Lamp power supply using a switching regulator and commutator

Details Lamp power supply using a switching regulator and commutator Lamp power supply using a switching regulator and commutator

1975-05-19

1976-12-21

La Roche, Eugene

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315205, 315208, 315224, 315287, 315291, 315DIG5, 321 19, 321 45C, H05B 4136, G05F 108

Patent

active

039991008

ABSTRACT:
A power supply for an ac metal halide lamp employs a dc regulator in conjunction with a commutator for supplying the regulated dc power to the lamp with alternating polarity. A feedback circuit senses the dc voltage and current fed to the commutator and cooperates with the regulator to provide substantially constant power to the lamp. The commutator switching times are sufficiently rapid so that flickerless light output is obtained.

REFERENCES:
patent: 3486070 (1969-12-01), Engel
patent: 3590316 (1971-06-01), Engel et al.
patent: 3648106 (1972-03-01), Engel et al.
patent: 3890537 (1975-06-01), Park et al.
patent: 3909668 (1975-09-01), Laakmann et al.

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