A 28 Volt, 0 to 150 AMP Power Supply Incorporating a Multi-Section Morgan Chopper

A novel technique has been developed which enables a Morgan Chopper to be used in a system having wide input voltage and load current variations. A multi-section Morgan Chopper is programmed as a function of these variables to maintain a more constant chopping frequency. This and other special circuit techniques have been incorporated in a production 28 volt power supply which regulates better than ± 1% over wide input voltage and load current variations. One version of this supply having output capability of 4200 watts is packaged in a full ATR case and weight 75 pounds (figure 1).