CN102312776B - Electromagnetic brake device for wind power generator - Google Patents
Electromagnetic brake device for wind power generator Download PDFInfo
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- CN102312776B CN102312776B CN2011102408187A CN201110240818A CN102312776B CN 102312776 B CN102312776 B CN 102312776B CN 2011102408187 A CN2011102408187 A CN 2011102408187A CN 201110240818 A CN201110240818 A CN 201110240818A CN 102312776 B CN102312776 B CN 102312776B
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- fan
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- metal
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses an electromagnetic brake device for a wind power generator. A wind speed instrument monitors the environment wind speed, a fan rotating speed test instrument monitors the rotating speed of blades of a fan, a wind speed instrument is connected with a controller, the fan rotating speed test instrument is connected with the controller, the controller is connected with a fan coil through an unloading switch, the controller is connected with the fan coil through a brake switch, and the controller is connected with a user load through a load switch. The electromagnetic brake device has the advantages that the controller judges the environment wind speed measured by the wind speed instrument, when the wind speed goes beyond a safe value, and the controller switches off the load switch and can simultaneously output a graded gradually increased double-narrow pulse for discontinuously switching off the unloading switch, so the rotating speed of the fan generator is reduced, when the fan rotating speed test instrument detects that the rotating speed of the blades is reduced to the safe value, the controller outputs a graded gradually increased double-narrow pulse for discontinuously switching on the brake switch again, and the rotating speed of the blades of the fan is greatly reduced until the blades completely stop rotating through the switching on the brake switch.
Description
Technical field
The present invention relates to a kind of wind-driven generator, especially relate to a kind of electromagnetic brake device for wind power generator.
Background technique
Along with international and domestic continuous demand for renewable green energy resource, domestic wind-powered electricity generation industry is middle-size and small-size wind-powered electricity generation industry development more and more faster particularly, and people are more and more higher for the hardware controls technical requirements of middle-size and small-size wind power generating set.
Wind-driven generator is when generator operation, if carry out transient service or run into the natural situation of burst such as during too high wind speed, need to brake so that blade of wind-driven generator stops operating wind-driven generator.Existing middle-size and small-size wind-driven generator, when running into unpredictable large strand of high wind, when anemoscope detected wind speed above survival wind speed, the wind-power electricity generation chance started brake immediately.But in this brake process, often because brake speed is too fast, the mechanical part of brake is braked axial fan hub immediately; And fan blade partly tends to because huge inertia is rotated further, and this can cause blade broken.
For this reason, in the urgent need to address excessive because of wind speed, when the blade of wind-driven generator is overrun the process of rotating, brake suddenly and the problem that causes blade of wind-driven generator to fracture.
Summary of the invention
Technical problem to be solved by this invention provides a kind of blade of avoiding because of the excessive electromagnetic brake device for wind power generator that is fractureed of wind speed.
The present invention solves the problems of the technologies described above the technological scheme that adopts: a kind of electromagnetic brake device for wind power generator, it is characterized in that comprising controller, anemoscope, the rotation speed of fan testing instrument, off-load switch and brake switch, anemoscope is monitored ambient wind velocity, described rotation speed of fan testing instrument is monitored the impeller of blower rotating speed, described anemoscope is connected with controller, described rotation speed of fan testing instrument is connected with controller, described controller is connected with fan coil by described off-load switch, described controller is connected with fan coil by described brake switch, and described controller is connected with user load by load switch.
Tele-control system is connected with described controller.
Described controller comprises take ARM chip LPC2132FBD64 as main microprocessor.
Described load switch comprises the first metal-oxide-semiconductor, the off-load switch comprises the second metal-oxide-semiconductor and the first resistance, described brake switch comprises the 3rd metal-oxide-semiconductor, the first control end of arm processor is connected with the grid of the first metal-oxide-semiconductor, the drain electrode of the first metal-oxide-semiconductor is connected with an end of user load, the source electrode of the first metal-oxide-semiconductor is connected with the B of fan coil end, the other end of user load is connected with the A of fan coil end, the second control end of arm processor is connected with the grid of the second metal-oxide-semiconductor, the drain electrode of the second metal-oxide-semiconductor is connected with the first resistance one end, the first resistance the other end is connected with the A end of fan coil, the source electrode of the second metal-oxide-semiconductor is connected with the B of fan coil end, the 3rd control end of arm processor is connected with the grid of the 3rd metal-oxide-semiconductor, and the source electrode of the 3rd metal-oxide-semiconductor is connected with the A of fan coil end, and the drain electrode of the 3rd metal-oxide-semiconductor is connected with the B of fan coil end.
