A Multiplexing Modulation Strategy Based On Single-Phase Ac/Dc Converter With Optimized E-Capless Function

Active power decoupling (APD) techniques prove to be efficient in cutting passive component size for single-phase AC/DC converter, usually against bulky electrolytic capacitors (E-Cap) on DC side. Generally, no adding extra switches is expected to realize E-Capless function as well as original power factor correction (PFC). This paper proposes a multiplexing modulation strategy with optimized power-decoupling reference algorithm, employing a small LC branch as power decoupling circuit to replace large electrolytic capacitors, which could further reduce dc-link capacitance. Both simulation and experimental results for a 1kW prototype are presented in this paper to validate the performance of proposed method.