Detecting local overheating in liquid-cooled windings of electric machines
US4808867A · kind A · utility
3Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Jan 8, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for determining overheating in liquid-cooled windings of electric machines includes acoustically monitoring cooling liquid with at least one sound pickup, and detecting noises generated by bubbles in the event of local overheating if the boiling point of the cooling liquid is exceeded. An apparatus is also provided for carrying out the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.