CN106655605B - Sandwich magnetic suspending flying wheel battery for electric vehicle and working method - Google Patents
Sandwich magnetic suspending flying wheel battery for electric vehicle and working method Download PDFInfo
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- CN106655605B CN106655605B CN201611242637.7A CN201611242637A CN106655605B CN 106655605 B CN106655605 B CN 106655605B CN 201611242637 A CN201611242637 A CN 201611242637A CN 106655605 B CN106655605 B CN 106655605B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The present invention discloses a kind of sandwich magnetic suspending flying wheel battery for electric vehicle and working method, internal vacuum chamber centre is vertical shaft, the axial middle of vertical shaft is coaxially disposed web-type flywheel motor, the surface of web-type flywheel motor and underface are each coaxial equipped with a structure is identical, is arranged symmetrically down in the axial direction relative to web-type flywheel motor and dish type magnetic bearing of the empty set outside vertical shaft, are wound with one group of radial direction control coil on each dish type magnetic bearing；Web-type flywheel motor by a stator, two rotors and two groups of set of permanent magnets at, stator is located at the middle of web-type flywheel motor and coaxial empty set outside vertical shaft, and 2 rotors are symmetrically arranged the two sides up and down in stator and are coaxially fixedly attached on vertical shaft；2 rotors are along one group of permanent magnet is along the circumferential direction posted on the surface for facing away from stator, and the overall structure of flying wheel battery is tray type structure, and disc type magnetic bearing and web-type flywheel motor are flat structure, inhibit the gyroscopic effect of rotor.
Description
Technical field
The present invention relates to flying wheel battery (also referred to as energy accumulation device for fly wheel) field, especially a kind of magnetcisuspensions for electric car
Suspension flywheel battery.
Background technique
Magnetic suspending flying wheel battery is efficient one kind, cleaning, is suitble to movement, stores the secondary of electric energy to store mechanical energy replacement
Electric discharge device.It stores energy using discontiguous rotary flyweights, has high-specific-power and specific energy, fast, the high revolving speed of charging, longevity
Life length and advantages of environment protection, are widely used in the fields such as communications and transportation, aerospace, electric power energy.
The working principle of magnetic suspending flying wheel battery are as follows: magnetic suspending flying wheel battery is defeated from outside using power electronics conversion equipment
Enter the rotation of electrical energy drive motor, motor drives flywheel rotor rotation, flywheel store kinetic energy (mechanical energy), when external loading needs
When wanting energy, generator rotation is driven with flywheel, is converted the kinetic energy into electrical energy, to meet the needs of different.Magnetically levitated flywheel electricity
The topological structure in pond is mainly made of vacuum chamber, flywheel rotor, motor/generator, magnetic bearing and protection bearing etc..Flywheel electricity
Cell system is typically placed in the sealed enclosure of high vacuum, thin although can reduce windage loss by improving vacuum degree
Gaseous environment makes system radiating miopragia, and the temperature of rotor is caused easily to increase.In addition, the idling consumption of flying wheel battery is high
(self-discharge rate is high), such as stops charging, and the energy of flying wheel battery storage can voluntarily exhaust within a few to tens of hours.Flywheel electricity
The work of pond most of the time is in high speed " standby " state, therefore the bearing of flying wheel battery and transmission system should have both low-loss, height
The characteristics of reliability.Furthermore for flywheel in vehicle battery, automobile difference driving status and the condition of road surface travelled be will lead to
The generation of gyroscopic effect, so bearing must bear gyro power other than bearing the self weight of flywheel rotor.It is multiple especially as road conditions
The increase of miscellaneous degree causes gyroscopic effect more obvious, so that flywheel rotor system easily unstability.Therefore magnetic suspension for electric vehicle
Flying wheel battery system should have both the characteristics of good heat dissipation, low-loss, high reliability.
