CN102290911B - Flywheel energy storing device of double-salient pole electro-magnetic motor - Google Patents
Flywheel energy storing device of double-salient pole electro-magnetic motor Download PDFInfo
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- CN102290911B CN102290911B CN 201110227788 CN201110227788A CN102290911B CN 102290911 B CN102290911 B CN 102290911B CN 201110227788 CN201110227788 CN 201110227788 CN 201110227788 A CN201110227788 A CN 201110227788A CN 102290911 B CN102290911 B CN 102290911B
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- 238000004804 winding Methods 0.000 claims abstract description 46
- 230000005284 excitation Effects 0.000 claims description 48
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 19
- 238000009825 accumulation Methods 0.000 claims description 18
- 235000000396 iron Nutrition 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 2
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- 238000004146 energy storage Methods 0.000 description 28
- 230000005540 biological transmission Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 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 provides a flywheel energy storing device of a double-salient pole electro-magnetic motor. When the flywheel energy storing device does not transfer energy with the outside, a motor exciting winding is set in an open-circuit state so that no magnetic field remains in air gaps of the motor and no eddy-current loss and no magnetic hysteresis loss exist in the interior of the iron core of the motor, thus the energy consumption of the flywheel energy storing system can be obviously reduced, the energy storing time of a flywheel can be greatly prolonged and the overall energy conversion efficiency of the system and the security of the system can be improved. The device comprises an upper magnetic bearing (1), a vacuum cavity (2), a flywheel body (3), a shell (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 connecting 2n circular arc iron cores into a round shape, wherein the number n is a natural number; and an exciting winding (602) is arranged between every two circular arc iron cores, and an armature winding (603) is arranged on the gear of the inner circle of the motor stator iron core (601).
Description
Technical field
The invention belongs to the power storage technical field, specifically, what relate to is a kind of novel efficient flywheel energy storage apparatus.
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 the advantages such as secondary pollution because dynamic property is good, just is being subject to increasing attention.The basic principle of flywheel energy storage is, at first does the motor operation by motor and drives flywheel and accelerate, and converts electrical energy into kinetic energy and is stored on the flywheel rotor, when needing, makes generator operation by the flywheel drive motor again, and the kinetic energy in the flywheel is converted to electric energy.Because square being directly proportional of the kinetic energy that stores in the flywheel rotor and Speed of Reaction Wheels, therefore, the Speed of Reaction Wheels height of should trying one's best usually reaches tens thousand of rev/mins and very arrives hundreds thousand of rev/mins.Flywheel not with extraneous positive energy exchange, when namely being in holding state, in order to reduce the own loss of runner, usually adopting magnetic suspension bearing, and the flywheel chamber be evacuated, to reduce the friction loss of bearing and rotor.In order to improve energy conversion efficiency, be widely used magneto in the energy accumulation device for fly wheel.So, do not carry out the energy transmission with the external world at flywheel energy storage system, be that system is when being in the energy storage operating state, along with the flywheel High Rotation Speed, permanent magnetic field can be at inner eddy current loss and the magnetic hysteresis loss of producing of electric machine iron core, and this will constantly consume the energy of storing in the flywheel, and rotating speed is higher, magnetic field in the electric machine iron core is stronger, and then loss is larger.The waste that this not only causes energy has reduced the efficient of flywheel energy storage system integral body, makes the 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 simultaneously the heat radiation of flywheel energy storage system are proposed requirements at the higher level, so that the overall structure of flywheel energy storage system is more complicated, also requirements at the higher level are proposed manufacturing process.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 energy accumulation device for fly wheel that the purpose of this invention is to provide a kind of electric excitation biconvex electrode electric machine, when this flywheel energy storage system does not carry out the energy transmission with the external world, the motor excitation winding is placed open-circuit condition, make and do not have magnetic field in the motor gas-gap, then electric machine iron core inside is without eddy current loss and magnetic hysteresis loss, can significantly reduce the energy consumption of flywheel energy storage system, greatly prolong the energy storage time of flywheel, improve energy conversion efficiency and the Security of the system of entire system.
