Evaluation of Iron Loss Distribution of Laminated Stator Core by Interlocking by means of Heat Measurement Method

Abstract

　Purpose of this study is to clarify iron loss distribution on laminated stator core by an interlocking by means of a heat-measurement method with a thermography camera. This method has been applied to the surface mounted permanent magnet (PM) motors, which are removed stator windings, to measure temperature distributions on the stator surface during the PM rotor is rotating. Because the stator cores have no the interlocking, the previous study could not evaluate the influences of interlocking on the iron loss distribution of the stator core. The core loss of the stator core increases due to the interlocking laminations. To design a stator core having low iron loss for a high efficiency motor, the causes of increasing core losses including the interlocking lamination should be analyzed in detail. In this paper, how to evaluate iron loss distribution on stator core by interlocking by means of a heat-measurement method and the evaluated results are reported.