The flying wheel battery topological structure of the prior art generallys use active/passive/hybrid magnetic bearing bearing vertical spindle, then
Radial air gap structure type motor is equipped with to realize suspension bearing and the transmission of flywheel rotor, therefore the suspension bearing of the prior art
The selection mode of mode and motor, which becomes the whole topological mode group of flying wheel battery, axis tree, and gyroscopic effect can not be kept away
Exempt from.And with energy shortages, the increase of road conditions complexity causes the gyroscopic effect of vehicle-mounted flying wheel battery more obvious, so that
Flywheel rotor easily unstability.In addition to this, using conventional maglev support pattern (active/passive/hybrid magnetic bearing) although energy
The suspension bearing power of flying wheel battery stable operation is enough provided, but it is big etc. to be respectively present bearing loss height, Lack of support, volume
Disadvantage, and such flying wheel battery topological structure is used, heat dissipation performance is never improved.In addition, the prior art flies
Motor used by wheel battery mostly uses traditional radial air gap structure type, while in order to reduce the magnetic resistance of magnetic circuit, selecting high
The silicon steel sheet stack of magnetic conductivity is pressed into iron core, and the presence of iron core results in that motor volume is big, weight is big, loss is big, vibration
The problems such as noise is big, and then cause flying wheel battery idling consumption big.Therefore, the overall topology of flying wheel battery how is improved,
That is design Novel suspending bearing topological structure and electric machine structure, for improving flying wheel battery gyroscopic effect, weak heat-dissipating and standby damage
Consuming big etc. is current magnetic suspending flying wheel battery field for electric vehicle urgent problem to be solved.
Summary of the invention
It is small the purpose of the present invention is providing a kind of good heat dissipation, idling consumption to solve the above problems existing in the prior art
And can effectively inhibit the sandwich of gyroscopic effect magnetic suspending flying wheel battery for electric vehicle, the present invention also provides the flywheel simultaneously
The working method of battery.
Sandwich magnetic suspending flying wheel battery for electric vehicle of the present invention, which solves technical solution used by its technical problem, is:
Including the vacuum chamber surrounded by top end cover, bottom head covers and drum, internal vacuum chamber centre is vertical shaft, vertical shaft
One top of the coaxial empty set of tip exterior protection bearing, one lower part of bottom end outer, coaxial empty set protect bearing, vertical shaft
Axial middle be coaxially disposed web-type flywheel motor, the surface and underface of web-type flywheel motor are each coaxial equipped with a knot
Structure is identical, is arranged symmetrically down in the axial direction relative to web-type flywheel motor and dish type magnetic bearing of the empty set outside vertical shaft, often
One group of radial direction control coil is wound on a dish type magnetic bearing；The web-type flywheel motor is by a stator, two rotors and two groups
Set of permanent magnets is at stator is located at the middle of web-type flywheel motor and coaxial empty set outside vertical shaft, and 2 rotors are respectively symmetrically
It is arranged in the two sides up and down of stator and is coaxially fixedly attached on vertical shaft；2 rotors are equal on the surface for facing away from stator
One group of permanent magnet is along the circumferential direction posted, one group of permanent magnet is made of four identical annular permanent magnets, four annular permanent magnets
Body is arranged in annular shape in such a way that the pole N, S are extremely end to end,
The outer diameter of web-type flywheel motor is 2R, and R is the radius of web-type flywheel motor, the outer diameter of two rotors, two dish types
The circular outer diameter that the outer diameter and permanent magnet of magnetic bearing are arranged in is 2R, and the outer diameter of stator is less than 2R, web-type flywheel
The ratio of the axial height of motor and its radius R are 1:10, axial maximum height and radius R between two dish type magnetic bearings
Ratio be 3:5.
The working method of sandwich magnetic suspending flying wheel battery for electric vehicle of the present invention the technical solution adopted is that include with
Lower step:
A, floating is realized by two dish type magnetic bearings controls, two rotors, after two rotors rise and float to center, outside
Boundary's electrical energy drive web-type flywheel motor accelerates rotation, and web-type flywheel motor makees motor use；
B, two rotors, which reach, provides low pressure by external power electronic device after certain revolving speed and maintains revolving speed, two dish type magnetic
Two rotor stabilities of bearing control suspend；
C, two groups of radial direction control coil power-off are controlled, two rotors apply torque, defeated to peripheral hardware by power electronic equipment
Electric energy out, two rotor speeds constantly decline, and web-type flywheel motor makees generator use.
The beneficial effect of the present invention compared with prior art is:
1, the overall topology of flying wheel battery is designed as tray type structure by the present invention, by disc type magnetic bearing and web-type flywheel
Motor is both designed as flat structure, hence it is evident that the axial length of vertical shaft is shortened, so that the topological structure of entire fly wheel system is in
Existing flat, this axial dimension is significantly less than the flying wheel battery topological structure that radial dimension of flat dish type is intended to " shaftless ",
The tree-shaped flying wheel battery for having axis topological structure in the prior art is avoided with strong gyroscopic effect, is conducive to inhibit magnetcisuspension
The gyroscopic effect of suspension flywheel rotor.
