CN202616922U - Flywheel energy storage device utilizing bearingless switched reluctance motor - Google Patents

Flywheel energy storage device utilizing bearingless switched reluctance motor Download PDF

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Publication number
CN202616922U
CN202616922U CN 201220202066 CN201220202066U CN202616922U CN 202616922 U CN202616922 U CN 202616922U CN 201220202066 CN201220202066 CN 201220202066 CN 201220202066 U CN201220202066 U CN 201220202066U CN 202616922 U CN202616922 U CN 202616922U
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CN
China
Prior art keywords
magnetic
permanent
axial
flywheel
stator
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Expired - Fee Related
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CN 201220202066
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Chinese (zh)
Inventor
孙玉坤
朱志莹
项倩雯
张新华
周云红
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Jiangsu University
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Jiangsu University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

The utility model discloses a flywheel energy storage device utilizing a bearingless switched reluctance motor, wherein a permanent magnet unloading bearing, a bearingless switched reluctance motor, a flywheel rotor and a mixed magnetic bearing are sequentially sleeved between the upper end and the lower end of a flywheel rotating shaft, and the permanent magnet unloading bearing is used for unloading the axial weight of the flywheel rotating shaft; the mixed magnetic bearing on the lower end overcomes the residual weight and dynamic load of the flywheel rotating shaft, guarantees the axial stable suspension of the flywheel rotating shaft and provides radial suspension support with two degrees of freedom to the flywheel rotating shaft, and the bearingless switched reluctance motor finishes the other radial suspension with two degrees of freedom and electric/power generation function; and the high speed electric/power generation operation advantages and the automatic suspension function of the bearingless switched reluctance motor are organically combined with the strong unloading and controllable suspension characteristics of the mixed magnetic bearing to realize the low dissipation and high-reliable suspension with five degrees of freedom of the flywheel, improve the operating speed of the flywheel and reduce the power consumption and volume of the system.

