Snubber Capacitor. This charge focuses on giving the reader a brief overview on the igbt snubber capacitor. Snubbers are any of several simple energy absorbing circuits used to eliminate voltage spikes caused by circuit inductance when a switch either mechanical or semi conductor opens.
The simplest snubber network is a series rc circuit at the switch node fig. A simple rc snubber uses a small resistor r in series with a small capacitor c. A snubber capacitor is a capacitor that is connected to a large current switching node for the purpose of reducing the parasitic inductance of electric wiring.
When the transistor switches the capacitor then tends to look like a short circuit and the resistor can shunt current out of the switch node.
The capacitor prevents dc currents from flowing. It does this by limiting the rate of rise in voltage dv dt across the thyristor to a value which will not trigger it an appropriately designed rc snubber can be used with. Snubber capacitors have also undergone changes in construction enabling increased power handling capability. The simplest snubber network is a series rc circuit at the switch node fig.
