CN104795952B - Switched reluctance machines - Google Patents
Switched reluctance machines Download PDFInfo
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- CN104795952B CN104795952B CN201410029980.8A CN201410029980A CN104795952B CN 104795952 B CN104795952 B CN 104795952B CN 201410029980 A CN201410029980 A CN 201410029980A CN 104795952 B CN104795952 B CN 104795952B
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- stator
- salient pole
- switched reluctance
- reluctance machines
- pole tooth
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Abstract
The invention provides a kind of switched reluctance machines, including stator and rotor, the stator includes external stator and inner stator, the teeth portion of the external stator and the teeth portion of the inner stator are arranged with coil, the coil of the coil of the external stator and the inner stator is separate, the rotor is arranged between the inner stator and the external stator, and the rotor includes internal layer salient pole tooth and outer layer salient pole tooth；The teeth portion of the outer layer salient pole tooth and the external stator interacts, and the teeth portion of the internal layer salient pole tooth and the inner stator interacts.The switched reluctance machines of the present invention, by the independent connection of the coil on the coil and inner stator on external stator, independent control, the minimum value of motor torque is improved, so that on the premise of electric efficiency is not sacrificed, the torque pulsation of motor is reduced more than 30%.Meanwhile the flexibility of motor control is strengthened, improve the power density of motor.
Description
Technical field
The present invention relates to technical field of motors, more particularly to a kind of switched reluctance machines.
Background technology
Switched reluctance machines are because its is simple in construction, the advantages that motor reliability is good, and startability is excellent, and overall efficiency is high
Relatively broad research is obtained.But motor caused by the torque pulsations of switched reluctance machines is big, radial direction magnetic pull is big radially and
Tangential force cyclically-varying amplitude is excessive, produces exciting force, acts on the yoke portion of stator, vibrates it and acts on sky nearby
Gas, produce sound wave and noise.
The existing means for reducing torque pulsation mainly have following several：
1st, configuration aspects are using change gap structure so that stator teeth and rotor teeth portion are during, and air gap is by big
To small, there is transition stage so that its torque pulsation peak value reduces.Or the structures such as V-shaped groove are opened at the top of rotor tooth.But in air gap
During gradual change, or the structure using tooth top fluting so that the increase of its average airgap, so, produce needed for identical magnetic energy
The electric current increase wanted, motor whole efficiency reduce.
2nd, using double-stator structure, stator staggers certain angle.Wherein, winding is simultaneously turned off or turned on, however, interior
The angular relationship of external stator and rotor staggers, when double wedge is optimal turn-on instant outside external stator and rotor, inner stator and
It is not optimal turn-on instant that rotor inner layer double wedge is inevitable, therefore rather than the optimal mode for reducing torque pulsation.
3rd, permanent magnet is added, on the basis of the magnetic flux provided based on permanent magnet, to reduce torque pulsation.Due to permanent magnet work
Making environment can not be excessively severe, and therefore, the addition of permanent magnet causes the robustness of the application of switched reluctance machines to obtain significantly
Reduction.
4th, using bimorph transducer or dual-rotor structure, it is divided axially into both ends stator, and certain angle that staggers.But due to
The presence of motor end, larger distance, motor volume increase are certainly existed between two sections of stators, and power of motor density declines.
The content of the invention
In view of the present situation of prior art, it is an object of the invention to provide a kind of switched reluctance machines, are not sacrificing motor
On the premise of efficiency, the torque pulsation of motor is significantly reduced.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of switched reluctance machines, including stator and rotor；
The stator includes external stator and inner stator, and the teeth portion of the teeth portion of the external stator and the inner stator is arranged with
Coil, the coil of the coil of the external stator and the inner stator are separate；
The rotor is arranged between the inner stator and the external stator, and the rotor includes internal layer salient pole tooth and outer layer
Salient pole tooth；The teeth portion of the outer layer salient pole tooth and the external stator interacts, the internal layer salient pole tooth and the inner stator
Teeth portion interacts.
In one of the embodiments, the outer layer salient pole tooth and the internal layer salient pole tooth are along the switched reluctance machines
Radially protrude in the opposite direction；
The radial direction of the teeth portion of the external stator and the teeth portion of the inner stator along the switched reluctance machines is to opposite side
To protrusion.
