CN101741203A - Switched reluctance motor with good positioning performance - Google Patents
Switched reluctance motor with good positioning performance Download PDFInfo
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- CN101741203A CN101741203A CN200810225956A CN200810225956A CN101741203A CN 101741203 A CN101741203 A CN 101741203A CN 200810225956 A CN200810225956 A CN 200810225956A CN 200810225956 A CN200810225956 A CN 200810225956A CN 101741203 A CN101741203 A CN 101741203A
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- 238000004804 winding Methods 0.000 claims abstract description 40
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 6
- 238000003475 lamination Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 230000009183 running Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses a switched reluctance motor with good positioning performance. The switched reluctance motor is characterized in that the phase number of the motor is more than 2, and each phase of magnetic circuits is independent and at low mutual coupling; due to the special structure of a rotor salient pole, the reset torque of a motor rotor has the regular torque-angle characteristics of sine wave when constant current passes through a phase winding; split phase control of the phase winding can be realized when a stator winding is driven; the rotor salient pole has a bigger pole-arc angle which is approximately one half of the polar moment of the rotor salient pole; and meanwhile, an air gap between the rotor salient pole and a stator salient pole is enlarged and the magnetic density in the air gap is reduced as the rotor salient pole and the stator salient pole deviate from the central line, and the two sides of the air gap are symmetrical to each other. The special structures of the stator and the rotor of the switched reluctance motor ensure the independence of each phase of magnetic circuits, low mutual coupling, small harmonic component, strong load capacity and direct split phase control.
Description
Technical field
The present invention relates to a kind of switched reluctance motor, location and torque angle displacement characteristic, so positioning performance is good.Specifically, relate to a kind of particular design, make the good switched reluctance motor of positioning performance by the rotor with salient pole structure.
Background technology
In general N phase switch reluctance motor, corresponding to the logarithm K of the every phase salient pole of stator, fixed/the rotor with salient pole number is 2KN/ (2K (N-1)), they are uniform on circumference.Wherein the phase arc angle of stator salient poles is about
The polar arc angle ratio of rotor with salient pole
Big slightly, the pole span of rotor with salient pole then is
In addition, the internal diameter of stator salient poles and the external diameter of rotor with salient pole are two concentric circless, that is show as Fig. 1, and air gap is uniform between fixed/rotor with salient pole.
All stator salient poles all are embedded with the identical coil of specification, and the coil of a uniform 2K salient pole is linked to be phase winding.When switching in winding, the magnetic of the salient pole of same phase is N.S and is spaced.The width of fixed/rotor with salient pole is equal substantially, and the sectional area of fixed/rotor magnetic Yoke is bigger than rotor with salient pole, designs like this, has guaranteed the independence of each phase magnetic circuit, and coupling is very little each other.
Above-mentioned switched reluctance motor except fundametal component, also exists sizable harmonic component in the torque that resets when one has communicated constant current.When being used as the variable reluctance stepping motor use, can switch on by a phase winding; Promptly make the mutually single N beat running of N.After N circulated mutually, motor field closed and turns over 2 π electrical degrees, and rotor turns over a pole span
So-called positioning performance is good, is meant that now electronic function makes the mutually more N beat runnings of N; During many N beat running, adjacent two-phase or multiphase passed to suitable electric current simultaneously.But it is just not all right that above-mentioned motor is made N phase dual-N-beat running, and when adjacent two-phase passed to equal electric current, the maximum of the torque that might reset was little, and carrying load ability is very poor.
Along with the increase of switch magnetic-resistance motor system speed governing, switched reluctance motor is expanded to the slow-speed of revolution, and 3 phase switch reluctance motors have begun to adopt phase-splitting control.Electric the going up of three phase windings of 3 phase motor insulated, and the power inversion circuit and the current sensor of the semibridge system of oneself respectively arranged, and carries out the phase-splitting control ratio and is easier to.As for 4 phase switch reluctance motor aspects, present four phase windings have any to connect together, and have used the power inversion circuit and the current sensor of two half-bridge forms, so can't directly carry out phase-splitting control.
Summary of the invention
The N phase switch reluctance motor that a kind of positioning performance that the present invention designs in order to solve the problems of the technologies described above just is good, N＞2, logarithm K corresponding to the every phase salient pole of stator, the distribution of 2KN stator salient poles, the connection of coil and winding is identical with general motor on polar arc angle profile of tooth and the salient pole, and the magnetic circuit of each phase is independent.Can carry out phase-splitting control to stator winding, concrete connection is not limit.
