PUBLICATIONS

This paper proposes a new design for quick battery charger systems for electric vehicles that consists of a three-phase inverter and

a full-bridge converter which use the phase-shift method. The 3-phase inverter controls the input and DC-link voltage by use of a

current controller and a voltage controller. The full-bridge converter transfers the DC-link voltage to a fixed output voltage. Designs

for the output-side converter and controller for improved performance are proposed in this paper. Design schemes for the filter and

controller of an input-side inverter are also presented. Furthermore, the paper proposes a compensation method for the offset

current that is caused by switch failure and circuit problems. Simulations and experiments have been performed on a 50kW-battery

charger system that is suitable for vehicles. The presented results verify the validity of the proposed method and the superiority of

the system over conventional methods.