Electronic ballast system for emergency lighting applications

Details Electronic ballast system for emergency lighting applications Electronic ballast system for emergency lighting applications

2005-04-05

2005-04-05

Dinh, Trinh Vo (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S224000, C315S2090SC, C315S376000, C315S312000

Reexamination Certificate

active

06876159

ABSTRACT:
An electronic ballast system with emergency lighting features is presented. Especially, the electronic ballast system is relative to a single-stage converter configuration. The electronic ballast system serves as a regular ballast, a regular/emergency ballast, a battery charger or discharger and a power failure detector, fulfilling emergency lighting features. The single-stage converter used in the ballast is an integration of a bi-directional flyback converter and two half-bridge series-resonant parallel-loaded inverters. Unlike conventional approaches, the rectified and filtered input voltage is directly added to a set of battery voltages in the proposed system, so as to reduce the fabrication cost by simplifying the circuit configuration and the number of active switching elements.

REFERENCES:
patent: 6624599 (2003-09-01), Chen et al.
patent: 6664743 (2003-12-01), Langeslag et al.
patent: 20030197477 (2003-10-01), Hsieh

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