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. 20, 2014
Filed:
Jan. 18, 2012
Frank Z. Feng, Loves Park, IL (US);
Dwight D. Schmitt, Rockford, IL (US);
Mark W. Metzler, Davis, IL (US);
Debabrata Pal, Hoffman Estates, IL (US);
Frank Z. Feng, Loves Park, IL (US);
Dwight D. Schmitt, Rockford, IL (US);
Mark W. Metzler, Davis, IL (US);
Debabrata Pal, Hoffman Estates, IL (US);
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Abstract
An AC-AC power converter supplies AC power to an AC motor having a plurality of motor windings and a case connected to a ground. The AC-AC power converter architecture includes an asymmetric phase shift autotransformer/rectifier unit (ATRU) that converts an AC input to a DC output, wherein the asymmetric phase shift ATRU generates a common-mode AC voltage across the asymmetric phase shift ATRU. The common mode voltage is diverted to ground through motor case parasitic capacitance via a common-mode voltage pull-down circuit connected between each phase of the ATRU AC input and the ground.