CN104410204B - Flywheel energy storage device - Google Patents
Flywheel energy storage device Download PDFInfo
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- CN104410204B CN104410204B CN201410713995.6A CN201410713995A CN104410204B CN 104410204 B CN104410204 B CN 104410204B CN 201410713995 A CN201410713995 A CN 201410713995A CN 104410204 B CN104410204 B CN 104410204B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The invention discloses a flywheel energy storage device which is characterized in that a rotary shaft is arranged in the internal center of a vacuum container; a permanent magnetic radial bearing is embedded in the upper part of the rotary shaft; the middle and lower part of the rotary shaft are sleeved by a flywheel, a single-winding outer rotor magnetic suspension switch reluctance motor and radial and axial permanent magnet biased magnetic bearings in sequence from top to bottom; the single-winding outer rotor magnetic suspension switch reluctance motor is embedded in the inner side of the lower end of the flywheel; each set of windings is independently controlled, and radial two-degree-of-freedom suspension force can be provided in addition to electrical/power generation functions. According to the flywheel energy storage device, by utilizing the characteristic that the single-winding outer rotor magnetic suspension switch reluctance motor can directly drive the flywheel, and a high-speed self-suspension function, and organically combining the characteristics of good unloading property and controllable suspension of the axial permanent magnet bearing, the radial permanent magnet bearing and a hybrid magnetic bearing, the five-degree-of-freedom, low-loss and high-reliability suspension of the flywheel are realized, the running speed of the flywheel is increased, and the power consumption and volume of a system are reduced.
Description
Technical field
The invention belongs to electricity storage technology field, more particularly, to a kind of flywheel energy storage, be particularly well-suited to uninterrupted power source,
The fields such as Aero-Space.
Background technology
With the development in the fields such as generation of electricity by new energy, distributed power supply system, motor vehicle driven by mixed power, Aero-Space, energy storage
Technology has become international research topic.In numerous energy storage technologies, flying wheel battery is so that power is big, efficiency high, life-span length, energy storage
Density is big, cleanliness without any pollution the advantages of be subject to great attention both domestic and external.As one kind collect the technology such as machinery, control, electronics in
The energy storing devices of one, also there is many technical barriers restricting the application of its through engineering approaches in flying wheel battery, mainly find expression in outstanding at present
Bearing System Using Neural Networks, the performance of integrated form high speed/super high speed motor and control etc..For reducing supporting loss, flying wheel battery is generally adopted
With the supporting of multiple magnetic suspension bearings, increased flywheel axial length, reduce critical speed, also lead to flying wheel battery structure simultaneously
Complicated, bulky.
Using improve Speed of Reaction Wheels increase flywheel energy storage total amount approach must pull against the flywheel rim strength of materials constraint,
The technical barrier such as bearing heating and frictional resistance consumption.In recent years high strength composite and magnetic bearing technology develop into solution
An above-mentioned difficult problem provides new approaches: rotates to store energy using the composite flywheel ultrahigh speed of magnetic suspension bearing supporting under vacuum
Amount.Magnetic suspension bearing eliminates heating Problem of Failure and the frictional resistance consumption problem of conventional mechanical bearings continuous high speed operating.
The R. concomitans of this two technology make the energy storage total amount of flying wheel battery all be greatly enhanced with energy storage density.With prosperity
Country compares, and the technical merit of current China is relatively low with scale of investment, to the research of flying wheel battery also in the starting stage.Special
How to develop to be applied to aerospace flying wheel battery, domestic be even more without reference to.Although external flying wheel battery
The research of technology has made great progress. but be far from reaching the level replacing other batteries, this device to be developed, need to solve
Certainly a series of technical barrier, mainly has: flywheel rotor design, magnetic bearing technology, vacuum technique, converter technique, reasonably
Structure design etc..
