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Reluctance apparatus for flywheel energy storage

United States Patent

August 1, 2000
View the Complete Patent at the US Patent & Trademark Office
Argonne National Laboratory - Visit the Technology Development and Commercialization Website
A motor generator for providing high efficiency, controlled voltage output or storage of energy in a flywheel system. A motor generator includes a stator of a soft ferromagnetic material, a motor coil and a generator coil, and a rotor has at least one embedded soft ferromagnetic piece. Control of voltage output is achieved by use of multiple stator pieces and multiple rotors with controllable gaps between the stator pieces and the soft ferromagnetic piece.
Hull; John R. (Downers Grove, IL)
University of Chicago (Chicago, IL)
09/ 183,141
October 30, 1998
This invention was made with Government support under Contract No. W31-109-ENG-38 awarded by the Department of Energy. The Government has certain rights in this invention.