Lockheed Martin Corporation

Richard M Brosh

Scott C Willis

Charles A Dennis

A power distribution system in which the loads are connected in series to a current source. At each load, a current source to voltage source convertor provides alternative current paths. A serial power distribution current path includes a modulated switch (e.g. a pulse width modulated switch) to control the amount of power delivered to the load via a load current path. The load current path includes a diode which couples a capacitor across the switch, providing a semi-regulated voltage input to a d.c. to d.c. convertor connected across the capacitor. The d.c. to d.c. convertor provides a regulated output voltage, which is connected to the load. The control circuit for modulating the opening and closing of the switch is connected in parallel across the capacitor.

Fault tolerant power distribution

A power bus digital communication system reduces power and signal cabling in a space satellite by transformer coupling digital signal sources to power bus circuits, the transformer coupling devices in all power bus circuits being in parallel relation and electrically isolated from a power supply whereby the digital communication sources may communicate among themselves at a DC power level using a square wave modulated according to a Manchester code.

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Woodbridge, VA, United States of America

Richard M Brosh