Single phase parallel power processing scheme with power factor control

Abstract

A parallel power processing scheme is proposed. A conventional off-line converter is paralleled with a PFC converter resulting in less overall power handled and thus in improved efficiency. Excellent output dynamics is achieved by two control methods (method-1 and method-2). Method-1 proposes to cancel the second harmonic current component injected into the output capacitor by the FPC converter. The input dynamic performance was improved further in Method-2 which may be viewed as a modification of method-1. SABER simulation using both switched model and averaged model are utilized to confirmed the anticipated good performance of the proposed scheme.