DC/AC converter for igniting and operating a discharge lamp

Details DC/AC converter for igniting and operating a discharge lamp DC/AC converter for igniting and operating a discharge lamp

1985-03-15

1990-08-28

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315226, 315243, 315DIG5, 315DIG7, H05B 4129

Patent

active

049528459

ABSTRACT:
A DC/AC converter (8) having a half bridge circuit for igniting and feeding a gas and/or vapour discharge tube (1). A starting capacitor (94) of this converter is connected between a junction (A) between two branches--each comprising a semiconductor circuit element (60 and 61)--of the half bridge circuit on the one hand and a center tapping (E) of a voltage divider (90, 91) on the other hand. As a result, the converter (8) starts satisfactorily and hence the discharge tube (1) readily ignites, moreover undesired starting pulses during the operating condition are avoided.

REFERENCES:
patent: 3740609 (1973-06-01), Moerkens
patent: 4370600 (1983-01-01), Zansky
patent: 4461980 (1984-07-01), Nilssen
patent: 4588924 (1986-05-01), Luursema et al.

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