Apparatus and method for detection of residual magnetic fields in dynamoelectric machines
US6051987A · kind A · utility
5Cited by
10References
19Claims
0Family size
Inventor
Key dates
| Filing date | Apr 18, 1997 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Apr 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method to determine the intensity of a residual magnetic field that accumulates on the rotor of a dynamoelectric machine to identify stator and rotor anomalies. A dynamoelectric machine, such as an induction motor, has a rotor which becomes magnetized with use. This magnetism tends to skew inductance tests which are used to predict problems developing within the motor. The apparatus and method measure the accumulated magnetic field of a motor rotor, and adjust conventional inductance tests to yield more accurate results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.