CN101834474A - Multitooth magnetic bridge type hybrid excitation magnetic flux switching motor - Google Patents
Multitooth magnetic bridge type hybrid excitation magnetic flux switching motor Download PDFInfo
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Abstract
The invention discloses a multitooth magnetic bridge type hybrid excitation magnetic flux switching motor. Permanent magnets, an armature winding and a single-phase excitation winding are installed on a stator; the tooth number of the stator is four times of the number of the permanent magnets; and part of a rotor part is a salient pole, and a rotor has no winding or permanent magnets and has simple and firm structure. An air gap magnetic field comprises an electric excitation magnetic field generated by the excitation winding and a magnetic field generated by the permanent magnets and is adjusted by changing the magnitude and the direction of excitation current, thereby improving the rotating speed operating range and the magnetic weakening capability of the motor. An electric excitation magnetic force line is connected with a magnetic bridge for closing after penetrating through an iron core at the top of the permanent magnets, which is beneficial to reducing the electric excitation ampere turns. The invention has parallel connecting structure of the excitation winding and the permanent magnet in space, bipolarity of phase magnetic flux, large magnetic chain change amplitude value and higher torque output capability and power density and is suitable for a low-speed straight application occasion.
Description
Technical field
The present invention relates to a kind of stator mixed excitation electric machine structure Design technology, belong to the technical field of design of electrical motor, specifically is a kind of multitooth magnetic bridge type hybrid excitation magnetic flux switching motor.
Background technology
Advantages such as permagnetic synchronous motor utilizes permanent magnetic material to replace excitation winding, does not have the excitation copper loss, and motor volume and weight greatly reduce, and has that power density is big, efficient is high, simple in structure, easy to maintenance, and is reliable.But because permanent magnet is placed on the rotor, need corresponding fixture be installed on rotor, cause cooling difficulty, and temperature rise may finally cause permanent magnet generation irreversible demagnetization, limit motor and exerted oneself, reduce power density.
Switched reluctance machines has advantage at aspects such as cost, efficient, speed adjusting performance, specific volume power, reliability, thermal diffusivities, but during as generator operation, because its power factor (PF) is low, when being operated in fast state, the burden aggravation of converter, and control strategy more complicated.
The magnetic flux reverse motor of the doubly salient permanent magnet motor of Lipo proposition in 1992, I.Boldea proposition in 1996 and the Magneticflux-switching type magneto of E.Hoang proposition in 1997 all belong to stator permanent magnetic type biconvex electrode structure motor, not only do not have permanent magnet but also do not have winding on the rotor, present achievement in research shows that these three kinds of motors all have advantages such as high power density, high efficiency.Every phase magnetic linkage of doubly salient permanent magnet motor is a bipolarity, and the back electromotive force harmonic content of rotor straight trough type double salient-pole electric machine is higher; The flux linkage characteristic of magnetic flux reverse motor is a bipolarity, but armature flux and permanent magnet flux connect, and exists the danger of permanent magnet generation irreversible demagnetization.So-called flux switch motor is meant the variation along with rotor-position, and magnetizing flux switches its path, makes the size and Orientation of the interior magnetic linkage of stator winding all change, thereby produces the electromotive force of alternation.Every phase permanent magnetism magnetic linkage of Magneticflux-switching type magneto is a bipolarity, and magnetic linkage and counter potential waveform be all near Sine distribution, and torque density is relative with power density higher.
The magneto magnetic pass switching electromotor adopts the permanent magnet excitation mode can't directly change magnetic field intensity, has the big and fault demagnetization difficulty of voltage regulation during as generator, is difficult to realize weak magnetic speed-up during as motor, the output-constant operation narrow range.
Summary of the invention
The invention provides a kind of simple in structurely, firm, have higher torque fan-out capability and power density, be suitable for directly changing magnetic field intensity and be applicable to directly the become multitooth magnetic bridge type hybrid excitation magnetic flux switching motor of application scenario of low speed.
