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In this paper, equivalent electric circuit models of a commercial 1.2-kW proton exchange membrane (PEM) fuel cell stack are proposed based on AC impedance studies. The PEM fuel cell stack was operated using room air and pure hydrogen (99.995%). Using electrochemical impedance spectroscopy (EIS) technique, impedance data were collected in the laboratory under various loading conditions. Impedance data...
A new IGBT (insulated gate bipolar transistor) model for simulation of complicated multi-IGBT circuits is presented. Based on the gate charge and discharge behaviors of IGBT, it piecewise models the turn-on and -off transient of IGBT, and simulates the static characteristics with curve fitting method. With the key features of high simulation speed, easy parameters extraction and clear physical meaning,...
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