New Boost-Type PFC MF-Vienna PWM Rectifiers with Multiplied Switching Frequency

Abstract

In this paper new three-level boost-type PFC PWM rectifiers with Multiplied-switching-Frequency (MF) are presented. They can work both at high and low switching frequency for single- and for three-phase unity-power-factor applications. The proposed solutions are named MF-Vienna PWM rectifiers (M=2 or 3) and are based on classical 1F-Vienna topology (M=1), the most popular PWM boost-type PFC concept with three voltage levels. By adding auxiliary active power device(s) to 1F-Vienna circuit and through proper modulation strategies, the ripple frequency present in the input and output passive components can be doubled (M=2) or tripled (M=3). This advantage leads to the reduction of boost inductor and line filter requirements. The operation principle of the 2F-Vienna cell is validated for three-phase PWM rectifier using Voltage Oriented Control (VOC) method.

Keywords

• AC-DC power converters
• energy conversion
• power quality
• rectifiers
• voltage control