Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Flashers
Patent
1990-03-16
1991-04-23
Pascal, Robert J.
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Flashers
315205, 315225, 315226, 315307, 315DIG7, H05B 3702
Patent
active
050102770
ABSTRACT:
The invention relates to an electronic converter for supplying a constant amplitude output voltage while taking from the main supply only a sinusoidal current in phase with the voltage. This device is constituted by an auto-oscillator comprising transistors 7a and 7b for which the duty cycle is automatically regulated, a first inductance 10 constituting an oscillator circuit to which the output energy is evacuated, and second inductance taking off part of the high frequency energy produced to reapply it, after rectification, in series with the mains voltage rectified by the bridge 13, so that the voltage between the common polarized terminals of the auto-oscillator becomes continuous and held at a potential at least equal to the peak mains voltage, which translates into a continuous output voltage envelope. This device is applicable to the production of electronic transformers, power supplies, electronic ballasts, etc., without necessarily requiring electrolytic smoothing capacitors.
REFERENCES:
patent: 4104715 (1978-10-01), Lawson, Jr.
patent: 4109307 (1978-10-01), Knoll
patent: 4184128 (1980-01-01), Nilssen
patent: 4188650 (1980-02-01), Knoll
patent: 4382212 (1983-05-01), Bay
patent: 4700287 (1987-10-01), Nilssen
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