Analysis, design, and implementation of a single-phase power-factor corrected AC-DC zeta converter with high frequency isolation

Abstract

This paper deals with the analysis, design, and implementation of a single phase AC-DC Zeta converter with high frequency transformer isolation and power factor correction (PFC) in two modes of operation, discontinuous current mode of operation (DCM), and continuous current mode of operation (CCM). A Digital Signal Processor (DSP) based implementation is carried out for validation of the Zeta converter developed design in discontinuous mode of operation. A comparison of both modes of operation is presented for a 1kW power rating from the point of view of steady state and dynamic behavior, power quality, simplicity, control technique, device rating, and converter size. The experimental results of a developed prototype of Zeta converter are presented for validation of the developed design. It is observed that CCM is most suitable for higher power applications where it requires some complex control and sensing of the additional variables.