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US 4,892,863 AGranted
Electric machinery employing a superconductor element
AssigneeEastman Kodak Company
InventorAshok K. Agarwala
Life of this patent
Estimating the term…
Abstract
An electric machine that includes a superconductor bearing to position and levitate a magnetic rotor. The machine also includes an armature circuit that is electro-magnetically coupled to the rotor, and an associated drive electronics. The machine can function as a generator, or a motor to drive a load, and has an advantage of frictionless operation.
Claims29
A machine comprising:
- (a) a superconductor bearing;
- (b) a magnetic rotor that can be positioned so that it can levitate and move with respect to the superconductor bearing and producing a first magnetic field;
- and
- (c) a stator comprising an armature winding that is connectible to a source/sink of electrical power to produce a second magnetic field between the stator and the rotor, the first and second magnetic fields capable of interacting so as to create an electromagnetic torque, so that
- when the machine is acting as a generator, the electromagnetic torque opposes rotation of the rotor, and
- when the machine is acting as a motor, the electromagnetic torque acts in the direction of rotation.
3 more elements
Dependencies are inferred from the claim text.