Detection of a missing stator slot wedge in an electrical machine
US8847620B2 · kind B2 · utility
1Cited by
3References
15Claims
0Family size
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Key dates
| Filing date | Apr 5, 2013 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Apr 5, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A missing stator slot wedge in an electrical machine can be detected by analyzing a current spectrum of the machine in a high frequency area. A current spectrum is provided from a current measurement, and values of the current spectrum in the high frequency area used to determine whether a stator slot wedge is missing or not. The conclusion can be based on values of a relative current amplitude IdB or on presence of certain harmonics in the high frequency area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.