CN103296810A - Bearingless half-tooth-winding switched reluctance motor - Google Patents
Bearingless half-tooth-winding switched reluctance motor Download PDFInfo
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- CN103296810A CN103296810A CN201310172403XA CN201310172403A CN103296810A CN 103296810 A CN103296810 A CN 103296810A CN 201310172403X A CN201310172403X A CN 201310172403XA CN 201310172403 A CN201310172403 A CN 201310172403A CN 103296810 A CN103296810 A CN 103296810A
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Abstract
The invention discloses a bearingless half-tooth-winding switched reluctance motor. An even number of stator teeth are arranged on a stator. A centralized short-chord winding coil is sleeved on each stator teeth and comprises a torque winding and a suspension force winding which are arranged at an interval. The torque windings are used for outputting mechanical torque, and the suspension force windings are used for controlling displacement of a motor rotor in a horizontal X-axis direction and a vertical Y-axis direction. The motor keeps the advantage of simple and firm structure of a switched reluctance machine, only one coil is arranged on each stator tooth, groove full rate is high, and reliability is good; meanwhile bearingless running of the switched reluctance motor is realized by ingenious change of winding modes, so that the switched reluctance motor can give full play to the advantage of being suitable for high-speed and ultra-high-speed working, and has high theoretical and practical value.
Description
Technical field
The present invention relates to the technical field that motor is made, relate in particular to a kind of bearing-free switch reluctance motor of novel half tooth winding.
Background technology
Along with the quick rise of rare earth permanent-magnetic material price and supply are unstable, do not need the switched reluctance motor system of permanent magnet to obtain more and more widely concern.Switched reluctance machines is the biconvex electrode structure, and rotor is made by common silicon steel plate stacking, and no permanent magnet does not have winding yet on the rotor, has only centralized winding on the stator, and it is according to " magnetic resistance minimum " principle work.Switched reluctance machines make and maintenance cost low, simple in structure firm, robustness good, starting current is little, torque is big, speed-regulating range width, dynamic response is fast, and good fault-tolerance and reliability are arranged, in addition, owing to no permanent magnet and winding on its rotor, be very suitable for high-speed cruising.The switched reluctance machines range of application is very extensive, has shown powerful competitiveness at aspects such as industrial governing system, household electrical appliance, Aero-Space, electric automobiles.
On the other hand, at a high speed and fields such as ultrahigh speed drives, sealing transmission and Aero-Space, the no bearing running technology of motor there is active demand.Because many limitations of mechanical bearing, common electric machine can't satisfy the requirement that runs up for a long time; The control appliance of air supporting and liquid bearing is huger, the cost height, and reliability is low; Advantages such as magnetic suspension bearing has does not have the machinery wearing and tearing, need not lubricated and system sealing, and adaptive capacity to environment is strong, but magnetic bearing electric system overall structure is complicated, axial occupation space, power density are not high, and critical whirling speed and power capacity are difficult to increase substantially.1985, quick and strong device for power switching and the appearance of digital signal processor of load capacity made the alternating current machine vector control technology that has proposed more than 20 year be able to practical application, solved the numerically controlled difficult problem of bearing-free motor like this.The Bick that of the federal engineering college of Zurich, SUI just produces bearing-free motor first in the later stage eighties 20th century on the basis of these scientific and technological progresses.By to being placed on the reasonable control of the winding on the stator, bearing-free motor can be simple as the motor of mechanical bearings, and electric control system is very not complicated.
Bearing-free motor integrates rotation and drives and the magnetic bearing function, it utilizes the similitude on magnetic bearing and the electric machine structure, with the suspending windings in the magnetic bearing and motor winding together lap wound in stator core, size and Orientation by control suspending windings electric current makes the magnetic field of its generation break the motor primary winding produces magnetic field in air gap balance, thereby produce all controlled suspending powers of a size and Orientation at rotor, with the rotation that realizes rotor with suspend certainly.
Than the induction machine and the permagnetic synchronous motor that adopt no bearing technology, bearing-free switch reluctance motor is simple in structure, make that maintenance cost is low, control is convenient, need not to use permanent magnet, robustness is good, reliability is high, and rotor also is suitable for ultrahigh speed and moves.
The bearing-free switch reluctance motor that proposes at present mainly all is coiling two cover windings on each stator tooth of motor, bear the function of torque winding and suspending power winding respectively, like this, the coil number of motor is the twice of the stator number of teeth, adopt the bearing-free switch reluctance motor of this method, complex structure, copper factor is low, and torque winding and suspending power winding are nested on the same stator tooth, magnetic circuit is almost completely identical, and fault-tolerance and reliability are low, and the magnetic circuit coupling is very serious, limit the actual carrying load ability of bearing-free switch reluctance motor, become the main bottleneck that its engineering is used.
Therefore, need a kind of new technical scheme to address the above problem.
Summary of the invention
The objective of the invention is the deficiency at the prior art existence, get around the basic characteristics of closing reluctance motor in conjunction with bearing-free motor and novel half tooth, provide that a kind of copper factor is higher, efficient is more excellent, fault-tolerance and higher no bearing-type half tooth of reliability get around and close the reluctance motor structure, and this structure is fit to any number of phases, the switched reluctance machines that cooperates of rotor teeth groove number arbitrarily.
For achieving the above object, the present invention does not have bearing-type half tooth and gets around and close reluctance motor and can adopt following technical scheme:
A kind of no bearing-type half tooth gets around the pass reluctance motor, comprise stator and rotor, described stator is provided with the even number stator tooth, and is equipped with concentrated winding on the stator tooth, and concentrated winding coil comprises for the torque winding of output mechanical energy and is used for the suspending power winding of floatation electric motor rotor; In adjacent two stator tooths, be wound with the torque winding on the stator tooth, be wound with the suspending power winding on another stator tooth, both there be not permanent magnet on the rotor, there is not winding yet.
Further, the suspending power winding has two groups at least, one group of axial rotor displacement of control horizontal X, the axial rotor displacement of another group control vertical Y
Further, this motor can adopt inner rotor core, also can adopt outer-rotor structure.
Further, this motor both can be made electric operation, can make generator operation again.
Further, the profile of tooth of the torque tooth on the motor stator is identical with the facewidth or inequality with the profile of tooth of the facewidth and suspending power tooth
Compared with prior art, the present invention has following beneficial effect:
1, no bearing-type half tooth of the present invention gets around and closes reluctance motor has been realized motor under the situation that does not change regular tap reluctance motor iron-core lamination no design bearing.Motor stator and rotor core do not need to change, and are laminated by common silicon steel punched chip to constitute, and just the winding winding has had bigger change.The motor stator tooth is divided into torque tooth and suspending power tooth, and cover is useful on the torque winding of output torque on the torque tooth, and cover is useful on the suspending power tooth of suspension rotor on the suspending power tooth, and the number of turn and the line footpath of two cover windings are all inequality.
2, simple in structure firm, low cost of manufacture does not need to use permanent magnet, and robustness is good.In addition, torque winding and suspending power winding are centralized coil, and the coiling difficulty is low, and the end is shorter, has effectively reduced copper loss, has reduced axial length, has improved power density, and are beneficial to the heat radiation of motor.
3, no winding and permanent magnet on the rotor, moment of inertia is little, and does not have the frictional dissipation that bearing arrangement has avoided mechanical bearing to bring, and is fit to very much move with ultrahigh speed at a high speed.
4, torque winding and suspending power winding are not nested on the same stator tooth, and it is less to be coupled, and can independently control.
Suspending power winding of the present invention is nested on the different stator tooths with the torque winding, rely on the interaction of suspending power winding energising back and air-gap field, produce the controlled horizontal direction radial suspension force of size and Orientation and vertical direction radial suspension force respectively, thereby realize the stable magnetic suspension of rotor; Rely on the interaction of torque winding energising back and air-gap field, produce electromagnetic torque, drive the rotor rotation.
Description of drawings
Fig. 1 is that the embodiment of the invention 1 adopts half tooth of threephase stator 12 grooves/rotor 8 electrode structures around the horizontal sectional structure schematic diagram of formula bearing-free switch reluctance motor.
Fig. 2 is that structure shown in the embodiment of the invention 1 is at the air-gap field variation of certain rotor-position and the schematic diagram of force in radial.
Fig. 3 is that the embodiment of the invention 2 adopts half tooth of four phase stators, 8 grooves/rotor 6 electrode structures around the horizontal sectional structure schematic diagram of formula bearing-free switch reluctance motor.
Fig. 4 is that structure shown in the embodiment of the invention 2 is at the air-gap field variation of certain rotor-position and the schematic diagram of force in radial.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used for explanation the present invention and is not used in and limits the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail.
