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:
Jul. 16, 2013
Filed:
Sep. 28, 2009
Chia-chou Yeh, Gardena, CA (US);
Nitinkumar R. Patel, Cypress, CA (US);
Yo Chan Son, Torrance, CA (US);
Steven E. Schulz, Torrance, CA (US);
Chia-Chou Yeh, Gardena, CA (US);
Nitinkumar R. Patel, Cypress, CA (US);
Yo Chan Son, Torrance, CA (US);
Steven E. Schulz, Torrance, CA (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A temperature estimation controller and methods are provided for estimating stator winding temperature over a full range of motor operating speeds. In one implementation, the angular velocity of a motor is determined along with a total power loss for each phase of said motor. The total power loss in each phase comprises stator winding power loss and a core power loss. Stator winding temperatures for each phase of motor can then estimated based on the total power loss in that phase, and a combined thermal impedance for that phase. The combined thermal impedance comprises a first thermal impedance between the stator winding and the stator core, and a second thermal impedance between the stator core and the motor coolant.