Voltage Balancing of Series IGBTs in Short-Circuit Conditions

This article proposes a scheme for balancing the voltage of series-connected insulated gate bipolar transistors (IGBTs), which is also very effective under short-circuit conditions. An optimized clamp-mode snubber proposed, including an active-driver to balance currents IGBTs during short-circuit, in turn allows considerable reduction capacitance. The approach proven be conditions by maximum 55 V increment and negligible difference current values. effectiveness proposed demonstrated through simulations PSPICE software experimental tests performed at 2 kV.