Fe-B permanent magnet material of high energy product, permanent magnet 6 takes radial magnetizing, the magnetizing direction of 3 pieces of permanent magnets on same stator slot yoke is identical, and the magnetizing direction of the permanent magnet on adjacent different stator slot yokes is contrary, rotor comprises rotor tooth 7 and rotor 8, and rotor is turbine shape, and when rotor tooth 7 aligns with stator tooth 1, this rotor tooth is different from the magnetic resistance of adjacent two stator tooths, is conducive to eliminating torque dead-band, improves motor starting performance, main air gap 9 is provided with between rotor tooth 7 and stator tooth 1.
The magnetic flux that adjacent two pieces of permanent magnets produce enters rotor through main air gap and forms main flux, the polarity of two stator tooths corresponding under same permanent magnet is identical, the polarity of two stator tooths that other one piece of permanent magnet adjacent is with it corresponding then in contrast, and the magnetic field that armature winding electric current produces makes the magnetic direction on two adjacent stator tooths of these armature slot both sides, winding place contrary, increasing magnetic action is risen to a stator tooth, demagnetizing effect is risen to another stator tooth, therefore, armature winding current field and the mutual acting in conjunction of magnetic field of permanent magnet make the magnetic field of same permanent magnet corresponding two stator tooths mutually to strengthen or to offset, by controlling size of current and the direction of armature winding, turning on and off of the direction in magnetic field on stator tooth can be controlled, when the magnetic field on this stator tooth strengthens " open-minded " mutually, according to magnetic resistance minimum principle, this stator tooth has the trend attracting rotor tooth to align with it, therefore torque is produced, when this stator tooth aligns mutually with rotor tooth, after reaching the minimum position of magnetic resistance, change armature winding sense of current, magnetic field on this stator tooth is weakened " shutoff " mutually, now this stator tooth and rotor tooth sucking action disappear, but the magnetic field of stator tooth adjacent with it strengthens " open-minded " mutually, continue to attract rotor tooth, rotor is rotated continuously.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection range; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection range of the present utility model.

Claims (10)

1. the low cost high powered density permanent magnetic motor of simplex winding, it is characterized in that, comprise stator and rotor, described stator comprises the stator yoke be made up of stator back yoke and multiple stator slot yoke, permanent magnet is provided with between stator back yoke and each stator slot yoke, the two ends of each stator slot yoke are respectively arranged with stator tooth, be armature slot, lay a set of armature winding in described armature slot between stator tooth;
Described rotor comprises multiple rotor tooth, is provided with rotor, is provided with main air gap between each rotor tooth and stator tooth between adjacent two rotor tooths;
When motor runs, control size of current and the direction of a set of armature winding, the magnetic field interaction that armature supply magnetic field and permanent magnet produce makes the magnetic flux on stator tooth mutually strengthen or offset, stator field is opened continuously in a certain direction or is turned off, and utilizes magnetic resistance change rate between stators and rotators to produce torque.
2. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 1, it is characterized in that, described armature winding penetrates from an armature winding place armature slot, pass from adjacent armature slot, winding in adjacent two armature slots forms an armature coil, each armature coil is across two stator tooth distances, and in adjacent two armature slots, the size of current of winding is identical, and direction is contrary.
3. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 1, it is characterized in that, when armature winding no power, the magnetic flux that described permanent magnet produces through stator slot yoke, stator tooth and main air gap along motor radial inflow rotor tooth, permanent magnet again under adjacent rotor tooth flows out to main air gap arrival another stator slot yoke adjacent, close through stator back yoke again, form the main flux of motor.
4. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 1, is characterized in that, the number n of described motor stator tooth smeet: n s=2*n, wherein n be more than or equal to 2 natural number;
The number n of described rotor tooth rwith the number n of motor stator tooth smeet: nr=n s/ 2;
The block number n of described permanent magnet pmwith the number n of motor stator tooth smeet: n pm/ m=0.5*n s, m be more than or equal to 1 natural number.
5. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 4, it is characterized in that, when armature winding is energized, the magnetic field that armature winding electric current produces makes the stator tooth of armature slot both sides, armature winding place present different polarity respectively, the magnetic fields produced with permanent magnet superposes, make a stator tooth display polarity, main flux magnetic flux is had to pass through, another adjacent stator tooth does not have polarity, flow through without magnetic flux, the stator tooth of half is had to have polarity in motor, the stator tooth of half does not have polarity, according to magnetic resistance minimum principle, rotate to making rotor and rotor tooth is overlapped with the stator tooth with polarity, due to the half that the rotor number of teeth is the stator number of teeth, now each rotor tooth is all just right with stator tooth, this position is the aligned position of rotor tooth and stator tooth, magnetic resistance corresponding to this position is minimum.
6. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 5, it is characterized in that, if rotor continues to rotate, sense of current in armature winding need be changed, make the stator tooth display polarity without polarity, and originally had the stator tooth of polarity not show polarity, at this moment, according to magnetic resistance minimum principle, rotor tooth rotates to having and present four trend having polarity stator tooth to align, thus rotor is by stressed rotation, after rotor tooth overlaps again with stator, continue to change armature winding sense of current, this process will repeat always, rotor will continue to rotate.
7. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 1, it is characterized in that, described permanent magnet is parallel magnetization or radial magnetizing, every block permanent magnet both can have been magnetized by a monoblock permanent magnet and form, also can be spliced by the permanent magnet that polylith width is narrower, the polar arc width of described permanent magnet can be identical, also can be different.
8. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 1, is characterized in that, the magnetizing direction of the permanent magnet on same stator slot yoke is identical, and the magnetizing direction of the permanent magnet in adjacent two stator slot yoke portions is contrary; The magnetic flux that adjacent two pieces of permanent magnets produce enters rotor through main air gap and forms main flux.
9. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 1, it is characterized in that, two adjacent stator tooths are connected by stator slot yoke, every two stator tooths and between stator slot yoke form one piece of integrated iron core, this integrated iron core block number n in motor cmeet n c=n r, n rfor the number of rotor tooth.
10. the low cost high powered density permanent magnetic motor of a kind of simplex winding as claimed in claim 1, it is characterized in that, the polar arc width of the permanent magnet of described motor can be determined according to the magnetic energy product of permanent magnet or residual flux density, according to the residual flux density of the air gap flux density determination permanent magnet of motor, then determined the magnetic energy product of permanent magnet by the pole embrace changing permanent magnet.
CN201520828365.3U 2015-10-22 2015-10-22 Low -cost high power density permanent magnet motor of simplex winding Active CN205081651U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105207435A (en) * 2015-10-22 2015-12-30 山东大学 Single-winding low-cost high-power-density permanent magnet motor
CN106685168A (en) * 2016-12-20 2017-05-17 华中科技大学 Stator permanent-magnet hybrid magnetic path dynamic iron core type linear oscillation motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105207435A (en) * 2015-10-22 2015-12-30 山东大学 Single-winding low-cost high-power-density permanent magnet motor
CN105207435B (en) * 2015-10-22 2018-03-23 山东大学 A kind of low cost high powered density permanent magnetic motor of simplex winding
CN106685168A (en) * 2016-12-20 2017-05-17 华中科技大学 Stator permanent-magnet hybrid magnetic path dynamic iron core type linear oscillation motor
CN106685168B (en) * 2016-12-20 2019-09-27 华中科技大学 A kind of stator permanent magnetic type mixed magnetic circuit dynamic iron core formula linear vibration motor

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