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:
Oct. 02, 2012
Filed:
Sep. 24, 2009
Brian A. Welchko, Torrance, CA (US);
Silva Hiti, Redondo Beach, CA (US);
Abbas Raftari, West Bloomfield, MI (US);
Jeong J. Park, Ann Arbor, MI (US);
Hanne Buur, Brighton, MI (US);
Brian A. Welchko, Torrance, CA (US);
Silva Hiti, Redondo Beach, CA (US);
Abbas Raftari, West Bloomfield, MI (US);
Jeong J. Park, Ann Arbor, MI (US);
Hanne Buur, Brighton, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Methods and systems are provided for monitoring an automotive electrical system including an inverter having at least one switch. First and second voltage commands corresponding to respective first and second components of a commanded voltage vector on a synchronous frame of reference coordinate system are received. A plurality of duty cycles for operating the at least one switch are calculated based on the first and second voltage commands. First and second actual voltages are calculated based on the plurality of duty cycles. The first and second actual voltages correspond to respective first and second components of an actual voltage vector on the synchronous frame of reference coordinate system. An indication of a fault is generated based on the difference between the first components of the commanded voltage vector and the actual voltage vector and the difference between the second components of the commanded voltage vector and the actual voltage vector.