Graded electric field insulation system for dynamoelectric machine
US6750400B2 · kind B2 · utility
4Cited by
22References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Feb 10, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K3/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A groundwall insulation system for use in dynamoelectric machines carrying voltage above 4 kV, and preferably in the order of 13.8 kV, or higher has two layers of insulation wound onto the conductors of the high voltage winding. The first layer of insulation has a first permittivity that is greater then the permittivity of the second layer of insulation wound onto the first layer of insulation. As a consequence, at the juncture between the first and second layers there is a sharp increase in the electric field profile as seen through the groundwall insulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.