Description

A kind of energy accumulation device for fly wheel that adopts magnetic suspension switched reluctance motor
Technical field
The utility model belongs to the power storage technical field, relates in particular to a kind of energy accumulation device for fly wheel that adopts magnetic suspension switched reluctance motor, is specially adapted to fields such as uninterrupted power supply, track traffic and power engineering.
Background technology
Along with the fast development of new industries such as new forms of energy, intelligent grid and electric automobile, energy storage technology becomes the important research project in the world today.At present; Whole world energy storage representative technology draw water energy storage, compressed-air energy storage, batteries to store energy, superconducting energy storage, super capacitor energy-storage and flywheel energy storage etc.; Wherein flywheel energy storage is that electric energy is converted into a kind of physics energy storage technology that the rotation function of flywheel stores, and possesses that energy storage density is big, conversion efficiency is high, long service life, discharges and recharges advantage such as quick, cleanliness without any pollution.Be particularly suitable for fields such as uninterrupted power supply, track traffic and power engineering.
The flywheel energy storage technology owing to self high-speed cruising characteristic, proposes high performance requirements for block bearing and driving motor when through engineering approaches realizes.In order to reduce the loss of energy accumulation device for fly wheel self-energy, adopt magnetic suspension and vacuum technique usually.And energy accumulation device for fly wheel mainly contains induction machine, magneto and switched reluctance machines with motor.Wherein the intrinsic energy consumption of induction machine is big, speed adjustable range is narrow, energy conversion efficiency is low.And magneto high-speed cruising magnetic hysteresis loss is big, the demagnetization phenomenon is serious down for rotor mechanical intensity difference, the permanent magnet high temperature of embedding/post permanent magnet.By contrast; The switched reluctance machines stator and rotor adopt the biconvex electrode structure; Rotor does not have winding/sliver and permanent magnet; Possess firm, the incomparable advantages of a series of other motors such as mechanical strength is big, speed-regulating range width, operational efficiency is high, critical whirling speed is high, zero load is almost lossless simple in structure, the energy accumulation device for fly wheel that be specially adapted at a high speed, ultrahigh speed is moved.
But separate transmission and the support unit of the many employings of flywheel current energy storage device; There are many deficiencies; Owing to do not consider the combination property requirement of energy accumulation device for fly wheel comprehensively; Do not find the optimum structure scheme of suspend supporting and driving motor, do not form the perfect suspension supporting and the structure of driving motor, make the cost of energy accumulation device for fly wheel and efficient reach ideal situation far away.Therefore; The supporting that how will suspend combines with driving motor; Optimize the organization plan of composite suspension supporting and high speed driving motor, reduce flywheel energy storage system running wastage and cost, improving operational efficiency and reliability is the key issue that at present efficient energy accumulation device for fly wheel presses for solution.
Summary of the invention
The purpose of the utility model is to propose a kind of energy accumulation device for fly wheel that adopts magnetic suspension switched reluctance motor; The supporting that will suspend combines with driving motor; Utilize magnetic suspension switched reluctance motor high-speed cruising advantage and the function that suspends certainly, can improve flywheel limit speed and dynamic property, reduce supporting power consumption, cost and volume; Reduce the flywheel energy storage system running wastage, improve operational efficiency and reliability.
For realizing above-mentioned purpose; The technical scheme that the utility model adopts is: comprise shell, flywheel rotor and flywheel rotating shaft, be with permanent magnetism unloading bearing, magnetic suspension switched reluctance motor, flywheel rotor, hybrid magnetic bearing between the top and bottom of flywheel rotating shaft successively; Said magnetic suspension switched reluctance motor is three-phase 12/8 a biconvex electrode structure; Comprise torque winding, suspending windings, motor stator and rotor, the rotor flywheel rotating shaft that is connected, the motor stator shell that is connected; Leave the 0.5mm radial air gap between motor stator and the rotor; Torque winding and suspending windings lap wound are on motor stator, and suspending windings is near the rotor side, and the torque winding is near motor stator yoke side.
