Design and Simulation of a Solar Based DC-DC Converter for Hybrid Electric Vehicles

-This paper presents modeling, design and analysis of a bidirectional half-bridge DC/DC converter suitable for power electronic interface between the main energy system and the electric traction drive in hybrid electric vehicles. A solar based renewable energy system is considered as input. A parallel dc-linked multi input converter with a half-bridge bidirectional DC/DC cell topology is chosen to link the solar energy system with the dc-link. The paper focuses on modeling the proposed converter for steady state analysis. Averaging and linearization techniques are applied to obtain the averaged state space models and small signal models of the converter in both boost and buck operation modes. A criterion for sizing the converter passive components based on the imposed design specifications and constraints is illustrated. Simulation results of the buck-boost converter during normal functioning are presented. The same compared with the performance of DC-DC converter for the input of hybrid energy storage system which consists of battery and ultra-capacitor.