Development and Analysis of Switched Capacitor Four Quadrant DC-DC Converter for Hybrid Electric Vehicle

Abstract

Background/Objectives: The main objective of this research is to develop a bi-directional four quadrant DC-DC converter for an energy efficient electric vehicle. Methods/Analysis: The model of electric vehicle is designed using MATLAB software. The results confirm that the proposed DC-DC converter structure is highly reliable, lighter in weight, smaller in volume, with good efficiency, less electromagnetic interference and lower current or voltage ripple. Findings: The issues on global warming and fossil fuels depletion have created opportunities to Electric Vehicle (EV). The main characteristics of Energy storage system in vehicles include energy density, power density, lifetime, cost and maintenance. Most of the electric and hybrid electric configurations use two energy storage devices, one with high energy storage capacity, called the Main Energy System (MES) and the other with high power capacity called the Auxiliary Energy Storage System (AESS). Other challenge in electric vehicle is to maintain the state of charge within the allowable limits and sharing of energy between the storage devices. For proper sharing of energy between the storage devices, DC-DC converter plays a crucial role. Novelty/Improvement: A novel Switched Capacitor DC-DC power converter and their controllers are investigated.