Snubber energy recovery circuit for protecting switching devices from voltage and current

摘要

A snubber energy recovery circuit for protecting switching devices (GTO) from current and voltage, which comprises a snubber circuit connected in parallel with a switching device (GTO), a recovery path for recovery the energy stored in the snubber circuit, and a constant-current source (CSUP) for maintaining current flowing in the recovery path at a constant value. The snubber circuit is composed of a snubber diode (Ds) and a snubber capacitor (Cs), with one end of the recovery path being connected to the junction point of the snubber capacitor (Cs) and snubber diode (Ds). IMAGE