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Axial flux machine, stator and fabrication method

United States Patent

March 16, 2004
View the Complete Patent at the US Patent & Trademark Office
An axial flux machine comprises: a soft magnetic composite stator extension positioned in parallel with a rotor disk and having slots; soft magnetic composite pole pieces attached to the stator extension and facing a permanent magnet on the rotor disk, each comprising a protrusion situated within a respective one of the slots, each protrusion shaped so as to facilitate orientation of the respective pole piece with respect to the stator extension; electrical coils, each wrapped around a respective one of the pole pieces. In another embodiment the soft magnetic composite pole pieces each comprise a base portion around with the electrical coils are wound and a trapezoidal shield portion a plurality of heights with a first height in a first region being longer than a second height in a second region, the second region being closer to a pole-to-pole gap than the first region.
Carl; Ralph James (Clifton Park, NY)
General Electric Company (Niskayuna, NY)
10/ 063,280
April 8, 2002
FEDERAL RESEARCH STATEMENT This invention was made with United States Government support under contract number DEFC260NT40993 awarded by the United States Department of Energy. The United States Government has certain rights in the invention