Abstract
Routine electromagnetic testing is used to detect developing faults in the stator cores of large electrical machines. However the non-linear permeability and hysteresis of electrical steel cause the development of harmonics in the magnetic field, potentially affecting fault interpretation. A method to determine the Rayleigh hysteresis from specification data is developed. Since the use of sinusoidal test flux is shown to prevent an analytic solution of the magnetic field, a numeric integration is required to compute the resultant harmonics. The impact of these on the electromagnetic test is analysed and shown to be minor depending on the class of instrument.
| Original language | English |
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| Title of host publication | PEMD 2014, The 7th IET international conference on Power Electronics, Machines and Drives |
| Place of Publication | London |
| Publisher | Institution of Engineering and Technology |
| Pages | 0052/1-0052/6 |
| Publication status | Published - 9 Apr 2014 |
| Event | PEMD 2014 - Power Electronics, Machines and Drives Conferebce - Manchester Duration: 8 Apr 2014 → 10 Apr 2014 |
Conference
| Conference | PEMD 2014 - Power Electronics, Machines and Drives Conferebce |
|---|---|
| City | Manchester |
| Period | 8/04/14 → 10/04/14 |
Keywords
- EL CID
- Electromagnetic stator test
- Stator core
- Condition monitoring
- Harmonics