Technical scheme:For solving the problems of the technologies described above, the technical solution used in the present invention is: this device comprises magnetic bearing, vacuum chamber, flywheel body, shell, rotor, motor stator, magnetic bearing, flywheel rotating shaft; The up and down two ends of flywheel rotating shaft are separately positioned on magnetic bearing and the magnetic bearing, upper magnetic bearing and magnetic bearing are separately fixed at the up and down two ends 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, consists of 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 natural number, is provided with excitation winding between per two circular arc iron cores, and armature winding is positioned on the tooth of electric machine stator iron inner circle.Described rotor and motor stator adopt axially and arrange, and namely rotor is arranged on the flywheel body, and motor stator is arranged on the below of rotor, consist of the energy accumulation device for fly wheel of axial air-gap electricity excitation type double salient-pole electric machine.Rotor and motor stator are the double-salient-pole 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 natural number, is provided with excitation winding between per two blocks of segment cores, 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 technical scheme of the present invention to be:
1. work as flywheel and be in energy storage state, (the energy transmission refers to motor as motor, and the kinetic energy that converts electric energy to the flywheel body comes stored energy not carry out the energy transmission with the external world; Or motor is as generator, the kinetic energy of flywheel body is converted to electric energy to release energy) time, the excitation of motor is placed open-circuit condition, electric machine iron core inside is without magnetic field, generation eddy current loss and magnetic hysteresis loss have been avoided, prolong energy storage time, improved the energy conversion efficiency of flywheel energy storage system integral body.
2. because when flywheel energy storage system does not carry out the energy transmission, 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 more be conducive to improve the cooling condition of system.
3. whole device is simple in structure, and especially because motor adopts the double-salient-pole structure, and rotor is magnetic conductive iron only, structure is simple rigid very, is particularly suitable for high-speed cruising.This will more be conducive to improve 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
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is the integrally-built sectional view of energy accumulation device for fly wheel of the present invention.Wherein have: upper 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 among a kind of the present invention.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 among another kind of the present invention.Rotor 5 is arranged, electric machine stator iron 601, excitation winding 602 and armature winding 603 among the figure.
Need to prove that except two kinds of cited radial air gap formulas electricity excitation type double salient-pole electric machines of Fig. 2 and Fig. 3, energy accumulation device for fly wheel of the present invention 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.
Figure 4 shows that the cutaway view when this flywheel energy storage system uses axial air-gap type electricity excitation type double salient-pole electric machine.Wherein have: upper 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, for the ease of observing, only shown a coil of armature winding 603 among Fig. 5.
Figure 6 shows that the schematic three dimensional views of rotor 5 among Fig. 5.
Except the electric excitation type double salient-pole electric machine of the cited a kind of axial air-gap of Fig. 5, energy accumulation device for fly wheel of the present invention also can be adopted the axial air-gap type electricity excitation type double salient-pole electric machine with other types when using structure shown in Figure 4, enumerate no longer one by one at this.
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 present invention, 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 up and down two ends of flywheel rotating shaft 8 are separately positioned on magnetic bearing 1 and the magnetic bearing 7, upper magnetic bearing 1 and magnetic bearing 7 are separately fixed at the up and down two ends 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 outsides, consists of 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 natural number, is provided with excitation winding 602 between per two circular arc iron cores, and armature winding 603 is positioned on the tooth of electric machine stator iron 601 inner circles.
Described motor adopts radial air gap formula electricity excitation type double-salient-pole 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.Electric machine structure is as example in Fig. 2, and described rotor 5 structures are very simple, both without permanent magnet also without winding, be that folded forming pressed in simple magnetic conductive iron punching.Can as required, be made as straight trough rotor or skewed rotor.Described 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 to the external world carry out the energy transmission (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 pass into direct current, the excitation field direction that each excitation winding produces is as shown by arrows in FIG..Do not carry out the energy transmission with the external world and work as this flywheel energy storage system, when namely being in energy storage state, put excitation winding 602 in open-circuit condition, do not have magnetic field in the motor gas-gap this moment, therefore without 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 feature, does not enumerate one by one at this.
As shown in Figure 4, energy accumulation device for fly wheel of the present invention 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, does not repeat them here.
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, for the ease of observing, only shown a coil of armature winding 603 among Fig. 5.
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 feature, does not enumerate one by one at this.
Claims (3)
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 up and down two ends of flywheel rotating shaft (8) are separately positioned on magnetic bearing (1) and the magnetic bearing (7), upper magnetic bearing (1) and magnetic bearing (7) are separately fixed at the up and down two ends 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, consists of 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, number n is natural number, be provided with excitation winding (602) between per two circular arc iron cores, armature winding (603) is positioned on the tooth of electric machine stator iron (601) inner circle;
Rotor (5) and motor stator (6) are the double-salient-pole structure.
2. 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 up and down two ends of flywheel rotating shaft (8) are separately positioned on magnetic bearing (1) and the magnetic bearing (7), upper magnetic bearing (1) and magnetic bearing (7) are separately fixed at the up and down two ends of shell (4), described rotor (5) and motor stator (6) adopt axially and arrange, be that rotor (5) is arranged on the flywheel body (3), motor stator (6) is arranged on the below of rotor (5), consist of the energy accumulation device for fly wheel of axial air-gap electricity excitation type double salient-pole electric machine, rotor (5) and motor stator (6) are the double-salient-pole structure.
3. the energy accumulation device for fly wheel of electric excitation biconvex electrode electric machine as claimed in claim 2 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, number n is natural number, be provided with excitation winding (602) between per two blocks of segment cores (601), each group armature winding (603) is surrounded on the tooth of adjacent two electric machine stator irons (601) side.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110227788 CN102290911B (en) | 2011-08-10 | 2011-08-10 | Flywheel energy storing device of double-salient pole electro-magnetic motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110227788 CN102290911B (en) | 2011-08-10 | 2011-08-10 | Flywheel energy storing device of double-salient pole electro-magnetic motor |
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| CN102290911A CN102290911A (en) | 2011-12-21 |
| CN102290911B true CN102290911B (en) | 2013-05-01 |
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| CN105186740B (en) * | 2015-10-09 | 2018-01-23 | 清华大学 | A kind of inertia energy storage system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595772A (en) * | 2004-07-14 | 2005-03-16 | 华中科技大学 | Energy-storing phase modulation motor |
| CN101090202A (en) * | 2007-04-30 | 2007-12-19 | 华中科技大学 | Flexible AC transmitting system based on flywheel energy storage |
| JP2008043084A (en) * | 2006-08-08 | 2008-02-21 | Ntn Corp | Motor-integrated magnetic bearing device |
| CN201378789Y (en) * | 2009-03-18 | 2010-01-06 | 东南大学 | High-power density generator with adjustable magnetic flux |
| CN101699754A (en) * | 2009-10-28 | 2010-04-28 | 中国船舶重工集团公司第七一○研究所 | Magnetic suspension flywheel battery device |
| CN202167936U (en) * | 2011-08-10 | 2012-03-14 | 东南大学 | Flywheel energy storage apparatus |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595772A (en) * | 2004-07-14 | 2005-03-16 | 华中科技大学 | Energy-storing phase modulation motor |
| JP2008043084A (en) * | 2006-08-08 | 2008-02-21 | Ntn Corp | Motor-integrated magnetic bearing device |
| CN101090202A (en) * | 2007-04-30 | 2007-12-19 | 华中科技大学 | Flexible AC transmitting system based on flywheel energy storage |
| CN201378789Y (en) * | 2009-03-18 | 2010-01-06 | 东南大学 | High-power density generator with adjustable magnetic flux |
| CN101699754A (en) * | 2009-10-28 | 2010-04-28 | 中国船舶重工集团公司第七一○研究所 | Magnetic suspension flywheel battery device |
| CN202167936U (en) * | 2011-08-10 | 2012-03-14 | 东南大学 | Flywheel energy storage apparatus |
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