Method and apparatus for determining faults in an electric assist steering system
US7483796B2 · kind B2 · utility
7Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2004 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Dec 8, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining a fault in an electric motor (50) determines a calculated star voltage (Vstarcalc) of the electric motor. The calculated star voltage (Vstarcalc) is compared to a measured star voltage (Vstarmeas) of the electric motor (50) to determine a star voltage error (Vstarerr). The fault in the electric motor (50) is determined when the star voltage error (Vstarerr) exceeds a predetermined maximum star voltage error (Vstarerrmax).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.