Patent ID: 7105975

Claim:
A dynamoelectric machine, comprising: (a) at least one stator assembly comprising a backiron section and a plurality of tooth sections, said stator assembly having a slot between each adjacent pair of said tooth sections and stator windings wound through said slots; (b) a frontiron section; and (c) at least one rotor assembly supported for rotation about an axis and including a plurality of poles, said rotor assembly being arranged and disposed for magnetic interaction with said at least one stator assembly; and wherein at least one of said backiron section, said plurality of tooth sections, and said frontiron section is composed of low core loss magnetic material characterized by a core loss less than “L” when operated at an excitation frequency “f” to a peak induction level “B max ” wherein L is given by the formula L=12·f·(B max ) 1.5 +30·f 2.3 ·(B max ) 2.3 , the core loss, excitation frequency and peak induction level being measured in watts per kilogram, kilohertz, and teslas, respectively.