Development of the apparatus for measuring magnetic properties of electrical steel sheets in arbitrary directions under compressive stress normal to their surface

摘要: In designing motors, one must grasp the magnetic properties of electrical steel sheets considering actual conditions in motors. Especially important is grasping stress dependence power loss. This paper describes a newly developed apparatus to measure two-dimensional (2-D) (properties under arbitrary alternating and rotating flux conditions) compressive normal sheet surface. The has 2-D excitation circuit generate fields directions evaluation area. It also pressing unit apply During measurement, it uniform throughout Therefore, we have new density sensor using needle probe method. composed thin copper foils sputtered on sheets. By this sensor, can be applied surface specimen without influence sensor. described details with measurement results iron loss by are shown.In infl...