Design and Simulation of 1kW Active Rectifier

Abstract

The AC-DC conversion is used increasingly in a wide diversity of applications. Conventionally, ac-dc converters, which are also called rectifiers, are developed using diodes and thyristors to provide uncontrolled and controlled dc power with unidirectional and bidirectional power flow. They have the demerits of poor power quality in terms of injected current harmonics, caused voltage distortion and poor power factor at input ac mains and slow varying rippled dc output at load end, low efficiency and large size of ac and dc filters. In light of their increased applications, a new breed of rectifiers has been developed using controlled power switches like insulated gate bipolar transistors (IGBTs), gate-turn-off thyristors (GTOs), or integrated gate controlled thyristors (IGCTs) to change actively the waveform of the input current, reducing the distortion and gives High power factor. They are called Active Rectifier or PWM Rectifier. This rectifier is controlled by pulse width modulation. This paper presents simulation and design of 1kW Active Rectifier.