Steady-State Analysis of a Two-Branch Resistance--Inductance Parallel Circuit Controlled by a Bidirectional ac Switch

The currents and load voltage of a two-branch resistance-inductance parallel circuit controlled by an ac switch in series with the supply are derived. It is shown that the extinction angle is a transcendental function of the ratio of the absolute values of the load impedances, the load phase angles, and the triggering angle, but not (as claimed by another author) of the supply voltage.