DC-motor and fuel pump faults and brush-wear prognosis
US9097767B2 · kind B2 · utility
4Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2012 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Nov 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.