The technical solution adopted for the present invention to solve the technical problems is:
The switched reluctance motor that a kind of positioning performance is good comprises stator and rotor; Its motor number of phases is N, and wherein N＞2 are K corresponding to the every phase salient pole of stator logarithm, and 2KN salient pole is uniform on circumference; The polar arc angle of salient pole is about
The salient pole internal diameter is that a center of circle is the circle in axle center; All be embedded with coil on all stator salient poles, the coil of a uniform 2K salient pole is linked to be a phase winding, and the specification of each phase winding is the same; When aliving in phase winding, the magnetic that belongs to 2K salient pole of same phase is N.S and is spaced; The rotor with salient pole number is conventional 2K (N-1), and they are also uniform on circumference; Degree of saturation in the rotor with salient pole iron core is lighter, makes when aliving in the phase winding, is approximately to turn to counterclockwise to the torque that resets of positive rotor
Harmonic component is little, and M is the amplitude of m in the formula, and θ is the azimuth of the mutually a certain salient pole of energising (center line),
Turn to azimuth counterclockwise near the rotor with salient pole (center line) of this stator salient poles,
Be exactly rotor and the error angle of stator salient poles room machine,
It then is electric error angle.The good switched reluctance motor of described a kind of positioning performance, rotor polar distance is approached greater than the stator poles arc angle in the polar arc angle of its rotor with salient pole tooth top
Half; Salient pole tooth top profile is not to be the circle in axle center with the center of circle, air gap is uneven between rotor and stator salient poles, and along with angle constantly departs from the salient pole center line, salient pole reduces gradually to the radius in axle center, and air gap increases gradually between rotor and stator salient poles, salient pole center line both sides symmetry.
The good switched reluctance motor of described a kind of positioning performance has perforate on the both sides of its rotor with salient pole.
The good switched reluctance motor of described a kind of positioning performance, it embeds tooth top polar arc angle ratio in the rotor with salient pole lamination
Little silicon steel sheet, the salient pole center line will be aimed between them.
The good switched reluctance motor of described a kind of positioning performance, electric insulation between a stator N phase winding when N is even number, also allows two conducting phase difference π electrical degree to be in series, also interface is linked to each other then and draw, the electric current in each phase winding is controlled in the phase-splitting of realization stator winding.
The invention has the beneficial effects as follows: the switched reluctance motor stator that a kind of positioning performance is good and the special construction of rotor have guaranteed each independence of magnetic circuit mutually, and coupling is very little each other, and harmonic component is little, and load capacity is strong, can also directly carry out phase-splitting control.
Description of drawings
Fig. 1 is general switched reluctance motor rotor with salient pole structural representation.
Fig. 2 is a switched reluctance motor rotor with salient pole structural representation of the present invention.
Fig. 3 is the structural representation of switched reluctance motor rotor with salient pole both sides perforate of the present invention.
Fig. 4 is for embedding polar arc angle ratio in the switched reluctance motor rotor with salient pole lamination of the present invention
The structural representation of little silicon steel sheet.
Fig. 5 is a kind of connecting circuit figure of 4 phase switch reluctance motor terminal windings.
Fig. 6 is the another kind of connecting circuit figure of 4 phase switch reluctance motor terminal windings.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Be illustrated in figure 1 as general switched reluctance motor rotor with salient pole structural representation.
Be illustrated in figure 2 as the good switched reluctance motor of a kind of positioning performance, comprise stator 1 and rotor 2; The motor number of phases is N, and wherein N＞2 are K corresponding to stator 1 every phase salient pole logarithm, and 2KN salient pole is uniform on circumference; The polar arc angle of salient pole is about
The salient pole internal diameter is that a center of circle is the circle in axle center; All be embedded with coil on all stator salient poles, the coil of a uniform 2K salient pole is linked to be a phase winding, and the specification of each phase winding is the same; When aliving in phase winding, the magnetic that belongs to 2K salient pole of same phase is N.S and is spaced; The rotor with salient pole number is conventional 2K (N-1), and they are also uniform on circumference; Degree of saturation in the rotor with salient pole iron core is lighter, makes when aliving in the phase winding, is approximately to turn to counterclockwise to positive rotor 2 torque that resets
Harmonic component is little, and M is the amplitude of m in the formula,
Be the azimuth of the mutually a certain salient pole of energising (center line),
Turn to azimuth counterclockwise near the rotor with salient pole (center line) of this stator salient poles,
Be exactly rotor and the error angle of stator salient poles room machine,
It then is electric error angle.
