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CRA Based Robust Controller Design for PWM Converter  

Kim, Soo-Cheol (충북대 전기공학과)
Kim, Hyung-Chul (우진산전)
Chung, Gyo-Bum (홍익대 전자전기공학부)
Choi, Jae-Ho (충북대 전기전자컴퓨터공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.12, no.2, 2007 , pp. 183-190 More about this Journal
Abstract
In this paper, a robust controller for PWM converter is proposed. The proposde converter controller consists of a PI controller for DC output voltage and a current controller using error-space approach for maintaining the sinusoidal current waveform and unity power factor. Conventionally, the try and error method has been used to design the current controller considering the switching frequency of the devices and sampling frequency of the digital controller. But this proposed method is based on characteristic ratio assignment(CRA) method which has the advantage to design the optimal gain to meet the referenced response and overshoot within the limit range. First, the CRA based current controller algorithm is explained. Then the validity of proposed controller is verified through the PSiM simulation and experience results.
Keywords
PWM converter; CRA; error-space approach; robust control;
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