Certain approaches to electromagnetic field problems pertaining to dynamo-electric machines

摘要

Current-carrying circuits in electrical rotating machines give rise to electromagnetic fields which are modified by surface polarities induced in adjacent ferromagnetic media and by eddy currents induced in neighbouring conducting media. The paper reviews certain approaches towards solving some of the electromagnetic problems involved and introduces a method for taking account of the reaction of eddy currents induced in a ferromagnetic medium on their inducing field.