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:
Feb. 10, 2009
Filed:
Nov. 02, 2006
Zhenxing Fu, Ann Arbor, MI (US);
Lars Weinschenker, Royal Oak, MI (US);
Jingchuan LI, Troy, MI (US);
Zhenxing Fu, Ann Arbor, MI (US);
Lars Weinschenker, Royal Oak, MI (US);
JingChuan Li, Troy, MI (US);
Chrysler LLC, Auburn Hills, MI (US);
Daimler AG, Stuttgart, DE;
GM Global Technology Operations, Inc., Detroit, MI (US);
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
A method of controlling a brushless direct current motor without a position sensor. The motor includes a plurality phase windings adapted to be energized by an active inverter circuit that synchronously applies drive voltages through a plurality of phases to produce drive currents in the phase windings. Back electromotive force voltages are detected when the inverter circuit is inactive for sensorless detection of motor position.