Magnetic property measurement method using coaxial H coil

Abstract

　The development of highly efficient, high-output motors and transformers is promoted upon the improvement in the magnetic properties of magnetic materials. Moreover, in these devices, the use of thin electrical steel sheets and wire rods has been widely encouraged. However, strategies for the measurement of the magnetic properties of wire materials have not been successfully explored. To bridge this gap, in this study, we propose a coaxial H-coil method. In this paper, we fabricate two coaxial H coils with different structures and report a comparative evaluation of the coaxial H coil method and the standard measurement method, the excitation current method, on electromagnetic steel sheets.