For solving the problems of the technologies described above, multitooth magnetic bridge type hybrid excitation magnetic flux switching motor of the present invention comprises: the rotor 5 of stator 1, permanent magnet 2, armature winding 3, single-phase excitation winding 4 and salient pole type; Both do not had permanent magnet on the rotor 5 and do not had winding yet; Stator 1 comprises: be distributed in the stator poles 7 of a plurality of U types on the circumference and the iron core that constitutes one with each stator poles 7 and be connected in each stator poles 7 periphery is connected magnetic bridge 6; Each stator poles 7 has two ends, and each end is provided with two stator tooths 8, and the 8 same circle distribution of the stator tooth on each stator poles 7; Permanent magnet 2 is located between the adjacent U type arm of two adjacent stator poles 7, and armature winding 3 is located on the adjacent U type arm of two adjacent stator poles 7; The curved bottom of the stator poles 7 of described each U type is connected magnetic bridge 6 through connecting portion with iron core and is connected as a body, and each connecting portion is provided with magnet exciting coil, and the head and the tail series connection in regular turn of each magnet exciting coil constitutes single-phase excitation winding 4.
Further, described armature winding 3 comprises many to symmetrically arranged concentrated armature coil, and a pair of concentrated armature coil series connection also constitutes a phase armature winding.
Further, described permanent magnet 2 is ferrite or the Nd-Fe-B permanent magnetic magnet steel that tangentially alternately magnetize along circumference.
Further, between described permanent magnet 2 and the inwall that is connected magnetic bridge 6 unshakable in one's determination, be a dead slot between adjacent two described connecting portions, the energising polarity unanimity of two magnet exciting coils in each dead slot.
Further, described single-phase excitation winding 4 and each permanent magnet 2 spatially are parallel-connection structures, that is: the electric excitation main flux that produced of single-phase excitation winding 4 is without permanent magnet 2.
Among the present invention, the stator number of teeth is 4 times of permanent magnet blocks number, and air-gap field is made of jointly the electricity excitation magnetic field of excitation winding generation and the magnetic field of permanent magnet generation.Each stator poles has four stator tooths, and the rotor number of poles is 4*NS ± k, and NS is a stator poles, and K is a natural number; Fig. 1 is a three phase electric machine, NS=6; K=-5; Fig. 2 is four phase motors, NS=8; K=-6.
If motor is a three phase electric machine, then corresponding stator poles is 6*p, and p is a natural number; In Fig. 1,2, p=1.If four phase motors, then stator poles is 8*p, so analogizes: stator poles=2*m*p; M is the number of phases.
In rotor when rotation,, rotor pole aligns with different stator tooth, and the flow direction that passes each concentrated armature coil will change, thus the transition effects of generation magnetic flux, and the magnetic linkage of every thus phase armature winding institute linkage is a bipolarity.
Air-gap field is made of jointly the electricity excitation magnetic field of single-phase excitation winding generation and the magnetic field of permanent magnet generation, regulates air-gap field by changing the exciting current size and Orientation, thereby improves rotating speed of motor range of operation and weak magnetic energy power.The electricity excitation magnetic line of force connects the magnetic bridge closure via the iron core at permanent magnet top, can reduce electric exciting watts.
The positive technique effect that multitooth magnetic bridge type hybrid excitation magnetic flux switching motor of the present invention has: in (1) motor of the present invention, because the magnetic permeability of silicon steel sheet is greater than air and permanent magnet, therefore the electric excitation magnetic line of force connects the magnetic bridge closure via the iron core at permanent magnet top, the main flux that the respective electrical excitation winding is produced is without permanent magnet, reduced the danger that irreversible degaussing takes place permanent magnet.In addition, adopt less electric exciting watts just can reach adjustable magnetic effect preferably, corresponding electric excitation copper loss is also less.
(2) there are four stator tooths 8 end of each stator poles, is multiple tooth structure; Motor of the present invention adopts multiple tooth structure, and the respective rotor number of poles is higher than the common mixed excited magnetic pass switch motor with stator poles; If the motor application of invention is in the wind power generation occasion, output AC electricity frequency higher (ac frequency: fph=Nr*n/60, Nr are the rotor number of poles, and n is the per minute motor speed) under the identical wind speed, the required electric capacity of rectifying and wave-filtering link is also littler.
