Starting circuit for an electrodeless high intensity discharge l

Details Starting circuit for an electrodeless high intensity discharge l Starting circuit for an electrodeless high intensity discharge l

1990-05-23

1991-10-22

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315344, 313234, H05B 4124

Patent

active

050598686

ABSTRACT:
A starting circuit for an electrodeless high intensity discharge lamp comprises a high efficiency power supply for providing a radio frequency signal to a starting probe disposed proximate the arc tube of the lamp. The power supply may comprise either a Class-D or Class-E power amplifier having an output resonant circuit tuned to a substantially higher frequency than the operating frequency of the signal provided to the excitation coil by the lamp ballast to ensure minimal interaction between the starting circuit and the ballast. The output resonant circuit includes an inductance coupled in series with a capacitance that preferably comprises the capacitance between the excitation coil and the starting probe. After initiating the arc discharge, the starting circuit is deactivated.

REFERENCES:
patent: 4245178 (1981-01-01), Justice
patent: 4383203 (1983-05-01), Stanley
patent: 4390813 (1983-06-01), Stanley
patent: 4748383 (1988-05-01), Houkes
patent: 4810938 (1989-03-01), Johnson et al.
patent: 4812702 (1989-03-01), Anderson
patent: 4894589 (1990-02-01), Borowiec
patent: 4894590 (1990-02-01), Witting
patent: 4902937 (1990-02-01), Witting
patent: 4959592 (1990-09-01), Anderson

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