Modified one cycle control scheme on bridgeless Cuk rectifier

摘要

This paper presents one cycle control of bridgeless single-phase ac-dc power factor correction (PFC) rectifier based on Cuk topology. The topology does not possess input diode bridge and have only two semiconductor switches in the current flowing path during each interval of switching cycle, which results in less conduction losses and better thermal management. This topology is designed to work in discontinuous conduction mode (DCM). The advantages of Cuk converter is also available when bridgeless circuit topology is introduced. One-cycle control takes advantage of the pulsed and nonlinear nature of switching converters and achieves instantaneous dynamic control of the average value of a switched variable. This technique can provide power factor correction, fast dynamic response, good power source disturbance rejection, and corrects switching error automatically.