A kind of no bearing-type half tooth of the present invention gets around the pass reluctance motor, comprises stator 1 and rotor 4.Stator 1 is provided with the even number stator tooth.Form stator slot between the adjacent stators tooth.Each stator tooth radially has a stator tooth relative with it along stator.Stator tooth is provided with concentrated winding coil, and this concentrated winding coil comprises for the torque winding 2 of output mechanical energy and is used for the suspending power winding 3 of suspension rotor.Concentrated winding is placed in the stator slot of stator 1, and stator tooth is twined.In adjacent two stator tooths, be wound with the coil of torque winding 2 on stator tooth, be wound with the coil of suspending power winding 3 on another stator tooth.That is to say that torque winding 2 and suspending power winding 3 are circumferentially alternately arranged along stator 1.
Further, described stator 1 and rotor 4 are salient-pole structure, and rotor 4 can be set to internal rotor, also can be set to external rotor.When rotor 4 was internal rotor, stator 1 was positioned at the outside of rotor 4.When rotor 4 was external rotor, stator 1 was positioned at the inboard of rotor 4.No winding and permanent magnet on the rotor 4.
No bearing half tooth of the present invention around the working mechanism of formula switched reluctance machines is: follow the magnetic resistance minimum principle, be that magnetic flux is always along the path closure of magnetic resistance minimum, when stator tooth and rotor tooth center line do not overlap, be that magnetic conductance is when maximum, magnetic field will produce tangential magnetic pull, form reluctance torque, make rotor 4 forward the position of magnetic conductance maximum to; In addition, when rotor during at diverse location, according to different rotor displacements, give suitable suspending power winding energising, can produce radially magnetic pull and eliminate rotor eccentricity, rotor stability is suspended.
Key of the present invention is for being, only by changing winding construction, can make rotor stablize magnetic suspension and export torque, the profile of tooth that is wound with the stator tooth of torque winding and the stator tooth that is wound with the suspending power winding on the motor stator can be identical with the facewidth, also can.
The present invention can be applied to any number of phases, any rotor teeth groove array switched reluctance machines structure of closing.Following example specifies technical scheme of the present invention and operation principle thereof for two example two.
Embodiment 1: be that example describes with threephase stator 12 grooves/rotor 8 pole switching reluctance electric machine structures.
As shown in Figure 1, present embodiment adopts threephase stator 12 grooves/rotor 8 utmost point electric machine structures, 12 salient pole teeth are arranged on the stator, all be with a concentrated winding coil on each stator tooth, be with 12 coils altogether, by counterclockwise being called successively: the first torque winding coil 2A1, the first suspending power winding coil 3X11, the second torque winding coil 2B1, the second suspending power winding coil 3Y1, the 3rd torque winding coil 2C1, the 3rd suspending power winding coil 3X21, the 4th torque winding coil 2A2, the 4th suspending power winding coil 3X22, the 5th torque winding coil 2B2, the 5th suspending power winding coil 3Y2, the 6th torque winding coil 2C2 and the 6th suspending power winding coil 3X12.
At motor rotor position shown in Figure 2, the energising of A phase torque winding, at this moment, stator 2A1 crown and air gap place, 2A2 crown place all produce direction magnetic linkage left.Shown in Fig. 2 (a), when direction shown in X1 phase suspending power winding is pressed is switched on, close being reinforced of magnetic at 2A1 crown air gap place, and the magnetic at 2A2 crown air gap place is close constant substantially, so 2A1 and 2A2 crown place air gap flux density be balance no longer, rotor will be subjected to direction radially magnetic pull to the right; Shown in Fig. 2 (b), when direction shown in X2 phase suspending power winding is pressed is switched on, close being reinforced of magnetic at 2A2 crown air gap place, and the magnetic at 2A1 crown air gap place is close constant substantially, so 2A2 and 2A1 crown place air gap flux density be balance no longer, rotor will be subjected to direction radially magnetic pull left; Shown in Fig. 2 (c), when direction shown in Y1 phase suspending power winding is pressed is switched on, close being reinforced of magnetic at 3Y1 crown air gap place, and the magnetic at 3Y2 crown air gap place is close constant substantially, so 3Y1 and 3Y2 crown place air gap flux density be balance no longer, rotor will be subjected to the radially magnetic pull that direction makes progress; Shown in Fig. 2 (d), when direction shown in Y2 phase suspending power winding is pressed is switched on, close being reinforced of magnetic at 3Y2 crown air gap place, and the magnetic at 3Y1 crown air gap place is close constant substantially, so 3Y2 and 3Y1 crown place air gap flux density be balance no longer, the radially magnetic pull that rotor will be directed downwards.
