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:
May. 10, 1994
Filed:
Aug. 13, 1993
Applicant:
Inventors:
Stephen J Malloy, Manassas, VA (US);
Kirk J Treubert, Fairfax, VA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
307 87 ; 307 66 ; 307 64 ; 307 82 ;
Abstract
A method for the transferring of 3 phase, asynchronous AC power between a present source supplying power to a load and an alternative source to supply power to the load. The maximum phase displacement is 60 electrical degrees at the load. The transfer can occur between sources which are rotating 'forward' or 'backward' with respect to each other or jointly with respect to the load. Either present source, alternate source or the load may be used as the timing reference for determining best phase connection of the alternate source to the load.