A Study of Alternators with Superconducting Field Windings: II - Experiment

This paper describes a program to determine the operating characteristics of an experimental alternator using super-conducting field coils. The alternator itself consisted of a stationary superconducting 4-pole field winding made of 6800 turns of copper-plated Formvar-insulated Nb-25-percent Zr wire which had a critical current of 28 amperes. The field winding was inserted into a finger at the bottom of a typical laboratory-type helium test dewar.