The switched reluctance motor that a kind of positioning performance is good, rotor 2 pole spans are approached greater than stator 1 polar arc angle in the polar arc angle of its rotor 2 salient pole tooth tops
Half; Salient pole tooth top profile is not to be the circle in axle center with the center of circle, air gap is uneven between rotor 2 and stator 1 salient pole, and along with angle constantly departs from the salient pole center line, salient pole reduces gradually to the radius in axle center, and air gap increases gradually between rotor 2 and stator 1 salient pole, salient pole center line both sides symmetry.
The present invention is the good switched reluctance motor of a kind of positioning performance, and the structure of its stator salient poles, coil and phase winding are identical with general switched reluctance motor.Why number of phases N＞2 are in order can two-phase to switch on simultaneously at least, to clap positioning control thereby make the mutually more N of N.
Be illustrated in figure 3 as a kind of scheme of the good switched reluctance motor of a kind of positioning performance, on the both sides of its rotor 2 salient poles perforate 3 arranged.
Be illustrated in figure 4 as a kind of preferred version of the good switched reluctance motor of a kind of positioning performance, it embeds tooth top polar arc angle ratio in rotor 2 salient pole laminations
Little silicon steel sheet 4 is relative with the salient pole center line.
The good switched reluctance motor of described a kind of positioning performance, electric insulation between its stator 1 each phase winding, when N is even number, then two conducting phase difference π electrical degree are in series, also interface is linked to each other then and draw, the electric current in each phase winding is controlled in the 1 winding phase-splitting of realization stator.
In order to obtain the torque angle displacement characteristic of above-mentioned sinusoidal wave rule, except the polar arc angle of suitable increase rotor with salient pole tooth top, the present invention has suitably increased the magnetic resistance of salient pole center line both sides by changing air gap.Here do not consider before to decide/rotor with salient pole tooth depth part magnetic resistance, this part magnetic resistance is bigger when fixed/rotor with salient pole overlap angle is big, and the magnetic linkage increase is slower.After increasing air gap now, slow down than a hour magnetic flux increase in overlap angle.
By salient pole center line both sides perforate on the silicon steel sheet, perhaps embed the less silicon steel sheet in polar arc angle during lamination, also can make the magnetic resistance on rotor with salient pole both sides become big.But the way that changes air gap is more even, and also computational analysis easily is so this is a preferred version.
The replacement theory of electromagnetic energy and mechanical energy points out that the torque that resets is that electric current one regularly in the stator winding, magnetic energy produces with the error angle variation altogether.When electric current was zero, winding inductance also had the variation of sinusoidal wave rule, therefore, can understand waveform by inductance measuring and whether meet sinusoidal wave rule.
If be connected with direct current on the stator phase winding, allow motor with the constant rotational speed rotation then by prime mover band, then will produce the sinusoidal waveform no-load emf that amplitude is directly proportional with rotating speed on this stator winding.This principle provides a kind of method of checking waveform again.
The connection of motor stator winding has two kinds, is example with 4 phase switch reluctance motors, and connection as illustrated in Figures 5 and 6.Insulate totally 8 of outlet terminals on electric between 4 phase windings among Fig. 5.The A of conducting phase difference π among Fig. 6, the A of C phase
2, C
2End couples together draws the B of B, D phase
2, C
2Hold also like this, totally 6 of outlet terminals.
The present invention is not limited to above-mentioned preferred forms, and other any identical with the present invention or akin products that anyone draws under enlightenment of the present invention all drop within protection scope of the present invention.
