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. 03, 2012
Filed:
Apr. 09, 2009
Applicants:
Sastry V. Vedula, Loves Park, IL (US);
Carl A. Wagner, Beloit, WI (US);
Inventors:
Sastry V. Vedula, Loves Park, IL (US);
Carl A. Wagner, Beloit, WI (US);
Assignee:
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 5/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method comprises determining whether a ground fault on a bus () operative to drive the system () exceeds a first threshold level, () receiving values of phase currents of a first motor, () calculating a sum of the values of the phase currents of the first motor () responsive to determining that the ground fault on the bus exceeds the first threshold value, and () determining whether the sum of the values of the phase currents of the first motor () exceeds a second threshold value ().