And magnetic suspension motor integrates conventional motors rotation and magnetic bearing suspension function, to produce driving load simultaneously
The suspending power of electromagnetic torque and supporting rotor is target, has broken conventional motors and must keep gas only for producing electromagnetic torque
The thinking of gap magnetic field balance, opens the new direction of high-speed electric expreess locomotive research field.Magnetic suspension switched reluctance motor is by magnetic suspension skill
Art is combined with switched reluctance machines, inherit general magnetic suspension motor no rub, no abrasion, axial space utilization rate is high, turn
On the basis of the advantages of sub- critical speed is big, gives full play to the high speed superiority of switched reluctance machines and adverse circumstances have been fitted
Ying Xing, simultaneously by the active control of radial load, effectively improves the vibration that switched reluctance machines cause because of unbalanced magnetic pull
And noise problem, become the one new study hotspot in current magnetic suspension motor field.For this reason, the present invention proposes one kind with simplex winding
Mixing outer rotor magnetic suspension switched reluctance motor is the flywheel energy storage system of the supporting of core component suspension of five-freedom degree magnetic and transmission
System, it is achieved that suspension bearing system and the unification of motor, substantially reduces flywheel rotor axial length, controls cleverer
Live, improve critical speed, power density and level of integrated system, further reduce supporting loss, in high speed low damage flywheel electricity
Pond field has great research and using value.
Content of the invention
The present invention seeks to proposing a kind of energy accumulation device for fly wheel, suspension bearing is combined with driving motor, using magnetcisuspension
Floation switch reluctance motor high-speed cruising advantage and from suspension function, can improve flywheel limit speed and dynamic property, reduce supporting
Power consumption, cost and volume, reduce flywheel energy storage system running wastage, improve operational efficiency and reliability.
For achieving the above object, the technical solution used in the present invention is:
A kind of energy accumulation device for fly wheel, including vacuum tank, rotating shaft, permanent magnetic radial bearing, flywheel, simplex winding outer rotor magnetcisuspension
Floation switch reluctance motor, permanent magnetism unloading bearing, permanent magnet offset radial-axial magnetic bearing；Described vacuum tank inside center is provided with
Rotating shaft；Described rotating shaft top nested has permanent magnetic radial bearing；The middle part of described rotating shaft and bottom from top to bottom successively suit flywheel,
Simplex winding outer rotor magnetic suspension switched reluctance motor, permanent magnet offset radial-axial magnetic bearing；Described flywheel lower end inside is nested with
Simplex winding outer rotor magnetic suspension switched reluctance motor, described simplex winding outer rotor magnetic suspension switched reluctance motor is tied for outer rotor
Structure, with internal stator concentric co-axial to length, described flywheel is fixedly connected on described simplex winding outer rotor magnetic levitation switch magnetic
On the outer rotor of resistance motor；Described flywheel lower end is raised to be provided with permanent magnetism unloading bearing and vacuum tank between；Described permanent magnetism unloads
Carry bearing to match with the permanent magnet offset radial-axial magnetic bearing of rotating shaft lower end it is ensured that rotating shaft axial direction stable suspersion, provide simultaneously
The radial direction two-freedom suspension bearing of rotating shaft, described simplex winding outer rotor magnetic suspension switched reluctance motor complete radially two other
The suspension of the free degree and electronic/generating function, realize the flywheel energy storage of five-freedom degree full-suspension.
Further, described simplex winding mixing outer rotor magnetic suspension switched reluctance motor is double-salient-pole structure, equidistantly waits polar arc
Width, outer rotor equidistantly waits polar arc width, stator has 12 equal polar arc width salient pole teeth of 30 ° of settings at equal intervals, outer rotor has
8 equal polar arc width salient pole teeth of the 45 ° of settings in interval, described flywheel is directly nested on outer rotor, and described rotating shaft is from flywheel
The heart is passed and is connected with flywheel, and without mechanical driving device, rotor can directly drive flywheel.
