Flywheel energy accumulator

Details Flywheel energy accumulator Flywheel energy accumulator

1998-08-10

2000-03-28

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 905, 310178, 74572, H02K 702, F16C 3204

Patent

active

060435771

ABSTRACT:
In a flywheel energy accumulator comprising a vertical shaft rotatably supported in a vacuum housing by superconduct ive magnetic axial support bearings, lower and upper flywheels are mounted on the shaft in axially spaced relationship, a homopolar dynamic machine with a rotating magnetic field is disposed in the space between the flywheels and includes a stator supported in, or forming part of, the housing and a rotor mounted on the shaft so as to be disposed within the rotor, and the superconductive magnetic supporet bearings include a lower passive axial thrust bearing with an annular magnet disposed below the lower flywheel and an upper positive axial pull bearing with an annular magnet disposed above the upper flywheel and disc-shaped superconductors disposed adjacent the annular magnets such that both bearings provide magnetic forces jointly counteracting the gravity forces of the shaft, the rotor and the flywheels.

REFERENCES:
patent: 4385251 (1983-05-01), Mallick et al.
patent: 5214981 (1993-06-01), Weinberger et al.
patent: 5270601 (1993-12-01), Rigney, II
patent: 5495221 (1996-02-01), Post
patent: 5747426 (1998-05-01), Abboud
patent: 5801469 (1998-09-01), Takahata et al.
Bornemann et al., "Schwungradenergiespeicher Mit Passiven Supraleitenden Magnetischen Lagern", KFK-Nachricthen 26, Mar. 1994, pp. 209-214.
H.J. Bornemann et al., "Low Friction in a Flywheel System with Passive Superconducting Magnetic Bearings", Applied Superconductivity, vol. 2, Nr. 7/08, Jul. 1, 1994.
Tixador et al., "Hybrid Superconducting Magnetic Suspensions", IEEE Transactions on Magnetics, vol. 32, nr. 4, Jul. 1996, pp. 2578-2581.

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