(3) rotor in the motor of the present invention is a salient-pole structure, does not have permanent magnet and winding, and is simple in structure, firm, and the motor cooling is convenient; (4) motor of the present invention has kept the every phase magnetic linkage of permanent magnet flux switching motor bipolarity, and torque is big, power density is high, magnetic linkage and the low advantage of back electromotive force harmonic content; (5 motors of the present invention have increased by a cover excitation winding, regulate air-gap field by changing the exciting current size and Orientation; (6) stator punching in the motor of the present invention becomes as a whole by iron core connection magnetic bridge, is convenient to processing.
Description of drawings
Fig. 1 is the structural representation of the three-phase multitooth magnetic bridge type hybrid excitation magnetic flux switching motor among the embodiment 1.
Fig. 2 is the structural representation of four phase multitooth magnetic bridge type hybrid excitation magnetic flux switching motors among the embodiment 2.
Fig. 3 is the magnetic line of force distribution map that the three-phase multitooth magnetic bridge type hybrid excitation magnetic flux switching motor permanent magnet among the embodiment 1 works independently.
Fig. 4 is the magnetic line of force distribution map that the three-phase multitooth magnetic bridge type hybrid excitation magnetic flux switching motor electricity excitation among the embodiment 1 works independently;
Embodiment
Below in conjunction with accompanying drawing the present invention is described further: embodiment 1: as shown in Figure 1, three-phase multitooth magnetic bridge type hybrid excitation magnetic flux switching motor of the present invention comprises stator 1 and rotor 5, rotor 5 with nineteen salient pole is positioned at the inside of stator 1, rotor 5 is made of the Alveolus type core lamination, no winding and permanent magnet; Stator 1 is provided with armature winding 3 in the three-phase set, single-phase excitation winding 4 and six permanent magnets 2.
Concentrate the A phase armature winding of armature winding 3 to concentrate armature coil 311 and second to concentrate armature coil 312 to constitute, and first concentrate armature coil 311 and second to concentrate armature coil 312 radially relative on circumference by first; Concentrate the B phase armature winding of armature winding 3 to concentrate armature coil 321 and the 4th to concentrate armature coil 322 to constitute, and the 3rd concentrate armature coil 321 and the 4th to concentrate armature coil 322 radially relative on circumference by the 3rd; Concentrate the C phase armature winding of armature winding 3 to concentrate armature coil 331 and the 6th to concentrate armature coil 332 to constitute, and the 5th concentrate armature coil 331 and the 6th to concentrate armature coil 332 radially relative on circumference by the 5th; Each armature winding is placed on the corresponding stator poles 7, and the head and the tail series connection successively of two concentrated armature coils in every phase armature winding.
Single-phase excitation winding 4 is in series by first magnet exciting coil 401, second magnet exciting coil 402, the 3rd magnet exciting coil 403, the 4th magnet exciting coil 404, the 5th magnet exciting coil 405, the 6th magnet exciting coil 406 order head and the tail successively.Between described permanent magnet 2 and the inwall that is connected magnetic bridge 6 unshakable in one's determination, be a dead slot between adjacent two described connecting portions, the energising polarity unanimity of two magnet exciting coils in each dead slot.
When rotor during in position shown in Figure 1, first in the A phase armature winding is concentrated the armature coil 311 and the second permanent magnet flux numerical value maximum of concentrating in the armature coil 312, and Fig. 3 has provided the finite element simulation magnetic line of force distribution map that this position permanent magnet works independently; Fig. 4 has provided the finite element simulation magnetic line of force distribution map that this position electricity excitation works independently, emulation experiment shows main flux that electric excitation winding produces without permanent magnet, has reduced the danger that irreversible degaussing takes place permanent magnet.
