A Novel Maximum Efficiency Point Tracking Technique for Modular Paralleled Electric Vehicle Charging System

It is well-known that the electric vehicle is the main trend for the future transportation market. Obviously, fast charging for the EV battery is the urgent and critical requirement of customers which makes the high output power chargers to be the mainstream products. Modular paralleled system is a good option to extend the charging system's power and shorten the development cycle at the same time. The traditional current sharing method cannot optimize the system's efficiency. In this paper, a novel maximum efficiency point tracking technique is proposed to improve the efficiency for modular paralleled power system at the light load (20%similar to 50% load) and balance the accumulative operation energy for each module as well. Both the simulation and experiment results are given to show that the average efficiency improvement reaches 1.3%.