Two level inverter circuit

Details Two level inverter circuit Two level inverter circuit

H - Electricity

05

B

315/23

H05B 41/00 (2006.01)

Patent

CA 1110317

ABSTRACT OF THE DISCLOSURE An emergency lighting system includes a two-level switching transistor inventor circuit for starting and operating a fluorescent lamp from a battery upon failure of line voltage. One of the switching transistors of the two transistor inverter is arranged for connection first to a tap, then to one of the feed-in terminals of an output transformer coupled with the lamp. A timing controller effects this switching thereby to provide, first, a high power level for starting the lamp, and then, a second lower power level for operating the lamp after starting.

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