Alternating and Rotating Core Loss Characteristics in Three-phase Induction Motor Model Core under High-frequency Excitation Conditions

Abstract

　In recent years, induction machine motors are operating at high speed rotation. However, an increase in iron loss occurring in the core of the induction motor when the frequency is increased poses a problem. In addition, alternating magnetic flux and rotating magnetic flux are mixed in the iron core, and this inner rotating magnetic flux leads to an increase factor of core loss. Therefore, it is important to clarify the magnetic characteristics in the motor core and to clarify the factor of the increase in core loss. In this paper we report the alternating and rotating core loss characteristics of a three-phase induction motor model iron core under high frequency excitation.