CN101699713B - Rotor sectional type flux switching motor and method for improving sine degree of back electromotive force thereof - Google Patents
Rotor sectional type flux switching motor and method for improving sine degree of back electromotive force thereof Download PDFInfo
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- CN101699713B CN101699713B CN2009101850271A CN200910185027A CN101699713B CN 101699713 B CN101699713 B CN 101699713B CN 2009101850271 A CN2009101850271 A CN 2009101850271A CN 200910185027 A CN200910185027 A CN 200910185027A CN 101699713 B CN101699713 B CN 101699713B
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- salient pole
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- 230000004907 flux Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 33
- 230000005284 excitation Effects 0.000 claims abstract description 22
- 241000239290 Araneae Species 0.000 claims description 29
- 230000004323 axial length Effects 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
- H02K21/44—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/02—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of variable reluctance type
- H02K37/04—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of variable reluctance type with rotors situated within the stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor sectional type flux switching motor and a method for improving the sine degree of back electromotive force thereof, belonging to the field of stator permanent-magnetic motors. The motor of the invention comprises salient pole stators, an armature winding, salient pole rotors and an electro-magnetic winding, wherein a permanent magnet is embedded in a gap between every two salient pole stators; the armature winding is wound on two salient pole stator arms connected with the permanent magnets; the electro-magnetic winding is wound on the permanent magnets in a vertical direction of the armature winding, and the excitation directions of adjacent permanent magnets are opposite; and the salient pole rotors are sectioned according to a space mechanical angle alpha along the axial direction. In the method of the invention, the back electromotive force generated by the salient pole stator A and the salient pole rotor A in the armature winding and the back electromotive force generated by the salient pole stator B and the salient pole rotor B in the armature winding have a phase difference of 180 degree electric angle, and correspondingly, the excitation directions of the permanent magnets embedded in salient pole stator teeth are opposite, so the back electromotive force of a synthesized unicoil has high sine degree and high amplitude value with the synthesized coefficient of 1.
Description
Technical field
The present invention relates to a kind of flux switch motor and method, relate in particular to the method for a kind of rotor sectional type flux switching motor and raising sine degree of back electromotive force thereof, belong to the specific type of electric machine field.
Background technology
In machine field, magneto has absolute advantage aspect efficient, power density, the torque density, more suitable to the occasion of volume and power requirement harshness.But its permanent magnet places on the rotor, high-power/and there are the following problems during wide rotating speed operation: and 1, centrifugal force is bigger during high speed rotating, must protect permanent magnet; 2, permanent magnet heat radiation difficulty; 3, magnetic field of permanent magnet and armature field are cascaded structure, and it is bigger that permanent magnet is influenced by armature field, when serious irreversible demagnetization can take place.
The switched reluctance machines stator and rotor are biconvex electrode structures, and no permanent magnet does not have winding yet on the rotor, and its rotor structure is the simplest.High voltage direct current switched reluctance machines starting/generating system also is the focus that Chinese scholars is paid close attention to and studied always, U.S. GE and Sund strand company beginning in 1985 joint research and development 270V high voltage direct current switched reluctance machines starting/generating system (30kw) under the subsidy of USAF, this system now is applied among the up-to-date Joint Strike Fighter F35 of U.S.'s exploitation, and it is to think the 270V high voltage direct current starting/generating system that performance is best at present in the world.
Switched reluctance machines is owing to be half period work, and power of motor density will be lower than magneto.Doubly salient permanent magnet motor, electric excitation biconvex electrode electric machine can be realized the complete period operation of motor by adding the second cover magnetic field, have improved the power density of motor.But the magnetic linkage waveform of double salient-pole electric machine is a unipolarity, and the utilance of motor material is not high, and in addition, the counter potential waveform of double salient-pole electric machine is rule inadequately, if adopt not control rectifying circuit of diode, power factor is lower when being operated in generating state.
The permanent-magnetic-switch flux linkage motor that belongs to the stator permanent-magnet motor with doubly salient permanent magnet motor can be regarded common switched reluctance machines as and slot on stator tooth on structure, inserts permanent magnet.Its rotor structure is identical with switched reluctance machines; From counter potential waveform, double polarity sine waveform back-emf is identical with the BLAC motor, so its power density is greater than switched reluctance machines; From the magnetic linkage waveform, permanent-magnetic-switch flux linkage motor magnetic linkage waveform is a bipolarity, and the utilance of motor material will be higher than doubly salient permanent magnet motor, electric excitation biconvex electrode electric machine.
In sum, the characteristics of permanent-magnetic-switch flux linkage motor are as follows: 1, permanent magnet places on the stator, is easy to cooling, is not subjected to centrifugal force; 2, distinctive " poly-magnetic " effect makes motor also can obtain higher air gap flux density when adopting the lower permanent magnet of coercive force; 3, rotor structure is simple, is easy to high-speed cruising; 4, magnetic field of permanent magnet and armature field are cascaded structure, and it is little that permanent magnet is influenced by armature field, and weak magnetic energy power is better than the rotor permanent-magnetic electric machine; 5, motor adopts centralized winding, and is simple in structure, and the end copper loss is little, the electric efficiency height; 6, torque density and power density are better than doubly salient permanent magnet motor and rotor permanent-magnetic electric machine.
