CN202167936U - Flywheel energy storage apparatus - Google Patents

Flywheel energy storage apparatus Download PDF

Info

Publication number
CN202167936U
CN202167936U CN 201120288433 CN201120288433U CN202167936U CN 202167936 U CN202167936 U CN 202167936U CN 201120288433 CN201120288433 CN 201120288433 CN 201120288433 U CN201120288433 U CN 201120288433U CN 202167936 U CN202167936 U CN 202167936U
Authority
CN
China
Prior art keywords
flywheel
electric machine
rotor
motor
excitation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN 201120288433
Other languages
Chinese (zh)
Inventor
程明
张淦
花为
张建忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southeast University
Original Assignee
Southeast University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southeast University filed Critical Southeast University
Priority to CN 201120288433 priority Critical patent/CN202167936U/en
Application granted granted Critical
Publication of CN202167936U publication Critical patent/CN202167936U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

Links

Classifications

    • 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 relates to a flywheel energy storage apparatus for an electric excitation dual-protruding pole motor, wherein when energy exchange is not performed between the flywheel energy storage apparatus and the surrounding environment thereof, a motor excitation winding is arranged in a state of open circuit, inside a motor gap there is provided no a magnetic field, and inside a motor iron core there are provided no eddy loss and hysteresis loss, and thereby the energy consumption of the flywheel energy storage system can be remarkably reduced, the energy storage time of the flywheel is greatly prolonged, and the energy conversion efficiency of the whole system and the system safety are increased. The flywheel energy storage apparatus comprises an upper magnetic bearing (1), a vacuum cavity (2), a flywheel body (3), a housing (4), a motor rotor (5), a motor stator (6), a lower magnetic bearing (7), and a flywheel rotating shaft (8), wherein a motor stator iron core (601) is formed by 2n blocks of arc iron cores forming a circle, the n is a natural number, between each two blocks of arc iron cores there is provided an excitation winding (602), and an armature winding (603) is located on the teeth of the inner circumference of the motor stator iron core (601).