Further, only one on each stator salient poles tooth of described simplex winding mixing outer rotor magnetic suspension switched reluctance motor
Set winding, this winding can provide torque force and suspending power simultaneously, and the 4 sets of torques/suspending windings of 90 ° of difference constitute a phase, and
Often cover winding independent control, wherein winding a1, a2, a3, a4Constitute a phase torque/suspending windings, winding b1, b2, b3, b4Constitute b phase
Torque/suspending windings, winding c1, c2, c3, c4Constitute c phase torque/suspending windings, total three-phase；Often set winding can carry simultaneously
For the suspending power of electronic torque force and rotor suspension, b1, c1It is located at a respectively1At 30 ° clockwise and 60 °, b2, c2It is located at respectively
a2At 30 ° clockwise and 60 °, b3, c3It is located at a respectively3At 30 ° clockwise and 60 °, b4, c4It is located at a respectively430 ° clockwise and
At 60 °.
Further, described permanent magnetism unloading bearing includes upper magnetic ring, lower magnet ring, silicon steel sheet, and silicon steel sheet is posted in upper magnetic ring both sides,
It is connected on flywheel, silicon steel sheet is posted in lower magnet ring both sides, is connected on vacuum tank.Have certain between upper magnetic ring and lower magnet ring
Air gap.
Further, described permanent magnetic radial bearing adopts axial magnetized or diametrical magnetization, is concentric, equal axial length
Inner and outer double-magnetic ring；Silicon steel sheet is posted in internal magnetic ring both sides, be connected in ring-shaped pressuring plate, interior ring-shaped pressuring plate is connected rotating shaft, and outer magnetic ring both sides are posted
Silicon steel sheet, be connected outer ring-shaped pressuring plate, and outer ring-shaped pressuring plate is connected vacuum tank；There is certain air gap between internal magnetic ring and outer magnetic ring.
Further, described permanent magnet offset radial-axial magnetic bearing includes: axial stator, axial control coil, bearing turn
Son, radial direction control coil, axial control coil, radial stator, permanent-magnetic clamp；Axial stator is connected vacuum tank, axially controls for two
Coil processed is connected in inside axial stator, and radial stator is circumferentially uniformly distributed for 90 °, and the equal lap wound of each radial stator radially controls
Coil, permanent-magnetic clamp radial magnetizing is embedded in the junction of axial stator and radial stator, leaves between bearing rotor and radial stator
Radial air gap, leaves axial air-gap between bearing rotor and axial stator；Two axial control coils, four radial direction control coils
Winding all leads to direct current.
Compared with prior art, the invention has the beneficial effects as follows:
(1) axial length shortening, compact conformation
This device adopts simplex winding mixing outer rotor magnetic suspension switched reluctance motor, and motor is outer rotor, default minor structure,
Rotor can directly drive flywheel, can save mechanical driving device, reduces rotating shaft axial length, and structure is compacter.Permanent magnetism simultaneously
The connected flywheel of unloading bearing and vacuum tank, further reduce device axial length.
(2) reduce system power dissipation
Replace traditional mechanical replacement bearing using permanent magnetic radial bearing, realize axially unloading using permanent magnetism unloading bearing,
Hybrid magnetic bearing only need to overcome rotating shaft residuals weight and dynamic loading, unload bearing and hybrid magnetic bearing using permanent magnetism simultaneously and utilize
Magnetic suspension switched reluctance motor is realized flywheel rotating shaft five degree of freedom high speed low-loss and is entirely suspended, reduce device electromagnetic power consumption and
Mechanical friction is lost.
(3) firm in structure, suitable high-speed cruising
The structure of whole device is simple, and especially rotor no permanent magnet is only magnetic conductive iron, structure simple rigid, is easy to height
Speed, ultrahigh speed are run, and are conducive to improving the limit speed of flywheel, and then improve the stored energy capacitance of this flywheel energy storage system.