But because the incomplete symmetry of flux switch motor body construction, the back-emf harmonic wave of its single coil is bigger, if use rotor chute, not only complex structure, and back-emf fundamental voltage amplitude reduces, and the torque density of motor, power density reduce.
Summary of the invention
The present invention is in order to solve not exclusively symmetry of flux switch motor body construction, the bigger problem of back-emf harmonic wave of its single coil and propose a kind of method that has the high flux switch motor of single coil back-emf amplitude height, sine degree of back electromotive force and improve sine degree of back electromotive force.
Rotor sectional type flux switching motor, comprise salient pole stator, armature winding, field spider, it is characterized in that also comprising electric excitation winding, space between per two salient pole stators embeds permanent magnet successively, twine armature winding on above-mentioned two salient pole stator arms that link to each other with permanent magnet, with on permanent magnet, twine electric excitation winding on the armature winding vertical direction, and the excitation direction on the adjacent permanent magnet is opposite, field spider is with the segmentation vertically of space mechanism angle [alpha], and the space mechanism angle [alpha] satisfies formula (1):
P in the formula (1)
rBe the rotor number of teeth.
2, a kind of method of the raising sine degree of back electromotive force based on the described rotor sectional type flux switching motor of claim 1, it is characterized in that: adopt described rotor sectional type flux switching motor, salient pole stator A, back-emf that field spider A produces in armature winding and salient pole stator B, 180 ° of electrical degrees of back-emf phase phasic difference that field spider B produces in armature winding, corresponding salient pole stator is opposite with the relative permanent magnet excitation direction of field spider, then He Cheng unicoil counter potential waveform shape is at 0 °～90 °, 90 °～180 °, 180 °～270 °, in full accord in 270 °～360 ° electrical degree intervals, the counter potential waveform harmonic constant reduces, thereby the raising sine degree of back electromotive force, and synthetic unicoil counter potential waveform amplitude is 2 times of every part counter potential waveform amplitude.
The inventive method has versatility, be applicable to the polytype flux switch motor, comprise traditional permanent magnet flux switching motor, conventional hybrid magnetic flux switching motor, every tooth excitation permanent magnet flux switching motor, every tooth mixed excited magnetic pass switch motor, stator poles logarithm P arbitrarily
sWith rotor number of teeth P
r, all can make the unicoil back-emf of motor have high sinusoidal degree, and composite coefficient is 1, back-emf amplitude height, power of motor density height.
The method of rotor sectional type flux switching motor of the present invention and raising sine degree of back electromotive force thereof, the angle that staggers of appropriate design sectional type rotor, two parts permanent magnet excitation direction is opposite, the high sinusoidal degree and the high amplitude of unicoil back-emf have been guaranteed, make that the motor operation number of phases can flexible design, kept high efficiency, high power density, the high torque density of flux switch motor.The present invention is useful in the occasion that flux switch motor is had different number of phases service requirements.
Description of drawings
Fig. 1 is a rotor sectional type flux switching motor general structure schematic diagram of the present invention, the number in the figure title: 1, salient pole stator A, 2, field spider A, 3, salient pole stator B, 4, field spider B, 5, machine shaft, 6, casing, 7, armature winding.
Fig. 2 is a rotor sectional type flux switching motor A partial cross section schematic diagram of the present invention, the number in the figure title: 7, and armature winding, 8, electric excitation winding, 9,, 10, permanent magnet A every the magnetic tooth.
Fig. 3 is a rotor sectional type flux switching motor B partial cross section schematic diagram of the present invention, the number in the figure title: 7, and armature winding, 8, electric excitation winding, 9,, 10, permanent magnet B every the magnetic tooth.
Fig. 4 is rotor sectional type flux switching motor field spider A of the present invention and the B angle schematic diagram that staggers.
Fig. 5 improves the sine degree of back electromotive force method to use type 1 among the present invention: traditional permanent magnet flux switching motor.
Fig. 6 improves the sine degree of back electromotive force method to use type 2 among the present invention: the conventional hybrid magnetic flux switching motor.
Fig. 7 improves the sine degree of back electromotive force method to use type 3 among the present invention: every tooth excitation permanent magnet flux switching motor.
Fig. 8 improves the sine degree of back electromotive force method to use type 4 among the present invention: every tooth mixed excited magnetic pass switch motor.
Fig. 9 is permanent magnetism magnetic linkage and the synthetic unicoil permanent magnetism magnetic linkage schematic diagram that permanent magnetism magnetic linkage, salient pole stator 3, field spider 4 that salient pole stator 1 of the present invention, field spider 2 produce in armature winding produce in armature winding.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, a kind of rotor sectional type flux switching motor, comprise salient pole stator A, salient pole stator B and field spider A, field spider B, field spider A is connected with rotating shaft with field spider B, the shared cover armature winding of salient pole stator A and salient pole stator B.Two parts stator cross-sectional geometry and axial length are in full accord, the space angle unanimity of two parts stator.Different is that two parts stator permanent magnet opposed excitation direction is opposite.Two parts rotor cross-sectional geometry and axial length are in full accord, and the space angle of two parts rotor differs α, and α must satisfy formula (1)
Formula (1), P
rBe the rotor number of teeth.
