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.

Abstract: An eddy-current brake comprising a rotor or rotors made of a ferromagnetic material and electromagnets, in which the rotor is so disposed that it crosses the magnetic flux and a braking force is produced by the eddy current generated in the rotor. The rotor is provided with a metallic layer formed from a non-magnetic material having a greater electroconductivity than the rotor, and the coil of each electromagnet is enclosed by a magnetic pole case made of a ferromagnetic material, so that the device is capable of developing a large braking torque and suited for use as an auxiliary brake for vehicles.