Said permanent magnetism unloading bearing comprises magnetic conductor, following magnetic conductor, interior permanent-magnetic clamp, middle permanent-magnetic clamp and outer permanent-magnetic clamp; The last magnetic conductor outer casing inner wall that is connected; The flywheel rotating shaft that is connected of following magnetic conductor; Between last magnetic conductor and the following magnetic conductor and along the flywheel rotating shaft radially be provided with at interval from inside to outside equal thickness and concentric be connected side by side on magnetic conductor interior permanent-magnetic clamp, middle permanent-magnetic clamp and outside permanent-magnetic clamp; Interior permanent-magnetic clamp magnetizes with the axial negative direction of outer permanent-magnetic clamp along the flywheel rotating shaft, and middle permanent-magnetic clamp ring magnetizes along the axial positive direction of flywheel rotating shaft, permanent-magnetic clamp and outer permanent-magnetic clamp axial charging area sum in middle permanent-magnetic clamp axial charging area equals; Leave the 1mm axial air-gap between following magnetic conductor and the permanent-magnetic clamp.
Said hybrid magnetic bearing comprises axial stator, radial stator, bearing rotor, radially control coil, axially control coil and radial permanent magnet ring; Radial permanent magnet ring radial magnetizing; The axial stator shell that is connected, 2 the axial control coils axial stator that is connected, radial stator evenly distributes along circumference 120 degree; The equal lap wound of each radial stator is control coil radially; The radial permanent magnet ring is embedded in the junction of axial stator and radial stator, leaves the radial air gap of 0.5mm between bearing rotor and the radial stator, leaves the last axial air-gap and following axial air gap of 0.5mm between bearing rotor and the axial stator; The logical direct currents of 2 axial control coils, 3 logical three-phase alternating currents of control coil winding radially.
Compared with prior art, the beneficial effect of the utility model is:
(1) axial length shortening, critical whirling speed improve
This device adopts magnetic suspension switched reluctance motor that active radial support power and revolving force are provided, and can save a radial direction magnetic bearing, makes to help improving system's critical whirling speed by the rotor axial contraction in length.
(2) firm in structure, suitable high-speed cruising
Whole device simple in structure, especially rotor does not have permanent magnet and is merely magnetic conductive iron, and is simple in structure firm, is convenient at a high speed, the ultrahigh speed operation, helps improving the limit speed of flywheel, and then improves the stored energy capacitance of this flywheel energy storage system.
(3) reduce volume and cost, reduce system power dissipation
Utilize permanent magnetism unloading bearing to realize axially unloading; Hybrid magnetic bearing only need overcome rotating shaft residuals weight and dynamic loading; Adopt permanent magnetism unloading bearing and hybrid magnetic bearing simultaneously and utilize magnetic suspension switched reluctance motor to realize the highly reliable full suspension of five degree of freedom low-power consumption of flywheel rotating shaft, reduced device volume, cost and power consumption.
Description of drawings
Fig. 1 is the described a kind of energy accumulation device for fly wheel structural representation that adopts magnetic suspension switched reluctance motor of the utility model;
Label title among Fig. 1: 1, shell; 2, go up auxiliary bearing; 3, permanent magnetism unloading bearing; 4, magnetic suspension switched reluctance motor; 5, flywheel rotor; 6, hybrid magnetic bearing; 7, following auxiliary bearing; 8, flywheel rotating shaft.
Fig. 2 is the structure enlarged diagram of permanent magnetism unloading bearing 3 among Fig. 1;
Label title among Fig. 2: 301, go up magnetic conductor; 302, following magnetic conductor; 303, interior permanent-magnetic clamp; 304, middle permanent-magnetic clamp; 305, outer permanent-magnetic clamp.
Fig. 3 is the enlarged diagram of overlooking of magnetic suspension switched reluctance motor 4 among Fig. 1;
Label title among Fig. 3: 401, torque winding; 402, suspending windings; 403, motor stator; 404, rotor.
Fig. 4 is the structure enlarged diagram of hybrid magnetic bearing 6 among Fig. 1;
Label title among Fig. 4: 601, axial stator; 602, radial stator; 603, bearing rotor; 604, control coil radially; 605, axial control coil; 606, radial permanent magnet ring.
Fig. 5 is the vertical view of Fig. 4.
Embodiment
As shown in Figure 1, the utility model comprises shell 1, upward auxiliary bearing 2, permanent magnetism unloading bearing 3, magnetic suspension switched reluctance motor 4, flywheel rotor 5, hybrid magnetic bearing 6, auxiliary bearing 7 and flywheel rotating shaft 8 down.The two ends up and down of flywheel rotating shaft 8 are separately positioned on auxiliary bearing 2 and the following auxiliary bearing 7, and last auxiliary bearing 2 and following auxiliary bearing 7 are separately fixed at the two ends up and down of shell 1.Suit permanent magnetism unloading bearing 3, magnetic suspension switched reluctance motor 4, flywheel rotor 5, hybrid magnetic bearing 6 successively between the top and bottom of flywheel rotating shaft 8.Flywheel rotor 5 is fixedly sleeved in flywheel rotating shaft 8.The axial weight of the permanent magnetism unloading bearing 3 unloading flywheel rotating shafts 8 of upper end; The hybrid magnetic bearing 6 of lower end cooperates permanent magnetism unloading bearing 3 to overcome flywheel rotating shaft 8 residuals weight and dynamic loading; Guarantee flywheel rotating shaft 8 axial stable suspersions; Radially two-freedom suspension supporting of flywheel rotating shaft 8 is provided simultaneously, and magnetic suspension switched reluctance motor 4 is accomplished the radially suspension and the electronic/electricity generate function of two other degree of freedom, realizes the energy accumulation device for fly wheel of five-freedom degree full-suspension.
