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. 26, 1986
Filed:
Nov. 09, 1984
David A Fox, Shawnee Township, Gallatin County, OH (US);
Donal E Baker, American Township, Allen County, OH (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A current limiting circuit for a DC to AC inverter is provided with means for sensing the current in the inverter output phases and means for switching all of the power poles to the polarity of the minority power pole when an overcurrent condition occurs. This reduces the switching current levels of the inverter power pole switches to reduce switching stresses and improve reliability. A current sensing scheme is illustrated in which self-excited transductors are used to sense the current in two of the three inverter output phases and the current in the remaining output phase is derived from these two sensed currents.