CN101562387A - Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux - Google Patents
Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux Download PDFInfo
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- CN101562387A CN101562387A CNA2009100720942A CN200910072094A CN101562387A CN 101562387 A CN101562387 A CN 101562387A CN A2009100720942 A CNA2009100720942 A CN A2009100720942A CN 200910072094 A CN200910072094 A CN 200910072094A CN 101562387 A CN101562387 A CN 101562387A
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Abstract
The invention provides a switched reluctance motor with torque pulsation inhibited by permanent magnetic flux, belongs to the motor field, and aims to solve the problem of unobvious effect of the prior method for inhibiting the torque pulsation of the switched reluctance motor. In the switched reluctance motor, a stator and a rotor both have a salient-pole structure; two permanent magnets are symmetrically embedded along the radial direction inside the external circle surface of a stator core, and are arranged in stator cores corresponding to stator phase windings in the radial direction; the magnetic flux direction generated by the permanent magnets is in accordance with the magnetic flux direction of excitation generated by a stator winding; and the stator winding generates a magnetic field to cover the permanent magnets. When the stator winding is not electrified, the permanent magnets and the stator core form a loop, and do not generate a torque to the motor rotor. After the stator winding is electrified, the torque generated by the permanent magnets is changed into positive from negative; when the torque generated by the permanent magnets is negative, a torque wave crest is inhibited; and when the torque generated by the permanent magnets is positive, a torque wave trough is compensated, so that the torque pulsation of the switched reluctance motor is effectively inhibited.
Description
Technical field
The present invention relates to switched reluctance motor with torque pulsation inhibited by permanent magnetic flux, belong to machine field.
Background technology
Switched reluctance machines is simple in structure owing to existing, control is convenient, high, the low cost and other advantages of unfailing performance, has now obtained the attention and the approval of all trades and professions.And there is the shortcoming that torque pulsation is big, noise is high in switched reluctance machines simultaneously, makes the application of switched reluctance machines be subjected to certain restriction, and the torque pulsation that therefore suppresses switched reluctance machines becomes the important directions of switched reluctance machines research.Existing switched reluctance machines method for suppressing torque ripple mainly contains: the motor body parameter optimization comprises aspects such as pole embrace optimization, short magnetic circuit structural, the cooperation of the rotor number of teeth; Novel Control comprises aspects such as torque distribution, iterative learning and modern control theory.Use existing which kind of method Torque Ripple Reduction effect all not obvious, and have certain limitation.
Summary of the invention
The objective of the invention is to solve the problem that existing method suppresses switched reluctance machines torque pulsation DeGrain, switched reluctance motor with torque pulsation inhibited by permanent magnetic flux is provided.
The present invention includes stator and rotor, stator is positioned at the outside of rotor, stator comprises the stator core and the stator tooth of annular, rotor comprises rotor core and rotor tooth, the internal circular surfaces of stator core is evenly equipped with stator tooth, and the outer round surface of rotor core is evenly equipped with rotor tooth, leaves air gap between stator and the rotor, the axial line of stator and the axial line of rotor coincide
Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux also comprises the permanent magnet of two block length bar shapeds, described two permanent magnets in stator core radially symmetry inlay, permanent magnet be provided with in the stator core with the radially corresponding zone of stator teeth groove in, the flow direction that permanent magnet produces is consistent with the flow direction that the stator winding excitation produces, and described stator winding generation magnetic field covers described permanent magnet.
Advantage of the present invention: during the stator winding no power, permanent magnet and stator core form the loop, and rotor is not produced torque.Behind the stator winding electrifying, the torque that permanent magnet produces is just being served as reasons negative change, and the torque that permanent magnet produces suppresses the torque crest when being negative, and the torque of permanent magnet generation is a timing compensating torque trough, the torque of switched reluctance machines output is steady, has effectively suppressed the torque pulsation of switched reluctance machines.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention; Fig. 2 is that A switches on mutually, and A phase stator tooth and the rotor tooth magnetic flux path schematic diagram when relative fully; Fig. 3 is that B begins the magnetic flux path schematic diagram constantly of switching on mutually; Fig. 4 is the magnetic flux path schematic diagram of B when switching on the rotor rotation low-angle mutually; Fig. 5 is the magnetic flux path schematic diagram of B when switching on the rotor rotation wide-angle mutually; Fig. 6 is that B switches on mutually, and the magnetic flux path schematic diagram when B phase stator tooth is relative fully with rotor tooth, Fig. 7 is the torque curve that the phase winding excitation produces, Fig. 8 is the torque curve that permanent magnet produces, and Fig. 9 is the torque of phase winding excitation generation and the synthetic torque curve of torque that permanent magnet produces.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 to Fig. 9, present embodiment comprises stator and rotor, stator is positioned at the outside of rotor, stator comprises the stator core 1 and the stator tooth 2 of annular, and rotor comprises rotor core 3 and rotor tooth 4, and the internal circular surfaces of stator core 1 is evenly equipped with stator tooth 2, the outer round surface of rotor core 3 is evenly equipped with rotor tooth 4, leave air gap 6 between stator and the rotor, the axial line of stator and the axial line of rotor coincide
Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux also comprises the permanent magnet 5 of two block length bar shapeds, described two permanent magnets 5 in stator core 1 radially symmetry inlay, permanent magnet 5 be provided with in the stator core 1 with the radially corresponding zone of stator teeth groove in, the flow direction that permanent magnet 5 produces is consistent with the flow direction that the stator winding excitation produces, and described stator winding generation magnetic field covers described permanent magnet 5.
Stator, the rotor of switched reluctance machines are salient-pole structure, and stator tooth 2 is 6: 4 with the gear ratio of rotor tooth 4, and the radical length of permanent magnet 5 is less than the annulus width of stator core 1.
Operation principle below in conjunction with specific embodiment explanation apparatus of the present invention, referring to Fig. 1, the quantity of stator tooth 2 is 6, the quantity of rotor tooth 4 is 4, under the situation that motor windings is not switched on, the magnetic circuit that permanent magnet 5 and stator core 1 form as shown in Figure 1, this magnetic flux is by stator tooth 2 and air gap 6, promptly can not form torque to the rotor of motor, identical with the cold situation of common switched reluctance machines.
When the energising of A phase winding, and the magnetic circuit when A phase stator tooth 2 and rotor tooth 4 are relative fully as shown in Figure 2, the magnetic flux path that the energising of A phase winding produces is: A phase stator tooth 2 → air gap 6 → rotor tooth 4 → rotor core 3 → air gap 6 → A ' phase stator tooth 2 → stator core 1 → A phase stator tooth 2, the magnetic flux path that permanent magnet 5 produces is: the S utmost point of the N utmost point → stator core 1 → A phase stator tooth 2 → air gap 6 → rotor tooth 4 → rotor core 3 → air gap 6 → A ' phase stator tooth 2 → stator core 1 → permanent magnet 5 of permanent magnet 5.The flow direction that the energising of A phase winding produces is consistent with the permanent magnet flux direction of permanent magnet 5, and therefore, the magnetic potential that A phase winding excitation magnetic potential and permanent magnet 5 produce superposes.
A phase stator tooth 2 and rotor tooth 4 be after relative fully moment, the outage of A phase winding, and the B phase winding begins energising.The B phase winding begins to switch on magnetic flux path constantly as shown in Figure 3: B phase stator tooth 2 → air gap 6 → rotor tooth 4 → rotor core 3 → air gap 6 → B ' phase stator tooth 2 → stator core 1 → B phase stator tooth 2, the magnetic flux path that permanent magnet 5 produces is: the S utmost point of the N utmost point → stator core 1 → A phase stator tooth 2 → air gap 6 → rotor tooth 4 → rotor core 3 → air gap 6 → A ' phase stator tooth 2 → stator core 1 → permanent magnet 5 of permanent magnet 5, the magnetic flux path that permanent magnet 5 produces does not change.
The B phase winding continues energising, when switched reluctance machines turns clockwise a low-angle, as shown in Figure 4, the magnetic flux that permanent magnet 5 produces will have sub-fraction to superpose with B phase winding magnetic flux through B phase winding stator tooth 2, induced electromotive force e magnetic flux path among Fig. 4 is that permanent magnet 5 produces magnetic flux in the path of B phase winding stator tooth 2, and the magnetic potential of described induced electromotive force e forms forward torque.And most of magnetic flux of permanent magnet 5 still passes through A phase stator tooth 2, and forms the opposing torque to rotor, and described opposing torque suppresses the forward torque crest that B phase winding excitation magnetic potential forms, and has reached the function that the motor torque crest is suppressed.
The B phase winding continues energising, when switched reluctance machines turns clockwise a wide-angle, as shown in Figure 5, the magnetic flux that permanent magnet 5 produces enters B phase winding stator tooth 2 to be increased gradually with the quantity that B phase winding magnetic flux superposes, forward torque increases, the quantity that the magnetic flux that permanent magnet 5 produces is stayed A phase stator tooth 2 reduces, and opposing torque reduces.When rotor turns over 15 when spending, the forward torque that produces of body magnetic 5 begins greater than opposing torque forever, and at this moment, the torque that permanent magnet 5 produces compensates the torque that B phase winding excitation magnetic potential produces.
The B phase winding continues energising, it is relative fully with rotor tooth that the switched reluctance machines dextrorotation goes to B phase winding stator tooth 2, as shown in Figure 6, the magnetic flux path that the energising of B phase winding produces is: B phase stator tooth 2 → air gap 6 → rotor tooth 4 → rotor core 3 → air gap 6 → B ' phase stator tooth 2 → stator core 1 → B phase stator tooth 2, the magnetic flux path that permanent magnet 5 produces is: the S utmost point of the N utmost point → stator core 1 → B phase stator tooth 2 → air gap 6 → rotor tooth 4 → rotor core 3 → air gap 6 → B ' phase stator tooth 2 → stator core 1 → permanent magnet 5 of permanent magnet 5.The flow direction that the energising of B phase winding produces is consistent with the permanent magnet flux direction of permanent magnet 5, and therefore, the magnetic potential that B phase winding excitation magnetic potential and permanent magnet 5 produce superposes.
The torque waveform that B phase winding excitation magnetic potential produces from large to small, as shown in Figure 7, the torque that permanent magnet 5 produces is just being served as reasons negative change, as shown in Figure 8, the torque that permanent magnet 5 produces suppresses B phase torque crest when being negative, the torque that permanent magnet 5 produces is a timing compensation B phase torque trough, and Fig. 7 and torque shown in Figure 8 are synthesized total motor torque as shown in Figure 9, synthetic torque has stationarity preferably, has effectively suppressed the torque pulsation of switched reluctance machines.
The operation principle that A phase, the energising of C phase winding suppress motor torque ripple is identical with the B phase winding.
Claims (4)
1, switched reluctance motor with torque pulsation inhibited by permanent magnetic flux, it comprises stator and rotor, stator is positioned at the outside of rotor, stator comprises the stator core (1) and the stator tooth (2) of annular, and rotor comprises rotor core (3) and rotor tooth (4), and the internal circular surfaces of stator core (1) is evenly equipped with stator tooth (2), the outer round surface of rotor core (3) is evenly equipped with rotor tooth (4), leave air gap (6) between stator and the rotor, the axial line of stator and the axial line of rotor coincide
It is characterized in that: switched reluctance motor with torque pulsation inhibited by permanent magnetic flux also comprises the permanent magnet (5) of two block length bar shapeds, described two permanent magnets (5) in stator core (1) radially symmetry inlay, permanent magnet (5) be provided with in the stator core (1) with the radially corresponding zone of stator teeth groove in, the flow direction that permanent magnet (5) produces is consistent with the flow direction that the stator winding excitation produces, and described stator winding generation magnetic field covers described permanent magnet (5).
2, switched reluctance motor with torque pulsation inhibited by permanent magnetic flux according to claim 1 is characterized in that: the radical length of permanent magnet (5) is less than the annulus width of stator core (1).
3, switched reluctance motor with torque pulsation inhibited by permanent magnetic flux according to claim 1 and 2 is characterized in that: stator tooth (2) is 6: 4 with the gear ratio of rotor tooth (4).