2, due to flying wheel battery, radiating rate is slower in vacuum environment, and the variation of thermal field is to system job stability
It is affected, sandwich flying wheel battery structure designed by the present invention has big air gap, stray loss can be made to reduce, and saves energy
Source increases radiating rate, reduces winding temperature rise, improves efficiency.
3, suspension bearing structure is designed as sandwich dish type magnetic axis made of two disc type bearing combinations up and down by the present invention
It holds, and thus web-type flywheel motor provisioned in bearing arrangement and air gap uses non iron-core desk permanent-magnet brshless DC motor, nothing
Loss, excitation copper loss and the basic iron loss of mechanical commutator, therefore no-load loss can also greatly reduce, and greatly reduce power train
The energy loss of the energy loss of system, especially flying wheel battery in the standby state.
4, a set of control coil of the present invention forms the rotating excitation field (rotation that logical three-phase alternating current generates that number of pole-pairs is 1
Magnetic field), with permanent magnet generate number of pole-pairs be 2 rotating excitation field (mechanical rotating excitation field) interact, only with it is a set of around
Five-degree magnetic suspension bearing (active control of radial two degrees of freedom, remaining Three Degree Of Freedom of flying wheel battery system can be realized in group
Control stablizes passive control since special construction of the invention realizes), the energy loss of supporting system is greatly reduced, it is special
It is not the energy loss of flying wheel battery in the standby state, improves the energy storage efficiency of flying wheel battery, and ensure that vehicle-mounted fly
Battery is taken turns in the stable suspersion of five degree of freedom, it is suppressed that gyroscopic effect.
Detailed description of the invention
Fig. 1 is the schematic perspective view of sandwich of the present invention magnetic suspending flying wheel battery for electric vehicle；
Fig. 2 is the axial sectional view of Fig. 1；
Fig. 3 is the structural exploded view of the middle and upper part Fig. 1 and lower part dish type magnetic bearing；
Fig. 4 is the radial torsion two degrees of freedom suspension theory figure of magnetic suspending flying wheel battery shown in Fig. 1；
Fig. 5 is the axial suspension schematic diagram of magnetic suspending flying wheel battery shown in Fig. 1；
Fig. 6 is the radial two degrees of freedom suspension theory figure of magnetic suspending flying wheel battery shown in Fig. 1.
In figure: 1. web-type flywheel motors；11. stator；121. upper rotor；122. lower rotor；131. upper permanent magnets；
132. lower permanent magnet；21. top air gap；22. lower part air gap；31. top dish type magnetic bearing；311,312,313. top dish type
The convex magnetic pole of magnetic bearing；32. lower part dish type magnetic bearing；321, the convex magnetic pole of 322,323. lower part dish type magnetic bearings；41,
42. control coil；411,412,413. top radial direction control coil；421,422,423. lower part radial direction control coil；5. vertical
Shaft；61. bearing is protected on top；62. bearing is protected in lower part；7. vacuum chamber；71. top end cover；72. bottom head covers；73. circle
Bucket；81,82,83,84. connector.
Specific embodiment
As depicted in figs. 1 and 2, sandwich of the present invention magnetic suspending flying wheel battery for electric vehicle has a vacuum chamber 7, very
Empty room 7 is the vacuum chamber surrounded by top end cover 71, bottom head covers 72 and drum 73, wherein the center of top of drum 73 and bottom
Portion center is respectively opening, and center of top opening is sealed with top end cover 71 and fixed, bottom center opening bottom head covers 72
Sealing is fixed.1 identical dish type magnetic bearing of 1,1, web-type flywheel motor vertical shaft 5,2 is equipped with inside vacuum chamber 7
31、32。
7 inside centre of vacuum chamber is vertical shaft 5, the central axis of vertical shaft 5 and the center overlapping of axles of vacuum chamber 7,
Bearing 61 is protected on one top of the coaxial empty set of the tip exterior of vertical shaft 5, and top protects bearing 61 solid with connector 81 simultaneously
It is scheduled on the middle position of top end cover 71, top protection bearing 61 belongs to radial-axial auxiliary bearing, using angular contact ball axis
It holds, axial direction, radial air gap 0.25mm between vertical shaft 5.Under the bottom end outer, coaxial empty set one of vertical shaft 5
Portion protects bearing 62, and lower part protects bearing 62 in the middle position of bottom head covers 72, and lower part protects bearing 62 simultaneously with connector
82 are fixed in bottom head covers 72, and lower part protection bearing 62 belongs to radial auxiliary bearing, using deep groove ball bearing, with vertical turn
Radial air gap between axis 5 is 0.25mm.
