Novel PFC ac-dc converter of high efficiency used in 2kW fire electric installation

Abstract

This paper proposes a novel power factor correction (PFC) ac -dc converter of high efficiency used in fire electric installation operated with generally rated power 2kW. The input current waveform in proposed converter is got to be sinusoidal waveform in proportion to magnitude of ac input voltage under constant duty cycle switching. The proposed converter is driven with discontinuous conduction mode (DCM), and then the control circuit requirement is simple. As results of these, the input power factor is nearly unity and the control method is simple. Also the switching devices in converter are operated with soft switching by partial resonant method. The results are that the switching power loss is very low and the efficiency of converter is high. The validity of analytical results is confirmed from some simulative results on computer and experimental results.