Digitally implemented sliding-mode control of a single-phase dual-boost PFC rectifier

The digital implementation of a sliding-mode based control for a dual-boost rectifier with power factor correction (PFC) is presented in this paper. The proposed scheme has a current controller tracking a pure sine-wave reference, whose amplitude is a function of the output voltage error affected by proportional and integral terms. Thus, both power factor correction and output voltage regulation are simultaneously achieved. The performance of the overall converter was verified using MATLAB-based simulations and experimental results in a 120 W prototype, obtaining an unitary power factor and a total harmonic distortion (THD) below 3%.