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. 21, 2001
Filed:
Oct. 05, 1999
Applicant:
Inventors:
Kevin R. Covi, Glenford, NY (US);
Edward J. Seminaro, Milton, NY (US);
Steven Shevach, Hurley, NY (US);
Dale F. Sorenson, Ruby, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 7/00 ; H02H 3/20 ;
U.S. Cl.
CPC ...
H02H 7/00 ; H02H 3/20 ;
Abstract
An over-voltage protection circuit for power supplies employing phase-shift controllers is provided. The power supplies typically comprise a redundant system for maintaining availability of bus voltage in the event of the failure of one of the supplies. The circuitry provides advantages in high power applications over prior art by overcoming the inefficiencies of connecting the supplies to a common bus through a diode. Additional circuitry eliminates the false shutdown of working power supplies.