Pitch regulating device and wind driven generator

Abstract

The invention provides a pitch regulating device and a wind driven generator. The pitch regulating device comprises a servo motor driver, a pitch regulating motor and a super capacitor, wherein the servo motor driver comprises a main electric loop, a controller and a charging and discharging circuit; the main electric loop is connected with the pitch regulating motor for providing electric energy for the pitch regulating motor; the charging and discharging circuit is connected with the super capacitor and is a pulse width modulation (PWM) circuit; and the controller is used for controlling the pitch regulating motor to carry out pitch regulating operation according to the pitch regulating parameter. In the embodiment of the invention, the servo motor driver and the super capacitor are charged and discharged by the charging and discharging circuit of the PWM circuit, thereby lowering the influence on the super capacitor from the voltage fluctuation of the main electric loop, reducing the charging and discharging times of the super capacitor, prolonging the service life of the super capacitor, effectively avoiding the situation that the super capacitor frequently generates overvoltage and improving the working environment of the super capacitor.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, in particular to a pitch control device and a wind power generator. Background technique [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. Our country is rich in wind energy resources, and the potential of using wind turbines to generate electricity is huge. [0003] During the power generation process of the wind turbine, due to the unstable and uncontrollable wind speed, when the wind is too strong, the pitch motor in the pitch device needs to be used to change the pitch of the blades to protect the safety of the wind turbine. However, when the wind power generator fails, the pitch motor can be discharged through the supercapacitor installed on the wind generator, so that the pitch motor can successfully complete the pitch change. [0004] Because supercapacitors can provide a large instantaneous ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention provides a pitch control device and a wind generator, which are used to solve the problems of frequent charging and discharging of supercapacitors and short service life in the prior art

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