Steady-State Performance and Analysis of the Series Resistance--Capacitance Circuit with Control by Adjustable Thyristor Triggering

A pair of thyristors connected inverse parallel, with symmetrical triggering, are found to give smooth, stepless control of the current and load voltage in a series resistance-capacitance circuit. Large current pulses of adjustable amplitude are produced that appear to be suitable for electric welding. The application to power factor compensation of inductive loads is limited in usefulness due to poor waveform and high dissipation in the resistance-capacitance branch.