Abstract
This paper presents home charging system for e-rickshaw with two stage power conversion. The charging system has AC-DC and DC-DC power conversion stage with an isolation transformer. The AC-DC power conversion is made by modified Cuk converter based on Vienna rectification, which is used to maintain power quality according to IEC 61000-3-2 international standard and to maintain constant DC-link with the variation in AC power supply. The output of primary stage is fed to split DC-link. The second stage has half bridge isolated converter with passive rectification on secondary side. This DC-DC power stage is used to control the charging of battery of EV, the charging control is made through frequency modulation. The change in switching frequency changes the power transfer with the variation in effective value in transfer inductance. In order to determine performance of front end converter, the state space model is developed and its frequency response Bode plot is determined with designed parameters under both open and closed loop conditions. For this, a 1.5 kW EV charging system is designed and simulated on MATLAB/Simulink and simulation results at different input and output conditions show the effectiveness of charging system.
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