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Spacecraft electrical power subsystems require continuous monitoring, ground supported analysis of performance, and ground intervention to provide power management and fault correction. An interplanetary fly-by mission to the outer planets necessitates long periods of relatively low activity between encounters. It would be desirable to minimize ground access and support during these times if it can...
This paper discusses methods of generating high voltage waveforms (up to several thousand volts) at modest power levels (several ten's of watts). The circuit techniques and system configurations which involve Parallel Series Chains (PSC) of Light Triggered Bilateral Switches (LTBS) are new and employ all solid state components. The circuit and system techniques discussed show how small, light weight,...
The initial spacecraft of the Earth Resources Technology Satellite Program, ERTS-1, was launched on July 23, 1972, and has provided broad earth resource data for use by numerous governmental and scientific agencies. This paper reports on the basic design and flight performance to date of the ERTS-1 power system. The design is based on earlier Nimbus spacecraft power system configurations with modifications...
Modem high power spacecraft operating in near earth orbit require efficient switching regulation in both battery charge and discharge control. In the past, the charge and discharge functions have been performed by separate power conditioners with separate power inductors, power filter capacitors, as well as separate duty cycle control modulators. In an effort to reduce weight, complexity, cost, and...
Spacecraft power systems utilizing radioisotope thermoelectric generators CRTGs) as primary power sources present an uncommon set of require ments and limitations for interfacing dc-to-dc converters. A converter configuration is presented that complements these RTG characteristics. The circuit is a variation of the basic flyback regulator modified to provide input regulation. The converter has two...
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