Plural ferro-resonant power supplies for powering a magnetron wh

Details Plural ferro-resonant power supplies for powering a magnetron wh Plural ferro-resonant power supplies for powering a magnetron wh

1996-03-08

1998-11-17

Pascal, Robert J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

315248, 315176, H05B 3702

Patent

active

058381147

ABSTRACT:
A power supply quickly restarts an electrodeless lamp which is temporarily turned off in an application using microwave radiation generated by a magnetron. When the electrodeless lamp operates in a full power mode, the power supply provides full power to the magnetron via high DC current and high DC voltage. When a user selectively switches the electrodeless lamp off, less power is provided to the magnetron than in the full power mode. In the reduced power mode, the magnetron generates sufficient microwave radiation to maintain the bulb plasma in an ignited condition while the lamp produces substantially no light output. This eliminates the required cooldown delay associated with the lamp shut down and quickly brings the lamp to the full power operation when requested by the user.

REFERENCES:
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patent: 4001632 (1977-01-01), Haugsjaa et al.
patent: 4175246 (1979-11-01), Feinberg et al.
patent: 4189661 (1980-02-01), Haugsjaa et al.
patent: 4219760 (1980-08-01), Ferro
patent: 4320325 (1982-03-01), Anderson
patent: 4739227 (1988-04-01), Anderson
patent: 5115168 (1992-05-01), Shoda et al.
patent: 5216333 (1993-06-01), Nuckolls
patent: 5287039 (1994-02-01), Gregor et al.
Atsuo et al. Japanese English abstract of JP2,044,695 Fan. 8, 1988.

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