In one of the embodiments, the outer layer salient pole tooth is identical with the quantity of the internal layer salient pole tooth and is more
It is individual；
Multiple outer layer salient pole teeth are uniformly distributed or the discrete periphery for being distributed in the rotor, multiple internal layer salient poles
Tooth is uniformly distributed or the discrete inner circumferential for being distributed in the rotor.
In one of the embodiments, the teeth portion of the external stator is identical with the quantity of the teeth portion of the inner stator and is
It is multiple；
The teeth portion of multiple external stators is uniformly distributed or the discrete inner circumferential for being distributed in the external stator, multiple described default
The teeth portion of son is uniformly distributed or the discrete periphery for being distributed in the inner stator.
In one of the embodiments, the physical dimension of the switched reluctance machines has following relation：
Alpha-beta=k τ r,
Wherein,
K takes 0.5-0.7；
NrFor the quantity of outer layer salient pole tooth/internal layer salient pole tooth of the rotor, m is the number of phases of coil；
α is the angle between center line corresponding to the outer layer salient pole tooth and the internal layer salient pole tooth；
β is the angle between center line corresponding to the teeth portion of the inner stator and the teeth portion of the external stator；
τ r are the polar arc of the outer layer salient pole tooth, and τ r ' are the polar arc of the internal layer salient pole tooth.
In one of the embodiments, the switched reluctance machines are the pole of 6 groove 4, the pole of 12 groove 8, the pole of 24 groove 16 or 24 grooves 18
Pole.
In one of the embodiments, the external stator is fixed on the housing of the switched reluctance machines, described default
The sub stationary shaft with the switched reluctance machines is fixedly connected, the stationary shaft of the switched reluctance machines and switching magnetic-resistance electricity
The housing of machine is fixed；
The external stator, the inner stator and the rotor are concentric.
The beneficial effects of the invention are as follows：
The switched reluctance machines of the present invention, pass through being independently connected, solely for the coil on the coil and inner stator on external stator
Vertical control, the minimum value of motor torque is improved, so as to which on the premise of electric efficiency is not sacrificed, the torque pulsation of motor be dropped
Low more than 30%.Meanwhile the flexibility of motor control is strengthened, improve the power density of motor.
Brief description of the drawings
Fig. 1 is the sectional view of the embodiment of switched reluctance machines one of the present invention；
Fig. 2 is sectional view of the switched reluctance machines in Fig. 1 in angle 1；
Fig. 3 is sectional view of the switched reluctance machines in Fig. 1 in angle 2；
Fig. 4 is sectional view of the switched reluctance machines in Fig. 1 in angle 3；
Fig. 5 is the switched reluctance machines torque output curve diagram in Fig. 1；
Fig. 6 is the angular relationship sign picture of the switched reluctance machines of the present invention.
Embodiment
In order that technical scheme is clearer, below in conjunction with accompanying drawing, the switched reluctance machines of the present invention are made
Further details of explanation.It should be appreciated that specific embodiment described herein is only explaining that the present invention is not used to limit
The present invention.
Referring to Fig. 1 to Fig. 6, as shown in figure 1, the switched reluctance machines of the present invention include stator and rotor.Wherein, stator bag
External stator 10 and inner stator 20 are included, external stator 10 is fixed on the housing of switched reluctance machines, inner stator 20 and switching magnetic-resistance electricity
The stationary shaft of machine is fixedly connected, and the stationary shaft of switched reluctance machines is fixedly connected with the housing of the switched reluctance machines, therefore outside
Stator 10 and 20 equal transfixion of inner stator.Coil 9 is arranged with the teeth portion 11 of external stator and the teeth portion 21 of inner stator.
Preferably, the coil on the coil and inner stator on external stator is separate, i.e., the coil on external stator with it is default
Coil independence line on son, independent control.Wherein, each phase coil of external stator is indicated with A, B, C（Only marked out in figure
A pair of poles, remaining coil press this circumferential cycle）, serial or parallel connection between each phase coil.Each phase coil of inner stator is entered with a, b, c
Row represents（A pair of poles are only marked out in figure, remaining presses this circumferential cycle）, serial or parallel connection between each phase coil.