This moment, first concentrated armature coil 311 and second to concentrate the magnetic flux of linkage in the armature coil 312 to increase, and then improves induced electromotive force if apply the electric excitation magnetic potential identical with the permanent magnetic potential direction by single-phase excitation winding 4; If change the exciting current direction, first concentrates armature coil 311 and second to concentrate the magnetic flux of linkage in the armature coil 312 to reduce, and then reduces induced electromotive force.
Embodiment 2: as shown in Figure 2, four phase multitooth magnetic bridge type hybrid excitation magnetic flux switching motors of the present invention comprise stator 1 and rotor 5, and the rotor 5 with 26 salient poles is positioned at the inside of stator 1, and rotor 5 is made of the Alveolus type core lamination, no winding and permanent magnet; Stator 1 is provided with four and concentrates armature winding 3, single-phase excitation winding 4 and eight permanent magnets 2 mutually.Though stator 1 has increased by one group of magnet exciting coil and concentrated armature coil, its coiling principle is similar to embodiment 1, repeats no more.
Claims (5)
1. a multitooth magnetic bridge type hybrid excitation magnetic flux switching motor is characterized in that this motor comprises: the rotor (5) of stator (1), permanent magnet (2), armature winding (3), single-phase excitation winding (4) and salient pole type;
Both do not had permanent magnet on the rotor (5) and do not had winding yet;
Stator (1) comprising: be distributed in the stator poles (7) of a plurality of U types on the circumference and the iron core that constitutes one with each stator poles (7) and be connected in each stator poles (7) periphery is connected magnetic bridge (6); Each stator poles (7) has two ends, and each end is provided with two stator tooths (8), and the same circle distribution of stator tooth (8) on each stator poles (7);
Described permanent magnet (2) is located between the adjacent U type arm of adjacent two stator poles (7), and described armature winding (3) is located on the adjacent U type arm of adjacent two stator poles (7);
The curved bottom of the stator poles of described each U type (7) is connected magnetic bridge (6) through connecting portion with iron core and is connected as a body, and each connecting portion is provided with magnet exciting coil, and the head and the tail series connection in regular turn of each magnet exciting coil constitutes single-phase excitation winding (4).
2. multitooth magnetic bridge type hybrid excitation magnetic flux switching motor according to claim 1 is characterized in that: described armature winding (3) comprises many to symmetrically arranged concentrated armature coil, and a pair of concentrated armature coil series connection also constitutes a phase armature winding.
3. multitooth magnetic bridge type hybrid excitation magnetic flux switching motor according to claim 1 and 2 is characterized in that: described permanent magnet (2) is ferrite or the Nd-Fe-B permanent magnetic magnet steel that tangentially alternately magnetizes along circumference.
4. multitooth magnetic bridge type hybrid excitation magnetic flux switching motor according to claim 1 and 2, it is characterized in that: between described permanent magnet (2) and the inwall that is connected magnetic bridge (6) unshakable in one's determination, be a dead slot between adjacent two described connecting portions, the energising polarity unanimity of two magnet exciting coils in each dead slot.
5. multitooth magnetic bridge type hybrid excitation magnetic flux switching motor according to claim 1 and 2, it is characterized in that: described single-phase excitation winding (4) and each permanent magnet (2) spatially are parallel-connection structures, that is: the electric excitation main flux that produced of single-phase excitation winding (4) is without permanent magnet (2).
