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Electromechanical flywheel

  • US 9,148,037 B2
  • Filed: 01/03/2012
  • Issued: 09/29/2015
  • Est. Priority Date: 11/13/2011
  • Status: Active Grant
First Claim
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1. An electromechanical flywheel comprising:

  • a core assembly including a motor-generator stator;

    a cylindrical motor-generator rotor surrounding the stator;

    the statordefining an axis of rotation,having a field coil that encircles the axis of rotation, andhaving an armature coil that does not encircle the axis of rotation;

    a flywheel mass for operation in a vacuum, the flywheel massencircling the motor-generator rotor andcoupled to the motor-generator rotor for rotation with the motor-generator rotor;

    an upstanding vacuum housing enclosing the motor-generator rotor and the flywheel mass;

    first and second spaced apart suspension assemblies;

    the first suspension assembly including a first electromagnetic bearing for applying centering and levitating forces to the motor-generator rotor;

    the second suspension assembly including a second electromagnetic bearing for applying centering forces to the motor-generator rotor;

    a cylindrical motor-generator rotor wall including plural stages with plural embedments in each stage and non-magnetic material abutting the embedments;

    the embedments are laminated magnetic path part assemblies arranged to create a lattice with spaces between the embedments, the spaces being filled with the non-magnetic material; and

    ,each embedment traverses a staggered magnetic path between adjacent rings of the stator.

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