Rotor is arranged between inner stator 20 and external stator 10, it is preferable that rotor, external stator and inner stator are concentric.When outer
After coil electricity on stator, the rotation for the field drives rotor that external stator is formed；It is default after coil electricity on inner stator
The rotation for the field drives rotor that son is formed.In the present embodiment, rotor includes two layers of salient pole tooth, respectively outer layer salient pole tooth 31
With internal layer salient pole tooth 32.The teeth portion 21 of internal layer salient pole tooth 32 and inner stator interacts, the tooth of outer layer salient pole tooth 31 and external stator
Portion 11 interacts.
By the independent connection of the coil on the coil and inner stator on external stator, independent control, motor torque is improved
Minimum value, so as on the premise of electric efficiency is not sacrificed, the torque pulsation of motor is reduced more than 30%.
As a kind of embodiment, outer layer salient pole tooth 31 is identical with the quantity of internal layer salient pole tooth 32 and is multiple.It is more
Individual outer layer salient pole tooth is uniformly distributed or the discrete periphery for being distributed in rotor, and multiple internal layer salient pole teeth are uniformly distributed or discrete are distributed in
The inner circumferential of rotor.And outer layer salient pole tooth 31 and internal layer salient pole tooth 32 are convex in the opposite direction along the radial direction of the switched reluctance machines
Go out, i.e., outer layer salient pole teeth directional is away from the direction of the stationary shaft of switched reluctance machines protrusion, internal layer salient pole teeth directional switched reluctance machines
Stationary shaft direction protrusion.
More preferably, the teeth portion 11 of external stator is identical with the quantity of the teeth portion 21 of inner stator and is multiple.Multiple external stators
Teeth portion 11 be uniformly distributed or the discrete inner circumferential for being distributed in external stator, the periphery of external stator is arc surface.The tooth of multiple inner stators
Portion 21 is uniformly distributed or the discrete periphery for being distributed in inner stator, and the inner circumferential of inner stator is arc surface.In the present embodiment, external stator
Teeth portion 11 and radial direction of the teeth portion 21 along the switched reluctance machines of inner stator protrude in the opposite direction.So cause in rotor
During rotation, the teeth portion of external stator and the outer layer salient pole tooth of rotor interact, the teeth portion of inner stator and the internal layer of rotor
Salient pole tooth interacts.
Preferably, the switched reluctance machines can be the pole of 6 groove 4, the pole of 12 groove 8, the pole of 24 groove 16 or the pole of 24 groove 18.In this implementation
In example, the switched reluctance machines are the pole of 12 groove 8.It should be understood that 12 grooves refer to the adjacent fingers on external stator/inner stator
At intervals of 12,8 poles refer to that the quantity of internal layer salient pole tooth/outer layer salient pole tooth on rotor is 8.As shown in figure 1, in order to state
It is convenient, multiple outer layer salient pole teeth 31 respectively with 1,2,3 ... 8 represent, multiple internal layer salient pole teeth divide 32 respectively with 1 ', 2 ',
3 ' ... 8 ' represent.
The operation logic of the switched reluctance machines of the present invention is as follows：
When the relative position of stator and rotor is as shown in Figure 2, the A phase coils of external stator are controlled to turn on, the outer layer of rotor
Teeth portion interaction where the A phase coils of salient pole tooth 1 and external stator, rotor are started to rotate counterclockwise by magnetic resistance pulling force effect.
When the relative position of stator and rotor is as shown in Figure 3, a phase coils conducting of inner stator is now controlled, rotor
Teeth portion where a phase coils of internal layer salient pole tooth 1 ' and inner stator starts to interact, rotor in the presence of magnetic resistance pulling force, after
It is continuous to rotate in the counterclockwise direction.Now, the A phase coils of external stator are begun to turn off, and the B phase coils of external stator are begun to turn on.
Conventional switched reluctance motor is during commutation, and because A phase coils turn off, B phase coils are in initial turn-on shape
State, the electric current of B phase coils not yet reach stable, it is excessive to cause torque drop.And the switched reluctance machines of the present invention are commutating
During, due to the interaction of the teeth portion where a phase coils with internal layer salient pole tooth 1 ' and inner stator so that motor
Minimum torque is lifted, and reduces torque pulsation.
When the relative position of stator and rotor is as shown in Figure 4, a phase coils of inner stator are controlled to turn off, now, external stator
The electric currents of B phase coils reach stationary value, the teeth portion where the B phase coils of external stator and the phase interaction of outer layer salient pole tooth 2 of rotor
With generation magnetic pull is with output torque so that rotor continues to rotate in the counterclockwise direction.
