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. 25, 2005
Filed:
Aug. 26, 2003
Mark W. Gluch, Grosse Ile, MI (US);
Joseph D. Miller, Farmington Hills, MI (US);
Mark W. Gluch, Grosse Ile, MI (US);
Joseph D. Miller, Farmington Hills, MI (US);
TRW Automotive U.S. LLC, Livonia, MI (US);
Abstract
An apparatus and method of controlling an electric motor () having a rotor () that is formed from a series of laminations () and has a plurality of rotor poles () and a stator () that encircles the rotor () and has a plurality of stator poles (), each with a respective stator winding (). A first sensor () senses actual inductance in the respective stator winding (). A second sensor () senses a position of the rotor () relative to the stator (). A controller () determines a reference inductance based on the rotor position signal, determines a difference between the actual inductance and the reference inductance, and prevents further energization of the stator windings () when the difference exceeds a predetermined amount.