THYRISTOR FIRING SYSTEM

摘要

THYRISTOR FIRING SYSTEM A firing system for simultaneously firing or gating on several thyristors arranged in a series configuration across a high voltage, requires no isolation pulse transformers to provide pulses to fire the thyristors. A transformer having a primary winding connected to an external AC source and a secondary connected to a rectifier which provides power to the firing system, provides isolation. A power semiconductor switching device is connected between the rectifier and the gate electrode of the respective thyristor. The power semiconductor switching device also has a gate electrode. A fibre optic receiver for each thyristor receives a light pulse which represents the firing signal and provides a signal to circuitry connecting with the gate electrode of the power semiconductor to cause it to conduct and provide a firing pulse to the gate electrode of the respective thyristor.