Electromechanical flywheel
First Claim
Patent Images
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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Abstract
An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationery inner stator having stator windings.
48 Citations
13 Claims
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1. An electromechanical flywheel comprising:
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a core assembly including a motor-generator stator; a cylindrical motor-generator rotor surrounding the stator; the stator defining an axis of rotation, having a field coil that encircles the axis of rotation, and having an armature coil that does not encircle the axis of rotation; a flywheel mass for operation in a vacuum, the flywheel mass encircling the motor-generator rotor and coupled 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. - View Dependent Claims (2)
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3. An electromechanical flywheel comprising:
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a core assembly including a motor-generator stator; a cylindrical motor-generator rotor surrounding the stator; the stator defining an axis of rotation, having a field coil that encircles the axis of rotation, and having an armature coil that does not encircle the axis of rotation; a flywheel mass for operation in a vacuum, the flywheel mass encircling the motor-generator rotor and coupled 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 hub in the form of a conical transition piece coupled to the flywheel mass and a support pin; the support pin having upper and lower ends, the upper end proximate the core assembly and the lower end proximate the first electromagnetic bearing; the support pin ends are not contacted during a normal operation; the support pin ends are contacted during a shutdown operation; and
,the support pin supports the hub when the support pin ends engage respective mechanical bearings. - View Dependent Claims (4, 5, 6, 7)
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8. An electromechanical flywheel comprising:
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an upstanding vacuum housing; a core assembly and a shaft-less rotating assembly for rotating in a vacuum of the vacuum housing; the rotating assembly including a cylindrical motor-generator rotor and a cylindrical flywheel mass for rotation with the motor-generator rotor; the core assembly including a motor-generator stator that defines a motor-generator rotor rotation axis; the stator having a field coil that encircles the motor-generator rotor rotation axis and an armature coil that does not encircle the motor-generator rotor rotation axis; the motor-generator rotor interposed between the stator and the flywheel mass; a motor-generator rotor hub and a support pin located between a free end of the core assembly and the housing; the core assembly supported by a single support in the form of a stator support located above the hub, arranged coaxially with the motor-generator rotor rotation axis, and extending from a top of the housing; an electromagnetic bearing for providing motor-generator rotor levitating forces; and
,the motor-generator rotor support pin for supporting the motor-generator rotor when the motor-generator rotor is not levitated. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification