LAUSR

Double switching frequency components of the input current in the isolated three-port converter (TPC) can be effectively mitigated using an LC circuit at the input side of the converter. Although the LC circuit prevents the high-frequency current flow into the system, there is a resonant peak in the port current control model that can degrade the control performance and even give rise to instability issues. In this article, an active damping method (ADM) is proposed to enhance the damping ratio of the current control system and decrease the resonance amplitude of the LC circuit. The proposed ADM is fully implemented within the converter control system without any additional circuits or components and as such is seen as a cost-effective and efficient method. Simulation and experiment results show the effectiveness of the proposed method on the input current oscillation elimination in an isolated TPC.