THYRISTOR CHOPPER CONTROLLING CIRCUIT

摘要

A circuit arrangement for controlling a thyristor chopper which extinguishes a main thyristor by discharging the charge stored in a capacitor to the main thyristor at a predetermined instance in the opposite polarity, comprising means for detecting the terminal voltage of said capacitor and calculating the maximum ability for extinguishing the main thyristor and means for detecting the load current of the chopper, thereby enabling the extinction of the thyristor in the extinguishing ability of the capacitor.