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| CN 201010125597 CN101834474A (en) | 2010-03-17 | 2010-03-17 | Multitooth magnetic bridge type hybrid excitation magnetic flux switching motor |
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| CN 201010125597 CN101834474A (en) | 2010-03-17 | 2010-03-17 | Multitooth magnetic bridge type hybrid excitation magnetic flux switching motor |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223035A (en) * | 2011-06-16 | 2011-10-19 | 东南大学 | Low-torque pulse axial magnetic field stator permanent magnet motor |
| CN102412691A (en) * | 2011-11-01 | 2012-04-11 | 何嘉颖 | Single-phase magnetic-flux switching-type variable reluctance motor |
| CN102570656A (en) * | 2012-01-04 | 2012-07-11 | 东风汽车零部件(集团)有限公司 | Electric-excitation brushless starter generator (motor) |
| CN103051138A (en) * | 2012-12-20 | 2013-04-17 | 东南大学 | Multi-tooth magnetic flux switching permanent magnetic memory motor |
| CN103390978A (en) * | 2013-07-18 | 2013-11-13 | 东南大学 | Double-stator disc type mixed excitation motor |
| CN103427517A (en) * | 2012-05-22 | 2013-12-04 | 巨铠实业股份有限公司 | multi-pole motor |
| CN103490575A (en) * | 2013-10-17 | 2014-01-01 | 东南大学 | Multi-tooth mixed excitation disc-type wind driven generator |
| CN103501063A (en) * | 2013-09-18 | 2014-01-08 | 东南大学 | Multi-tooth permanent magnet embedded magnetic flow switching type memory motor |
| CN104113251A (en) * | 2014-06-17 | 2014-10-22 | 曲阜师范大学 | Wind power generation-used modular electro-magnetic flux switching power generator |
| CN104539125A (en) * | 2015-01-19 | 2015-04-22 | 上海电机学院 | Mixed excitation flux switching motor |
| CN105790456A (en) * | 2016-04-29 | 2016-07-20 | 南京航空航天大学 | Three-phase mixed excitation magnetic flux switching motor structure |
| CN105811696A (en) * | 2016-04-27 | 2016-07-27 | 大连名阳实业有限公司 | Hybrid excitation type composite magnetic flux switching permanent-magnet motor |
| CN110071614A (en) * | 2019-05-24 | 2019-07-30 | 浙江大学 | A kind of double-fed electric excitation synchronous motor |
| CN110112852A (en) * | 2019-05-24 | 2019-08-09 | 浙江大学 | A kind of double-fed magneto |
| CN112542904A (en) * | 2020-12-16 | 2021-03-23 | 哈尔滨理工大学 | Novel mixed excitation motor stator structure |
| FR3105885A1 (en) | 2019-12-26 | 2021-07-02 | Thales | Two-stage electric drive system |
| CN114614585A (en) * | 2022-03-24 | 2022-06-10 | 浙江大学 | Linear-rotary hybrid excitation low-speed generator |
| CN114726119A (en) * | 2022-03-16 | 2022-07-08 | 江苏大学 | Single-winding double-excitation magnetic field modulation motor and collaborative excitation design method thereof |
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| WO2007101876A1 (en) * | 2006-03-08 | 2007-09-13 | Centre National De La Recherche Scientifique (Cnrs) | Flux-switching dual-excitation electrical machine |
| RU2382475C1 (en) * | 2009-02-05 | 2010-02-20 | Владимир Михайлович Чернухин | Contactless reducer electromagnetic machine with multipack inductor |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007101876A1 (en) * | 2006-03-08 | 2007-09-13 | Centre National De La Recherche Scientifique (Cnrs) | Flux-switching dual-excitation electrical machine |
| RU2382475C1 (en) * | 2009-02-05 | 2010-02-20 | Владимир Михайлович Чернухин | Contactless reducer electromagnetic machine with multipack inductor |
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| CN102223035B (en) * | 2011-06-16 | 2013-05-01 | 东南大学 | Low-torque pulse axial magnetic field stator permanent magnet motor |
| CN102223035A (en) * | 2011-06-16 | 2011-10-19 | 东南大学 | Low-torque pulse axial magnetic field stator permanent magnet motor |