Claims (5)
1. the switched reluctance motor that positioning performance is good comprises stator (1) and rotor (2); It is characterized in that: the motor number of phases is N, and wherein N＞2 are K corresponding to the every phase salient pole of stator (1) logarithm, and 2KN salient pole is uniform on circumference; The polar arc angle of salient pole is about
The salient pole internal diameter is that a center of circle is the circle in axle center; All be embedded with coil on all stator salient poles, the coil of a uniform 2K salient pole is linked to be a phase winding, and the specification of each phase winding is the same; When aliving in phase winding, the magnetic that belongs to 2K salient pole of same phase is N.S and is spaced; The rotor with salient pole number is conventional 2K (N-1), and they are also uniform on circumference; When aliving in the phase winding, be approximately m=-M Sin2K (N-1) to turn to counterclockwise to positive rotor (2) torque that resets
Harmonic component is little, and M is the amplitude of m in the formula, and θ is the azimuth of the mutually a certain salient pole of energising (center line),
Turn to azimuth counterclockwise near the rotor with salient pole (center line) of this stator salient poles,
Be exactly rotor and the error angle of stator salient poles room machine, 2K (N-1)
It then is electric error angle.
2. the good switched reluctance motor of a kind of positioning performance according to claim 1 is characterized in that: rotor (2) pole span is approached greater than stator (1) polar arc angle in the polar arc angle of rotor (2) salient pole tooth top
Half; Salient pole tooth top profile is not to be the circle in axle center with the center of circle, air gap is uneven between rotor (2) and stator (1) salient pole, along with angle constantly departs from the salient pole center line, salient pole reduces gradually to the radius in axle center, and air gap increases gradually between rotor (2) and stator (1) salient pole, salient pole center line both sides symmetry.
3. the good switched reluctance motor of a kind of positioning performance according to claim 2 is characterized in that: on the both sides of rotor (2) salient pole perforate (3) is arranged.
4. the good switched reluctance motor of a kind of positioning performance according to claim 2 is characterized in that: embed tooth top polar arc angle ratio in rotor (2) salient pole lamination
Little silicon steel sheet (4), the salient pole center line will align between them.
5. the good switched reluctance motor of a kind of positioning performance according to claim 1 is characterized in that: electric insulation between N phase winding of stator (1); When N is even number, allow two conducting phase difference π electrical degree to be in series, also interface is linked to each other then and draw, realize that stator (1) winding phase-splitting controls the electric current in each phase winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810225956 CN101741203B (en) | 2008-11-07 | 2008-11-07 | Switched reluctance motor with good positioning performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810225956 CN101741203B (en) | 2008-11-07 | 2008-11-07 | Switched reluctance motor with good positioning performance |
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| Publication Number | Publication Date |
|---|---|
| CN101741203A true CN101741203A (en) | 2010-06-16 |
| CN101741203B CN101741203B (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810225956 Expired - Fee Related CN101741203B (en) | 2008-11-07 | 2008-11-07 | Switched reluctance motor with good positioning performance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051098A (en) * | 2013-01-22 | 2013-04-17 | 广东肇庆新广仪科技有限公司 | Multi-component electric/magnetic passageway and low-cogging torque magnetic flow switching type motor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3458917B2 (en) * | 1995-07-06 | 2003-10-20 | ミネベア株式会社 | Motor structure |
| CN2857322Y (en) * | 2005-10-26 | 2007-01-10 | 刘自芦 | Switching reluctance motor having noise and torque pulsation reduced |
| CN101252302A (en) * | 2007-02-25 | 2008-08-27 | 郑荣春 | Two phase and three phase mixed type brushless DC motor |
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2008
- 2008-11-07 CN CN 200810225956 patent/CN101741203B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051098A (en) * | 2013-01-22 | 2013-04-17 | 广东肇庆新广仪科技有限公司 | Multi-component electric/magnetic passageway and low-cogging torque magnetic flow switching type motor |
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| CN101741203B (en) | 2011-08-31 |
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Owner name: NIDEC (BEIJING) DRIVE SYSTEM TECHNIQUE CO., LTD. Free format text: FORMER OWNER: BEIJING CHINA TEX MECHANICAL + ELECTRICAL ENGINEERING LTD. Effective date: 20150710 |
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Effective date of registration: 20150710 Address after: 101102 Beijing, Tongzhou District Sheng King South Street, No. 13, No. 101, 201-1, 301, 15, Patentee after: Nideke (Beijing) Transmission Technology Co. Ltd Address before: 101102, Beijing, Zhongguancun science and Technology Park, Jinqiao Science and technology industrial base, 15 South four street, 16A, Tongzhou District Patentee before: Beijing China Tex Mechanical & Electrical Engineering Ltd. |
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Granted publication date: 20110831 Termination date: 20171107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |