Abstract
A new homopolar motor has been designed and constructed based on the principle of the Faraday disk. The magnetic circuit consists of two halves made from Armco iron. The rotor disk is made from a low carbon steel plate. Current is fed to the disk radially through 8 brushes of copper graphite, while 8 other brushes on both sides of the shaft form the output terminal. With 2 volts input voltage and 100 amperes input current, the motor delivers approximately 1/6 h.p. at 5800 rpm. with 50 per cent efficiency. Performance curves and a transient response oscillogram are presented.
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