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:
Apr. 04, 2006
Filed:
Sep. 13, 2004
Nitinkumar R. Patel, Cypress, CA (US);
Steven E. Schulz, Torrance, CA (US);
Seung Ki Sul, Seoul, KR;
Bon-ho Bae, Seoul, KR;
Nitinkumar R. Patel, Cypress, CA (US);
Steven E. Schulz, Torrance, CA (US);
Seung Ki Sul, Seoul, KR;
Bon-Ho Bae, Seoul, KR;
General Motors Corporation, Detroit, MI (US);
Abstract
A control system for an electric machine includes a flux weakening module, which includes a voltage magnitude calculator that receives d-axis and q-axis command voltages and that generates a voltage magnitude. An error circuit compares the voltage magnitude to a reference voltage and generates an error signal. A controller receives the error signal and generates a feedback flux correction signal. A limiter limits the feedback flux correction signal to a predetermined flux value and generates a limited feedback flux correction signal. A feedforward stator flux generating circuit generates a feedforward stator flux signal. A summing circuit sums the feedforward stator flux signal and the limited feedback flux correction signal to generate a final stator flux command.