Steady-State Analysis of Single-Phase, Parallel, Resistance-Inductance Circuits Controlled by SCR Pairs

The currents and load voltage of a 2-branch resistance-inductance parallel circuit controlled by an SCR pair in the supply line are deduced. While the SCRs are nonconducting, current decays exponentially around the load loop. The extinction angle is a transcendental function of the load impedances and (implicitly) the supply voltage. There is close agreement between measured and calculated results. The system cannot be analyzed in terms of a single-impedance equivalent load.