Electric machine with centrifugal impeller
US8063521B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2006 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Sep 21, 2026 |
Classification
- Technology area (CPC —)General
Abstract
An electrical machine having a centrifugal compressor for producing a fluid flow to cool one or more portions thereof. In one embodiment, the fluid is separated into separate flows, each of the flows flowing through only a portion of an annular gap formed between a rotor and stator of the electrical machine. According to some embodiments, the centrifugal compressor pushes a fluid through the electrical machine, whereas, in other embodiments, the centrifugal compressor pulls the fluid through the electrical machine. The centrifugal compressor includes an impeller that is attached to a shaft of the rotor. According to other embodiments, the electrical machine may include longitudinal channels formed between a housing of the electrical machine and the stator. A first flow of the fluid travels through the annular gap, and a second flow travels through the longitudinal channels. The electrical machine may also include a damper disposed in the longitudinal channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.