There are two cover windings in this motor, i.e. A, B, C three-phase torque winding and X1, X2, Y1, Y2 four suspending power winding mutually.This system can drive with seven phase power circuits.
It is emphasized that in this embodiment the torque tooth of motor stator and suspending power tooth are through optimizing, their profile of tooth and the facewidth are inequality.And the torque winding is different with the line footpath of suspending power winding with the number of turn.
Embodiment 2: be that example describes with four phase stators, 8 grooves/rotor 6 pole switching reluctance electric machine structures.
As shown in Figure 3, present embodiment adopts four phase stators, 8 grooves/rotor 6 utmost point electric machine structures, 8 salient pole teeth are arranged on the stator, all be with a concentrated winding coil on each stator tooth, be with 8 coils altogether, by counterclockwise being called successively: the first suspending power winding coil 3X11, the first torque winding coil 2A1, the second suspending power winding coil 3Y1, the second torque winding coil 2B1, the 4th suspending power winding coil 3X22, the 4th torque winding coil 2A2, the 5th suspending power winding coil 3Y2,, the 5th torque winding coil 2B2.
At motor rotor position shown in Figure 4, the energising of A phase torque winding.At this moment, stator 2A1 crown and air gap place, 2A2 crown place all produce the direction magnetic linkage of below left.Shown in Fig. 4 (a), when direction shown in X1 phase suspending power winding is pressed is switched on, close being reinforced of magnetic at 3X11 crown air gap place, and the magnetic at 3X22 crown air gap place is close constant substantially, so 3X11 and 3X22 crown place air gap flux density be balance no longer, rotor will be subjected to direction radially magnetic pull to the right; Shown in Fig. 4 (b), when direction shown in X2 phase suspending power winding is pressed is switched on, close being reinforced of magnetic at 3X22 crown air gap place, and the magnetic at 3X11 crown air gap place is close constant substantially, so 3X22 and 3X11 crown place air gap flux density be balance no longer, rotor will be subjected to direction radially magnetic pull left; Shown in Fig. 4 (c), when direction shown in Y1 phase suspending power winding is pressed is switched on, close being reinforced of magnetic at 3Y1 crown air gap place, and the magnetic at 3Y2 crown air gap place is close constant substantially, so 3Y1 and 3Y2 crown place air gap flux density be balance no longer, rotor will be subjected to the radially magnetic pull that direction makes progress; Shown in Fig. 4 (d), when direction shown in Y2 phase suspending power winding is pressed is switched on, close being reinforced of magnetic at 3Y2 crown air gap place, and the magnetic at 3Y1 crown air gap place is close constant substantially, so 3Y2 and 3Y1 crown place air gap flux density be balance no longer, the radially magnetic pull that rotor will be directed downwards.
There are two cover windings in this motor, i.e. A, B two-phase torque winding and X1, X2, Y1, Y2 four suspending power winding mutually.This system can drive with six phase power circuits.
It is emphasized that in this embodiment the torque tooth on the motor stator keeps profile of tooth identical with the facewidth with the suspending power tooth, but the line of torque winding and suspending power winding footpath is inequality with the number of turn.
Claims (4)
1. no bearing-type half tooth gets around the pass reluctance motor, comprise stator (1) and rotor (4), it is characterized in that: described stator (1) is provided with the even number stator tooth, and be equipped with concentrated winding on the stator tooth, concentrated winding coil comprises for the torque winding (2) of output mechanical energy and is used for the suspending power winding (3) of floatation electric motor rotor; In adjacent two stator tooths, be wound with torque winding (2) on the stator tooth, be wound with suspending power winding (3) on another stator tooth, both there be not permanent magnet on the rotor, there is not winding yet.
2. no bearing-type half tooth according to claim 1 gets around the pass reluctance motor, it is characterized in that: the suspending power winding has two groups at least, one group of axial rotor displacement of control horizontal X, the axial rotor displacement of another group control vertical Y.
3. no bearing-type half tooth according to claim 1 and 2 gets around the pass reluctance motor, and it is characterized in that: this motor is made electric operation or generator operation.
