Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Patent
1991-05-28
1992-06-23
Pascal, Robert J.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
315226, 315DIG7, H05B 3700
Patent
active
051246198
ABSTRACT:
A circuit (100) for driving a gas discharge lamp load (102, 104, 106) and including: an inverter (112) receiving a unidirectional voltage output and producing an alternating voltage, and having a control input (156, 166); a series-resonant oscillator (126) coupled to the inverter output (116) and having an inductance (128) and a capacitance (130) in series for producing an alternating current; an output transformer (134) coupling the lamp load to the oscillator in series with the inductance and in parallel with the capacitance; and a feedback transformer (146) having a primary winding (148) coupled in parallel with the output transformer and coupled in series with the capacitance and a secondary winding (150, 152) coupled to the control input of the inverter. Since the feedback transformer primary winding carries only capacitive current (I.sub.C), the frequency of the circuit is substantially independent of the load. This allows the feedback transformer to be of the non-saturating-core type while retaining control of the oscillator frequency. Also, the circuit automatically shuts down in the event of load short-circuit.
REFERENCES:
patent: 4525649 (1985-06-01), Knoll et al.
patent: 5047690 (1991-09-01), Nilssen
Crouse Kent E.
Moisin Mihail S.
Motorola Inc.
Pascal Robert J.
LandOfFree
Circuit for driving a gas discharge lamp load does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit for driving a gas discharge lamp load, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for driving a gas discharge lamp load will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-935409