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Electrical machines and assemblies including a yokeless stator with modular lamination stacks

United States Patent

7,692,357
April 6, 2010
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Commercialization and Technology Transfer Website
An electrical machine includes a rotor with an inner rotor portion and an outer rotor portion, and a double-sided yokeless stator. The yokeless stator includes modular lamination stacks and is configured for radial magnetic flux flow. The double-sided yokeless stator is concentrically disposed between the inner rotor portion and the outer rotor portion of the electrical machine. Examples of particularly useful embodiments for the electrical machine include wind turbine generators, ship propulsion motors, switch reluctance machines and double-sided synchronous machines.
Qu; Ronghai (Clifton Park, NY), Jansen; Patrick Lee (Scotia, NY), Bagepalli; Bharat Sampathkumar (Niskayuna, NY), Carl, Jr.; Ralph James (Clifton Park, NY), Gadre; Aniruddha Dattatraya (Rexford, NY), Lopez; Fulton Jose (Clifton Park, NY)
General Electric Company (Niskayuna, NY)
11/ 014,137
December 16, 2004
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH & DEVELOPMENT This invention was made with Government support under U.S. Department of Energy sub contract number ZAM-4-31235-05 under prime contract number DE-AC36-99GO10337. The Government has certain rights in the invention.