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:
Jul. 24, 2007
Filed:
Sep. 06, 2002
John G. Tracy, Raleigh, NC (US);
Frederick Tassitino, Jr., Wake Forest, NC (US);
Hans Pfitzer, Wake Forest, NC (US);
Rennie Bobb, Wake Forest, NC (US);
Julius Rice, Raleigh, NC (US);
John G. Tracy, Raleigh, NC (US);
Frederick Tassitino, Jr., Wake Forest, NC (US);
Hans Pfitzer, Wake Forest, NC (US);
Rennie Bobb, Wake Forest, NC (US);
Julius Rice, Raleigh, NC (US);
Eaton Power Quality Corporation, Cleveland, OH (US);
Abstract
A closed loop power converter circuit of a UPS or other power supply includes a pulse width modulator circuit in a forward path of the closed loop power circuit. A compensation circuit provides pulse width commands to the pulse width modulator at a first rate. A feedback circuit digitally filters samples of an output of the closed loop power converter at a second rate greater the first rate and that provides the filtered samples to the compensation circuit. In some embodiments, the compensation circuit may be operative to compensate for the phase lag associated with a low pass output filter.