Method and apparatus for diagnosing overheating of an electric machine
US4373376A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1980 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Sep 17, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for diagnosing an overheating of a gas-cooled type electric machine having at least some components coated with an organic insulating material which decomposes into, for example, particles when subjected to high temperatures. The apparatus includes an extracting arrangement for enabling an extraction of gas from any region in an interior space of the electric machine. A device is provided for detecting a density of the particles contained in the gas and an arrangement is provided for analyzing a composition of the decomposed organic insulating material in the coolant gas so that, at first, an overheat region may be found and, secondly, an overheat position in the overheat region can be determined on the basis of the organic composition of the decomposed organic insulating material contained in the coolant gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.