Measurement of Vector Magnetic Property under Stress and Its Application for Electrical Machine Design

Abstract

　We have reported measured results of magnetic properties of a non-oriented electrical steel sheet under various magnetic flux and stress conditions. In this paper, the influence of the uniaxial and biaxial stress on the vector magnetic properties and magnetic power loss are examined in detail. As an application of electrical machine design, a permanent magnet motor is analyzed by using complex-approximated vector magnetic characteristic analysis and the measured database. As a result, the magnetic power loss of the stator core in the permanent magnet motor is decreased by applying an in-plane tensile stress.