A dual-output d.c. power converter

Electrical equipment often requires power supplies which can furnish several regulated d.c. voltages of the same or opposite polarity. This generally implies a multi-winding power transformer with separate rectifiers and regulators for each voltage. This paper describes a novel d.c.-to-d.c. power converter which provides two independently controlled output voltages, of the same or opposite polarity, from a single power handling switching transistor and a single input voltage. The converter can operate with high efficiency. Circuit complexity and cost are significantly reduced as compared to conventional solutions. The dual-output power converter is an interesting example of a relay system with two input and two output variables. A state-space method is developed for the analysis of this system class, and a theoretical and experimental investigation of the converter circuit is undertaken.