Single-Phase Hybrid Switched-Capacitor Interleaved AC-DC Boost Converter

In this paper a single-phase boost PFC multilevel interleaved high-voltage gain based on the hybrid switched-capacitor concept is presented. The proposed converter merges interphase transformers and switched-capacitor cells to obtain current sharing and high voltage gain. These features allow for both the reduction of voltage and current stresses on the semiconductors. Furthermore, the interleaving method allows for obtaining multilevel voltages at AC terminals, thereby reducing the weight and bulk of the input inductor. PFC operation is guaranteed through both input current control and output voltage control. Both steady-state and dynamic analyses were conducted. Experimental results for a 1.25 kW, 127 V to 800 V laboratory prototype are presented and discussed.

Automated summary

This paper presents a novel single-phase boost PFC multilevel interleaved high-voltage gain scheme that achieves current sharing and high voltage gain by integrating different technologies, effectively reducing stress on semiconductor devices. By using interleaving method, multilevel voltages at AC terminals are achieved, reducing the weight and size of the input inductor.