Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Flashers
Patent
1986-11-07
1988-05-31
Moore, David K.
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Flashers
315205, 315226, 315253, 315265, 315272, 315275, 315307, 315308, 315DIG7, 315208, 315227R, 315283, 307 64, 307 65, 307 66, 363 37, H05B 4116, H05B 4124
Patent
active
047483814
ABSTRACT:
A circuit arrangement for A.C. operation of gas discharge lamps comprises a full-wave rectifier (1) connected to an alternating voltage source. The direct voltage is supplied to a combinatorial circuit part (3 to 8) in the form of a direct voltage converter, to which is connected a bridge circuit (9) which comprises four thyristors. The transverse branch of the bridge circuit includes the lamp (5). The full-wave rectifier (1) is followed by a smoothing capacitor (2) and an electronic switching element (14) is connected parallel to the bridge circuit (9). The switching element is switched to the conducting state in the vicinity of the zero passages of the input alternating voltage. As a result shortcircuits in the bridge circuit are avoided.
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Ganser Hans-Gunther
Schafer Ralf
Stormberg Hans-Peter
Franzblau Bernard
Moore David K.
Nickerson Michael J.
Treacy David R.
U.S. Philips Corporation
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