Drive device of series DC machine for pitch control system

Abstract

The invention provides a drive device of a series DC machine for a pitch control system, which comprises a power loop part and a control loop part, wherein the power loop part comprises a rectifying unit, an energy consuming unit, a power switching circuit, an excitation reversing device, an alternating current input phase sequence detection unit, a busbar voltage and output current detection unit and the like, wherein the control loop part comprises an analogue signal sampling unit, a digital signal input acquiring unit, a speed signal acquiring unit, a digital signal outputting unit, an upper computer information interacting unit and the like. The circuit design is suitable for low-speed torque frequent starting of the series DC machine for the pitch control system and has characteristics of rapid response, current-limiting protection and flexible reversion. The drive device has perfect function and high reliability.

Description

technical field [0001] The invention belongs to the field of direct current motor control, in particular to a series excitation direct current motor driving device for a pitch control system. Background technique [0002] As a renewable and clean energy with mature technology, wind power has been widely valued by various countries. The pitch control system is an important component of the wind power generation system. Its main function is to control the automatic adjustment of the blade pitch angle with the wind speed: when the wind speed is low, the wind turbine has the maximum starting torque; When it is high, the angle of attack of the airflow on the blades is changed, and then the aerodynamic torque obtained by the wind turbine is changed, so that the output power of the generator remains stable. [0003] The motor drive device is one of the key components of the pitch control system. The main functions of the motor drive device of the pitch control system include the ...

AI Technical Summary

Problems solved by technology

Judging from the current published literature, the patents and materials related to the motor drive device for the pitch control system are very limited, and currently the series excited DC motor is most commonly used in the pitch control system in the wind power field, so it is necessary to design a good performance Drive device for series excited DC motor for pitch control

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