Brief description
Fig. 1 is the structural representation of simplex winding outer rotor magnetic suspension switched reluctance motor energy accumulation device for fly wheel；
Fig. 2 is simplex winding mixing outer rotor magnetic suspension switched reluctance motor structural representation；
Fig. 3 unloads bearing arrangement schematic diagram for permanent magnetism；
Fig. 4 is permanent magnetic radial bearing arrangement schematic diagram；
Fig. 5 is permanent magnet offset radial-axial magnetic bearing structural representation；
Fig. 6 is permanent magnet offset radial-axial magnetic bearing axial magnetic circuit schematic diagram；
Fig. 7 is permanent magnet offset radial-axial magnetic bearing radial magnetic circuit schematic diagram.
In figure: 1- vacuum tank；2- rotating shaft；3- permanent magnetic radial bearing；4- flywheel；5- simplex winding outer rotor magnetic levitation switch
Reluctance motor；6- permanent magnetism unloads bearing；7- permanent magnet offset radial-axial magnetic bearing；301- internal magnetic ring；302- silicon steel sheet；303-
Interior ring-shaped pressuring plate；The outer ring-shaped pressuring plate of 304-；305- outer magnetic ring；501- rotor；502- stator；503- winding；601- upper magnetic ring；Under 602-
Magnet ring；603- silicon steel sheet；701- axial stator；702- axial direction control coil；703- axial air-gap；704- radial air gap；705-
Bearing rotor；706- control coil；707- radial stator；708- permanent-magnetic clamp.
Specific embodiment
Further illustrate the specific embodiment of the present invention below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention includes vacuum tank 1, rotating shaft 2, permanent magnetic radial bearing 3, flywheel 4, simplex winding outer rotor
Magnetic suspension switched reluctance motor 5, permanent magnetism unloading bearing 6, permanent magnet offset radial-axial magnetic bearing 7.Permanent magnetic radial bearing 3 is nested
In the upper end of rotating shaft 2, play the effect of replacement bearing.Rotating shaft lower end is set with flywheel 4, simplex winding outer rotor magnetic levitation switch successively
Reluctance motor 5, permanent magnet offset radial-axial magnetic bearing 7, flywheel 4 is connected simplex winding outer rotor magnetic suspension switched reluctance motor
Outer rotor.It is installed between flywheel 4 lower end and vacuum tank 1, for unloading the most axle of flywheel rotating shaft on permanent magnetism unloading axle 6
To weight.Permanent magnet offset radial-axial magnetic bearing 7 cooperation permanent magnetism unloading bearing of rotating shaft 2 lower end overcomes flywheel rotating shaft residual gravity
Amount and dynamic loading, it is ensured that axial stable suspersion, provide the radial direction two-freedom suspension bearing of rotating shaft simultaneously.Simplex winding outer rotor magnetic
Suspension switched reluctance machines 5 complete the radially suspension of two other free degree and electronic/generating function, realize five degree of freedom and entirely hang
Floating energy accumulation device for fly wheel.
As shown in Fig. 2 simplex winding outer rotor magnetic suspension switched reluctance motor 5 of the present invention is extremely outer for three-phase 12/8
Rotor, inner stator biconvex structure, between permanent magnet offset radial-axial magnetic bearing 7 and permanent magnetic radial bearing 3, including rotor
501, stator 502, winding 503.Stator 502 inside rotor 501, both concentric co-axial.Rotor 501 is connected flywheel 4, flywheel 4
Connected rotating shaft 2.Rotating shaft 2 passes from flywheel center.Radial air gap is stayed between rotor 501 and stator 502.Winding 503 lap wound
On motor stator 502, taking a phase as a example, wherein winding a1, a2, a3, a4Constitute a phase torque/suspending windings, apply electric current respectively
ia1、ia2、ia3、ia4, wherein ia1=ima1+isa1, ia2=ima2+isa2, ia3=ima3+isa3, ia4=ima4+isa4.ia1Component
ima1For torque current, according to magnetic resistance minimum principle, that is, magnetic flux, always along the path closure that magnetic resistance is minimum, pulls rotor 501
Rotation.ia1Component isa1For levitating current, by adjusting isa1, isa2, isa3, isa4Size realize simplex winding outer rotor magnetcisuspension
Floation switch reluctance motor 5 radial direction two-freedom suspends.Winding b1, b2, b3, b4Constitute b phase torque/suspending windings.Winding c1, c2,
c3, c4Constitute c phase torque/suspending windings, have 3 phases.Often set winding can provide electronic torque force and rotor suspension simultaneously
Suspending power.b1, c1It is located at a respectively1At 30 ° clockwise and 60 °, b2, c2It is located at a respectively2At 30 ° clockwise and 60 °, b3, c3Respectively
Positioned at a3At 30 ° clockwise and 60 °.b4, c4It is located at a respectively4At 30 ° clockwise and 60 °.Often cover winding independent control, Ke Yitong
When torque and suspending power are provided.During rotor 501 rotation, the flywheel 4 that direct drive is connected, realize energy storage.
