Emergency Lighting Systems and Battery Powered Fluorescent Lighting
نویسندگان
چکیده
Emergency l ight ing systems are frequently employed as a required safety feature within business premises. These systems comprise essentially of a control circuit, a battery pack, a trickle charging circuit, and either an in-built incandescent lamp, or an inverter that will allow the battery supply to drive the existing fluorescent tubes. It is the latter version, and the requisite DC-AC inverter that are addressed within this application note. Figure 1 presents a block diagram of a typical emergency lighting system. The control circuit monitors the mains supply, and if all is well, allows the charger to trickle charge the battery pack. In the event of the mains voltage failing, the controller then enables the inverter which provides sufficient power to a f luorescent tube to provide illumination.
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