Abstract: Disclosed is a three phase AC power regulator using a single power modulating element. The element may be operated class A or in switching mode. A transformer primary is connected in Y configuration with the common junction being made through a 6 diode bridge and the single control element. The single control element thereby controls the common current in all three sections of the transformer primary. The transformer secondary windings are coupled to a second 6 diode bridge to produce a DC voltage level which is fed back to drive the control element.