Nonlinear capacitors in snubber circuits for GTO thyristors

Many applications with GTO thyristors require snubber circuits, at least for, turn-off. In achieving high switching frequencies there are conflicting design criteria for the snubber capacitor-losses versus timing conditions. Improvements to this situation are expected by employing nonlinear capacitors. Features of snubber circuits with nonlinear capacitors are described, and experimental results obtained from 50 A and 90 A GTO thyristors are discussed.<
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