Dae Joong Kim, “예측 제어 기법을 이용한 PFC 컨버터의 전류 왜곡 개선,” 아주대학교 공학석사 학위 논문, 2016. > Paper

This paper proposes a predictive control algorithm that includes conduction-mode detection for power factor correction (PFC)

converter. In PFC converters, the line current is usually distorted because of the characteristics of the proportional integral (PI) current

controller. To improve the quality of the current, the PI current controller requires additional circuits or algorithms. However, because

of the optimal duty cycle determined by estimating the next-state current in both the continuous conduction mode (CCM) and the

discontinuous conduction mode (DCM), the proposed predictive control method has a fast dynamic response and accuracy compared

to the PI current control method. Moreover, the proposed algorithm can detect the conduction mode without any additional circuitry

or mode-detection algorithm using the characteristic of the optimal duty cycle calculated by the predictive control. These advantages

of the proposed algorithm improve the quality of the line current for PFC converters. We verify the proposed method by performing

experiment using a 1.5 kW PFC converter.