High-dynamic-response Adaptive Sliding Mode Control of Totem-pole PFC Converter
A PFC converter is a typical non-linear system whose robustness is quite susceptible to wide-range AC input voltage and large-step load disturbance.Aiming at improving robustness and dynamic response of the system,this work studied the adaptive sliding mode control method for single-phase totem-pole PFC converters.By analyzing the mathemati-cal model of totem-pole PFC converter,multiple sliding control surfaces were designed based on the mathematical model and sliding mode control principle.Meanwile,an observer-based adaptive voltage loop feed-forward control was designed to accelerate the response of the voltage loop,thereby facilitating full potential of sliding control performance of the inner current loop.The performance comparison with the conventional dual-loop-PI-compensator-based control method carried out on the self-constructed test platform verified the effectiveness of the proposed method.
single-phase totem-pole PFC converteradaptive sliding mode controlload steppingdigitalized control