Local Vector Magnetic Measurement in Iron Core of EI Type Reactor Under Out-of-Plane Stress

Abstract

　Magnetic property of an electromagnetic steel sheet which is used for an iron core of electrical machinery and apparatus changes due to the external stress. Although several researches under out-of-plane stress are reported, those all are investigations for a measurement sample. An investigation of magnetic property by applying stress to an iron core of electrical machinery and apparatus directly is very important for future electrical machinery and apparatus development. Additionally, magnetic flux density B and magnetic field intensity H are vector quantities and a spatial phase angle θ_BH is between those. The spatial phase angle θ_BH is an important factor to calculate iron loss. Therefore, in this paper, local vector magnetic measurement in iron core of EI type reactor under out-of-plane stress is reported. The iron core is non-oriented electrical steel sheet. As a result, it is clarified that iron loss decreases because the phase difference θ_BH decreases by applying of stress from out-of-plane.