Title:
METHOD AND APPARATUS FOR DETERMINING MOTOR FAULTS IN AN ELECTRIC ASSIST STEERING SYSTEM
Document Type and Number:
WIPO Patent Application WO2003084797
Kind Code:
A3
Abstract:
A method and apparatus for determining a motor fault in an electric motor (50) determines a calculated rotor position (thetacalc) of the electric motor. The calculated rotor position (thetacalc) is compared to a measured rotor position (thetameas) of the electric motor (50) to determine a rotor position error (thetaerr). A motor fault in the electric motor (50) is determined when the rotor position error (thetaerr) exceeds a predetermined maximum rotor position error (thetaerr-max).
Inventors:
SARDAR HEMANT M
FARDOUN ABBAS A
FARDOUN ABBAS A
Application Number:
PCT/US2003/010021
Publication Date:
December 24, 2003
Filing Date:
April 02, 2003
Export Citation:
Assignee:
TRW AUTOMOTIVE US LLC (US)
International Classes:
B62D5/04; (IPC1-7): G05B11/01
Foreign References:
| US6014598A | 2000-01-11 | |||
| US4843291A | 1989-06-27 | |||
| US5210476A | 1993-05-11 | |||
| US6236197B1 | 2001-05-22 | |||
| US5780983A | 1998-07-14 |
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