APPARATUS FOR GENERATING THYRISTOR CONTROL SIGNAL OF EXCITING SYSTEM

摘要

PURPOSE: An apparatus for generating a control signal of a thyristor of exciting system is provided to generate stably a control signal by detecting a phase of supply voltage and generating the firing signal of thyristor. CONSTITUTION: An amplification portion(1) is used for amplifying three phase supply voltage. An A/D conversion portion(2) is used for converting the three phase supply voltage received through the amplification portion(1) to digital values. A CPU(3) detects phases of the three phase supply voltage by processing three phase supply voltage values of the A/D conversion portion(2) and generates a firing signal of a thyristor according to the detected value. A D/A conversion portion(4) converts the firing signal of the A/D conversion portion(2) to an analog signal and outputs a cosine signal. An analog output circuit(5) provides an analog firing signal of the D/A conversion portion(4) to the thyristor.