The axial middle of vertical shaft 5 is coaxially disposed web-type flywheel motor 1, in the surface, just of web-type flywheel motor 1
Lower section is respectively co-axially mounted a dish type magnetic bearing, is the top dish type magnetic bearing 31 right above web-type flywheel motor 1 respectively
With the lower part dish type magnetic bearing 32 of underface, top dish type magnetic bearing 31 is located at the axial underface of top protection bearing 61, under
Portion's dish type magnetic bearing 32 is located at the surface of lower part protection bearing 62,32 knot of top dish type magnetic bearing 31 and lower part dish type magnetic bearing
Structure is identical, and is arranged symmetrically down in the axial direction relative to web-type flywheel motor 1, by be it is mirror-symmetrical in a manner of positioned at disc type fly
The axial sides of turbin generator 1.Top dish type magnetic bearing 31 and the coaxial empty set of lower part dish type magnetic bearing 32 are outside vertical shaft 5, together
When top dish type magnetic bearing 31 and lower part dish type magnetic bearing 32 side wall of drum 73 is fixedly connected on a connector 83 respectively
On.Connector 8,82,83 can be using welding or thread connecting mode connection.In this way, vertical shaft 5 is coaxially placed in simultaneously
It protects among bearing 61, lower part protection bearing 62, top dish type magnetic bearing 31 and lower part dish type magnetic bearing 32 on top.Top dish type
Axial top air gap 21 is formed between 1 upper surface of magnetic bearing 31 and web-type flywheel motor, lower part dish type magnetic bearing 32 and disc type fly
Axial lower part air gap 22 is formed between 1 lower surface of turbin generator, top air gap 21 and lower part air gap 22 are the cylindrical airs of 2mm
Layer, two air gaps can not only be used for axial air-gap but also as radial air gap.
Web-type flywheel motor 1 uses birotor non iron-core disc type electric machine, by 11, two rotors of a stator and two groups of permanent magnetism
Body composition.Web-type flywheel motor 1 uses intermediate stator structure, and stator 11 is located at the middle of web-type flywheel motor 1, coaxial empty set
Outside vertical shaft 5, stator 11 is fixedly connected with the side wall of drum 73 with connector 84.2 rotors are located at about 11 stator
Two sides are upper rotor 121 and lower rotor 122 respectively, and upper rotor 121 is with lower rotor 122 relative to stator 11 with mirror
Face symmetric mode axially symmetric disposition.Upper rotor 121 and lower rotor 122 are coaxially fixedly attached on vertical shaft 5, and vertical
Formula shaft 5 rotates jointly.Rotor is both the flywheel of rotor and flying wheel battery.
2 rotors on the surface that facing away from stator 11, along the circumferential direction with patch form post four it is identical
One group of permanent magnet that annular surrounds, one group of permanent magnet are made of four identical annular permanent magnets, the upper table of upper rotor 121
It is identical close to four on one group of upper permanent magnets 131 of four identical annulars, the lower surface of lower rotor 122 on face
One group of upper permanent magnets 132 of annular.One group of four permanent magnet on each rotor of upper rotor 121 and lower rotor 122
131,132 annular shape is arranged in the extremely end to end alternation method of the pole N, S.
The outer diameter of web-type flywheel motor 1 is 2R, and R is the radius of web-type flywheel motor 1.Upper rotor 121, lower rotor
122 outer diameter, top dish type magnetic bearing 31, lower part dish type magnetic bearing 32 outer diameter and upper permanent magnets 131, lower permanent magnet
The outer diameter of 132 annular shapes being arranged in is all identical, is 2R.The outer diameter 2r of stator 11 is slightly less than 2R, and r is the half of stator 11
Diameter.But the internal diameter of drum 73 is greater than 2R.The ratio of the axial height h and its radius R of web-type flywheel motor 1 are 1:10.Upper disc
Axial maximum height between shape magnetic bearing 31 and lower part dish type magnetic bearing 32 is H, i.e. the upper surface of top dish type magnetic bearing 31
Height between the axial direction of the lower surface of lower part dish type magnetic bearing 32 is that the ratio of H, height H and radius R are 3:5.So that whole
A flying wheel battery meets its polar moment of inertia/equatorial moment of inertia between 1.4~2 at flat structure, and gyro effect can be effectively suppressed
It answers.
As shown in figure 3, the shape of top dish type magnetic bearing 31 and lower part dish type magnetic bearing 32 is hollow cylindric, and
Each magnetic bearing has three identical convex magnetic poles being distributed uniformly and circumferentially, and top dish type magnetic bearing 31 has convex
Magnetic pole 311,312,313, lower part dish type magnetic bearing 32 have convex magnetic pole 321,322,323.The dish type magnetic bearing 31 on top
Lower end is circumferentially slotted every 120 degree from bottom to up, and the axial height slotted is top dish type magnetic bearing 31
3/5ths of axial height, fluting number are 3, and fluting radian is 90 degree, are thusly-formed three of top dish type magnetic bearing 31
Convex magnetic pole 311,312,313.The upper end of dish type magnetic bearing 32 in lower part, circumferentially every 120 degree from top to bottom into
Row fluting, fluting number are 3, and the axial height slotted is 3/5ths of the axial height of lower part dish type magnetic bearing 32, is opened
Slot radian is 90 degree, thus the convex magnetic pole 321 of the lower part dish type magnetic bearing 32 that is distributed uniformly and circumferentially of formation, 322,
323.The convex magnetic pole 311,312,313 of top dish type magnetic bearing 31 and the top permanent magnetism being located on 121 upper surface of upper rotor
Axial top air gap 21 between body 131, the convex magnetic pole 321,322,323 of lower part dish type magnetic bearing 32 be located at lower rotor
It is axial lower part air gap 22 between lower permanent magnet 132 on 122 lower surfaces.
It is wound with one group of top radial direction control coil on the convex magnetic pole of top dish type magnetic bearing 31, is in convex magnetic pole
311, winding 411,412,413 these three coils of top radial direction control coil are respectively corresponded on 312,313.It radially controls on each top
Coil processed 411,412,413 is connected in a manner of star-like connection with axial arrangement, draws three radial control coils respectively
Connecting terminal.It is also wound with one group of lower part radial direction control coil on the convex magnetic pole of each lower part dish type magnetic bearing 32, is
Winding lower part radial direction control coil 421,422,423 is respectively corresponded on convex magnetic pole 321,322,323.Each lower part is radial
Control coil 421,422,423 is connected in a manner of star-like connection with axial arrangement, draws three radial controls respectively
The connecting terminal of coil.
It is required according to magnetic loop, magnetic circuit component needs that magnetic property is good, magnetic hysteresis is low and reduces eddy-current loss and magnetic hysteresis as far as possible
Loss, thereby determines that top dish type magnetic bearing 31 and lower part dish type magnetic bearing 32 are all made of silicon steel plate stacking and form.Top permanent magnetism
Body 131 and lower permanent magnet 132 are all made of high-performance rare-earth material money iron boron.
As shown in figure 1 to 3, there are three types of Working moulds when sandwich magnetic suspending flying wheel battery for electric vehicle of the present invention works for ginseng
Formula: being charge mode, holding mode and discharge mode respectively, specific as follows:
Charge mode: flying wheel battery system is in charging, first by top dish type magnetic bearing 31 and lower part dish type magnetic bearing 32
Control rotor realizes floating, i.e., is powered to two groups of radial direction control coils 311,312,313,411,412,413, realizes radial direction two certainly
By degree active control, and upper permanent magnets 131, lower permanent magnet 132 is cooperated to realize radial torsion two degrees of freedom and axial quilt
The dynamic control that suspends.Then, it is risen after floating to center in upper rotor 121 and lower rotor 122, by extraneous electrical energy drive disc type
Fly-wheel motor 1, web-type flywheel motor 1 drive upper rotor 121 and lower rotor 122 to accelerate rotation, and the highest for reaching design turns
Speed, stores energy, and web-type flywheel motor 1 at this time makees motor use.
