Energizing arrangement for a discharge lamp

Details Energizing arrangement for a discharge lamp Energizing arrangement for a discharge lamp

1988-06-24

1990-03-27

Laroche, Eugene R.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Regulator in shunt to the load device

315107, 315289, 315205, 315207, 315208, 315224, G05F 100, H05B 3702

Patent

active

049123750

ABSTRACT:
A discharge lamp energizing arrangement comprises a starter and a generator adapted to maintain a discharge current in the lamp. The generator includes a first circuit arranged to couple in series a D.C. voltage source, a first switch and a second switch. When the first switch is closed the second is open and vice versa. A second circuit, arranged to couple an inductance and the lamp in series, is connected in parallel with the second switch. The switches are operated by a first control means which employs the signals received from an oscillator. The starter includes a third switch connected in parallel with the lamp terminals. The third switch is operated by a second control means itself operated by the first control means. When the energizing arrangement is turned on the third switch is closed and it subsequently reopens on the first occasion that the first switch passes from the closed to the open state.

REFERENCES:
patent: 3890537 (1975-06-01), Park et al.
patent: 4101809 (1978-07-01), Morais
patent: 4649322 (1987-03-01), Tellan et al.
patent: 4766350 (1988-08-01), Husgen et al.

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