Power feedback power factor correction high frequency inverter

Details Power feedback power factor correction high frequency inverter Power feedback power factor correction high frequency inverter

2006-04-04

2006-04-04

Patel, Rajnikant B. (Department: 2838)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S299000, C315S276000

Reexamination Certificate

active

07023148

ABSTRACT:
An electronic high frequency supply, such as lamp ballast, includes a double rectifier, two storage Capacitors in series, and an isolating inductor between rectifier and an AC input. Each storage capacitor is charged to a voltage greater than peak of the AC input. An inverter is connected to the storage capacitors, and has a high frequency inductive load circuit connected between inverter output and a junction between the isolating inductor and double rectifier. A capacitor, connected from the junction to the junction of two storage capacitors, forms a high frequency resonance circuit with the inductive load circuit. Current is drawn from the input AC only as a series of pulses at the inverter frequency. The isolating inductor filters out the high frequency part of the current pulse and makes the input current near sine wave.

REFERENCES:
patent: 6100648 (2000-08-01), Moisin

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