Non-circular field winding enclosure
US6239527A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2000 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Jan 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K19/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An enclosure formed of a non-magnetic material occupies space in the non-magnetic gap between the rotor and stator. As the enclosure thickness increases, the size of the air gap, which is the non-magnetic gap minus the enclosure thickness, becomes smaller, and the resistance to the axial flow of gas coolant decreases. A non-circular shaped enclosure provides additional area between the rotor and stator for axial transfer of gas and minimizes the non-magnetic gap at the d-axis while maximizing the air gap at the q-axis. The shape of the enclosure also reduces the centrifugal force in the vicinity of the q-axis and delivers a more circular shape as a result of the deformation at operating speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.