NDLI: Direct current ballast circuit for metal halide lamp

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Direct current ballast circuit for metal halide lamp

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1981
Description	A direct current ballast circuit for a two electrode metal halide lamp is described. Said direct current ballast circuit includes a low voltage DC input and a high frequency power amplifier and power transformer for developing a high voltage output. The output voltage is rectified by diodes and filtered by inductor and capacitor to provide a regulated DC output through commutating diodes to one terminal of the lamp at the output terminal. A feedback path from the output of the filter capacitor through the bias resistor to power the high frequency circuit which includes the power amplifier and the power transformer for sustaining circuit operations during low voltage transients on the input DC supply is described. A current sensor connected to the output of the lamp through terminal for stabilizing lamp current following breakdown of the lamp is described.
File Size	1117153
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19820016551
Archival Resource Key	ark:/13960/t6xw97p21
Language	English
Publisher Date	1981-09-14
Access Restriction	Open
Subject Keyword	Electronics And Electrical Engineering Ballasts Impedances Resistors Feedback Circuits Direct Current Capacitors Metal Halides Amplifiers Luminaires Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Patent

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