CN101404433B - Miniature direct-drive permanent magnet synchronous aerogenerator and its small-sized wind power generation system - Google Patents

Miniature direct-drive permanent magnet synchronous aerogenerator and its small-sized wind power generation system Download PDF

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Publication number
CN101404433B
CN101404433B CN2008102189455A CN200810218945A CN101404433B CN 101404433 B CN101404433 B CN 101404433B CN 2008102189455 A CN2008102189455 A CN 2008102189455A CN 200810218945 A CN200810218945 A CN 200810218945A CN 101404433 B CN101404433 B CN 101404433B
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China
Prior art keywords
stator
winding
main
generator
rotor
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CN2008102189455A
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Chinese (zh)
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CN101404433A (en
Inventor
徐继鸿
吴金华
赵少俊
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鹤山市信利带钢有限公司
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Priority to CN2008102189455A priority Critical patent/CN101404433B/en
Priority claimed from PCT/CN2009/070462 external-priority patent/WO2010051691A1/en
Publication of CN101404433A publication Critical patent/CN101404433A/en
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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
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The invention discloses a small-sized direct-drive permanent magnetism synchronous aerogenerator and a generating system thereof. The aerogenerator comprises a shell which is supported with a rotating shaft by a bearing; a main stator and an auxiliary stator are fixed in the shell, and the main stator is sheathed on the circumstance of the auxiliary stator; a main stator winding and an auxiliary stator winding are arranged respectively on the main stator and the auxiliary stator, and a rotor which is connected with the rotating shaft is arranged between the main stator and the auxiliary stator; an outer permanent magnet and an inner permanent magnet which are corresponding to the positions of the main stator and the auxiliary stator are respectively arranged on the rotor; one group of winding in the auxiliary stator winding is connected with a direct current power supplying regulation control end. The generating system also comprises an electrical energy memorizer, a direct current power supplying adjustor, a controller and the like, the aerogenerator can adopt a method of power regulation and energy compensation to keep the stability of the wind energy generating system, thus leading the working efficiency of the whole generating system to be effectively improved.

Description

A kind of miniature direct-drive permanent magnet synchronous aerogenerator and miniature wind power generation system thereof
Technical field
The present invention relates to a kind of wind-driven generator and wind generator system, particularly a kind of small-sized wind power generator and wind generator system thereof.
Background technology
Wind power generation is fastest-rising a kind of in the renewable energy resources technology; Common have alternating current asynchronous generator, a double-fed asynchronous generator; In wind power system, need gear up, also carbon brush and slip ring to be arranged for double-fed asynchronous generator; This wind power system manufacturing cost is high, poor reliability, and noise pollution is very serious.
Non-gear box, directly drive, non-brushing receives people's attention, new wind generator system scheme is a variable-speed operation, what become the adjusting of slurry square, the slow-speed of revolution, high efficiency, High Power Factor directly drives multipole magneto alternator, becomes the current research hot of research and development.
Wherein, miniature wind power generation system is little because of its volume, unit price is low, thus suitable employing Variable Pitch governor motion, thereby prior art generally is to adopt the fixedly mode of pitch.But because wind speed can constantly change, existing miniature wind power generation system can not be suitable for, its job insecurity, unreliable, and wind energy utilization is low.
In addition, the employing multiple-grooved multipolar dynamo of present wind-driven generator, pairing number of stator slots is many; For satisfying technological requirement; Stator and rotor size will be made very greatly, and with the frequency that makes it to obtain to need, wind-force changes the potential fluctuation that causes because moment of inertia can be stabilized greatly.But; The multipole structure fabrication technology of this multiple-grooved is complicated; Unstable properties, thereby can not reach best result of use, and also there is the shortcoming that own vol is big, cost is high in this motor; Also need being used of reduction box simultaneously, thereby make the cost of small-sized wind power generator further not reduce.And have technological prejudice traditionally, and think that structure relatively simply lacks the few electrode structure of groove and can cause in the use that radial electromagnetic force is excessive, vibrations are violent and the big problem of noise, only be used for small-sized or microgenerator all the time.The generator of low speed high torque normally adopts the multiple-grooved multi-polar structure of relative complex, and structure is relatively simply lacked the record that the few electrode structure of groove does not use and attempts in the generator of low speed high torque.
In addition; Be CN101017998A at publication number, open day be to disclose a kind of direct-drive type excitation wind-driven generator that adopts double-stator structure in the patent documentation on August 15th, 2007, it realizes improving power density through double-stator structure, catches maximal wind-energy; Though reach certain result of use; But, adopt the blower fan of this kind structure can only improve power density, job insecurity under the situation of wind speed wide variety merely; And under the situation of simple raising power density, manufacturing cost is too high.
Summary of the invention
In order to solve the problems of the technologies described above, the purpose that the present invention wants be to provide a kind of simple in structure, efficient is high, a kind of stably miniature direct-drive permanent magnet synchronous aerogenerator of running.
The another one purpose be to provide a kind of simple in structure, with low cost, use reliable, wind energy utilization is high, miniature wind power generation system stably turns round.
A kind of miniature direct-drive permanent magnet synchronous aerogenerator; Comprise casing, casing has rotating shaft through Bearing Installation, is mounted with main stator and secondary stator in the casing; Main stator is enclosed within the periphery of secondary stator; Main stator winding and secondary stator winding are arranged respectively on main stator and the secondary stator, be provided with the rotor that is connected with rotating shaft between main stator and the secondary stator, have on the said rotor respectively and main stator and corresponding outer permanent magnet of secondary stator and interior permanent magnet; A wherein phase winding of secondary stator winding is connected with DC power supply and regulates control end; Big at wind speed, when generator moves more than rated speed, regulate control through DC power supply and bring in this phase winding to secondary stator winding and carry out DC power supply and regulate, to realize the torque damp type speed regulation of generator.
Further, described stator and rotor are the few electrode structure of few groove.
A kind of miniature wind power generation system comprises wind energy conversion system, generator and energy storage, and wind energy conversion system directly is connected with generator; Said generator is the direct-drive permanent-magnetism synchronous generator, and generator comprises casing, and casing has rotating shaft through Bearing Installation; Be mounted with main stator and secondary stator in the casing; Main stator is enclosed within the periphery of secondary stator, and main stator winding and secondary stator winding are arranged respectively on main stator and the secondary stator, is provided with the rotor that is connected with rotating shaft between main stator and the secondary stator; Have on the said rotor respectively and main stator and corresponding outer permanent magnet of secondary stator and interior permanent magnet; A wherein phase winding of secondary stator winding is connected with DC power supply and regulates control end, and the output of main stator winding and secondary stator winding is connected with power consumption equipment with energy storage through cable, and DC power supply is regulated control end and is connected with the DC power supply adjuster; The DC power supply adjuster connects controller; The input of controller connects wind energy conversion system, wind energy conversion system is carried out speed detect, and is big at wind speed, when generator moves more than rated speed; This phase winding of bringing in secondary stator winding through DC power supply adjusting control carries out the DC power supply adjusting, to realize the torque damp type speed regulation of generator.
Further, described stator and rotor are the few electrode structure of few groove.
The invention has the beneficial effects as follows: because this motor adopts double-stator structure, can adopt the method for power adjustments and energy compensating to keep the stable of wind power generation system, carry out torque adjustment by secondary stator and rotor; Realize the speed regulation of torque damp type, solved the insurmountable technical barrier of above-mentioned direct-drive type excitation dual stator wind power machine, power back-off is carried out in generating when wind-force is not enough; In the rated speed operation, main stator is that generator is directly supplied power, secondary stator idle running; The operating efficiency of whole generating system can effectively improve; And the generator of electricity generation system can stable operation in the broad wind speed range, utilizes wind energy more efficiently, and operating process is simple.Further; Described stator and rotor to realize the low-speed big input, have high power density for the few electrode structure of few groove; Can cancel gear drive; Both reduce the overall volume of wind generator system, and can avoid the gear drive wearing and tearing to cause breaking down again, improved the operating efficiency of whole generating system.And should lack electrode structure aspect the raising power density by few groove, reach the effect of internal stator in the above-mentioned direct-drive type excitation dual stator wind power machine, and better effects if, manufacturing cost can effectively reduce widely, has great economic benefit.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 is a generator Structure sketch map of the present invention;
Fig. 2 is the structural representation of electricity generation system of the present invention.
Embodiment
With reference to Fig. 1; A kind of miniature direct-drive permanent magnet synchronous aerogenerator of the present invention comprises casing 1, and casing 1 has rotating shaft 2 through Bearing Installation; Be mounted with main stator 3 and secondary stator 4 in the casing 1; Main stator 3 is enclosed within the periphery of secondary stator 4, on main stator 3 and the secondary stator 4 main stator winding 5 and secondary stator winding 6 is arranged respectively, is provided with the rotor 7 that is connected with rotating shaft 2 between main stator 3 and the secondary stator 4; Have on the said rotor 7 respectively and main stator 3 and secondary stator 4 corresponding outer permanent magnets 8 and interior permanent magnets 9, a wherein phase winding of secondary stator winding 6 is connected with DC power supply adjusting control end.
Further, as preferred implementation of the present invention, motor stator and rotor structure are simple, and number of poles and groove are counted optimization and cooperated, and described stator and rotor are the few electrode structure of few groove, and it has high power density.Specifically can be following, said main stator is 9 groove structures, said rotor is 8 utmost points or 10 electrode structures.
In addition, further, said stator winding is a three-phase, and 3 groups of windings of three-phase are concentrated for 120 ° and embedded.
A kind of miniature wind power generation system of the present invention comprises wind energy conversion system, generator and energy storage, and wind energy conversion system directly is connected with generator; Said generator is the direct-drive permanent-magnetism synchronous generator, and generator comprises casing 1, and casing 1 has rotating shaft 2 through Bearing Installation; Be mounted with main stator 3 and secondary stator 4 in the casing 1; Main stator 3 is enclosed within the periphery of secondary stator 4, on main stator 3 and the secondary stator 4 main stator winding 5 and secondary stator winding 6 is arranged respectively, is provided with the rotor 7 that is connected with rotating shaft 2 between main stator 3 and the secondary stator 4; Have on the said rotor 7 respectively and main stator 3 and secondary stator 4 corresponding outer permanent magnets 8 and interior permanent magnets 9; A wherein phase winding of secondary stator winding 6 is connected with DC power supply and regulates control end, and the output of main stator winding 5 and secondary stator winding 6 is connected with power consumption equipment with energy storage through cable, wherein; The output of secondary stator winding 6 is connected on the cable through power switch; DC power supply is regulated control end and also is connected with the DC power supply adjuster, and the DC power supply adjuster connects controller, and the other end connects energy storage through the powered by direct current switch; The input of controller connects wind energy conversion system, wind energy conversion system is carried out speed detect.
As shown in Figure 1, described stator and rotor can be the few electrode structure of few groove.Be specially, said main stator, secondary stator are 9 groove structures, and said rotor is 8 utmost points or 10 electrode structures.Preferably, said stator winding is a three-phase, and 3 groups of windings of three-phase are concentrated for 120 ° and embedded.
Because this generator belongs to the few electrode structure of few groove; Be the high density magnetic circuit; Stator winding circle is than most ten times of multipole magneto alternator, and making full use of space, groove crack increases umber of turn to obtain under the low cruise situation, producing higher back-emf voltage, under low-speed conditions; Can directly export 220V voltage; System design is constant speed, constant frequency, fixedly pitch, double-stator and double-rotor structure, and control mode adopts the method for power adjustments and energy compensating to keep stablizing of system, so the present invention is a kind of novel wind generator system.
Adopt the structure of above-mentioned pair of stator and rotor, can carry out DC power supply to the associated components of secondary stator and regulate, can have the effect of torque damp type speed regulation.
When wind speed is suitable, when rated speed was moved, main motor was that generator is directly supplied power, secondary stator idle running;
When wind speed is bigger, when more than rated speed, moving, one of secondary stator winding is supplied direct current, size of current makes it to become the speed regulation of torque damp type by the decision of rotation speed of fan feedback;
Less when wind speed, when below rated speed, moving, secondary stator winding drops into generator operation, and the cable of its electric energy and main motor is incorporated into the power networks, and this kind operation is the compensation of power adjustments formula.
In addition, generator of the present invention and system thereof can promote frequency of supply through the frequency preset device to the power set that frequency requirement is arranged, for the use of can directly supplying power of frequency no requirement (NR) in use.
In addition, the starting reactance square causes by slot effect, in the test of the present invention its influence minimum, the stability of rotation stator does not need skewed slot; And the umber of turn several times are higher than multipolar generator, and back-emf voltage is also very high, and are little through the current ratio multipolar dynamo of lead, and electric current is the principal element of heating; Electric current is little favourable to dispelling the heat, and simultaneously, this generator is a low-frequency generator; The motor iron loss seldom so can not generate heat, can make the physical property of magnet steel not be hit and influences.
Aspect control technology, wind speed has fluctuation at random, and is little when big when causing wind energy utilization, therefore a control mode will be arranged, capturing wind energy to greatest extent when guaranteeing the quality of power supply through control, and wind power system of the present invention has higher efficient.
Aspect economy, electric generator structure is simple, low cost of manufacture, and because of non-gear box and blade torque changing apparatus, operational reliability improves, and in designed life, need not safeguard.
This system goes for the small water conservancy electricity consumption in decentralized power supply, independently-powered, farmland, reduces the construction investment of centrally connected power supply, and the B.O.T.U. cost of miniature wind power generation system is lower than the coal electricity cost of centrally connected power supply.
Owing to adopted the generator of said structure stator and rotor, can adopt the method for power adjustments and energy compensating to keep the stable of wind power generation system, carry out torque adjustment by secondary stator; Keep constant speed and when wind-force is not enough generating carry out power back-off, move in rated speed; Main motor is that generator is directly supplied power; Secondary stator idle running, the operating efficiency of whole generating system can effectively improve, and the generator of electricity generation system can stable operation in the broad wind speed range; Utilize wind energy more efficiently, operating process is simple.

Claims (8)

1. miniature direct-drive permanent magnet synchronous aerogenerator; Comprise casing, casing has rotating shaft through Bearing Installation, it is characterized in that: be mounted with main stator and secondary stator in the casing; Main stator is enclosed within the periphery of secondary stator; Main stator winding and secondary stator winding are arranged respectively on main stator and the secondary stator, be provided with the rotor that is connected with rotating shaft between main stator and the secondary stator, have on the said rotor respectively and main stator and corresponding outer permanent magnet of secondary stator and interior permanent magnet; A wherein phase winding of secondary stator winding is connected with DC power supply and regulates control end; Big at wind speed, when generator moves more than rated speed, regulate control through DC power supply and bring in this phase winding to secondary stator winding and carry out DC power supply and regulate, to realize the torque damp type speed regulation of generator.
2. a kind of miniature direct-drive permanent magnet synchronous aerogenerator according to claim 1 is characterized in that: described stator and rotor are the few electrode structure of few groove.
3. a kind of miniature direct-drive permanent magnet synchronous aerogenerator according to claim 2 is characterized in that: said main stator and secondary stator are 9 groove structures, and said rotor is 8 utmost points or 10 electrode structures.
4. according to claim 1,2 or 3 described a kind of miniature direct-drive permanent magnet synchronous aerogenerators, it is characterized in that: said stator winding is a three-phase, and 3 groups of windings of three-phase are concentrated for 120 ° and embedded.
5. a miniature wind power generation system comprises wind energy conversion system, generator and energy storage, and wind energy conversion system directly is connected with generator; It is characterized in that: said generator is the direct-drive permanent-magnetism synchronous generator, and generator comprises casing, and casing has rotating shaft through Bearing Installation; Be mounted with main stator and secondary stator in the casing; Main stator is enclosed within the periphery of secondary stator, and main stator winding and secondary stator winding are arranged respectively on main stator and the secondary stator, is provided with the rotor that is connected with rotating shaft between main stator and the secondary stator; Have on the said rotor respectively and main stator and corresponding outer permanent magnet of secondary stator and interior permanent magnet; A wherein phase winding of secondary stator winding is connected with DC power supply and regulates control end, and the output of main stator winding and secondary stator winding is connected with power consumption equipment with energy storage through cable, and DC power supply is regulated control end and is connected with the DC power supply adjuster; The DC power supply adjuster connects controller; The input of controller connects wind energy conversion system, wind energy conversion system is carried out speed detect, and is big at wind speed, when generator moves more than rated speed; This phase winding of bringing in secondary stator winding through DC power supply adjusting control carries out the DC power supply adjusting, to realize the torque damp type speed regulation of generator.
6. a kind of miniature wind power generation system according to claim 5 is characterized in that: described stator and rotor are the few electrode structure of few groove.
7. a kind of miniature wind power generation system according to claim 5 is characterized in that: said main stator and secondary stator are 9 groove structures, and said rotor is 8 utmost points or 10 electrode structures.
8. a kind of miniature wind power generation system according to claim 5 is characterized in that: said stator winding is a three-phase, and 3 groups of windings of three-phase are concentrated for 120 ° and embedded.
CN2008102189455A 2008-11-07 2008-11-07 Miniature direct-drive permanent magnet synchronous aerogenerator and its small-sized wind power generation system CN101404433B (en)

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CN2008102189455A CN101404433B (en) 2008-11-07 2008-11-07 Miniature direct-drive permanent magnet synchronous aerogenerator and its small-sized wind power generation system
PCT/CN2009/070462 WO2010051691A1 (en) 2008-11-05 2009-02-18 Direct-drive permanent magnet synchronous small wind generator

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CN101404433B true CN101404433B (en) 2012-05-02

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WO2010051691A1 (en) * 2008-11-05 2010-05-14 鹤山市鹤龙机电有限公司 Direct-drive permanent magnet synchronous small wind generator
CN102005832B (en) * 2010-10-15 2014-04-23 深圳市科瑞悦电气设备有限公司 Wind power generating device
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CN103023245A (en) * 2012-12-26 2013-04-03 国电联合动力技术有限公司 Double-bearing support double-stator switch magnetic-resistance wind power generator and unit system thereof
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CN103929029A (en) * 2014-04-21 2014-07-16 顾善德 Compressor
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CN106440544A (en) * 2015-08-05 2017-02-22 江苏金源锻造股份有限公司 Wind-driven air conditioner applicable to various wind speeds
CN106469965B (en) * 2015-08-05 2019-04-12 江苏金源高端装备股份有限公司 A kind of wind-driven generator power supply system
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CN105222346B (en) * 2015-09-29 2018-04-17 江苏金源高端装备股份有限公司 A kind of boiler powered by wind-driven generator
CN105356702A (en) * 2015-12-07 2016-02-24 许昌杰成电气有限公司 Permanent magnetic synchronous generator set
CN106130280A (en) * 2016-06-30 2016-11-16 江苏金陵永磁产业研究院有限公司 A kind of double-stator permanent magnet formula composite wind power generator
CN107276350B (en) * 2017-07-24 2019-12-31 江苏大学 Double-stator hybrid excitation motor
CN108736677A (en) * 2018-08-08 2018-11-02 合肥中庆投资有限公司 A kind of bimorph transducer variable speed permanent magnetism synchronous driving system

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