COMPARISON OF DIFFERENT METHODS FOR CALCULATING THE AIR-GAP FIELD OF INDUCTION-MOTORS

In this paper different methods for calculating the air-gap field of i nduction motors are compared. A ''modified one-dimensional field calcu lation'' is proposed, combining the advantages of short computing time s and high accuracy of the one- and two-dimensional field calculation, respectively. The different methods are checked against experiments: The total leakage coefficient and the radiated audible noise of induct ion motors are investigated. Both, the modified one-dimensional and th e two-dimensional theory give results which are in good agreement to t he measurements.