Design Data for a Multiple Output DC Regulator System

The analysis of a new multiple output dc regulating system is presented. Regulation is achieved by switching between two ac levels in the primary of the power transformer. One output is precisely regulated because it is used for control purposes. The other outputs are essentially independent of line voltage, but do have regulation associated with the voltage drops in their filter inductors and rectifiers. Equations needed for design are plotted in a normalized manner. Load current must not become less than the critical current required by the filter inductor if regulation is to be maintained. A design example illustrates use of the information presented. Basic circuit concepts are included.