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:
Nov. 19, 2002
Filed:
Jun. 21, 2001
John C. Reynolds, Hanover, PA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
An electrical power distribution system and automatic bus transfer switch therefor, consisting of two pairs of insulated gate bipolar transistors (IGBTs) connected in series in a back-to-back circuit configuration with respective semiconductor diodes connected across the current conducting terminals thereof so as to provide a static AC switch configuration which implements a fight-through bus transfer switch wherein only one pair of switches is rendered conductive at any one time, wherein one transistor and a diode across the other transistor of the same pair conduct in each half cycle of the AC power waveform, and thus provide power to one or more load(s) from either of two AC sources, a primary AC source or an alternate AC source.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile