Hybrid Modulation Interleaving Scheme for CRM Totem-Pole Bridgeless PFC Rectifier

This paper introduces the control method of the totem-pole bridgeless PFC rectifier working in the critical conduction mode (CRM), and analyzes the interleaving scheme based on this. Through analysis, we can get the scheme of interleaving with current-mode control and voltage-mode control. Under the waveform analysis, a hybrid modulation strategy with time periods is obtained, which is simple and reliable. It only needs to sample the input voltage and output voltage in real time to calculate the selection signal and the real-time switching cycle. The parameters of the main power circuit and the control module are designed by formula derivation. Finally, the feasibility of the scheme is verified by simulation. The ripple of the input current can be reduced, and the control scheme is simpler and more reliable.