Advanced Power Processing Techniques for DC to DC Converters.

摘要

The feasibility of efficient ultra light weight dc power supplies was investigated and confirmed. The results of this study were embodied in a 190 Watt model, which indicates a component density of 126 W/kg. Power was derived from a source with the range from 22 to 32 VDC. Four output channels provide + or -5 VDC and + or -15 VDC, respectively. Each output channel has the characteristic of a current source, is individually controlled and maintains a 0.1 percent static accuracy, independent of the loading, or overloading of any or all of the other output channels. The system was also shown to be short circuit proof at any and all of the output channels. The full power efficiency of the system was measured at 73.35 percent. This efficiency could be further improved with the use of power Litz wire throughout the system and with the availability of power components with suited terminals for the relatively high currents. No intrinsic barrier was found to a further increase of the internal frequency of 50 kHz with its significant higher harmonic content. Efficiencies in excess of 95 percent were attained at the 1 kW level at input/output voltages near 200 VDC and with the same internal converter frequencies. (Author)