Charles Proteus Steinmetz's first job after arriving in America was to investigate problems encountered in the design of the alternating current version of the brushed commutator motor. The situation was so bad that motors could not be designed ahead of the actual construction. The success or failure of a motor design was not known until after it was actually built at great expense and tested. He formlated the laws of magnetic hysteresis in finding a solution. Hysteresis is a...
AC Commutator Motors
AC Commutator Motors