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. 04, 2015
Filed:
Jan. 09, 2012
Mark N. Howell, Rochester Hills, MI (US);
Pattada A. Kallappa, Karnataka, IN;
Avoki Omekanda, Rochester Hills, MI (US);
Mark N. Howell, Rochester Hills, MI (US);
Pattada A. Kallappa, Karnataka, IN;
Avoki Omekanda, Rochester Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system and method for determining the health of a DC motor, such as a DC motor on a vehicle. The method includes measuring a current output signal of the DC motor, determining a mean of the measured current signal over a predetermined time period and determining a variance estimation of the mean of the measured current. The method then uses the variance estimation to determine the health of the motor, including an end-of-life prediction of the motor, and uses the mean of the measured current to determine the performance (torque) of the motor.