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:
Aug. 31, 2010
Filed:
Jun. 27, 2007
Kevin R. Covi, Glenford, NY (US);
Raymond J. Harrington, Staatsburg, NY (US);
Robert P. Makowicki, Staatsburg, NY (US);
Steven G. Shevach, Hurley, NY (US);
Dale F. Soreson, Ruby, NY (US);
Brain C. Tucker, Hyde Park, NY (US);
Kevin R. Covi, Glenford, NY (US);
Raymond J. Harrington, Staatsburg, NY (US);
Robert P. Makowicki, Staatsburg, NY (US);
Steven G. Shevach, Hurley, NY (US);
Dale F. Soreson, Ruby, NY (US);
Brain C. Tucker, Hyde Park, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A protection circuit for a parallel power system having at least two parallel coupled voltage regulators is disclosed. The protection circuit includes at least two isolation control circuits, each control circuit being coupled to a respective voltage regulator. Each isolation control circuit includes a current sense circuit for sensing current polarity at an output of the respective voltage regulator, and a controller for automatically isolating the respective voltage regulator when an over-voltage condition exists at an output of the parallel power system and a positive current polarity is sensed at the output of the respective voltage regulator. The at least two isolation control circuits isolate only a voltage regulator having positive current outflow during the over-voltage condition. In one embodiment, each isolation control circuit further includes an over-voltage detection circuit for detecting when the over-voltage condition exists at the output of the parallel power system.