A novel quadratic Boost converter with low current and voltage stress on power switch for fuel-cell system applications

摘要

AbstractThis paper presents a novel quadratic Boost converter with good features: no abruptly changing on capacitors' voltage and inductors' current in the whole switching cycle which can assure no instantaneous overcurrent or overvoltage on storage elements, non-pulsating input current that can make the input filter design easier, low current and voltage stress on power switch. The basic operating principles and the mathematical model of this novel quadratic Boost converter are presented. The steady state and the small signal dynamical behaviors are analyzed and the comparisons among other quadratic Boost converters are described and concluded. Finally, the Pspice simulations and the corresponding circuit experiments are presented for confirmation.•PQBC’s good features: no abruptly changing on capacitors’ voltage and inductors’ current, non-pulsating input current.•Result from comparison show PQBC has lowest voltage and current stress on MOSFET Q2and possesses the highest efficiency.•Theoretical analysis, simulations and experiments show that PQBC is a good candidate for fuel-cell system applications.