Abstract
As the rotational speed of a motor increases for miniaturization, its stator core must have low iron losses. A magnetic composite core motor is introduced as a solution for a high-efficiency high-speed motor that incorporates a magnetic composite material with low iron loss for its stator. This magnetic composite material is composed of magnetic powder and a resin binder, with its saturation magnetic flux density and permeability determined by the volume fill ratio of the magnetic powder. In this study, ways to enhance the maximum volume fill ratio of magnetic composite materials to boost their effectiveness as motor cores were explored. Results show that the saturation flux density of the magnetic composite material improved from 0.65 to 0.75 T and its relative permeability (at 1 kA/m) increased from 19 to 21. As a result, the application domain of magnetic composite materials has expanded.
