Single-phase high-power-factor rectifier with capacitor-clamped topology

A single-phase high power factor rectifier based on capacitor-clamped scheme is proposed to achieve high power factor, low current distortion and low voltage stress of power semiconductors. The carrier-based current controller is used in the inner control loop to track the line current command. A voltage compensator is used to balance capacitor voltages to obtain high quality PWM voltage waveform. A PI-based voltage controller is used in the outer control loop to keep DC-link voltage constant. The proposed control scheme illustrates its validity and effectiveness through the respective simulation and experimental results.