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. 02, 2005
Filed:
Jun. 23, 2003
Steven E. Schulz, Torrance, CA (US);
Nitinkumar R. Patel, Cypress, CA (US);
James M. Nagashima, Cerritos, CA (US);
Seung Ki Sul, Seoul, KR;
Bon-ho Bae, Seoul, KR;
Steven E. Schulz, Torrance, CA (US);
Nitinkumar R. Patel, Cypress, CA (US);
James M. Nagashima, Cerritos, 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 motor having a stator and rotor including an inverter for providing power to the electric motor, a controller for controlling the inverter, a low speed control block to estimate the rotor angular position using stator current components operating in the controller, a high speed control block to estimate the rotor angular position using stator current components and stator flux position operating in the controller, a transition switch in the controller to vary operation between the low speed control block and the high speed control block, and where the inverter is controlled by six step operation.