As shown in figure 3, permanent magnetism unloading bearing 6 of the present invention includes: upper magnetic ring 601, lower magnet ring 602, silicon steel sheet
603.Magnet ring material typically using but be not limited to rare earth material NdFeB material.It is solid that silicon steel sheet 603 is sticked in upper magnetic ring 601 both sides
Even flywheel 4, can be rotated together with flywheel 4.Lower magnet ring 602 both sides are sticked silicon steel sheet 603 and are connected vacuum tank 1.Upper magnetic ring 601 with
Lower magnet ring 602 using but be not limited to axial charging, magnetizing direction is contrary.Realize axial weight using the repulsion between two magnet rings
Unloading.It should be understood that axially stacking, magnet ring is carried out using multipair magnet ring for obtaining bigger rigidity and the bearing capacity present invention
Silicon steel sheet is sticked in both sides, and magnetic flux concentrates Radial Flow thus increasing radial magnetic flux density to reduce leakage field in silicon steel sheet.
As shown in figure 4, permanent magnetic radial bearing 3 of the present invention is located at rotating shaft 2 upper end, including internal magnetic ring 301, silicon steel
Piece 302, interior ring-shaped pressuring plate 303, outer ring-shaped pressuring plate 304, outer magnetic ring 305.Ring-shaped pressuring plate 303 in internal magnetic ring 301 is connected, interior ring-shaped pressuring plate 303
Connected rotating shaft 2, internal magnetic ring 301 can be rotated together with rotating shaft 2.Outer magnetic ring 301 is connected outer ring-shaped pressuring plate 304, and outer ring-shaped pressuring plate 304 is connected
Vacuum tank 1.Magnet ring material typically using but be not limited to rare earth material neodymium iron boron material.Outer magnetic ring 305 is general with internal magnetic ring 301
But it is not limited to axial charging, magnetizing direction is contrary, using the repulsion between two magnet rings, rotating shaft 2 is fixed on equilbrium position.Two
Person's concentric co-axial is to length.It should be understood that silicon steel sheet silicon steel sheet 302 is sticked in magnet ring both sides, magnetic flux is concentrated in silicon steel sheet
Radial Flow reduces leakage field thus increasing radial magnetic flux density.
As shown in figure 5, permanent magnetic radial bearing permanent magnet offset radial-axial direction 7 of the present invention is located at rotating shaft 2 lower end,
Including axial stator 701, axial control coil 702, bearing rotor 705, radial direction control coil 706, axial control coil 702,
Radial stator 707, permanent-magnetic clamp 708.The axial stator 701 axial control coils 702 of vacuum tank 1,2 that are connected are connected axial stator
701, radial stator 707 is circumferentially uniformly distributed for 90 degree, each equal lap wound radial direction control coil 706 of radial stator 707, permanent-magnetic clamp
708 radial magnetizings are embedded in axial stator 701 and the junction of radial stator 707, between bearing rotor 705 and radial stator 707
Leave radial air gap 704, between bearing rotor 705 and axial stator 701, leave axial air-gap 703.Axial control coil 702 line
The control coil that circle is connected as associated freedom by two opposed respectively coils of radial direction.2 axial control coils 702,4
Radial direction control coil 706 winding all leads to direct current.Axial stator 701 is formed using silicon steel plate stacking with radial stator 707, permanent magnetism
Ring 708 general using but be not limited to rare earth material NdFeB material, and radial magnetizing.When radial-axial all stable suspersions,
Rotating shaft 2 is in the centre position of suspension under the magnetostatic field suction that permanent-magnetic clamp 708 produces.
