Identification of Iron Powder B-H Characteristics Considering Impurities in the magnetic material

the iron powder magnetic material has widespread applications in engineering. So appropriate measuring characteristics of this material especially B-H curve is essential in the design procedure of the inductor used in power electronics. One of the standard frames for measuring the magnetic characteristics of the iron powder is the toroid core. The accuracy of measuring the magnetic characteristics of the toroid core is affected by various uncertainties. One of this uncertainties is the non-uniform distribution of magnetic field in the surface of the core. This issue in presence of impurity and non-uniform distribution in core compounds can leads to the error in measuring the hysteresis loop and core losses. In this paper first, the analytical design of the dimension of the toroid core based on IEC Standard 60404-6 has carried out then the Finite Element Method (FEM) and Simulink model are used to confirm the analytical design. Furthermore, the designed toroid frame is manufactured and the result compared to each other. Eventually, the issues of impurity and non-uniform magnetic field distribution on the toroid core are investigated.