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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 343 records · Page 19

Novel dielectric reduces corona breakdown in ac capacitors

Dielectric system was developed which consists of two layers of 25-gage paper separated by one layer of 50-gage polypropylene to reduce corona breakdown in ac capacitors. System can be used in any alternating current application where constant voltage does not exceed 400 V rms. With a little research it could probably be increased to 700 to 800 V rms.

Loehner, J. L.↗

Terminated capacitor-discharge firing of electroexplosive devices.

By terminating the discharge of energy into an insensitive electroexplosive device, firing-energy parameters can be determined. A simple capacitor-discharge system providing exponential pulses terminated at an adjustable width is described. Basic theory and application to testing are discussed.

Rosenthal, L. A.↗

Compact 20-kiloampere pulse-forming-network capacitor bank

Bank uses commercially available high-energy-density capacitors for energy storage and silicon-controlled rectifiers for switching. Low voltage design employing solid-state switching is utilized in lieu of conventional gas discharge switching.

Posta, S. J.↗

Frequency shifting with a solid-state switching capacitor

Frequency shifting, commonly used in electronic signal processing, is applied in tuning, automatic frequency control, antenna element switching, phase shifting, etc. Frequency shifting can be accomplished economically and reliably with simple circuit comprising conventional resistor and solid-state switching device which can be equivalent to two capacitors, depending on switching state.

Mattauch, R. J.↗