Fig. 6 is the magnetic circuit figure of axial magnetic bearing, in figure фpmIt is the quiescent biasing magnetic flux that permanent-magnetic clamp 708 produces, фzemIt is axle
The control magnetic flux that electric current produces in control coil 702, air-gap flux is synthesized by this two parts magnetic flux.When axial stable suspersion
When, magnetic bearing rotor is in the centre position of suspension under the magnetostatic field suction that permanent magnet produces, and being also referred to as this position is ginseng
Examine position.Due to the symmetry of structure, the air gap z on the rotor right side for the magnetic flux that permanent magnet produces1Place and the gas on the rotor left side
Gap z2Place is equal, and now left and right suction is equal.If rotor is subject to the outer power of disturbing to the right when this equilbrium position, turn
Son can deviate from reference position and moves right, and causes the flux change of the left and right air gap of permanent magnet generation (to assume radially flat
Weighing apparatus position), that is, the air gap on the left side increases, and makes the magnetic flux φ that permanent magnet producespmz2Reduce, the air gap on the right side reduces, and makes permanent magnet
The magnetic flux φ producingpmz1Increase.Because the power of disturbing makes rotor move right outward, now sensor detects that rotor deviates its reference bit
The displacement put, this displacement signal is transformed into control signal by controller, and this control signal is transformed into by power amplifier again
Control electric current, this electric current makes to produce electromagnetism magnetic flux ф in iron core through electromagnet coil windingzem, in the z on the rotor left side2Place by
Flowing to of magnetic flux and permanent magnet flux is identical, with permanent magnet flux φpmz2Superposition, makes air gap z2Locating total magnetic flux increases, i.e. φz2
=φpmz2+фzem；Magnetic flux фzemIn right side air gap z2Place, due to permanent magnet flux φpmz1Flow direction contrary, therefore in air gap
z1The total magnetic flux at place is reduced to φ z1=φpmz1-фzem.Therefore, no matter rotor is subject to z positive direction or the outer of z negative direction to disturb
Dynamic, band position degenerative permanent-magnetic biased axial magnetic bearing system, its rotor controls the electric current in Exciting Windings for Transverse Differential Protection by controller,
Adjust the size of left and right air-gap flux, rotor can be kept all the time in equilbrium position.
Fig. 7 is the magnetic circuit figure of radial direction magnetic bearing, and in figure designates the path of x direction magnetic flux, фpmIt is that permanent-magnetic clamp (708) produces
Raw quiescent biasing magnetic flux, фxemIt is the control magnetic flux in x direction, the path of y direction magnetic flux can be indicated with same method.Footpath
Identical with axial suspension principle to suspension theory.
