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.
关键词
单相PFC变换器/自适应滑模控制/负载阶跃/数字控制
Key words
single-phase totem-pole PFC converter/adaptive sliding mode control/load stepping/digitalized control
维普
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