As repeated the position shown in Fig. 2 to Fig. 4 so that it is each mutually to be turned on according to A-a-B-b-C-c turn-on sequence, it is theoretical
On, smooth torque curve can be produced.Compared to traditional switched reluctance machines, switched reluctance machines of the invention are in each phase
During commutation, centre adds internal layer salient pole tooth and the interaction of inner stator of rotor, makes up rotor outer layer salient pole tooth with outer fixed
Torque pulsation of the son caused by commutation process.
Above-mentioned switched reluctance machines torque output schematic graph is illustrated in figure 5, dotted portion is former switching magnetic-resistance electricity
Machine torque exports schematic diagram, and the torque minimum value of the switched reluctance machines is lifted, and reduces torque pulsation.
In order to which preferably make it that the switched reluctance machines torque pulsation is reduced to minimum for step as described above, such as
Shown in Fig. 6, it is assumed that to rotate counterclockwise, its angle is described as follows rotor：
1st, the angle between center line corresponding to outer layer salient pole tooth and internal layer salient pole tooth is α（Convex outer pole is denoted as in figure
Angle between tooth 1 and internal layer salient pole tooth 1 '）；Preferably, α is 56 °.
2nd, the angle between center line corresponding to the teeth portion of inner stator and the teeth portion of external stator is β（It is outer fixed to be denoted as in figure
The angle between the teeth portion where teeth portion and inner stator a phase coils where sub- A phase coils）；Preferably, β is 49 °.
3rd, the polar arc of outer layer salient pole tooth is τ r, and the polar arc of internal layer salient pole tooth is τ r '.Preferably, τ r are 18 °, and τ r ' are 17 °.
The physical dimension of the switched reluctance machines should have following relation：
（1）Alpha-beta=k τ r, wherein k takes 0.5-0.7；
（2）Wherein NrFor the quantity of outer layer salient pole tooth/internal layer salient pole tooth, m is the phase of coil
Number.
The switched reluctance machines of the present invention, pass through being independently connected, solely for the coil on the coil and inner stator on external stator
Vertical control, the minimum value of motor torque is improved, so as to which on the premise of electric efficiency is not sacrificed, the torque pulsation of motor be dropped
Low more than 30%.Meanwhile the flexibility of motor control is strengthened, improve the power density of motor.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of switched reluctance machines, including stator and rotor, it is characterised in that：
The stator includes external stator and inner stator, and the equal winding of teeth portion of the teeth portion of the external stator and the inner stator is wired
Circle, the coil of the coil of the external stator and the inner stator are separate；
The rotor is arranged between the inner stator and the external stator, and the rotor includes internal layer salient pole tooth and outer layer salient pole
Tooth；The teeth portion of the outer layer salient pole tooth and the external stator interacts, the teeth portion of the internal layer salient pole tooth and the inner stator
Interaction；
The physical dimension of the switched reluctance machines has following relation：
<mrow>
<mi>&alpha;</mi>
<mo>-</mo>
<mi>&beta;</mi>
<mo>=</mo>
<mi>k</mi>
<mi>&tau;</mi>
<mi>r</mi>
<mo>,</mo>
<mfrac>
<mn>2</mn>
<mn>3</mn>
</mfrac>
<mi>&tau;</mi>
<mi>r</mi>
<mo>+</mo>
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
<msup>
<mi>&tau;r</mi>
<mo>&prime;</mo>
</msup>
<mo>&GreaterEqual;</mo>
<mfrac>
<mrow>
<mn>2</mn>
<mi>&pi;</mi>
</mrow>
<mrow>
<msub>
<mi>mN</mi>
<mi>r</mi>
</msub>
</mrow>
</mfrac>
<mo>;</mo>
</mrow>
Wherein,
K takes 0.5-0.7；
NrFor the quantity of outer layer salient pole tooth/internal layer salient pole tooth of the rotor, m is the number of phases of coil；
α is the angle between center line corresponding to the outer layer salient pole tooth and the internal layer salient pole tooth；
β is the angle between center line corresponding to the teeth portion of the inner stator and the teeth portion of the external stator；
τ r are the polar arc of the outer layer salient pole tooth, and τ r' are the polar arc of the internal layer salient pole tooth.