As shown in Figure 2; The permanent magnetism unloading bearing 3 that the utility model adopted comprises magnetic conductor 301, following magnetic conductor 302, interior permanent-magnetic clamp 303, middle permanent-magnetic clamp 304 and outer permanent-magnetic clamp 305; Last magnetic conductor 301 is fixed on shell 1 inwall; Following magnetic conductor 302 is fixed in the flywheel rotating shaft 8; Between last magnetic conductor 301 and following magnetic conductor 302 in radially being provided with at interval from inside to outside of flywheel rotating shaft 8 permanent-magnetic clamp 303, middle permanent-magnetic clamp 304 and outside permanent-magnetic clamp 305, interior permanent-magnetic clamp 303, middle permanent-magnetic clamp 304 and outer permanent-magnetic clamp 305 equal thickness and concentric are fixed on the magnetic conductor 301 side by side.Interior permanent-magnetic clamp 303 magnetizes with the axial negative direction of outer permanent-magnetic clamp 305 along flywheel rotating shaft 8; Middle permanent-magnetic clamp 304 encircles vertically, and positive direction magnetizes; Permanent-magnetic clamp 303 and outer permanent-magnetic clamp 305 axial charging area sums in middle permanent-magnetic clamp 304 axial charging areas equal; Permanent-magnetic clamp can adopt but be not limited to the Ru-Fe-Mn material; Last magnetic conductor 301 is can adopt but be not limited to the good alloy steel material of magnetic property to process with following magnetic conductor 302, all leaves 1mm axial air-gap 306 between following magnetic conductor 302 and 3 permanent-magnetic clamps; The bias magnetic field that three permanent-magnetic clamps provide produces the magnetic force along Z axle forward on magnetic conductor 302 surfaces down, realizes the quality unloading of flywheel rotor 5.
As shown in Figure 3; The magnetic suspension switched reluctance motor 4 that the utility model adopted is three-phase 12/8 biconvex electrode structure, between permanent magnetism unloading bearing 3 and flywheel rotor 5, comprises torque winding 401, suspending windings 402, motor stator 403 and rotor 404; Rotor 404 is fixed in the flywheel rotating shaft 8; Motor stator 403 is fixed on the shell 1, leaves 0.5mm radial air gap 406 between motor stator 403 and the rotor 404, and torque winding 401 and suspending windings 402 lap wounds are on motor stator 403; Suspending windings 402 is near rotor 404 sides; Torque winding 402 is example near motor stator 403 yoke sides with A mutually, and torque winding 401 is formed by 4 windings in series on the salient pole; Suspending windings 402 comprises α direction and β direction suspending windings, is formed over against the windings in series on the salient pole by 2 in direction separately respectively.Whenever at a distance from 15 degree excitation conductings in turn, suspending windings 402 is calculated the required electric current of suspending power according to the variation of radial load and torque winding current to torque winding 401, realizes the stable suspersion operation.
Like Fig. 4 and shown in Figure 5, the hybrid magnetic bearing 6 that the utility model adopted comprises axial stator 601, radial stator 602, bearing rotor 603, radially control coil 604, axially control coil 605 and radial permanent magnet ring 606.Radial permanent magnet ring 606 adopts the radial magnetizing mode; Axial stator 601 is fixed on the shell 1 inwall downside; 2 axial control coils 605 are fixed on the axial stator 601; Radial stator 602 evenly distributes along circumference 120 degree, and each radial stator 602 equal lap wound is control coil 604 radially, and radial permanent magnet ring 606 is embedded in the junction of axial stator 601 and radial stator 602; Leave the radial air gap 607 of 0.5mm between bearing rotor 603 and the radial stator 602, leave 0.5mm between bearing rotor 603 and the axial stator 601 and go up axial air-gap 608 and following axial air gap 609.Radial stator 602 is formed by silicon steel plate stacking, and radial permanent magnet ring 606 adopts rare earth material neodymium iron boron radial magnetizings to process.Axial 2 axial control coils, 605 logical direct currents are controlled axial single-degree-of-freedom during work, along 3 of the equally distributed A of circumference 120 degree, B, C radially control coil 604 windings pass to three-phase alternating current and produce rotatable resultant flux and control radially 2 degrees of freedom.This hybrid magnetic bearing 6 cooperates permanent magnetism unloading bearing 3 to accomplish the controllable suspension of axial freedom, and the radially suspending power of two-freedom is provided simultaneously, cooperates with magnetic suspension switched reluctance motor 4 and accomplishes the energy storage device five-freedom degree full-suspension.

