Method and apparatus for diagnosing local overheating in a rotary electric machine
US4364032A · kind A · utility
16Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1980 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Dec 4, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a gas cooled rotary electric machine using insulating coating material which is subjected to thermal-decomposition when the insulating coating material is exposed to high temperatures thereby generating submicron particles, the concentration in the cooling gas of submicron particles generated through thermal-decomposition of the insulating coating material and distributed in the cooling gas is detected and an alarm signal is issued when the time-integration of a signal representing the concentration of the submicron particles exceeds a predetermined reference integration value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.