Rogowski coil method of determination of bearing lubrication in dynamoelectric machines
US6300701A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Feb 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
It is possible to monitor the performance of a lubrication system performance of a Dynamoelectric Machine (DEM) by observing the electric current flowing in the DEM shaft. Suitable Rogowski coils are mounted around the shaft of the rotor of a DEM just inboard the bearings. The Rogowski coil may be mounted on the shaft to rotate with the shaft, or it may be mounted on said DEM so as to surround the shaft and remain stationary. Shaft current magnitudes may be established for start-up and steady state operating conditions. Any deviation from the steady state shaft current magnitude may be taken as a warning that the DEM bearing lubrication system is malfunctioning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.