A Three Port Bi-Directional DC-DC Converter for PSM Drives Applications

Abstract

This paper proposes a new isolated three-port bidirectional dc–dc converter, which uses the minimum number of switches. It contains an inductor–capacitor–inductor (LCL)-resonant circuit to achieve zero-current switching (ZCS) for the main switch.The converter is capable of interfacing sources of different voltage–current characteristics with PMSM drive. The proposed converter is applied for simultaneous power management of a photovoltaic (PV) system with a battery. The PV system and the battery are connected to the unidirectional port and the bidirectional port of the converter, respectively. A maximum power point tracking (MPPT) algorithm is designed for the PV panel to generate the maximum power when solar radiation is available. A charge and discharge controller is designed to control the battery to either absorb the surplus power generated by the PV panel or supply the deficient power to the PMSM drive and study the characteristics of drive. The simulation results are presented by using Mat lab/Simulink software.