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:
Aug. 27, 2013
Filed:
Jul. 22, 2011
Gabriel Gallegos-lopez, Lomita, CA (US);
Min Dai, Torrance, CA (US);
Brian A. Welchko, Torrance, CA (US);
Gabriel Gallegos-Lopez, Lomita, CA (US);
Min Dai, Torrance, CA (US);
Brian A. Welchko, Torrance, CA (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Methods and apparatus are provided for rotor and stator temperature compensation for field weakening current. The method comprises generating a phase voltage feed back signal Vbased in part on pre-defined optimal current commands (I* and I*) received by the IPM, generating a phase voltage command (V) based in part on a temperature of a magnetic rotor and stator of the IPM, and generating a phase voltage error (V) by subtracting the phase voltage feed back signal (V) from the phase voltage command (V). The method further comprises generating a d-axis command current correction value (ΔI) and a q-axis command current correction value (ΔI) from the phase voltage error (V); and adjusting the pre-defined optimal current commands (I* and I*) by the d-axis and the q-axis command current correction values (ΔIand ΔI).