CN201280999Y

CN201280999Y - Speed changing frequency-constant permanent magnet speed governing wind power generator

Info

Publication number: CN201280999Y
Application number: CNU2008201396152U
Authority: CN
Inventors: 马杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-28
Filing date: 2008-10-28
Publication date: 2009-07-29
Anticipated expiration: 2018-10-28

Abstract

The utility model relates to a variable speed constant frequency permanent magnetism speed-regulating wind-force generator, comprising a wind wheel, a transmission shaft, a speed-raising gear box, a generator and a frequency changer; the generator further comprises a permanent magnetism speed regulator which is arranged on the transmission shaft between the speed-raising gear box and the generator; the generator has the advantages that: 1) air gap is regulated by the permanent magnetism speed regulator for leading the rotating speed output by the wind wheel or the gear box to be stepless speed regulating, thus leading the rotating speed of the generator to be relatively constant; 2) soft starting is realized for leading the generator to be cut-in and cut-out at any time under any rotating speed of the blower, thus increasing the electricity-generating time of the wind-force generator; 3) the system vibration is eliminated, the equipment service life of the system is prolonged, and the reliability is improved; 4) the generator is suitable for various serious working environments; 5) the whole parts of the generator are reduced, construction cost, and using and maintaining cost in later period is lowered; 6) rotation clogging and impulse can not effect the generator; 7) centering error can appear in the generator; 8) the equipment life is prolonged and fault period is increased; 9) interference from electromagnetic wave is avoided; 10) the total cost is reduced.

Description

Variable speed constant frequency permanent magnetic speed-adjusting wind power generator

Technical field

The utility model relates to a kind of wind-driven generator, especially relates to a kind of variable speed constant frequency permanent magnetic speed-adjusting wind power generator.

Background technique

Now, big-and-middle-sized in the world wind power generating set mainly contains two kinds of patterns.One class is a fixed pitch stall-adjusted type, belong to the constant speed type, general synchronous machine or the squirrel cage asynchronous motor of using is as generator, wind turbine by fixed pitch stall control makes the rotating speed of generator remain on constant numerical value, then the stator field speed equals mains frequency after making the wind-powered electricity generation set grid-connection, the excursion of rotor, impeller is little, and the efficient of capturing wind energy is low.Another kind of is speed change displacement type, general double feedback electric engine or the permagnetic synchronous motor of adopting, the change that the method that combines by speed regulator and feather control makes wheel speed can follow wind speed changes in very wide scope, keep best tip speed ratio operation, thereby make power coefficient in very big wind speed excursion, all can keep maximum value, energy capture efficient maximum.The electric energy that generator sends is regulated by current transformer, become with electrical network with frequency, homophase, arrive electrical network with the power delivery of the width of cloth.By contrast, the variable speed model wind-driven generator has incomparable advantage.

The main two kinds of schemes of power-driven system of at present popular speed-changing oar-changing wind power generating set: a kind of is raising speed gear-box+wire wound asynchronous motor+double-fed frequency variator; Another kind is the direct driving low-speed permanent-magnet generator+full power frequency variator of non-gear box.Two kinds of schemes respectively have pluses and minuses: the former adopts high-speed electric expreess locomotive, and volume is little in light weight, and the capacity of the double-fed frequency variator only slip capacity with motor is relevant, efficient height, cheap, and shortcoming is that raising speed gear-box price is expensive, noise is big, fatiguability damages; Latter's non-gear box, the reliability height, but adopt the low-speed permanent-magnet motor, and volume is big, the cost height, and frequency variator needs full power, and cost improves.

In sum, the combination property of present speed-changing oar-changing wind-driven generator also is not very perfect.

The model utility content

The technical problems to be solved in the utility model provides a kind of variable speed constant frequency permanent magnetic speed-adjusting wind power generator.This wind-power electricity generation function greatly reduces the complete machine cost, can reduce the used parts of blower fan, and volume is little, and is in light weight, the efficient height, and the reliability height is maintainable good simultaneously.

For solving the problems of the technologies described above, the utility model adopts following technological scheme: it comprises wind wheel, transmission shaft, generator and frequency variator; It also comprises permanent-magnet speed governor, and this permanent-magnet speed governor is arranged on the transmission shaft between wind wheel and the generator.

Further improved technological scheme is provided with the raising speed gear-box between described permanent-magnet speed governor and the wind wheel.

