IRON LOSS EVALUATION FOR A SMALL HIGH-EFFICIENCY MOTOR STATOR CORE MADE OF AN ULTRATHIN ELECTRICAL STEEL SHEET UNDER PWM INVERTER EXCITATION USING THE STATOR WINDING EXCITATION METHOD

Abstract

To develop a small high-efficiency motor for an aerospace machine, we developed a new stator core made of a 0.08-mm-thick ultrathin electrical steel sheet. The B-H curves and iron loss of the stator core were measured using the stator windings excitation method that we proposed. Experiments shows that when the excitation frequency was 2000Hz, the iron loss of the stator core was very low, and the eddy-current loss was especially low. Additionally, we measured the iron loss under pulse width modulation (PWM) excitation in the stator core. The stator core made of a 0.08mm-thick ultrathin electrical steel sheet for a small high-efficiency motor was deemed suitable for an aerospace machine.