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:
May. 01, 2007
Filed:
Nov. 09, 2004
Applicants:
Nitinkumar R. Patel, Cypress, CA (US);
Steven E. Schulz, Torrance, CA (US);
Thomas P. O'meara, Redondo Beach, CA (US);
Inventors:
Nitinkumar R. Patel, Cypress, CA (US);
Steven E. Schulz, Torrance, CA (US);
Thomas P. O'Meara, Redondo Beach, CA (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 21/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of starting a permanent magnet machine. A machine stator voltage in a stationary reference frame is sensed. An initial speed of a rotor of the machine is estimated based on the sensed voltage, and state variables of control algorithms are initialized based on the estimated initial speed. This method can provide smooth startup and/or restart at any speed.