Claims (4)

1. energy accumulation device for fly wheel that adopts magnetic suspension switched reluctance motor; Comprise shell (1), flywheel rotor (5) and flywheel rotating shaft (8), it is characterized in that: be with permanent magnetism unloading bearing (3), magnetic suspension switched reluctance motor (4), flywheel rotor (5), hybrid magnetic bearing (6) between the top and bottom of flywheel rotating shaft (8) successively; Said magnetic suspension switched reluctance motor (4) is three-phase 12/8 a biconvex electrode structure; Comprise torque winding (401), suspending windings (402), motor stator (403) and rotor (404); Rotor (404) the flywheel rotating shaft (8) that is connected; Motor stator (403) shell 1 that is connected leaves 0.5mm radial air gap (406) between motor stator (403) and the rotor (404), and torque winding (401) and suspending windings (402) lap wound are on motor stator (403); Suspending windings (402) is near rotor (404) side, and torque winding (402) is near motor stator (403) yoke side.
2. a kind of energy accumulation device for fly wheel that adopts magnetic suspension switched reluctance motor according to claim 1; It is characterized in that: said permanent magnetism unloading bearing (3) comprises magnetic conductor (301), following magnetic conductor (302), interior permanent-magnetic clamp (303), middle permanent-magnetic clamp (304) and outer permanent-magnetic clamp (305); Last magnetic conductor (301) shell (1) inwall that is connected; Following magnetic conductor (302) the flywheel rotating shaft (8) that is connected; Between last magnetic conductor (301) and the following magnetic conductor (302) and along flywheel rotating shaft (8) radially be provided with at interval from inside to outside equal thickness and concentric be connected side by side the interior permanent-magnetic clamp (303) of going up magnetic conductor (301), middle permanent-magnetic clamp (304) and outside permanent-magnetic clamp (305); Interior permanent-magnetic clamp (303) and outer permanent-magnetic clamp (305) magnetize along the axial negative direction of flywheel rotating shaft (8); Middle permanent-magnetic clamp (304) ring magnetizes along the axial positive direction of flywheel rotating shaft (8), and middle permanent-magnetic clamp (304) axial charging area equals interior permanent-magnetic clamp (303) and outer permanent-magnetic clamp (305) axial charging area sum; All leave 1mm axial air-gap (306) between following magnetic conductor (302) and 3 said permanent-magnetic clamps.
3. a kind of energy accumulation device for fly wheel that adopts magnetic suspension switched reluctance motor according to claim 1 is characterized in that: said hybrid magnetic bearing (6) comprises axial stator (601), radial stator (602), bearing rotor (603), radially control coil (604), axially control coil (605) and radial permanent magnet ring (606); Radial permanent magnet ring (606) radial magnetizing; Axial stator (601) shell (1) that is connected; 2 axial control coils (605) axial stator (601) that is connected; Radial stator (602) evenly distributes along circumference 120 degree, and the equal lap wound of each radial stator (602) is control coil (604) radially, and radial permanent magnet ring (606) is embedded in the junction of axial stator (601) and radial stator (602); Leave the radial air gap (607) of 0.5mm between bearing rotor (603) and the radial stator (602), leave the upper and lower axial air-gap (608,609) of 0.5mm between bearing rotor (603) and the axial stator (601); 2 axial control coils (605) lead to direct current, 3 logical three-phase alternating currents of control coil (604) winding radially.
4. a kind of energy accumulation device for fly wheel that adopts magnetic suspension switched reluctance motor according to claim 1 is characterized in that: the upper/lower terminal of flywheel rotating shaft (8) is respectively through last auxiliary bearing (2), following auxiliary bearing (7) upper/lower terminal of shell (1) that is connected.
CN 201220202066 2012-05-08 2012-05-08 Flywheel energy storage device utilizing bearingless switched reluctance motor Expired - Fee Related CN202616922U (en)