Fig. 5 improves the sine degree of back electromotive force method to use type 1 among the present invention: traditional permanent magnet flux switching motor.
Fig. 6 improves the sine degree of back electromotive force method to use type 2 among the present invention: the conventional hybrid magnetic flux switching motor.
Fig. 7 improves the sine degree of back electromotive force method to use type 3 among the present invention: every tooth excitation permanent magnet flux switching motor.
Fig. 8 improves the sine degree of back electromotive force method to use type 4 among the present invention: every tooth mixed excited magnetic pass switch motor.
Permanent magnetism magnetic linkage waveform and not quite identical in per 90 ° of electrical degrees of producing of the permanent magnetism magnetic linkage that in armature winding, produces of salient pole stator A, field spider A and salient pole stator B, field spider B as can be seen from Figure 9.
Satisfy at α under the condition of formula (1), 180 ° of electrical degrees of two part magnetic linkage phase phasic differences, has complementary advantage, the relative permanent magnet excitation direction of two parts motor is opposite simultaneously, so after the addition of two parts magnetic linkage, single coil magnetic linkage waveform in per 90 ° of electrical degrees is in full accord, magnetic linkage electromotive force sine degree height, the magnetic linkage composite coefficient is 1, and single coil magnetic linkage amplitude is 2 times of every part magnetic linkage amplitude.
Therefore, the back-emf of back-emf that salient pole stator A, field spider A produce in armature winding and salient pole stator B, field spider B generation is 180 ° of electrical degrees of phasic difference mutually, and the relative permanent magnet excitation direction of two parts motor is opposite, its synthetic unicoil back-emf has high sinusoidal degree, and composite coefficient is 1, back-emf amplitude height, power of motor density height.
This method has versatility, be applicable to the polytype flux switch motor, comprise traditional permanent magnet flux switching motor, conventional hybrid magnetic flux switching motor, every tooth excitation permanent magnet flux switching motor, every tooth mixed excited magnetic pass switch motor, stator poles logarithm P arbitrarily
sWith rotor number of teeth P
r, all can make the unicoil back-emf of motor have high sinusoidal degree, and composite coefficient is 1, back-emf amplitude height, power of motor density height.
Claims (2)
1. rotor sectional type flux switching motor, comprise the salient pole stator, armature winding, field spider, it is characterized in that also comprising electric excitation winding, the salient pole stator and the field spider of described motor all are divided into two parts, be respectively salient pole stator A, salient pole stator B, field spider A and field spider B, field spider A is connected with rotating shaft with field spider B, the shared cover armature winding of salient pole stator A and salient pole stator B, and two parts stator cross-sectional geometry and axial length are in full accord, two parts rotor cross-sectional geometry and axial length are in full accord simultaneously, space between per two salient pole stators embeds permanent magnet successively, with on permanent magnet, twine electric excitation winding on the armature winding vertical direction, and the excitation direction on the adjacent permanent magnet is opposite, two parts field spider is with the segmentation vertically of space mechanism angle [alpha], and the space mechanism angle [alpha] satisfies formula (1):
P in the formula (1)
rBe the rotor number of teeth.
2. method based on the raising sine degree of back electromotive force of the described rotor sectional type flux switching motor of claim 1, it is characterized in that: adopt described rotor sectional type flux switching motor, salient pole stator A, back-emf that field spider A produces in armature winding and salient pole stator B, 180 ° of electrical degrees of back-emf phase phasic difference that field spider B produces in armature winding, the motor part that salient pole stator A and field spider A constitute is opposite with relative permanent magnet excitation direction between the motor section that salient pole stator B and field spider B constitute is divided, then He Cheng unicoil counter potential waveform shape is at 0 °～90 °, 90 °～180 °, 180 °～270 °, in full accord in 270 °～360 ° electrical degree intervals, the counter potential waveform harmonic constant reduces, thereby the raising sine degree of back electromotive force, and synthetic unicoil counter potential waveform amplitude is 2 times of every part counter potential waveform amplitude.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101850271A CN101699713B (en) | 2009-10-28 | 2009-10-28 | Rotor sectional type flux switching motor and method for improving sine degree of back electromotive force thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101850271A CN101699713B (en) | 2009-10-28 | 2009-10-28 | Rotor sectional type flux switching motor and method for improving sine degree of back electromotive force thereof |
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| CN101699713A CN101699713A (en) | 2010-04-28 |
| CN101699713B true CN101699713B (en) | 2011-08-10 |
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| DE102015116992A1 (en) * | 2014-10-20 | 2016-04-21 | Asmo Co., Ltd. | Engine, method for driving a motor and drive control unit for a motor |
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| CN108063532A (en) * | 2017-11-30 | 2018-05-22 | 南京工业大学 | Double-stator structure two-phase doubly salient permanent magnet motor |
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