Abstract
A closed loop system consisting of a thyristor amplifier frequently generates subharmonic self-oscillations, which cause deterioration of the accuracy of the system.
In this paper, the relations between the magnitude of 1/2-harmonic self-oscillation and the open loop gain of the control system are presented. From experimental results, it is shown that unbalance of elements and disturbance, such as fluctuation of the power source, promote the generation of the oscillation.