The present invention relates to a kind of flywheel energy storage, energy accumulation device for fly wheel rotating shaft 2 upper end is installed permanent magnetic radial bearing, be instead of biography
Mechanical replacement bearing in system flywheel gear, can solve the problems, such as the energy loss leading to because of bearing friction, work as magnetic suspension motor
During normal work, Permanent-magnet bearing can share motor radial load as replacement bearing；When motor does not work, can conduct
Two degrees of freedom journal bearing, realizes rotating shaft two-freedom and suspends.Permanent magnetism unloading bearing 6 is connected flywheel 4 and vacuum tank 1, realizes
The axial weight unloading of flywheel energy storage system.Rotating shaft lower end overcomes flywheel rotating shaft to remain using permanent magnet offset radial-axial magnetic bearing
Remaining weight and dynamic loading, it is ensured that flywheel rotating shaft axial direction stable suspersion, provide flywheel rotating shaft radial direction two-freedom suspension bearing simultaneously,
The outer rotor of simplex winding outer rotor magnetic suspension switched reluctance motor 5 can directly drive flywheel, saves mechanical driving device, structure
Compact, realize high-speed rotation energy storage；Often cover winding independent control, in addition to electronic/generating function, radial direction two can be provided simultaneously
Free degree suspending power.The present invention can directly drive flywheel feature and height using simplex winding outer rotor magnetic suspension switched reluctance motor
Speed, from suspension function, organically combines permanent magnetism cod, and permanent magnetic radial bearing and hybrid magnetic bearing unload by force controllable suspension feature,
Achieve flywheel five degree of freedom low-loss, highly reliable suspension, and improve the flywheel speed of service, reduce system power dissipation and volume.
Illustrate the present invention already in connection with specific implementation step above, but for a person skilled in the art, can
, on the premise of without departing substantially from the spirit and scope of the present invention, the present invention is made with different improvement and modification.Thus fall into this
Various modifications and variations in the right of invention, all should belong within protection scope of the present invention.
Claims (6)
1. a kind of energy accumulation device for fly wheel it is characterised in that: include vacuum tank (1), rotating shaft (2), permanent magnetic radial bearing (3), fly
Wheel (4), simplex winding outer rotor magnetic suspension switched reluctance motor (5), permanent magnetism unloading bearing (6), permanent magnet offset radial-axial direction magnetic axis
Hold (7)；
Described vacuum tank (1) inside center is provided with rotating shaft (2)；
Described rotating shaft (2) top nested has permanent magnetic radial bearing (3)；
The middle part of described rotating shaft (2) and bottom are set with flywheel (4), simplex winding outer rotor magnetic levitation switch magnetic resistance from top to bottom successively
Motor (5), permanent magnet offset radial-axial magnetic bearing (7)；
Described flywheel (4) lower end inside is nested with simplex winding outer rotor magnetic suspension switched reluctance motor (5), turns outside described simplex winding
Sub- magnetic suspension switched reluctance motor (5) is outer rotor (501) structure, to length, described with internal stator (502) concentric co-axial
Flywheel (4) is fixedly connected on the outer rotor of described simplex winding outer rotor magnetic suspension switched reluctance motor (5)；Described flywheel (4)
Lower end is raised to be provided with permanent magnetism unloading bearing (6) and vacuum tank (1) between；
Permanent magnet offset radial-axial magnetic bearing (7) that described permanent magnetism unloads bearing (6) same to rotating shaft (2) lower end matches it is ensured that turning
Axle (2) axial direction stable suspersion, provides the radial direction two-freedom suspension bearing of rotating shaft (2), described simplex winding outer rotor magnetcisuspension simultaneously
Floation switch reluctance motor (5) completes the radially suspension of two other free degree and electronic/generating function, realizes five degree of freedom and entirely hangs
Floating flywheel energy storage.
2. as claimed in claim 1 a kind of energy accumulation device for fly wheel it is characterised in that: described simplex winding mixing outer rotor magnetic suspension is opened
Closing reluctance motor (5) is double-salient-pole structure, the polar arc width such as equidistant, and outer rotor (501) is equidistant to wait polar arc width, and stator has on (502)
12 equal polar arc width salient pole teeth of 30 ° of settings at equal intervals, outer rotor (501) has 8 equal polar arc width of the 45 ° of settings in interval
Salient pole tooth, described flywheel (4) is directly nested on outer rotor (501), described rotating shaft (2) from flywheel (4) center pass and with fly
Wheel (4) is connected, and without mechanical driving device, rotor can directly drive flywheel (4).