Holding mode: this process flywheel high speed rotation, store kinetic energy.Upper rotor 121 and lower rotor 122 reach certain
It is transferred to low-voltage after revolving speed, provides low pressure by external power electronic device, maintains the idling consumption of Energy Storage of Flywheel Battery energy
For minimum level, the revolving speed of flywheel is maintained.At this point, be powered to two groups of radial direction control coils 311,312,313,411,412,413,
The stable suspersion of upper rotor 121 and lower rotor 122 is controlled by top dish type magnetic bearing 31 and lower part dish type magnetic bearing 32, and
On the basis of keeping minimum idling consumption, inhibit the gyroscopic effect as caused by vehicle-mounted operating condition in real time.
Discharge mode: two groups of power-off of radial direction control coil 311,312,313,411,412,413 are (only in radial torsion at this time
There are driven suspension controls in two degrees of freedom and axial direction), upper rotor 121 and lower rotor 122 give web-type flywheel motor 1
Applying torque, electric energy is exported to peripheral hardware by power electronic equipment, upper rotor 121 and 122 revolving speed of lower rotor constantly decline,
Web-type flywheel motor 1 at this time makees generator use.
The working method of top dish type magnetic bearing 31 and lower part dish type magnetic bearing 32 is as follows:
The passive control realization of radial torsion two degrees of freedom and the translational motion on rotor axial: referring to fig. 4 and Fig. 5, by
It is much smaller than its radius R in the axial height h of web-type flywheel motor 1, according to magnetic resistance force characteristic: upper rotor 121 and lower part
Rotor 122 turns upper rotor 121 and lower rotor 122 1 in axial translation and radial torsional direction category driven suspension control
Denier has inclination or axial displacement, and reluctance force can all act on and be returned to equilbrium position.Two degrees of freedom direction is reversed for radial
Control, reluctance force be restore twisting resistanceF r；Control for axial direction, reluctance force are axial force Fz。
The realization of radial two degrees of freedom active control: when upper rotor 121 and lower rotor 122 are in radial two degrees of freedom
When (x, y-axis direction) is interfered and deviates equilbrium position, the radial control coil 411 on the three-phase top for being mutually 120 degree,
412,413, the rotating excitation field that a number of pole-pairs is 1 can be generated at this time by being powered, and can regard the rotation of equivalent current A1 generation as
Magnetic field (rotating excitation field that logical three-phase alternating current generates), and then form magnetic flux.Similarly, for being mutually the radial direction of 120 degree of lower part
Control coil 421,422,423, be powered the rotating excitation field (rotation that logical three-phase alternating current generates for generating that a number of pole-pairs is 1 at this time
Turn magnetic field), the rotating excitation field of equivalent current A2 generation can be regarded as, and then form magnetic flux.It is now in rotation status and has
The upper rotor 121 and lower rotor 122 of upper permanent magnets 131 and lower permanent magnet 132 are also considered as rotor equivalent electric current
The rotating excitation field (mechanical rotating excitation field) that B1, B2 are generated, and then form magnetic flux.Two kinds of magnetic field interactions, are superimposed by magnetic flux,
And then the magnetic flux density not waited is formed in radial air gap, cause radial suspension force to generate, so that upper rotor 121 and lower part turn
Son 122 returns to equilbrium position.
Since upper rotor 121 and lower rotor 122 are in radial two degrees of freedom active control, Impact direction is consistent, because
This is only by taking 121 force analysis of upper rotor as an example.Referring to Fig. 6, withxFor axis negative direction is interfered: being 1 using number of pole-pairs
The radial control coil 411,422,433 on top generates 2 pole magnetic flux C1, is affixed on 121 upper surface of upper rotor and synchronizes
Upper permanent magnets 131 generate 4 pole magnetic flux D1.At this point, 2 pole magnetic flux C1 and 4 pole magnetic flux D1 by superimposed, lead to air gapqAt 1
Magnetic flux density increases, air gapqMagnetic flux density at 2 reduces, and generates edgexThe radial suspension force of axis positive directionF ra, so that top turns
Son 121 and lower rotor 122 return to equilbrium position.
According to the above, the present invention can be realized.To those skilled in the art without departing substantially from spirit of the invention
Other changes and modifications with making in the case where protection scope, are included within the scope of the present invention.
