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US 4,109,307 AGranted
High power factor conversion circuitry
AssigneeGTE Sylvania Incorporated
InventorWilliam C. Knoll
Life of this patent
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Abstract
A high power factor conversion circuit suitable as a ballast circuit for lamps includes a full-wave rectifier coupled to an AC potential source and providing a pulsating DC potential. A high frequency inverter is coupled to a load circuit and to a feedback rectifier circuit supplying a rectified high frequency potential to an energy storage feedback circuit which provides energy in a manner to inhibit a decline in the pulsating DC potential thereby providing a substantially uniform DC potential to the high frequency inverter.
Claims9
A high power factor conversion circuit comprising:
- an AC potential source;
- a full-wave DC rectifier means coupled to said AC potential source and providing a pulsating DC potential;
- a high frequency inverter means coupled to said DC rectifier means and including a series connected inductor and capacitor circuit;
- a load circuit coupled to said series connected inductor and capacitor circuit of said high frequency inverter means;
- a feedback rectifier circuit means coupled to said high frequency inverter means;
- and
- feedback circuit means including a series connected isolating diode and charge storage capacitor shunting said DC rectifier means with a junction therebetween coupled to said feedback rectifier circuit whereby high frequency energy from said inverter means is applied to said charge storage capacitor and utilized to convert said pulsating DC potential to a substantially uniform DC potential.
4 more elements
Dependencies are inferred from the claim text.