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. 29, 2013
Filed:
Feb. 02, 2010
Mohammad N. Anwar, Van Buren Township, MI (US);
S. M. N. Hasan, Novi, MI (US);
Khwaja M. Rahman, Troy, MI (US);
Silva Hiti, Redondo Beach, CA (US);
Steven E. Schulz, Torrance, CA (US);
Sean E. Gleason, West Bloomfield, MI (US);
Mohammad N. Anwar, Van Buren Township, MI (US);
S. M. N. Hasan, Novi, MI (US);
Khwaja M. Rahman, Troy, MI (US);
Silva Hiti, Redondo Beach, CA (US);
Steven E. Schulz, Torrance, CA (US);
Sean E. Gleason, West Bloomfield, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method of detecting a phase winding fault in a multi-phase electric machine is executable via a motor controller, and includes measuring feedback signals of the machine, including each phase current, and generating reference phase voltages for each phase. The method includes calculating a predetermined voltage value using the feedback signals and reference phase voltages, and comparing the voltage value to a corresponding threshold to determine the fault. A control action is executed when the voltage value exceeds the corresponding threshold. The voltage value is one or more of: a ratio of a normalized negative sequence voltage to a modulation index, an RMS voltage for each phase, and total harmonic distortion of each phase current. An apparatus detects the fault, and includes a motor controller and an algorithm as set forth above. The apparatus may include a voltage inverter for generating a multi-phase alternating current output for powering the machine.