Switching Characteristics of a 1.2 kV SiC MOSFET Module using a Controllable Current-Sourced Gate Driver

Inhalt:
This paper presents the characterization of a 1.2 kV SiC MOSFET half-bridge module in conjunction with a novel gate driver that allows to change the turn-on speed while in operation. First, the design of a test set-up composed of a SiC MOSFET half-bridge module, a DC-link board and a gate driver board is described. Switching waveforms and switching energies at different currents, voltages and switching speeds are presented. The results show advantages over the classical approach where the turn-on speed is fixed by a gate resistor. Finally, possible applications of the novel gate driver are discussed.