Homopolar disk type eddy current dynamometer

A disc type eddy current dynamometer (10) has a right circular rotor (11) and teeth (18a, 18b) formed in the stators (12a, 12b) such that a homopolar magnetic field within the 15a stators (12a, 12b) is formed into concentrated zones adjacent to the rotor surfaces (20a,20b). The heat produced by the generation of eddy currents in the rotor surfaces is carried away by a cooling liquid flowing from inlets (13a,13b) adjacent to the inner diameter of the rotor (11) to outlets (15a,15b) adjacent to the outer diameter of the rotor (11). The teeth may be integral with the frame and filled with resin, or, in order to plate this surface, the teeth and non-magnetic metal filler are fabricated separately as a disc which is then plated and installed.