A novel active discontinuous PWM control strategy for high efficiency partial switching predictive current-mode control PFC converter

Abstract

This paper proposes a predictive current mode control boost PFC converter adopting a novel active part switching technique to achieve both robust current shaping control to disturbances and high power conversion efficiency. This strategy consists of controlling the switching stop angle near the peak of the input voltage through the output voltage control and controlling the switching stop period near the zero voltage of the input voltage according to the load variation. The proposed method shows outstanding PFC performance and high efficiency even under various input disturbances such as input voltage and load fluctuation, and has an advantage of high efficiency even at an output voltage higher than the input voltage peak value. For sequential description, in this study, the design of the controller using the frequency domain is presented along with the theoretical analysis of the proposed method. Experimental results using a 2.4 kW boost PFC converter prototype are also presented to verify the effectiveness of the proposed method.