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Application Number Priority Date Filing Date Title
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102684365A (en) * 2012-05-08 2012-09-19 江苏大学 Flywheel energy storage device adopting bearingless switched reluctance motor
CN103872839A (en) * 2014-03-18 2014-06-18 上海交通大学 Energy collection and storage system and method based on magnetic suspension flywheel
CN103904816A (en) * 2014-03-25 2014-07-02 南方科技大学 Flywheel energy storage device, wind power generating system and vehicle energy feedback brake system
CN105186740A (en) * 2015-10-09 2015-12-23 清华大学 Inertia energy storage system
AT516304A1 (en) * 2014-09-19 2016-04-15 Traktionssysteme Austria Gmbh flywheel energy storage
CN108988537A (en) * 2018-08-23 2018-12-11 陈国宝 Superimposed type external rotor electric machine without enameled wire
CN109510382A (en) * 2018-12-11 2019-03-22 上海航天控制技术研究所 A kind of novel magnetically levitated accumulated energy flywheel rotor
CN110112860A (en) * 2019-04-22 2019-08-09 江苏大学 Five degree of freedom unilateral side suspension bearing formula dribbling flywheel integrated vehicle energy storage device
CN110429780A (en) * 2019-08-22 2019-11-08 成都署信科技有限公司 A kind of permanent magnet iron coreless motor for electric vehicle

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102684365A (en) * 2012-05-08 2012-09-19 江苏大学 Flywheel energy storage device adopting bearingless switched reluctance motor
CN103872839A (en) * 2014-03-18 2014-06-18 上海交通大学 Energy collection and storage system and method based on magnetic suspension flywheel
CN103904816A (en) * 2014-03-25 2014-07-02 南方科技大学 Flywheel energy storage device, wind power generating system and vehicle energy feedback brake system
CN103904816B (en) * 2014-03-25 2016-08-24 南方科技大学 Energy accumulation device for fly wheel, wind generator system and vehicle energy regenerative braking system
AT516304B1 (en) * 2014-09-19 2019-03-15 Traktionssysteme Austria Gmbh flywheel energy storage
AT516304A1 (en) * 2014-09-19 2016-04-15 Traktionssysteme Austria Gmbh flywheel energy storage
CN105186740B (en) * 2015-10-09 2018-01-23 清华大学 A kind of inertia energy storage system
CN105186740A (en) * 2015-10-09 2015-12-23 清华大学 Inertia energy storage system
CN108988537A (en) * 2018-08-23 2018-12-11 陈国宝 Superimposed type external rotor electric machine without enameled wire
CN109510382A (en) * 2018-12-11 2019-03-22 上海航天控制技术研究所 A kind of novel magnetically levitated accumulated energy flywheel rotor
CN110112860A (en) * 2019-04-22 2019-08-09 江苏大学 Five degree of freedom unilateral side suspension bearing formula dribbling flywheel integrated vehicle energy storage device
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
CN110429780A (en) * 2019-08-22 2019-11-08 成都署信科技有限公司 A kind of permanent magnet iron coreless motor for electric vehicle

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121219

Termination date: 20170508

CF01 Termination of patent right due to non-payment of annual fee