DC Film (Dry Construction) Technical Papers

Design of Snubbers for Power Circuits

Snubbers are suppression circuits which are placed across IGBTs and switching transistors in power conversion circuits to suppress voltage transients and protect semiconductor devices from overvoltage. This paper shows how to design resistor-capacitor (RC) damping snubbers and the resistor-capacitor-diode (RCD) turn-off snubbers.

Expanding the Safe Operating Area of Polypropylene Dielectric IGBT Snubber Capacitors

Important developments of IGBT's (Insulated Gate Bipolar Transistors) in recent years have been focused on increasing power handling capability and increasing reliability including short circuit tolerance. Snubber capacitors have also under-gone changes in construction enabling increased power handling and short circuit tolerance. This paper describes the maximum envelope for operation of the new generation polypropylene snubber capacitors in IGBT inverter applications