Extending the life of incandescent lamps by power factor modulat

Details Extending the life of incandescent lamps by power factor modulat Extending the life of incandescent lamps by power factor modulat

1997-07-22

1999-04-20

Wong, Don

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Discharge device load

315 62, 315194, H05B 3700

Patent

active

058960090

ABSTRACT:
A non-saturating inductor is connected in series with the filament of an incandescent lamp and the increase in resistance of the filament with respect to the increase in temperature is utilized to dynamically modulate the power factor of the circuit during a warm-up interval immediately following lamp turn-on.

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patent: 4629943 (1986-12-01), Ponce, Jr.
patent: 4988923 (1991-01-01), Masaki
patent: 5012157 (1991-04-01), Walton et al.
patent: 5066892 (1991-11-01), Bouchard et al.
patent: 5504394 (1996-04-01), Johnson

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