Description

A kind of energy accumulation device for fly wheel
Technical field
The utility model belongs to the power storage technical field, and specifically, what relate to is a kind of novel efficient energy accumulation device for fly wheel.
Background technology
Along with the fast development of generation of electricity by new energy and electric automobile etc., the application of apparatus for storing electrical energy is increasingly extensive.In numerous apparatus for storing electrical energy, energy accumulation device for fly wheel does not have advantages such as secondary pollution because of dynamic property is good, is just receiving increasing attention.The basic principle of flywheel energy storage is, at first does the motor operation through motor and drives flywheel and quicken, and converts electrical energy into kinetic energy and is stored on the flywheel rotor, when needing, drives motor by flywheel again and makes generator operation, converts the kinetic energy in the flywheel into electric energy.Because square being directly proportional of the kinetic energy that stores in the flywheel rotor and flywheel rotating speed, therefore, the flywheel rotating speed height of should trying one's best reaches tens thousand of rev/mins usually and very arrives hundreds thousand of rev/mins.Flywheel not with extraneous positive energy exchange, when promptly being in holding state, in order to reduce the own loss of runner, adopting magnetic suspension bearing usually, and the flywheel chamber be evacuated, to reduce the friction loss of bearing and rotor.In order to improve energy conversion efficiency, magneto is widely used in the energy accumulation device for fly wheel.So, do not carry out NE BY ENERGY TRANSFER at flywheel energy storage system, when promptly system is in the energy storage operating state with the external world; Along with the flywheel high speed rotating; Permanent magnetic field can be at inner eddy current loss and the magnetic hysteresis loss of producing of electric machine iron core, the energy that this will constantly consume in the flywheel to be stored, and rotating speed is high more; Magnetic field in the electric machine iron core is strong more, and then loss is big more.The waste that this not only causes energy has reduced the whole efficient of flywheel energy storage system, makes present flywheel energy storage time very short (short then a few minutes, long then dozens of minutes), has greatly limited the application of energy accumulation device for fly wheel.And; Eddy current loss and magnetic hysteresis loss also can cause the electric machine iron core heating, and this will cause the flywheel energy storage system fail safe to reduce, and the heat radiation to flywheel energy storage system simultaneously proposes requirements at the higher level; Make that the overall structure of flywheel energy storage system is complicated more, also manufacturing process is proposed requirements at the higher level.Therefore, how to reduce the energy loss of flywheel energy storage system, improve energy conversion efficiency, and the raising security of system is one of key technology of flywheel research and development.
Summary of the invention
Technical problem:The purpose of the utility model provides a kind of energy accumulation device for fly wheel of electric excitation biconvex electrode electric machine; When this flywheel energy storage system does not carry out NE BY ENERGY TRANSFER with the external world, the motor excitation winding is placed open-circuit condition, making does not have magnetic field in the motor gas-gap; Then inner no eddy current loss of electric machine iron core and magnetic hysteresis loss; Can significantly reduce the energy consumption of flywheel energy storage system, prolong the energy storage time of flywheel greatly, improve the energy conversion efficiency of entire system and the fail safe of system.
Technical scheme:For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: this device comprises magnetic bearing, vacuum chamber, flywheel body, shell, rotor, motor stator, magnetic bearing, flywheel rotating shaft; The two ends up and down of flywheel rotating shaft are separately positioned on magnetic bearing and the magnetic bearing; Last magnetic bearing and magnetic bearing are separately fixed at the two ends up and down of shell; Flywheel body and rotor are separately fixed in the flywheel rotating shaft; Motor stator is fixed on the shell in the rotor outside, constitutes the energy accumulation device for fly wheel of radial air gap electricity excitation type double salient-pole electric machine; Motor stator comprises electric machine stator iron, excitation winding, armature winding; Wherein electric machine stator iron connects into a circle by 2n piece circular arc iron core, and this number n is a natural number, between per two circular arc iron cores, is provided with excitation winding, and armature winding is positioned on the tooth of electric machine stator iron circle.Described rotor and motor stator adopt axially and are provided with, and promptly rotor is arranged on the flywheel body, and motor stator is arranged on the below of rotor, constitute the energy accumulation device for fly wheel of axial air-gap electric excitation biconvex electrode electric machine.Rotor and motor stator are the biconvex electrode structure.
This device can also for: motor stator comprises electric machine stator iron, excitation winding, armature winding; Wherein electric machine stator iron connects into a circle by 2n piece segment core, and this number n is a natural number, between per two blocks of segment cores, is provided with excitation winding, and each group armature winding is surrounded on the tooth of adjacent two electric machine stator iron sides.
Beneficial effect:Compared with prior art, adopt the beneficial effect of the technical scheme of the utility model to be:
1. work as flywheel and be in the energy storage state, (NE BY ENERGY TRANSFER refers to motor as motor, and the kinetic energy that converts electric energy to the flywheel body comes stored energy not carry out NE BY ENERGY TRANSFER with the external world; Or motor is as generator; Converting the kinetic energy of flywheel body to electric energy releases energy) time; The excitation of motor is placed open-circuit condition, and generation eddy current loss and magnetic hysteresis loss have been avoided in the inner no magnetic field of electric machine iron core; Prolong energy storage time, improved the whole energy conversion efficiency of flywheel energy storage system.
2. because when flywheel energy storage system does not carry out NE BY ENERGY TRANSFER; Avoided the generation of internal vortex loss unshakable in one's determination and magnetic hysteresis loss; When improving system effectiveness; Also avoided by eddy current loss and the caused heating unshakable in one's determination of magnetic hysteresis loss loss, so help improving the cooling condition of system more.
3. whole device is simple in structure, and especially because motor adopts the biconvex electrode structure, and rotor is merely magnetic conductive iron, structure is simple rigid very, is particularly suitable for high-speed cruising.This will more help improving the maximum speed of flywheel, and then improve the energy storage capability of this flywheel energy storage system.
