H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/63
H05B 41/24 (2006.01) H05B 41/292 (2006.01)
Patent
CA 1256936
PHD 83038 13 1.2.1985 ABSTRACT: Circuit arrangement for A.C. operation of high-pressure gas discharge lamps. In a circuit arrangement for A.C. operation of high-pressure gas discharge lamps comprising a mains alternating voltage source (A', B') and a high-frequency oscillator (3) which is supplied with direct current and which produces a high-frequency current through the lamp superimposed on the mains alternating lamp current, this oscillator comprising a high-frequency transformer (7) and a transistor (11) which is connected in series with its primary (8) and can be periodically switched on and off, a secondary (9) of the transformer being connected in series with the lamp, for reducing losses, the ratio between switching-on and switching-off time (duty cycle) of the transistor (11) is chosen so small that the effective value of the high-frequency current coupled into the lamp lies between 0.05 and 5 % of the mains alternating lamp current, while an auxiliary device (16 to 19,25) is provided, which interrupts the process of periodically switching on and off the transistor (11) outside the proximity of the zero passages of the mains alternating lamp current.
476000
Ganser Hans-Gunther
Schafer Ralf
Stormberg Hans-Peter
Fetherstonhaugh & Co.
N.v.philips'gloeilampenfabrieken
LandOfFree
Circuit arrangement for a.c. operation of high- pressure gas... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit arrangement for a.c. operation of high- pressure gas..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit arrangement for a.c. operation of high- pressure gas... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1240171