Electromagnetic braking and controlling system of wind power generator

Abstract

The invention relates to an electromagnetic braking and controlling system of a wind power generator, wherein the stator groove of the wind power generator is internally equipped with a power generating winding and a braking winding by winding, the power generating winding and the braking winding are separated by using an insulator; the output of the power generating winding is passed through a relay and a rectifier bridge and is output by a direct current output end in the form of direct current, the output of the power generating winding is connected to the braking winding after passing through a brake resistor, the rectifier bridge and the relay, the two ends of the brake resistor are serially connected to relays and the relays are respectively connected to a control system and are controlled by the same. The electromagnetic braking and controlling system of the wind power generator provided by the invention has the advantages that the structure is simple, the system is easy to be carried out, the braking winding and the power generating winding are non-interfering when the generator is operated normally, the power generating winding is used for generating power normally, the braking winding further can be used for generating power or supplying power to the control system and the braking winding is used for realizing the purpose of braking while stopping; the mechanical structure of wind power generator is simplified, the failure rate is reduced, the service life of wind power generator is greatly prolonged, the control is convenient and the purpose of voltage stabilization can be realized by reducing the speed by means of electromagnetic braking when the wind power generator is overspeeded.

Description

technical field [0001] The invention relates to a braking system of a wind power generator, in particular to a braking and braking control system using electromagnetic braking. Background technique [0002] With the continuous development of the economy, people's demand for energy is increasing, and the reserves of non-renewable resources are seriously threatened. Therefore, people gradually turn their attention to renewable resources. As a clean and renewable energy, wind energy is becoming more and more important. It has been paid more and more attention by countries all over the world, thus prompting continuous innovation of wind turbines. During the use of wind turbines, sometimes it is necessary to brake the running wind turbines to stop work or perform maintenance or to deal with other special situations. Most of the existing wind turbines are controlled by mechanical systems or hydraulic systems. It performs braking control, and the hydraulic control system is easily...

AI Technical Summary

Problems solved by technology

During the use of wind turbines, it is sometimes necessary to brake the running wind turbines to stop them from working or perform maintenance or to deal with other special situations. Most of the existing wind turbines are controlled by mechanical systems or hydraulic systems It performs braking control, and the hydraulic control system is easily affected by temperature. It is not suitable for overcooling or overheating environments, and its service life is low, and failures such as oil leakage often occur, which cannot guarantee the braking safety of wind turbines; mechanical The structure of the brake is often complex, mainly relying on the friction between the friction brake and the generator rotor to stop it, not only the cost is high, but also the failure rate is high, the friction brake needs to be replaced after wear and tear, most importantly, when the wind turbine is running at high speed When emergency braking is required, a large amount of heat will be generated during the friction process, and even damage the wind turbine

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