Further improved technological scheme, described permanent-magnet speed governor comprise the copper disc rotor and with the disk rotor of copper disc rotor matched size; Described copper disc rotor is faced on concentric, axial mutually with the disk rotor, and air gap clearance therebetween is adjustable.

The utlity model has following advantage:

1) by permanent-magnet speed governor adjust air gap clearance make wind wheel (gear-box) but output to generator speed stepless speed regulation, can make generator speed constant relatively, realize the generating of wind-driven generator high-efficiency high-quality.

2) realize soft start, generator can be cut at any time and cut out under any rotating speed of blower fan, can increase the generating dutation of wind-driven generator.

3) elimination system vibrations prolong the system equipment life-span, improve reliability.

4) be adapted to various harsh working environments.

5) reduce the complete machine parts, reduce cost and later stage operation and maintenance expense.

6) be not afraid of stall, be not afraid of pulse.(the protection motor, mechanical seal is good .)

7) tolerance error of centering.

8) prolong life of equipment, increase inaction interval.

9) no Electromagnetic Interference.

10) reduce overall cost.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a permanent-magnet speed governor structural representation of the present utility model;

Fig. 3 is a permanent-magnet speed governor fundamental diagram of the present utility model.

Embodiment

Referring to Fig. 1, shown in Figure 2, it comprises wind wheel 1, transmission shaft 2, raising speed gear-box 3, permanent-magnet speed governor 4, generator 5 and frequency variator 6 the utility model; Described permanent-magnet speed governor 4 is arranged on 5 the transmission shaft 2 of speed-change gear box 3 and generator; Described permanent-magnet speed governor 4 comprise copper disc rotor 41 and with the disk rotor 42 of copper disc rotor 41 matched size, described copper disc rotor 41 is faced on concentric, axial mutually with disk rotor 42, and the air gap clearance between copper disc rotor 41 and the disk rotor 42 is adjustable, and prior art uses the electric actuator (not shown) to carry out adjustment work.Wind-driven generator of the present utility model is arranged on the pylon 7.

Working principle of the present utility model is as follows:

Shown in accompanying drawing 3, when magnetic force Line NS Copper Guide Body rotates owing to wind wheel 1, drive copper disc rotor 41 cutting magnetic line in the high magnetic fields that disk rotor 42 is produced, thereby in copper disc rotor 41, produce eddy current, this eddy current produces dislike magnetic field conversely around copper disc rotor 41, stop the relative movement of copper disc rotor 41 and disk rotor 42, thereby realized the torque transfer between wind wheel 1 and the generator 5.Torque transfer between wind wheel 1 and the generator 5, be different from conventional mechanical connection manner, connect by air gap, just realize the rotating speed adjustment by the air-gap separation of adjusting between copper disc rotor 41 and the disk rotor 42, other mode of speed regulation does not possess these characteristics.

When the magnetic line of force passes through copper conductor, do not have effect when static; When both have relative movement, the magnetic line of force moves in conductor and produces inducing eddy-current, and then produces induction field on copper conductor, and produces torque; The closer to the time density of line of magnetic force intensive more, it is strong more to produce effect, torque is big more; Relative movement is fast more, and effect is strong more, produces torque big more (slip is big more, and torque is big more); Relative movement is big more, and it is strong more that both respond to homopolar field, thereby produces the purpose that mutually exclusive strength reaches speed governing.

Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to mode of execution of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here can't give exhaustive to all mode of executions.Everyly belong to the row that conspicuous variation that the technical solution of the utility model extends out or change still are in protection domain of the present utility model.

Claims

1, variable speed constant frequency permanent magnetic speed-adjusting wind power generator, it comprises wind wheel, transmission shaft, generator and frequency variator; It is characterized in that it also comprises permanent-magnet speed governor, this permanent-magnet speed governor is arranged on the transmission shaft between wind wheel and the generator.

2, variable speed constant frequency permanent magnetic speed-adjusting wind power generator according to claim 1 is characterized in that: be provided with the raising speed gear-box between described permanent-magnet speed governor and the wind wheel.

3, variable speed constant frequency permanent magnetic speed-adjusting wind power generator according to claim 1 and 2, it is characterized in that: described permanent-magnet speed governor comprise the copper disc rotor and with the disk rotor of copper disc rotor matched size, described copper disc rotor is faced on concentric, axial mutually with the disk rotor, and the air gap clearance between copper disc rotor and the disk rotor is adjustable.