Modular lighting control with circulating inductor

Details Modular lighting control with circulating inductor Modular lighting control with circulating inductor

1984-04-03

1985-06-11

Moore, David K.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315194, 315284, 315308, 315DIG4, H05B 41392

Patent

active

045231290

ABSTRACT:
The invention is directed to a circuit and a method for efficiently controlling the output illumination level in gas discharge lighting arrangements. Load side control is provided by a timed interval controlled impedance, serially coupled between the ballast and the lamp(s). A circulating inductor, coupled in parallel with the controlled impedance, provides a current path between the power source and the lamp(s) at least during that portion of the AC waveform where the controlled impedance is in a substantially non-conducting state.

REFERENCES:
patent: 3878431 (1975-04-01), Petrina
patent: 3894265 (1975-07-01), Holmes et al.
patent: 3935505 (1976-01-01), Spiteri
patent: 3936696 (1976-02-01), Gray
patent: 3991344 (1976-11-01), Tabor
patent: 4001637 (1977-01-01), Gray
patent: 4197485 (1980-04-01), Nuver
patent: 4207497 (1980-06-01), Capewell et al.
patent: 4207498 (1980-06-01), Spira et al.
patent: 4464610 (1984-08-01), Pitel

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