CN102255462B - Permanent magnet wind-driven generator with axial main magnetic path structure - Google Patents
Permanent magnet wind-driven generator with axial main magnetic path structure Download PDFInfo
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- CN102255462B CN102255462B CN201110215832.1A CN201110215832A CN102255462B CN 102255462 B CN102255462 B CN 102255462B CN 201110215832 A CN201110215832 A CN 201110215832A CN 102255462 B CN102255462 B CN 102255462B
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- permanent magnet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Abstract
The invention relates to a permanent magnet wind-driven generator with an axial main magnetic path structure. The wind wheel rotating direction of the permanent magnet wind-driven generator is parallel to the wind direction; annular double layers of cover plates are horizontally arranged on the lower part of a wind wheel; an outer rotor assembly is arranged between the two layers of cover plates and comprises an outer rotor shell which is vertically fixed between the two layers of cover plates; n permanent magnet units are uniformly distributed along the circumferential direction of the inner side of the outer rotor shell; the sections of the permanent magnet units along the vertical rotating direction are [-shaped; a stator assembly comprises m magnetic induction elements which are uniformly distributed along the circumferential direction of the outer side of a wheel hub casting; and the sections of the magnetic induction elements along the vertical rotating direction are C-shaped. The axial main magnetic path structure and a circumferential permeation bonding structure are arranged crosswise, so that a negative slope linear relation between the magnetic induction intensity and an air gap is realized, the air gap sensitivity of the generator is greatly improved, the structural design of the permanent magnet wind-driven generator is easier to realize, the generator cost is lowered greatly, and convenience is brought to practical engineering popularization and application.
Description
Technical field
The invention belongs to the sub-rare earth permanent magnet wind-driven generator technical field of unofficial biography, relate to the coaxial direct drive generator with axial main magnetic path permanent magnet wind generating device of a kind of vertical axis wind turbine.
Background technology
Wind energy is as a kind of renewable, free of contamination green energy resource, and reserves are very abundant, becomes gradually a kind of new forms of energy that the countries in the world Devoting Major Efforts To Developing utilizes.In recent years, wind power generation shared ratio in the energy total amount in the world improves gradually, and wind-powered electricity generation has become the energy development mode of with fastest developing speed, tool development prospect in the world.Large-scale developing and utilizing of wind energy, will effectively reduce fossil energy consumption, reduce greenhouse gas emission, protection of the environment.Rise resistance and merge wing plate type vertical axis rotor (application number: 201010572822.9, publication No.: the resistance and the lift efficiency that CN102022259) have merged Wind Power Utilization, have start that wind speed is low, speed promote fast, wind energy utilization is high, with low cost and the advantage such as reliable, will provide vertical axis wind power generation wind wheel with low cost for Wind Power Utilization.
At present, traditional permanent-magnetic wind driven generator group great majority between stator and rotor adopt in the tangential structures of permanent magnet alternately of rotating, and make the overall startup magnetic resistance moment of generator larger, and wind power conversion efficiency reduces, and make the acting of can not generating electricity of the gentle breeze energy.
Summary of the invention
The object of the invention is to provide the permanent-magnetic wind-power generator with axial main magnetic circuit of the coaxial direct drive of vertical axis rotor, larger in order to the overall startup magnetic resistance moment that solves existing permanent-magnetic wind driven generator, wind power conversion efficiency reduces, the problem that makes the gentle breeze energy can not generate electricity and do work.
For achieving the above object, the solution of the present invention is: permanent-magnetic wind-power generator with axial main magnetic circuit, described generator is the external rotor vertical axis aerogenerator, be provided with the Ringlike double-layer cover plate in the wind wheel lower horizontal, be provided with outer rotor component between two-layer cover plate, outer rotor component comprises the outer rotor case be vertically fixed between two-layer cover plate, and described outer rotor case inner circumferential is evenly distributed with n permanent magnet unit, the cross section of the vertical rotary direction of permanent magnet unit be "
［ "type, "
［ "type permanent magnet unit bottom is fixed on the outer rotor case inboard, "
［ "type permanent magnet unit both ends are respectively the N utmost point and the S utmost point, adjacent two "
［ "the type permanent magnet unit NS pole reversal is arranged; Be fixed with stator module by hub cast on described vertical axis, described stator module is included in the uniform m of a hub cast external circumferential magnetic induction part, the cross section of the vertical rotary direction of magnetic induction part is the C type, the magnetic induction part bottom is fixed on the hub cast outside, all be equipped with coil on the two ends arm of magnetic induction part, the magnetic induction part both ends and described "
［ "the both ends of type permanent magnet unit are oppositely arranged at correspondence position, and wherein n>m, and n and m be prime number each other.
Described "
［ "the type permanent magnet unit is bonded in the mounting groove of outer rotor case inboard, and described outer rotor case consists of NULL.
Described "
［ "the type permanent magnet unit consists of the magnetic conduction bar of bottom and the permanent magnet blocks at both ends, and permanent magnet blocks is bonded on the magnetic conduction bar.
Described magnetic conduction bar is made by electrician's clean steel.
Described permanent magnet blocks is made by the Nd-Fe-B rare-earth permanent magnet.
Shown in magnetic induction part adopt silicon steel to make.
Described n=80, m=19.
Be fixedly connected with by ring flange between the upper cover plate of described Ringlike double-layer cover plate and wind wheel, be bolted between upper cover plate and flange.
Permanent-magnetic wind driven generator of the present invention, the negative slope linear dependence presented between magnetic flux density and air gap.This has changed the traditional Mathematical Modeling of relation---inverse square function between magnetic flux density and air gap fully, thereby greatly improved the air gap sensitiveness of generator, make the structural design of permanent magnet generator, the key techniques such as process route is determined, processing and manufacturing are more prone to realize, decrease generator cost simultaneously, be convenient to that engineering is actual to be applied.
The accompanying drawing explanation
Fig. 1 is axial main magnetic circuit electric generator structure schematic diagram;
The axial section that Fig. 2 is generator;
Fig. 3 is vertical axis aerogenerator assembling overall appearance figure;
Fig. 4 is main magnetic circuit magnetic line of force distribution schematic diagram;
The schematic diagram of Fig. 5 for the generator of embodiment is tested;
Fig. 6 is the test data fitting curve between magnetic flux density and air gap.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Permanent-magnetic wind-power generator with axial main magnetic circuit as shown in Figure 1, Figure 2, Figure 3 shows, wind wheel 30 bottoms rigidly fix by the upper cover plate 2 use bolts 3 of ring flange 1 and generator, be fixed with outer rotor case 4 between upper cover plate 2 and lower cover 7, rely on hexagon socket head cap screw 5 to fix.Outer rotor case 4 is processed uniform n (experimental test is with 80) magnetic pole mounting groove again by the NULL forging forming in inside, the magnetic pole logarithm of the number of magnetic pole mounting groove and generator is identical.Permanent magnet unit 6 is bonded in by the osmosis type anaerobic adhesive in the mounting groove of the sub-housing of unofficial biography 4 inside, the cross section perpendicular to rotation direction of permanent magnet unit 6 be "
［ "type, permanent magnet unit 6 bottoms are fixed on outer rotor case 4 inboards, and permanent magnet unit 6 both ends are respectively the N utmost point and the S utmost point, permanent magnet unit 6 according to SN polarity between the upper and lower every oppositely arranging, put in order as shown in Figure 1, Fig. 1 is the section of generator along the parallel rotating direction.
Above-mentioned permanent magnet unit 6, except adopting above-mentioned shape (channel-section steel shape), can also be used C type or U-shaped.Experiment shows, "
［ "the type effect is better.
Corresponding external rotor, generator also comprises internal stator, the internal stator assembly is fixed on vertical axis 10 by hub cast 8, the internal stator assembly comprises m the magnetic induction part 9 that (experimental test is with 19) silicon steel sheet forms that is distributed on hub cast 8 outsides, the vertical rotation direction cross section of magnetic induction part 9 is C types: winding coil 9-1 is sleeved on two arms of magnetic induction part 9, and silicon steel unit, the bottom 9-2 of magnetic induction part 9 embeds hub cast 8.Wherein n>m, and n and m be prime number each other.
As shown in Figure 2, in outer rotor permanent magnet unit 6 with internal stator magnetic induction part 9 in corresponding position, their polar end is relative in twos, the magnetic line of force of a pair of magnetic pole distributes as shown in Figure 4.So, the main magnetic circuit structure of this wind wheel generator is that the permanent magnet unit of external rotor and the magnetic induction unit of internal stator form closed main magnetic circuit at the major axes orientation of generator, and the air gap tangential direction by SN polarity interval reversed arrangement on the circumference of axle section becomes leakage field direction (in perpendicular to the vertical axis plane).The permanent magnet arrangement pitch of leakage field direction is more than 5 times of main magnetic circuit direction air gap, thereby guarantees the magnetic line of force close intensity of magnetic of main magnetic circuit direction vertically.Through test determination (hereinafter specifically narration), the magnetic flux density of its main magnetic direction can reach ten times of left and right of the magnetic flux density of leakage field direction.
Generator with axial main magnetic path permanent magnet wind generating device as shown in Figure 3, wind drive wind wheel 30 rotates, the generator external rotor be fixed together with this wind wheel 30 rotates thereupon, and do cutting magnetic line movement between the generator internal stator that wind wheel vertical axis 10 is fixed together and the generator external rotor of rotation, thereby generation induced potential, draw by binding post, just produced electric current.Winding coil 9-1 draws a power source loads by the binding post interval, and the coil of other position is drawn two power source loads in addition, with this, forms three-phase alternating current output.
Further, in order to save permanent magnetic material, alleviate permanent magnet weight, as shown in Figure 2,4, permanent magnet unit 6 can adopt Split type structure.By cuboid electrician clean steel 6-1, S level magnet steel 6-2, N level magnet steel 6-3 through the osmosis type anaerobic adhesive bonding and form "
［ "the type permanent magnet unit.
Generator to the present embodiment is tested, and the test detail is as follows:
1, tester: CTS27 type numeral teslameter (the hall probe minimum thickness is 0.2mm), clearance gauge.Wherein, gaussmeter is used for measuring the magnetic flux density of main magnetic, leakage field direction, and clearance gauge is used for measuring the size of gaps of main magnetic direction.
2, testing procedure: choosing arbitrarily one of them stator (is magnetic induction unit mentioned above, 9-2 as shown in Figure 5), take this stator as benchmark, turn clockwise and measure the magnetic flux density of each rotor and the air gap of this stator, main magnetic direction and leakage field direction, and the record data of surveying.As shown in Figure 5, X is leakage field direction measuring point to concrete test position, and Y is leakage field direction measuring point.
Find by test data, between main magnetic direction magnetic flux density Hm and air gap delta, have linear relationship, therefore choose following formula Hm=simple linear regression analysis Mathematical Modeling of A δ+B, investigate the internal relation of magnetic flux density Hm and air gap delta.
As Fig. 6, test data is carried out to the processing of least square method data fitting according to the Mathematical Modeling of above formula and can estimate that parameter is as follows: straight line L slope is A ≈-300, and intercept is B ≈ 1300, and coefficient correlation is 0.9043.Figure 6 shows that the test data fitting curve between magnetic flux density and air gap, between the test data of its main magnetic direction magnetic flux density Hm and air gap delta, by the least square method data fitting, exist linear relationship, coefficient correlation is up to 0.9.Result of the test shows, after the permanent magnet arrangement pitch of leakage field direction reaches 20 times of main magnetic circuit direction air gaps, will there be linear relationship in main magnetic direction magnetic flux density Hm and air gap delta and deteriorate to traditional Mathematical Modeling.
As can be seen from the figure, in the generator of the present embodiment, the negative slope linear dependence presented between magnetic flux density and air gap.This has changed the traditional Mathematical Modeling of relation---inverse square function between magnetic flux density and air gap fully, thereby greatly improved the air gap sensitiveness of generator, make the structural design of permanent magnet generator, the key techniques such as process route is determined, processing and manufacturing are more prone to realize, decrease generator cost simultaneously, be convenient to that engineering is actual to be applied.
Claims (8)
1. permanent-magnetic wind-power generator with axial main magnetic circuit, described generator is the external rotor vertical axis aerogenerator, it is characterized in that, be provided with the Ringlike double-layer cover plate in the wind wheel lower horizontal, be provided with outer rotor component between two-layer cover plate, outer rotor component comprises the outer rotor case be vertically fixed between two-layer cover plate, described outer rotor case inner circumferential is evenly distributed with n permanent magnet unit, the cross section of the vertical rotary direction of permanent magnet unit is " ［ " type, " ［ " type permanent magnet unit bottom is fixed on the outer rotor case inboard, " ［ " type permanent magnet unit both ends are respectively the N utmost point and the S utmost point, adjacent two " arrange by ［ " type permanent magnet unit NS pole reversal, be fixed with stator module by hub cast on described vertical axis, described stator module is included in the uniform m of a hub cast external circumferential magnetic induction part, the cross section of the vertical rotary direction of magnetic induction part is the C type, the magnetic induction part bottom is fixed on the hub cast outside, all be equipped with coil on the two ends arm of magnetic induction part, magnetic induction part both ends and described " both ends of ［ " type permanent magnet unit are oppositely arranged at correspondence position, and wherein n>m, and n and m be prime number each other, the permanent magnet unit of external rotor and the magnetic induction unit of internal stator form closed main magnetic circuit at the major axes orientation of generator, air gap tangential direction by SN polarity interval reversed arrangement on the circumference of axle section becomes the leakage field direction, the permanent magnet arrangement pitch of leakage field direction is more than 5 times of main magnetic circuit direction air gap, below 20 times, thereby guarantee the magnetic line of force close intensity of magnetic of main magnetic circuit direction vertically, thereby make the negative slope linear dependence presented between magnetic flux density and air gap, improved the air gap sensitiveness of generator.
2. permanent-magnetic wind-power generator with axial main magnetic circuit according to claim 1, is characterized in that, described " ［ " type permanent magnet unit is bonded in the mounting groove of outer rotor case inboard, and described outer rotor case consists of NULL.
3. permanent-magnetic wind-power generator with axial main magnetic circuit according to claim 2, is characterized in that, described " ［ " type permanent magnet unit consists of the magnetic conduction bar of bottom and the permanent magnet blocks at both ends, and permanent magnet blocks is bonded on the magnetic conduction bar.
4. permanent-magnetic wind-power generator with axial main magnetic circuit according to claim 3, is characterized in that, described magnetic conduction bar is made by electrician's clean steel.
5. permanent-magnetic wind-power generator with axial main magnetic circuit according to claim 3, is characterized in that, described permanent magnet blocks is made by the Nd-Fe-B rare-earth permanent magnet.
6. permanent-magnetic wind-power generator with axial main magnetic circuit according to claim 1, is characterized in that, shown in magnetic induction part adopt silicon steel to make.
7. permanent-magnetic wind-power generator with axial main magnetic circuit according to claim 1, is characterized in that, described n=80, m=19.
8. permanent-magnetic wind-power generator with axial main magnetic circuit according to claim 1, is characterized in that, between the upper cover plate of described Ringlike double-layer cover plate and wind wheel, by ring flange, is fixedly connected with, and between upper cover plate and ring flange, is bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215832.1A CN102255462B (en) | 2011-07-29 | 2011-07-29 | Permanent magnet wind-driven generator with axial main magnetic path structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215832.1A CN102255462B (en) | 2011-07-29 | 2011-07-29 | Permanent magnet wind-driven generator with axial main magnetic path structure |
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| CN102255462A CN102255462A (en) | 2011-11-23 |
| CN102255462B true CN102255462B (en) | 2014-01-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103997177B (en) * | 2014-06-11 | 2017-01-04 | 北京理工大学 | A kind of single-phase U-shaped stator tooth outer rotor switch magnetic-resistance electromotor |
| CN105364604B (en) * | 2015-12-15 | 2017-12-26 | 东南大学 | A kind of non-contact permanent magnetism loading device of machine tool chief axis |
| RU2645949C2 (en) * | 2016-01-20 | 2018-02-28 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный технический университет" | Inductor-type generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4588914A (en) * | 1984-06-05 | 1986-05-13 | Westinghouse Electric Corp. | Permanent magnet rotor for high speed motors and generators |
| CN200996357Y (en) * | 2006-11-20 | 2007-12-26 | 张大鹏 | Wind-power driven generater |
| CN101539103A (en) * | 2008-04-10 | 2009-09-23 | 河南科技大学 | Stall-controllable permanent magnet wind turbine |
| CN202167910U (en) * | 2011-07-29 | 2012-03-14 | 河南科技大学 | Permanent-magnetic wind-power generator with axial main magnetic circuit structure |
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2011
- 2011-07-29 CN CN201110215832.1A patent/CN102255462B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4588914A (en) * | 1984-06-05 | 1986-05-13 | Westinghouse Electric Corp. | Permanent magnet rotor for high speed motors and generators |
| CN200996357Y (en) * | 2006-11-20 | 2007-12-26 | 张大鹏 | Wind-power driven generater |
| CN101539103A (en) * | 2008-04-10 | 2009-09-23 | 河南科技大学 | Stall-controllable permanent magnet wind turbine |
| CN202167910U (en) * | 2011-07-29 | 2012-03-14 | 河南科技大学 | Permanent-magnetic wind-power generator with axial main magnetic circuit structure |
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