| CN102412691A (en) * | 2011-11-01 | 2012-04-11 | 何嘉颖 | Single-phase magnetic-flux switching-type variable reluctance motor |
| CN102570656A (en) * | 2012-01-04 | 2012-07-11 | 东风汽车零部件(集团)有限公司 | Electric-excitation brushless starter generator (motor) |
| TWI449302B (en) * | 2012-05-22 | 2014-08-11 | Jaguar Prec Industry Co Ltd | Multi-pole electric machine |
| CN103427517A (en) * | 2012-05-22 | 2013-12-04 | 巨铠实业股份有限公司 | multi-pole motor |
| CN103427517B (en) * | 2012-05-22 | 2015-12-23 | 巨铠实业股份有限公司 | multi-pole motor |
| CN103051138A (en) * | 2012-12-20 | 2013-04-17 | 东南大学 | Multi-tooth magnetic flux switching permanent magnetic memory motor |
| CN103051138B (en) * | 2012-12-20 | 2015-04-15 | 东南大学 | Multi-tooth magnetic flux switching permanent magnetic memory motor |
| CN103390978A (en) * | 2013-07-18 | 2013-11-13 | 东南大学 | Double-stator disc type mixed excitation motor |
| CN103390978B (en) * | 2013-07-18 | 2016-03-16 | 东南大学 | A kind of bimorph transducer disc type mixed excitation electric machine |
| CN103501063A (en) * | 2013-09-18 | 2014-01-08 | 东南大学 | Multi-tooth permanent magnet embedded magnetic flow switching type memory motor |
| CN103501063B (en) * | 2013-09-18 | 2016-08-03 | 东南大学 | A kind of many flute profiles permanent magnetism embedded Magneticflux-switching type memory electrical machine |
| CN103490575A (en) * | 2013-10-17 | 2014-01-01 | 东南大学 | Multi-tooth mixed excitation disc-type wind driven generator |
| CN103490575B (en) * | 2013-10-17 | 2016-03-30 | 东南大学 | Multiple tooth mixing exciter panel type wind-driven generator |
| CN104113251A (en) * | 2014-06-17 | 2014-10-22 | 曲阜师范大学 | Wind power generation-used modular electro-magnetic flux switching power generator |
| CN104539125A (en) * | 2015-01-19 | 2015-04-22 | 上海电机学院 | Mixed excitation flux switching motor |
| CN105811696A (en) * | 2016-04-27 | 2016-07-27 | 大连名阳实业有限公司 | Hybrid excitation type composite magnetic flux switching permanent-magnet motor |
| CN105790456A (en) * | 2016-04-29 | 2016-07-20 | 南京航空航天大学 | Three-phase mixed excitation magnetic flux switching motor structure |
| CN105790456B (en) * | 2016-04-29 | 2018-02-06 | 南京航空航天大学 | A kind of three-phase hybrid excitation flux switch motor structure |
| CN110071614B (en) * | 2019-05-24 | 2021-02-09 | 浙江大学 | Double-fed type electro-magnetic synchronous motor |
| CN110112852A (en) * | 2019-05-24 | 2019-08-09 | 浙江大学 | A kind of double-fed magneto |
| CN110071614A (en) * | 2019-05-24 | 2019-07-30 | 浙江大学 | A kind of double-fed electric excitation synchronous motor |
| CN110112852B (en) * | 2019-05-24 | 2021-11-02 | 浙江大学 | Double-fed permanent magnet motor |
| FR3105885A1 (en) | 2019-12-26 | 2021-07-02 | Thales | Two-stage electric drive system |
| CN112542904A (en) * | 2020-12-16 | 2021-03-23 | 哈尔滨理工大学 | Novel mixed excitation motor stator structure |
| CN114726119A (en) * | 2022-03-16 | 2022-07-08 | 江苏大学 | Single-winding double-excitation magnetic field modulation motor and collaborative excitation design method thereof |
| WO2023173567A1 (en) * | 2022-03-16 | 2023-09-21 | 江苏大学 | Single-winding double-excitation flux modulation motor and collaborative excitation design method therefor |
| CN114726119B (en) * | 2022-03-16 | 2024-02-13 | 江苏大学 | Single-winding double-excitation magnetic field modulation motor and collaborative excitation design method thereof |
| CN114614585A (en) * | 2022-03-24 | 2022-06-10 | 浙江大学 | Linear-rotary hybrid excitation low-speed generator |
| CN114614585B (en) * | 2022-03-24 | 2023-11-21 | 浙江大学 | Linear-rotary hybrid excitation low-speed generator |
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Application publication date: 20100915 |