Photovoltaic Based Zero Voltage Transition DC-DC Buck Converter

A soft switched low stress zero-voltage transistor (ZVT) pulse width modulated (PWM) buck converter has been suggested in this paper. The proposed converter eliminates large current and voltage stresses which are generally exhibited by the capacitor of resonant converters. The proposed converter is simulated in PSIM software. The results of the simulation and the waveform outputs have been presented in the paper. The Zero Voltage Switching (ZVS) resonant buck-converter's switching losses have been compared with that of ZVT buck converter with software results. The auxiliary switch forms a resonant loop, decreasing the voltage or current on the power switch to zero, which switches before the main power switch is switched to the conducting state. The ZVT/soft-switching power converter decreases component stress and conduction losses by reducing the voltage/current and minimizes switching losses. The overall efficiency of the converter improved to 97% which is higher than the conventional converter.