Claims (6)
1. a kind of sandwich magnetic suspending flying wheel battery for electric vehicle, including by top end cover (71), bottom head covers (72) and circle
The vacuum chamber (7) that bucket (73) surrounds, it is characterized in that: the internal centre of vacuum chamber (7) is vertical shaft (5), vertical shaft (5)
Tip exterior is coaxial and is cased with top protection bearing (61), bottom end outer, coaxial with a gap and is cased with one with a gap
Bearing (62) are protected in lower part, and the axial middle of vertical shaft (5) is coaxially disposed web-type flywheel motor (1), web-type flywheel motor
(1) surface and underface are each coaxially identical equipped with a structure, lower in the axial direction symmetrical relative to web-type flywheel motor (1)
The dish type magnetic bearing in vertical shaft (5) outside is arranged and covered with a gap, one group of radial control is wound on each dish type magnetic bearing
Coil；The web-type flywheel motor (1) is by a stator (11), two rotors and two groups of set of permanent magnets at stator (11) is located at
The middle of web-type flywheel motor (1) and coaxially and with a gap cover vertical shaft (5) outside, 2 rotors are symmetrically arranged
In stator (11) two sides up and down and be coaxially fixedly attached on vertical shaft (5)；2 rotors are in the table that facing away from stator (11)
One group of permanent magnet is along the circumferential direction posted on face, one group of permanent magnet is made of four identical annular permanent magnets, four loops
Shape permanent magnet is arranged in annular shape in such a way that the pole N, S are extremely end to end.
2. sandwich magnetic suspending flying wheel battery for electric vehicle according to claim 1, it is characterized in that: web-type flywheel motor
(1) outer diameter is 2R, and R is the radius of web-type flywheel motor (1), the outer diameter of two rotors, two dish type magnetic bearings outer diameter with
And the circular outer diameter that permanent magnet is arranged in is 2R, the outer diameter of stator (11) is less than 2R, the axis of web-type flywheel motor (1)
It is 1:10 to height and the ratio of its radius R, the ratio of axial maximum height and radius R between two dish type magnetic bearings is 3:
5。
3. sandwich magnetic suspending flying wheel battery for electric vehicle according to claim 1, it is characterized in that: two dish type magnetic bearings
It is hollow cylindric, and each magnetic bearing has three identical convex magnetic poles being distributed uniformly and circumferentially, each
The radial control coil of one group of star-like connection is wound on three convex magnetic poles of dish type magnetic bearing.
4. sandwich magnetic suspending flying wheel battery for electric vehicle according to claim 3, it is characterized in that: top dish type magnetic bearing
(31) there is axial top gas between convex magnetic pole and the upper permanent magnets (131) on upper rotor (121) upper surface
Gap (21), the convex magnetic pole of lower part dish type magnetic bearing (32) and the lower permanent magnet being located on lower rotor (122) lower surface
(132) there is axial lower part air gap (22) between.
5. sandwich magnetic suspending flying wheel battery for electric vehicle according to claim 1, it is characterized in that: bearing is protected on top
(61) angular contact ball bearing is used, lower part protects bearing (62) to use deep groove ball bearing.
6. a kind of working method of sandwich as described in claim 1 magnetic suspending flying wheel battery for electric vehicle, it is characterized in that packet
Include following steps:
A, floating is realized by two dish type magnetic bearings controls, two rotors, after two rotors rise and float to center, extraneous electricity
Disc type fly-wheel motor (1) can be driven to accelerate rotation, web-type flywheel motor (1) makees motor use；
B, two rotors, which reach, provides low pressure by external power electronic device after certain revolving speed and maintains revolving speed, two dish type magnetic bearings
Two rotor stabilities are controlled to suspend；
C, two groups of radial direction control coil power-off are controlled, two rotors apply torque, export electricity to peripheral hardware by power electronic equipment
Can, upper two rotor speed constantly declines, and web-type flywheel motor (1) makees generator use.
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| US8269470B2 (en) * | 2008-07-03 | 2012-09-18 | Yen-Wei Hsu | Mechanical flow battery |
| CN202713053U (en) * | 2012-06-18 | 2013-01-30 | 江苏大学 | Flywheel battery supported and driven by split magnetic levitation switch reluctance motor |
| CN103047283B (en) * | 2012-12-28 | 2015-04-22 | 江苏大学 | Large-air gap five-freedom degree miniature magnetic bearing and working method |
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2016
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