Ferroresonant constant ac voltage regulator

Abstract From the Canadian patent

A constant voltage regulator involving a feedback loop by which frequency dependence may be eliminated and at the same time, hunting phenomenon in case of low load can be suppressed without inserting a dummy resistance or a reactor in its circuit, whereby high reliability may be compatible with low cost. The constant voltage regulator comprises a linear reactor and a resonance capacitor connected in series to an input power source, and a variable reactor connected in parallel with said resonance capacitor and involves a feedback loop a saturable, reactor being used as said variable reactor and current, flowing through said saturable reactor being subjected to feedback control in response to …