4. no bearing-type half tooth according to claim 1 gets around the pass reluctance motor, it is characterized in that: the profile of tooth of the stator tooth that is wound with the torque winding on the described stator (1) is identical with the facewidth or inequality with the profile of tooth of the stator tooth that is wound with the suspending power winding with the facewidth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310172403.XA CN103296810B (en) | 2013-05-10 | 2013-05-10 | A kind of bearing-free formula half tooth is around switched reluctance machines |
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| CN201310172403.XA CN103296810B (en) | 2013-05-10 | 2013-05-10 | A kind of bearing-free formula half tooth is around switched reluctance machines |
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| CN103296810B CN103296810B (en) | 2015-11-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872811A (en) * | 2014-03-17 | 2014-06-18 | 东南大学 | Bearing-less stator surface mounting type permanent magnet motor for semi-tooth winding |
| CN104821697A (en) * | 2015-04-29 | 2015-08-05 | 江苏大学 | Fault-tolerant type four-phase switch reluctance motor used for driving of electric automobile |
| CN108809031A (en) * | 2018-06-30 | 2018-11-13 | 淮阴工学院 | A kind of Three Degree Of Freedom bearing-free switch reluctance motor of constant-current source excitation |
| CN113839592A (en) * | 2021-09-18 | 2021-12-24 | 福州大学 | Time-optimal bearingless magnetic flux switching motor torque and suspension force prediction control method |
| CN116365816A (en) * | 2022-11-29 | 2023-06-30 | 南京航空航天大学 | 6/4-pole bearingless doubly salient sheet motor with parallel structure and suspension control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6727618B1 (en) * | 2002-06-10 | 2004-04-27 | The United States Of America, As Represented By The Administrator Of National Aeronautics And Space Administration | Bearingless switched reluctance motor |
| WO2010137766A1 (en) * | 2009-05-28 | 2010-12-02 | Kyungsung University Industry Cooperation Foundation | Hybrid pole bearingless srm |
| CN203301273U (en) * | 2013-05-10 | 2013-11-20 | 东南大学 | Non bearing type half gear winding switch reluctance motor |
-
2013
- 2013-05-10 CN CN201310172403.XA patent/CN103296810B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6727618B1 (en) * | 2002-06-10 | 2004-04-27 | The United States Of America, As Represented By The Administrator Of National Aeronautics And Space Administration | Bearingless switched reluctance motor |
| WO2010137766A1 (en) * | 2009-05-28 | 2010-12-02 | Kyungsung University Industry Cooperation Foundation | Hybrid pole bearingless srm |
| CN203301273U (en) * | 2013-05-10 | 2013-11-20 | 东南大学 | Non bearing type half gear winding switch reluctance motor |
Non-Patent Citations (1)
| Title |
|---|
| DONG-HEE LEE ETC: "Modeling and Control of Novel Bearingless Switched Reluctance Motor", 《ENERGY CONVERSION CONGRESS AND EXPOSITION ,2009》, 31 December 2009 (2009-12-31) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872811A (en) * | 2014-03-17 | 2014-06-18 | 东南大学 | Bearing-less stator surface mounting type permanent magnet motor for semi-tooth winding |
| CN104821697A (en) * | 2015-04-29 | 2015-08-05 | 江苏大学 | Fault-tolerant type four-phase switch reluctance motor used for driving of electric automobile |
| CN108809031A (en) * | 2018-06-30 | 2018-11-13 | 淮阴工学院 | A kind of Three Degree Of Freedom bearing-free switch reluctance motor of constant-current source excitation |
| CN108809031B (en) * | 2018-06-30 | 2020-08-21 | 淮阴工学院 | Three-degree-of-freedom bearingless switched reluctance motor with constant current source excitation |
| CN113839592A (en) * | 2021-09-18 | 2021-12-24 | 福州大学 | Time-optimal bearingless magnetic flux switching motor torque and suspension force prediction control method |
| CN113839592B (en) * | 2021-09-18 | 2024-02-13 | 福州大学 | Time optimal bearingless magnetic flux switching motor torque and levitation force prediction control method |
| CN116365816A (en) * | 2022-11-29 | 2023-06-30 | 南京航空航天大学 | 6/4-pole bearingless doubly salient sheet motor with parallel structure and suspension control method thereof |
| CN116365816B (en) * | 2022-11-29 | 2023-12-01 | 南京航空航天大学 | 6/4-pole bearingless doubly salient sheet motor with parallel structure and suspension control method thereof |
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| CN103296810B (en) | 2015-11-18 |
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