4, switched reluctance motor with torque pulsation inhibited by permanent magnetic flux according to claim 3 is characterized in that: stator and rotor are salient-pole structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100720942A CN101562387A (en) | 2009-05-22 | 2009-05-22 | Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux |
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| CNA2009100720942A CN101562387A (en) | 2009-05-22 | 2009-05-22 | Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810963A (en) * | 2011-06-02 | 2012-12-05 | 三星电机株式会社 | Switched reluctance motor |
| CN102969850A (en) * | 2011-09-01 | 2013-03-13 | 三星电机株式会社 | Switched reluctance motor |
| CN104600944A (en) * | 2014-06-23 | 2015-05-06 | 深圳市乐丰科技有限公司 | Permanent magnet switch reluctance machine and a stator assembly thereof |
| WO2016029777A1 (en) * | 2014-08-27 | 2016-03-03 | 中国矿业大学 | Three-phase switched reluctance motor torque ripple three-level suppression method |
| CN105490603A (en) * | 2015-12-28 | 2016-04-13 | 浙江科技学院 | Electromagnetic vibration control method for wheel hub side of electric car driven by wheel hub motor |
| CN106026586A (en) * | 2016-07-29 | 2016-10-12 | 冯西川 | Closed superimposed magnetic circuit switched reluctance DC motor |
| CN108494211A (en) * | 2018-05-24 | 2018-09-04 | 广州市科赛恩电气技术有限公司 | A kind of axial flux permanent magnet synchronous magnetic resistance motor |
| CN110474450A (en) * | 2019-09-09 | 2019-11-19 | 江蓝（深圳）新能源科技有限公司 | Integrated 64 pole switching reluctance motor of CVT |
-
2009
- 2009-05-22 CN CNA2009100720942A patent/CN101562387A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810963A (en) * | 2011-06-02 | 2012-12-05 | 三星电机株式会社 | Switched reluctance motor |
| CN102969850A (en) * | 2011-09-01 | 2013-03-13 | 三星电机株式会社 | Switched reluctance motor |
| CN104600944A (en) * | 2014-06-23 | 2015-05-06 | 深圳市乐丰科技有限公司 | Permanent magnet switch reluctance machine and a stator assembly thereof |
| AU2015309429B2 (en) * | 2014-08-27 | 2017-06-29 | China University Of Mining And Technology | Three-phase switched reluctance motor torque ripple three-level suppression method |
| WO2016029777A1 (en) * | 2014-08-27 | 2016-03-03 | 中国矿业大学 | Three-phase switched reluctance motor torque ripple three-level suppression method |
| US10224855B2 (en) | 2014-08-27 | 2019-03-05 | China University Of Mining And Technology | Three-phase switched reluctance motor torque ripple three-level suppression method |
| CN105490603A (en) * | 2015-12-28 | 2016-04-13 | 浙江科技学院 | Electromagnetic vibration control method for wheel hub side of electric car driven by wheel hub motor |
| CN105490603B (en) * | 2015-12-28 | 2018-01-12 | 浙江科技学院 | A kind of electric automobile hub side electromagnetism shock-absorbing control method of In-wheel motor driving |
| CN106026586A (en) * | 2016-07-29 | 2016-10-12 | 冯西川 | Closed superimposed magnetic circuit switched reluctance DC motor |
| CN106026586B (en) * | 2016-07-29 | 2020-05-12 | 冯西川 | Closed superimposed magnetic circuit switch reluctance DC motor |
| CN108494211A (en) * | 2018-05-24 | 2018-09-04 | 广州市科赛恩电气技术有限公司 | A kind of axial flux permanent magnet synchronous magnetic resistance motor |
| CN108494211B (en) * | 2018-05-24 | 2023-07-21 | 广州市科赛恩电气技术有限公司 | Axial flux permanent magnet synchronous reluctance motor |
| CN110474450A (en) * | 2019-09-09 | 2019-11-19 | 江蓝（深圳）新能源科技有限公司 | Integrated 64 pole switching reluctance motor of CVT |
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Open date: 20091021 |