Ventilation system for dynamoelectric machines
US4028569A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1975 |
| Grant date | Jun 7, 1977 |
| Priority date | — |
| Expiry date | Jun 16, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ventilation system is provided for dynamoelectric machines such as hydro generators having salient pole rotors and in which the rotor and stator have separate ventilation systems sealed from the air gap. The stator ventilation system includes radial vent ducts in the stator core with longitudinal ducts extending between adjacent radial vent ducts in the tops of the winding slots. The longitudinal ducts are formed by two radially spaced wedges in each slot defining an axial passage between them, and the ducts are sealed from the air gap by the wedges and by sealing members at the inner ends of the radial ducts. Ventilating air flows radially inward through the vent ducts, longitudinally through the longitudinal ducts from one vent duct to the next, and radially outward to the external circuit where it is circulated through coolers by means of a blower or otherwise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.