Simultaneously, armature winding can adopt concentrates winding and two kinds of forms of distributed winding, and rotor also can adopt straight trough and skewed slot dual mode.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the integrally-built sectional view of the said energy accumulation device for fly wheel of the utility model.Wherein have: go up magnetic bearing 1, vacuum chamber 2, flywheel body 3, shell 4, rotor 5, motor stator 6, magnetic bearing 7, flywheel rotating shaft 8;
Fig. 2 has enumerated the sectional view of the radial air gap formula electricity excitation type double salient-pole electric machine that motor can adopt in a kind of the utility model.Rotor 5 is arranged, electric machine stator iron 601, excitation winding 602 and armature winding 603 among the figure.
Fig. 3 has enumerated the sectional view of the radial air gap formula electricity excitation type double salient-pole electric machine that motor can adopt in another kind of the utility model.Rotor 5 is arranged, electric machine stator iron 601, excitation winding 602 and armature winding 603 among the figure.
Need to prove that except that two kinds of cited radial air gap formulas electricity excitation type double salient-pole electric machines of Fig. 2 and Fig. 3, the said energy accumulation device for fly wheel of the utility model also can be adopted the radial air gap formula electricity excitation type double salient-pole electric machine with other types, enumerates no longer one by one at this.
Cutaway view when using axial air-gap type electricity excitation type double salient-pole electric machine shown in Figure 4 for this flywheel energy storage system.Wherein have: go up magnetic bearing 1, vacuum chamber 2, flywheel body 3, shell 4, rotor 5, motor stator 6, magnetic bearing 7, flywheel rotating shaft 8.
Fig. 5 has enumerated a kind of graphics of axial air-gap type electricity excitation type double salient-pole electric machine, rotor 5 is arranged, electric machine stator iron 601, excitation winding 602 and armature winding 603 among the figure.Need to prove,, only shown a coil of armature winding 603 among Fig. 5 for the ease of observing.
Shown in Figure 6 is the schematic three dimensional views of rotor 5 among Fig. 5.
Except that the electric excitation type double salient-pole electric machine of the cited a kind of axial air-gap of Fig. 5; The said energy accumulation device for fly wheel of the utility model is when using structure shown in Figure 4; Also can adopt axial air-gap type electricity excitation type double salient-pole electric machine, enumerate no longer one by one at this with other types.
Embodiment
As shown in Figure 1, a kind of energy accumulation device for fly wheel that uses radial air gap formula electricity excitation type double salient-pole electric machine of the utility model, this device comprises magnetic bearing 1, vacuum chamber 2; Flywheel body 3, shell 4, rotor 5; Motor stator 6, magnetic bearing 7, flywheel rotating shaft 8; The two ends up and down of flywheel rotating shaft 8 are separately positioned on magnetic bearing 1 and the magnetic bearing 7; Last magnetic bearing 1 and magnetic bearing 7 are separately fixed at the two ends up and down of shell 4; Flywheel body 3 is separately fixed in the flywheel rotating shaft 8 with rotor 5; Motor stator 6 is fixed on the shell 4 in rotor 5 outsides, constitutes the energy accumulation device for fly wheel of radial air gap electricity excitation type double salient-pole electric machine; Motor stator 6 comprises electric machine stator iron 601, excitation winding 602, armature winding 603; Wherein electric machine stator iron 601 connects into a circle by 2n piece circular arc iron core, and this number n is a natural number, between per two circular arc iron cores, is provided with excitation winding 602, and armature winding 603 is positioned on the tooth of electric machine stator iron 601 circles.
Described motor adopts radial air gap formula electricity excitation type biconvex electrode structure, and motor comprises stator and two parts of rotor, is two kinds of typical electric excitation type double salient-pole electric machines as shown in Figures 2 and 3.With electric machine structure among Fig. 2 is example, and said rotor 5 structures are very simple, has not both had permanent magnet and has not also had winding, for folded forming pressed in simple magnetic conductive iron punching.Can be made as straight trough rotor or skewed rotor as required.Said motor stator comprises stator core 601, excitation winding 602, armature winding 603.Stator core 601 is also pressed folded forming for simple magnetic conductive iron punching, for armature winding 603, can adopt centralized winding, also can adopt distributed winding.
When this flywheel energy storage system need with the external world carry out NE BY ENERGY TRANSFER (be motor as motor, the kinetic energy that converts electric energy to the flywheel body comes stored energy; Or motor converts the kinetic energy of flywheel body to electric energy and releases energy as generator) time, to give in the excitation winding 602 and feed direct current, the excitation field direction that each excitation winding produced is shown in arrow among the figure.Do not carry out NE BY ENERGY TRANSFER with the external world and work as this flywheel energy storage system, when promptly being in the energy storage state, put excitation winding 602 in open-circuit condition, do not have magnetic field in the motor gas-gap this moment, therefore do not have eddy current loss and magnetic hysteresis loss yet.Be another kind of Magneticflux-switching type double salient-pole electric machine shown in Fig. 3, its operation principle in flywheel energy storage system is the same.
Need to prove that Fig. 2 and Fig. 3 have only enumerated two kinds of common radial air gap formula electricity excitation type double salient-pole electric machine structures, this flywheel energy storage system also can adopt other to have the radial air gap formula electric excitation biconvex electrode electric machine of above-mentioned characteristic, does not enumerate one by one at this.
As shown in Figure 4, the energy accumulation device for fly wheel of the utility model also can use axial air-gap type electricity excitation type double salient-pole electric machine, comprises magnetic bearing 1, vacuum chamber 2, flywheel body 3, shell 4, rotor 5, motor stator 6, magnetic bearing 7, flywheel rotating shaft 8.Rotor 5 and flywheel body 3 integrators, motor stator 6 is fixed on the shell 4.The operation principle of the flywheel energy storage system of this kind structure is identical with the operation principle of flywheel energy storage system shown in Figure 1, repeats no more at this.
Fig. 5 has enumerated a kind of graphics of axial air-gap type electricity excitation type double salient-pole electric machine, rotor 5 is arranged, electric machine stator iron 601, excitation winding 602 and armature winding 603 among the figure.Need to prove,, only shown a coil of armature winding 603 among Fig. 5 for the ease of observing.
Fig. 5 has only enumerated a kind of axial air-gap type electricity excitation type double salient-pole electric machine structure, and this flywheel energy storage system also can adopt other to have the axial air-gap type electric excitation biconvex electrode electric machine of above-mentioned characteristic, does not enumerate one by one at this.

Claims (4)

1. the energy accumulation device for fly wheel of an electric excitation biconvex electrode electric machine is characterized in that this device comprises magnetic bearing (1), vacuum chamber (2); Flywheel body (3), shell (4), rotor (5); Motor stator (6), magnetic bearing (7), flywheel rotating shaft (8); The two ends up and down of flywheel rotating shaft (8) are separately positioned on magnetic bearing (1) and the magnetic bearing (7); Last magnetic bearing (1) and magnetic bearing (7) are separately fixed at the two ends up and down of shell (4); Flywheel body (3) and rotor (5) are separately fixed in the flywheel rotating shaft (8); Motor stator (6) is fixed on the shell (4) in rotor (5) outside, constitutes the energy accumulation device for fly wheel of radial air gap electricity excitation type double salient-pole electric machine; Motor stator (6) comprises electric machine stator iron (601), excitation winding (602), armature winding (603); Wherein electric machine stator iron (601) connects into a circle by 2n piece circular arc iron core; This number n is a natural number; Between per two circular arc iron cores, be provided with excitation winding (602), armature winding (603) is positioned on the tooth of electric machine stator iron (601) circle.
2. the energy accumulation device for fly wheel of electric excitation biconvex electrode electric machine as claimed in claim 1; It is characterized in that described rotor (5) and motor stator (6) adopt axially setting; Be that rotor (5) is arranged on the flywheel body (3); Motor stator (6) is arranged on the below of rotor (5), constitutes the energy accumulation device for fly wheel of axial air-gap electricity excitation type double salient-pole electric machine.
3. according to claim 1 or claim 2 the energy accumulation device for fly wheel of electric excitation biconvex electrode electric machine is characterized in that rotor (5) and motor stator (6) are the biconvex electrode structure.
4. the energy accumulation device for fly wheel of electric excitation biconvex electrode electric machine as claimed in claim 1 is characterized in that motor stator (6) comprises electric machine stator iron (601), excitation winding (602), armature winding (603); Wherein electric machine stator iron (601) connects into a circle by 2n piece segment core; This number n is a natural number; Between per two blocks of segment cores (601), be provided with excitation winding (602), each group armature winding (603) is surrounded on the tooth of adjacent two electric machine stator irons (601) side.
CN 201120288433 2011-08-10 2011-08-10 Flywheel energy storage apparatus Withdrawn - After Issue CN202167936U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120288433 CN202167936U (en) 2011-08-10 2011-08-10 Flywheel energy storage apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120288433 CN202167936U (en) 2011-08-10 2011-08-10 Flywheel energy storage apparatus

Publications (1)

Publication Number Publication Date
CN202167936U true CN202167936U (en) 2012-03-14

Family

ID=45803739

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201120288433 Withdrawn - After Issue CN202167936U (en) 2011-08-10 2011-08-10 Flywheel energy storage apparatus

Country Status (1)

Country Link
CN (1) CN202167936U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290911A (en) * 2011-08-10 2011-12-21 东南大学 Flywheel energy storing device of double-salient pole electro-magnetic motor
CN104065225A (en) * 2014-06-04 2014-09-24 华中科技大学 Multi-phase energy storing generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290911A (en) * 2011-08-10 2011-12-21 东南大学 Flywheel energy storing device of double-salient pole electro-magnetic motor
CN102290911B (en) * 2011-08-10 2013-05-01 东南大学 Flywheel energy storing device of double-salient pole electro-magnetic motor
CN104065225A (en) * 2014-06-04 2014-09-24 华中科技大学 Multi-phase energy storing generator

Similar Documents

Publication Publication Date Title
CN101577449B (en) Magnetic flux switching type transverse magnetic flux permanent magnetism wind mill generator
CN201378789Y (en) High-power density generator with adjustable magnetic flux
CN202167937U (en) Efficient flywheel energy storage apparatus
CN103607059A (en) Stator poly magnetic type magnetic flux switching transverse magnetic flux permanent magnet wind power generator
CN101527470B (en) Magneticflux-switching type composite excitation transverse-magneticflux wind powered generator
CN101741197B (en) Flux switching type magnetic-concentration transverse flux permanent magnetic wind generator
CN103762758A (en) Rotor magnet-gathering type horizontal magnetic-flow permanent-magnet disc wind driven generator
CN101752916B (en) Composite excitation permanent magnet wind power generator with combined stator and rotor sructure
CN101651395A (en) Sine wave current self-starting three-phase rare earth permanent-magnetism synchronous motor
CN101557150A (en) Permanent magnet synchronous direct-drive wind power generator without iron core
CN202309460U (en) High-capacity outer rotor three-side stator transverse magnetic flux permanent magnet wind-driven generator
CN202167936U (en) Flywheel energy storage apparatus
CN201378761Y (en) Constant-voltage output mixing excitation type magnetic flux switching wind power generator
CN102290910B (en) Flywheel energy storing device using memory type stator permanent magnet type motor
CN108448808B (en) Permanent magnet type magnetic suspension switched reluctance flywheel motor with sleeve pole shoe teeth axial split phase
CN102290911B (en) Flywheel energy storing device of double-salient pole electro-magnetic motor
CN201194346Y (en) Tangential magnetic steel permanent magnet motor
CN102122869A (en) Concentric double-stator structured direct-drive cage type induction generator system
CN202840895U (en) Low-cogging-torque flux-switching permanent magnet motor
CN201378785Y (en) Wind generator with high torque density
CN202260712U (en) 500 watt rare earth permanent magnet wind power generator
CN101488682A (en) Constant voltage outputting mixed excitation type magnetic flux switching wind power generator
CN101272064A (en) High-capacity light permanent-magnetic radial/axial rotor structure direct driving type aerogenerator
CN201621003U (en) Permanent magnet wind power generator
CN102355110A (en) High-capacity outer-rotor/trihedral-stator transverse-flux permanent magnet wind-driven generator

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20120314

Effective date of abandoning: 20130501

RGAV Abandon patent right to avoid regrant