Eddy-current brake

Details Eddy-current brake Eddy-current brake

1990-06-28

1991-10-08

Halvosa, George E. A.

Brakes

Internal-resistance motion retarder

Magnetic fluid or material

192 84R, 310105, 310216, 310218, F16F 1503, F16D 6300, H02K 4904

Patent

active

050545876

ABSTRACT:
The present invention provides an eddy-current brake comprising a rotator made of a ferromagnetic material and electromagnets arranged so that the rotator will intercept the magnetic flux, wherein a braking force is produced by the eddy current generated in the rotator. An Ni-Cu-Ni three-layer thin metallic cladding 30 is provided on the inner surface of the cylindrical peripheral wall portion 11 of the rotator 10, and the coils 45 of the electromanets 40 are enclosed by a magnetic pole case 46 made of a ferromagnetic material, thereby to enable development of a large braking torque. This device is suited for use as an auxiliary brake for vehicles.

REFERENCES:
patent: 503727 (1893-08-01), Richter et al.
patent: 912504 (1909-02-01), Steckel et al.
patent: 2263079 (1941-11-01), Flynn
patent: 2617053 (1952-11-01), Winther
patent: 2734600 (1956-02-01), Strickland, Jr.
patent: 2971105 (1961-02-01), Jaeschke
patent: 3365598 (1968-01-01), Jaeschke
patent: 4937483 (1990-06-01), Matsui et al.

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