BOND GRAPH MODELLING AND DESIGN OF BOOST ZCS QUASI RESONANT DC-DC POWER CONVERTER

Shaik H. Vali, Ganesh Vulasala, and Rachamadugu Kiranmayi

Keywords

Bond graphs, boost converter, modelling, quasiresonant, zerocurrent switching

Abstract

Conventional pulse width modulated (PWM) converters have limited applications at higher frequency values. Switching losses and stresses are high. Quasi-resonant DC–DC converters can solve these problems. The quasi-resonant DC–DC converters work on either zero voltage or zero current switching concepts. They switched their states when either the voltage or the current is zero. Using bond graphs, a boost zero current switching (ZCS) quasi-resonant DC– DC power converter is modelled. The steady-state, large-signal and small-signal AC bond graph models of the converter are developed. The developed model is simulated in MATLAB/SIMULINK. The simulated results of the developed bond graph model are compared with the PSIM simulated results of the circuit model and experimental results. The efficiency and other performance parameters of the boost zero current switching (ZCS) quasi-resonant DC–DC power converter are compared experimentally with those of the PWM boost converter.

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