2014 年 22 巻 3 号 p. 393-398
Experts now know that past iron loss measuring methods cannot quantitatively evaluate iron loss in an actual stator core with a complex shape. As such, we are researching a new method to measure the iron loss and magnetic properties of an actual stator core. We have already proposed a stator winding excitation method (SWEM), which can directly evaluate the iron loss of an actual stator core with a complex shape using a rotating machine to observe the magnetic flux which passes through each tooth. In this method, stator windings were used to generate the excitation magnetic flux in the stator core. In this study we will, report on the evaluation results of the magnetic properties for an actual stator core under conditions in which compressive stress is applied to a stator core. In order to reproduce stress in the manufacturing process, we used a two-axis external stress application device. We measured the magnetic properties in an actual stator core using the proposed method and device. Consequently, the magnetic properties of the actual stator core were affected in an obvious manner by the compressive stress.