2. switched reluctance machines according to claim 1, it is characterised in that：
The radial direction of the outer layer salient pole tooth and the internal layer salient pole tooth along the switched reluctance machines is protruded in the opposite direction；
The radial direction of the teeth portion of the external stator and the teeth portion of the inner stator along the switched reluctance machines is convex in the opposite direction
Go out.
3. switched reluctance machines according to claim 2, it is characterised in that：
The outer layer salient pole tooth is identical with the quantity of the internal layer salient pole tooth and is multiple；
Multiple outer layer salient pole teeth are uniformly distributed or the discrete periphery for being distributed in the rotor, and multiple internal layer salient pole teeth are equal
Even distribution or the discrete inner circumferential for being distributed in the rotor.
4. switched reluctance machines according to claim 2, it is characterised in that：
The teeth portion of the external stator is identical with the quantity of the teeth portion of the inner stator and is multiple；
The teeth portion of multiple external stators is uniformly distributed or the discrete inner circumferential for being distributed in the external stator, multiple inner stators
Teeth portion is uniformly distributed or the discrete periphery for being distributed in the inner stator.
5. switched reluctance machines according to claim 1, it is characterised in that：
The switched reluctance machines are the pole of 6 groove 4, the pole of 12 groove 8, the pole of 24 groove 16 or the pole of 24 groove 18.
6. switched reluctance machines according to claim 1, it is characterised in that：
The external stator is fixed on the housing of the switched reluctance machines, and the inner stator is quiet with the switched reluctance machines
Only axle is fixedly connected, and the stationary shaft of the switched reluctance machines and the housing of the switched reluctance machines are fixed；
The external stator, the inner stator and the rotor are concentric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410029980.8A CN104795952B (en) | 2014-01-22 | 2014-01-22 | Switched reluctance machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410029980.8A CN104795952B (en) | 2014-01-22 | 2014-01-22 | Switched reluctance machines |
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| Publication Number | Publication Date |
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| CN104795952A CN104795952A (en) | 2015-07-22 |
| CN104795952B true CN104795952B (en) | 2018-02-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849408B (en) * | 2017-04-20 | 2017-09-12 | 郑州轻工业学院 | A kind of stator structure for weakening motor torque ripple |
| CN113078793B (en) * | 2021-05-14 | 2022-07-29 | 上海理工大学 | Air gap self-adaptive switched reluctance motor stator and rotor structure |
| CN113422486A (en) * | 2021-06-28 | 2021-09-21 | 南京工程学院 | Double-channel magnetic suspension switch reluctance fault-tolerant motor |
| CN113422485A (en) * | 2021-06-28 | 2021-09-21 | 南京工程学院 | Two-channel switch reluctance fault-tolerant motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038952Y (en) * | 2007-04-16 | 2008-03-19 | 顾为东 | Internal and outside dual stator and dual protrusion pole DC motor |
| CN101442242A (en) * | 2008-12-23 | 2009-05-27 | 南京航空航天大学 | Self-wind cooled rotor double-stator magneto resistance genus motor |
| CN103001423A (en) * | 2012-11-20 | 2013-03-27 | 史立伟 | Internal-external double-stator electro-magnetic double-salient starter generator |
| CN203761230U (en) * | 2014-01-22 | 2014-08-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Switched reluctance motor |
-
2014
- 2014-01-22 CN CN201410029980.8A patent/CN104795952B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038952Y (en) * | 2007-04-16 | 2008-03-19 | 顾为东 | Internal and outside dual stator and dual protrusion pole DC motor |
| CN101442242A (en) * | 2008-12-23 | 2009-05-27 | 南京航空航天大学 | Self-wind cooled rotor double-stator magneto resistance genus motor |
| CN103001423A (en) * | 2012-11-20 | 2013-03-27 | 史立伟 | Internal-external double-stator electro-magnetic double-salient starter generator |
| CN203761230U (en) * | 2014-01-22 | 2014-08-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Switched reluctance motor |
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Effective date of registration: 20181128 Address after: 519070 golden hill road, Qianshan, Zhuhai, Guangdong Co-patentee after: Zhuhai Gree Energy Saving & Refrigerating Technology Resarch Center Co., Ltd. Patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Address before: 519070 Science and Technology Building No. 789 Jinji Road, Qianshan, Zhuhai City, Guangdong Province Patentee before: Zhuhai Gree Energy Saving & Refrigerating Technology Resarch Center Co., Ltd. |