Compared with prior art; the invention has the advantages that controller judges the ambient wind velocity that anemoscope records; when wind speed surpasses safety value; controller can be exported the two burst pulses of an incremental classification, and (the pulse signal dutycycle is according to 1%; 1.5%; 2%......90% increase progressively step by step) the off-load switch is carried out the closure of discontinuity; protected on the one hand the load user; the rotating speed of blower fan generator is descended; when the fan blade rotating speed that detects when the rotation speed of fan testing instrument drops to safety value; controller is exported the two burst pulses of an incremental classification are carried out discontinuity to brake switch closure again; the startup of brake switch reduces the impeller of blower rotating speed gradually until stop operating fully.
Inner at blower fan, axial fan hub links to each other with the rotor of blower fan, and when wind was arranged, the wind blows blade made axial fan hub drive the inner generator amature motion of blower fan, generates electricity.When carrying out pulse when brake, the off-load switch on, the fan coil energising has produced the new magnetic field opposite with the generator unit stator magnetic direction, hinders rotor motion, and wheel hub is produced a braking force, thus the rotation that slows down fan blade reaches the purpose of brake.
The present invention adopts the two burst pulse modes of incremental classification to control brake switch, utilize the mode that increases gradually dutycycle, classification is closed, increase gradually the duration of brake switch closure, blower fan is underspeeded gradually, finally after dutycycle reaches 90%, fan speed is very low, final when dutycycle reaches 100%, blower fan is braking thoroughly, brakes successfully.
In the process of brake, adopt the two burst pulse mode control switchs of incremental classification closed, brake is continued for some time, then decontrol, repeatedly carry out, can give the time of a buffering of blade, be unlikely to owing to the too fast blade broken that makes of brake.
Description of drawings
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is partial circuit diagram of the present invention;
Fig. 3 is wind-driven generator brake working principle schematic diagram of the present invention.
Embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
A kind of electromagnetic brake device for wind power generator, comprise controller 1, anemoscope 2, rotation speed of fan testing instrument 3, off-load switch 4 and brake switch 5,2 pairs of ambient wind velocities of anemoscope are monitored, 3 pairs of impeller of blower rotating speeds of rotation speed of fan testing instrument are monitored, anemoscope 2 is connected with controller 1, rotation speed of fan testing instrument 3 is connected with controller 1, controller 1 is connected with fan coil T1 by off-load switch 4, controller 1 is connected with fan coil T1 by brake switch 5, and controller 1 is connected with user load 7 by load switch 6.
Tele-control system 8 is connected with controller 1.
Controller 1 comprises that model is the arm processor of LPC2132FBD64.
Circuit theory: as shown in Figure 2; at first; controller 1 output PL1 signal; Q1 is turn-offed, and the two burst pulses of PL2 are carried out the closed and disconnected of discontinuity to Q2 simultaneously, start off-load switch 4; carry out the electric charge unloading by increasing progressively step by step two burst pulses; can make the generating of wind-driven generator by off-load switch 4, drag down power supply voltage and protected on the one hand the load user, can make on the other hand gradually reducing wind speed of wind-driven generator.
Secondly, behind the startup off-load switch 4, controller 1 can judge whether rotation speed of fan is reduced in the scope that allows of braking according to the data of rotation speed of fan testing instrument 3 sampling gained.In the time of in rotation speed of fan arrives specified scope, controller can be exported the two burst pulse PL3 in another road, and the PL3 pulse signal carries out the closed and disconnected of discontinuity to brake switch by the 3rd metal-oxide-semiconductor Q3.
At last, when PL3 pulse enable signal field effect transistor is closed, can find out from circuit diagram, formed the loop of a closure after brake switch 5 is closed with blower fan, blower fan generating this moment is only for oneself consumption.Theoretical according to electromagnetic brake, when switch on, fan coil produces magnetic field, and newly produces magnetic direction and blower fan generator field opposite direction by electric current.As shown in Figure 3, under normal circumstances, fan rotor turns clockwise, when carrying out electromagnetic brake, therefore the magnetic field motion that hinder rotor opposite to magnetic field that hot-wire coil produces produced braking force, be that the Lorentz force that is subject to of fan rotor is opposite with sense of rotation, the obstruction blower fan rotates, thereby reduces gradually rotation speed of fan, reaches the purpose of final brake.
Claims (2)
1. electromagnetic brake device for wind power generator, it is characterized in that comprising controller, anemoscope, the rotation speed of fan testing instrument, off-load switch and brake switch, anemoscope is monitored ambient wind velocity, described rotation speed of fan testing instrument is monitored the impeller of blower rotating speed, described anemoscope is connected with controller, described rotation speed of fan testing instrument is connected with controller, described controller is connected with fan coil by described off-load switch, described controller is connected with fan coil by described brake switch, and described controller is connected with user load by load switch; Described controller comprises that model is the arm processor of LPC2132FBD64; Described load switch comprises the first metal-oxide-semiconductor, the off-load switch comprises the second metal-oxide-semiconductor and the first resistance, described brake switch comprises the 3rd metal-oxide-semiconductor, the first control end of arm processor is connected with the grid of the first metal-oxide-semiconductor, the drain electrode of the first metal-oxide-semiconductor is connected with an end of user load, the source electrode of the first metal-oxide-semiconductor is connected with the B of fan coil end, the other end of user load is connected with the A of fan coil end, the second control end of arm processor is connected with the grid of the second metal-oxide-semiconductor, the drain electrode of the second metal-oxide-semiconductor is connected with the first resistance one end, the first resistance the other end is connected with the A end of fan coil, the source electrode of the second metal-oxide-semiconductor is connected with the B of fan coil end, the 3rd control end of arm processor is connected with the grid of the 3rd metal-oxide-semiconductor, and the source electrode of the 3rd metal-oxide-semiconductor is connected with the A of fan coil end, and the drain electrode of the 3rd metal-oxide-semiconductor is connected with the B of fan coil end.
2. electromagnetic brake device for wind power generator according to claim 1 is characterized in that tele-control system is connected with described controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102408187A CN102312776B (en) | 2011-08-22 | 2011-08-22 | Electromagnetic brake device for wind power generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102408187A CN102312776B (en) | 2011-08-22 | 2011-08-22 | Electromagnetic brake device for wind power generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102312776A CN102312776A (en) | 2012-01-11 |
| CN102312776B true CN102312776B (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102408187A Expired - Fee Related CN102312776B (en) | 2011-08-22 | 2011-08-22 | Electromagnetic brake device for wind power generator |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632525A (en) * | 2015-02-05 | 2015-05-20 | 战金玉 | Magnetic powder brake system of wind generator |
| US10167849B2 (en) * | 2015-07-29 | 2019-01-01 | General Electric Company | Wind turbine control using secondary controller to adjust wind speed and/or direction input values |
| CN110794304A (en) * | 2019-11-13 | 2020-02-14 | 西安万翔航空科技有限公司 | Micro-special motor simulation load |
| CN114837978A (en) * | 2022-05-10 | 2022-08-02 | 长虹美菱股份有限公司 | Refrigerator fan fault detection device and detection method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004104975A (en) * | 2002-09-12 | 2004-04-02 | Ishida Seisakusho:Kk | Wind power generating device |
| CN101514687A (en) * | 2009-04-10 | 2009-08-26 | 重庆大学 | Brake system of megawatt wind generating set and control method |
| WO2010093621A1 (en) * | 2009-02-10 | 2010-08-19 | West Virginia University | Method for circulation controlled vertical axis wind turbines |
| CN202203047U (en) * | 2011-08-22 | 2012-04-25 | 徐剑雄 | Electromagnetic brake device of wind power generator |
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2011
- 2011-08-22 CN CN2011102408187A patent/CN102312776B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004104975A (en) * | 2002-09-12 | 2004-04-02 | Ishida Seisakusho:Kk | Wind power generating device |
| WO2010093621A1 (en) * | 2009-02-10 | 2010-08-19 | West Virginia University | Method for circulation controlled vertical axis wind turbines |
| CN101514687A (en) * | 2009-04-10 | 2009-08-26 | 重庆大学 | Brake system of megawatt wind generating set and control method |
| CN202203047U (en) * | 2011-08-22 | 2012-04-25 | 徐剑雄 | Electromagnetic brake device of wind power generator |
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| CN102312776A (en) | 2012-01-11 |
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Application publication date: 20120111 Assignee: NINGBO WINPOWER GROUP CO., LTD. Assignor: Xu Jianxiong Contract record no.: 2014330000059 Denomination of invention: Electromagnetic brake device for wind power generator Granted publication date: 20130327 License type: Exclusive License Record date: 20140331 |
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Effective date of registration: 20150929 Address after: 315040, No. 11, rainbow South Road, Jiangdong District, Zhejiang, Ningbo (5-17) Patentee after: ZHEJIANG FENGSHENG ENERGY SAVING TECHNOLOGY CO., LTD. Address before: 315103, Ningbo, Zhejiang province National hi tech Development Zone Mei Hui Industrial Zone, East Road (Holly Road) Patentee before: Xu Jianxiong |
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Granted publication date: 20130327 Termination date: 20160822 |
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| CF01 | Termination of patent right due to non-payment of annual fee |