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:
Apr. 01, 2008
Filed:
Nov. 10, 2004
Mohammad N Marwali, Lewis Center, OH (US);
Terry D Bush, Westerville, OH (US);
Brian Heber, Delaware, OH (US);
Jeffery Powell, Lewis Center, OH (US);
Mohammad N Marwali, Lewis Center, OH (US);
Terry D Bush, Westerville, OH (US);
Brian Heber, Delaware, OH (US);
Jeffery Powell, Lewis Center, OH (US);
Liebert Corporation, Columbus, OH (US);
Abstract
This disclosure is concerned with devices and methods for voltage source transfer switching that reduces or eliminates transformer saturation due to DC flux built up during a transfer event. First and second voltage sources (primary and alternate) are connectable to a load via corresponding switches. A transformer is connected downstream of the switches. A controller operates the switches according to various transfer methods wherein a switching time is determined to minimize downstream saturation current.