Magnetic Performance Dependence by Grain Sizes for SMC Materials

The research being carried out nowadays on soft magnetic materials focuses on increasing the total efficiency of electromagnetic devices reducing the total losses. In this context, new magnetic materials are becoming increasingly important and could replace the traditional ones in many applications. In the field of electrical machines and filter inductances, the laminated sheets could be replaced, for some applications, with more energy-efficient materials. New compacted magnetic cores have been implemented adopting Soft Magnetic Composite (SMC) materials. Many advantages are obtained by the use of such materials: lower eddy currents and total iron losses at medium frequencies and the possibility to produce magnetic cores in very complex geometries. In this work innovative SMCs are implemented using organic layers to insulate and keep together the grains; the effect of the particle sizes on magnetic properties has been examined: specimens with small, medium and big granulometry have been made and fully characterised.