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:
Jan. 18, 2005
Filed:
Jan. 15, 2003
LI Chen, Livonia, MI (US);
Richard J. Hampo, Plymouth, MI (US);
Venkatapathi R. Nallapa, West Bloomfield, MI (US);
Li Chen, Livonia, MI (US);
Richard J. Hampo, Plymouth, MI (US);
Venkatapathi R. Nallapa, West Bloomfield, MI (US);
Ballard Power Systems Corporation, Dearborn, MI (US);
Abstract
Systems and methods for controlling an induction motor including detecting a field weakening operation state of the motor, wherein the field weakening operation state is detected when a flux current, I, in the motor is reduced to a predetermined fraction of its normal, non-voltage limited value. The systems and methods also including an overmodulation operation state of the motor before said field weakening operation state is detected and enabling the overmodulation operation state of the motor after said field weakening operation state is detected.