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. 29, 2009
Filed:
Jun. 07, 2007
Nitinkumar R. Patel, Cypress, CA (US);
Brian a Welchko, Torrance, CA (US);
Bonho Bae, Torrance, CA (US);
Steven E. Schulz, Torrance, CA (US);
Nitinkumar R. Patel, Cypress, CA (US);
Brian A Welchko, Torrance, CA (US);
Bonho Bae, Torrance, CA (US);
Steven E. Schulz, Torrance, CA (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
Methods and systems are provided for controlling permanent magnet machines. The method includes determining a maximum torque of the PM machine based on an error between a commanded d-axis flux and an estimated d-axis flux of the PM machine, and adjusting a torque command based on the maximum torque. The error associated with a variation between a current temperature and a nominal temperature of the PM machine.