3. as claimed in claim 1 or 2 a kind of energy accumulation device for fly wheel it is characterised in that: described simplex winding mixing outer rotor magnetcisuspension
A set of winding (503) is only had on each stator salient poles tooth of floation switch reluctance motor (5), this winding (503) can provide simultaneously
Torque force and suspending power, 4 sets of torque/suspending windings (503) of 90 ° of difference constitute a phase, and often cover winding independent control, wherein
Winding a1, a2, a3, a4Constitute a phase torque/suspending windings, winding b1, b2, b3, b4Constitute b phase torque/suspending windings, winding c1,
c2, c3, c4Constitute c phase torque/suspending windings, total three-phase；Often set winding can provide electronic torque force and rotor to hang simultaneously
Floating suspending power, b1, c1It is located at a respectively1At 30 ° clockwise and 60 °, b2, c2It is located at a respectively2At 30 ° clockwise and 60 °, b3, c3
It is located at a respectively3At 30 ° clockwise and 60 °, b4, c4It is located at a respectively4At 30 ° clockwise and 60 °.
4. as claimed in claim 1 a kind of energy accumulation device for fly wheel it is characterised in that: magnetic in unloading bearing (6) inclusion of described permanent magnetism
Ring (601), lower magnet ring (602), silicon steel sheet (603), silicon steel sheet (603) is posted in upper magnetic ring (601) both sides, is connected in flywheel (4)
On, silicon steel sheet (603) is posted in lower magnet ring (602) both sides, is connected on vacuum tank (1), upper magnetic ring (601) and lower magnet ring
(602) there is certain air gap between.
5. as claimed in claim 1 a kind of energy accumulation device for fly wheel it is characterised in that: described permanent magnetic radial bearing (3) is using axially
Magnetization or diametrical magnetization, are concentric, the inner and outer double-magnetic ring of equal axial length；Silicon steel sheet is posted in internal magnetic ring (301) both sides
(302), be connected in ring-shaped pressuring plate (303), interior ring-shaped pressuring plate (303) is connected rotating shaft (2), and silicon steel sheet is posted in outer magnetic ring (305) both sides
(302), be connected outer ring-shaped pressuring plate (304), and outer ring-shaped pressuring plate (304) is connected vacuum tank (1)；Internal magnetic ring (301) and outer magnetic ring (305)
Between have certain air gap.
6. as claimed in claim 1 a kind of energy accumulation device for fly wheel it is characterised in that: described permanent magnet offset radial-axial magnetic bearing
(7) include: axial stator (701), axial control coil (702), bearing rotor (705), radial direction control coil (706), axial direction
Control coil (702), radial stator (707), permanent-magnetic clamp (708)；Axial stator (701) is connected vacuum tank (1), two axial directions
Control coil (702) is connected in inside axial stator (701), and radial stator (707) is circumferentially uniformly distributed for 90 °, and each is radially
Stator (707) all lap wounds radial direction control coil (706), permanent-magnetic clamp (708) radial magnetizing is embedded in axial stator (701) and radially determines
The junction of sub (707), leaves radial air gap (704), bearing rotor between bearing rotor (705) and radial stator (707)
(705) leave axial air-gap (703) and axial stator (701) between；Two axial control coils (702), four radially control
Coil (706) winding all leads to direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713995.6A CN104410204B (en) | 2014-11-28 | 2014-11-28 | Flywheel energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713995.6A CN104410204B (en) | 2014-11-28 | 2014-11-28 | Flywheel energy storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104410204A CN104410204A (en) | 2015-03-11 |
| CN104410204B true CN104410204B (en) | 2017-01-18 |
Family
ID=52647808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410713995.6A Active CN104410204B (en) | 2014-11-28 | 2014-11-28 | Flywheel energy storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104410204B (en) |
Cited By (1)
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| CN110112860B (en) * | 2019-04-22 | 2020-11-03 | 江苏大学 | Five-freedom-degree single-side suspension supporting type disc ball flywheel integrated vehicle-mounted energy storage device |
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