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:
Feb. 09, 2010
Filed:
May. 03, 2007
Steven E. Schulz, Torrance, CA (US);
Sean E Gleason, West Bloomfield, MI (US);
Brian a Welchko, Torrance, CA (US);
Steven E. Schulz, Torrance, CA (US);
Sean E Gleason, West Bloomfield, MI (US);
Brian A Welchko, Torrance, CA (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
Methods and systems are provided for aligning a resolver in an electric motor system. The method includes commanding a d-axis current command and a speed command, operating an electric motor without a load in response to the d-axis current command and the speed command, determining a rotor speed in response to the speed command, and determining an offset of the resolver based on the speed command and the rotor speed when the rotor speed has substantially stabilized.