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:
Sep. 18, 2012
Filed:
Oct. 20, 2009
Nitinkumar R. Patel, Cypress, CA (US);
Peter J. Savagian, Bloomfield Hills, MI (US);
Yo Chan Son, Torrance, CA (US);
Rostam Dehmoobed Nasrabadi, Proter Ranch, CA (US);
Nitinkumar R. Patel, Cypress, CA (US);
Peter J. Savagian, Bloomfield Hills, MI (US);
Yo Chan Son, Torrance, CA (US);
Rostam Dehmoobed Nasrabadi, Proter Ranch, CA (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Methods and apparatus are provided for a limp home operational mode for an electric motor system. The method includes determining whether a resolver has failed. When the resolver has not failed, operation of the electric motor system uses resolver signals. When the resolver fails, operation of the electric motor system uses sensorless rotor position and rotor speed signals.