Electricity: power supply or regulation systems – In shunt with source or load – Using a three or more terminal semiconductive device
Patent
1986-07-01
1989-03-14
Salce, Patrick R.
Electricity: power supply or regulation systems
In shunt with source or load
Using a three or more terminal semiconductive device
323266, 363 89, 315DIG7, G05F 156
Patent
active
048127361
ABSTRACT:
A circuit for operating high-pressure gas discharge lamps comprises a full-wave rectifier (2) which is connected to an alternating voltage supply source and supplies an output direct voltage to a combinatorial circuit part comprising a switching transistor (3), a choke coil (4), a fly-wheel diode (5) and a storage capacitor (6), from which the lamp is energized. A further combinatorial circuit part (7, 8, 10, 11) comprises at least one electronic circuit element (7) coupled between the storage capacitor (6) and the lamp (9) and is controlled by a control device (12). The control device compares an instantaneous lamp current of higher frequency with a nominal-value signal composed of a sinusoidal voltage component having double the supply frequency and a d.c. voltage component having a value of at least the maximum amplitude of the sinusoidal voltage.
REFERENCES:
patent: 3890537 (1975-06-01), Park et al.
patent: 4042856 (1977-08-01), Steigerwald
patent: 4459537 (1984-07-01), McWhorter
patent: 4481460 (1984-11-01), Kroning et al.
Conference: Intelec '81, Third International Telecommunications Energy Conference, Grossoni et al, London, England, May 19-21, 1981, pp. 282-287.
Albach Manfred
Schafer Ralf
Stormberg Hans-Peter
Wegener Armin
Franzblau Bernard
Peckman Kristine
Salce Patrick R.
U.S. Philips Corp.
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