Improvements for the pulse charger with zero current switching and isolation for electric vehicles

With the growing interest in electric vehicles, battery chargers have taken the interest of researchers. Charging power levels, Efficiency, reliability, low cost, low weight and low distortion to the utility current at a higher power factor are the main focus of such studies. Various types of battery chargers have been introduced to this effect. A charger which generates current pulses for charging a battery much faster, using zero-current-switching., is introduced in this paper. Improvements are in place to draw unity power factor line currents with lower switching losses, making it suitable for up to Level 3 charging. Safety has been achieved by isolating the battery and the charger through an output transformer based on the fly-back concept. The topology has been studied using PSIM 9.0.3 Software. The principle of operation, current control methodology, and the simulation results are presented.