Dual mode solid state inverter circuit for starting and ballasti

Details Dual mode solid state inverter circuit for starting and ballasti Dual mode solid state inverter circuit for starting and ballasti

1976-03-01

1977-11-29

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315DIG2, 315DIG5, 315239, 315297, 315241R, 315242, 331113A, H05B 3702, H05B 3904, H05B 4136

Patent

active

040607518

ABSTRACT:
A variable frequency ac source drives a gas discharge lamp connected as a damping element in an otherwise high Q L-C circuit. Commutation of the ac source voltage is initiated as the instantaneous current drawn from the source equals a predetermined reference current level. Prior to lamp ignition the ac source drives the L-C circuit at resonance causing a voltage buildup which initiates an ignition. After ignition the source limits lamp current to provide a ballasting function.

REFERENCES:
patent: 3146406 (1964-08-01), Wilting
patent: 3319180 (1967-05-01), Mesenhimer
patent: 3611021 (1971-10-01), Wallace
patent: 3671804 (1972-06-01), Church
patent: 3723848 (1973-03-01), Miller
patent: 3754160 (1973-08-01), Jensen
patent: 3781638 (1973-12-01), Anderson et al.
patent: 3927363 (1975-12-01), Mitchell et al.
patent: 3953780 (1976-04-01), Anderson et al.
patent: 4005335 (1977-01-01), Perper

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