The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2009
Filed:
Aug. 05, 2005
Vincent Thiery, La Roque d'Antheron, FR;
Bruno Charles Nadd, Lourmarin, FR;
Thomas J. Ribarich, Laguna Beach, CA (US);
John Ribarich, Laguna Beach, CA (US);
Vincent Thiery, La Roque d'Antheron, FR;
Bruno Charles Nadd, Lourmarin, FR;
Thomas J. Ribarich, Laguna Beach, CA (US);
John Ribarich, Laguna Beach, CA (US);
International Rectifier Corporation, El Segundo, CA (US);
Abstract
A power converter provides constant load power while achieving a high power factor in a single stage configuration with reduced component count and ratings. The power converter takes a rectified line input to a switching half-bridge that supplies current to a load. A series combination of shunt switch and capacitor is connected across the load to store energy from the input and supply energy to the load. The switches are operated with conduction angles that achieve constant power supplied to the load while drawing a sinusoidal current in phase with the input voltage to achieve high power factor. The circuit provides a simplified configuration over prior power converters that may be used with a resonant load as part of an electronic ballast or an AC-to-DC converter. The power converter configuration and operation also achieves a low total harmonic distortion on the input line power.