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Cooling system for rotating machine

United States Patent

August 9, 2011
View the Complete Patent at the US Patent & Trademark Office
An electrical machine comprising a rotor is presented. The electrical machine includes the rotor disposed on a rotatable shaft and defining a plurality of radial protrusions extending from the shaft up to a periphery of the rotor. The radial protrusions having cavities define a fluid path. A stationary shaft is disposed concentrically within the rotatable shaft wherein an annular space is formed between the stationary and rotatable shaft. A plurality of magnetic segments is disposed on the radial protrusions and the fluid path from within the stationary shaft into the annular space and extending through the cavities within the radial protrusions.
Gerstler; William Dwight (Niskayuna, NY), El-Refaie; Ayman Mohamed Fawzi (Niskayuna, NY), Lokhandwalla; Murtuza (Clifton Park, NY), Alexander; James Pellegrino (Ballston Lake, NY), Quirion; Owen Scott (Clifton Park, NY), Palafox; Pepe (Schenectady, NY), Shen; Xiaochun (Schenectady, NY), Salasoo; Lembit (Schenectady, NY)
General Electric Company (Niskayuna, NY)
12/ 467,382
May 18, 2009
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH & DEVELOPMENT This invention was made with Government support under contract number DE-FC26-07NT43122 awarded by the Department of Energy. The Government has certain rights in the invention.