| 摘要 |
FIELD: automatic control systems for protecting high voltage adjustable rectifiers for powering gas cleaning filters in various industrial branches and in agriculture. ^ SUBSTANCE: on disruption of thyristors in ac to method, phase of load current impulse front &phis; is measured as well as thyristor key impulse front phase alpha, their difference is calculated and, when &phis;-alpha is greater than zero, signal is dispatched for disabling automatic switch in powering circuit of rectifier or value of duration of load current impulse T and duration of impulse of phase-shifting device generating impulses for controlling thyristor key t, are measured, value of their difference is computed and, if T-t is greater than zero, signal is formed for disabling automatic switch in power circuit of rectifier. ^ EFFECT: increased efficiency. ^ 2 cl, 1 dwg |
