The Method of Reducing the Eddy Loss―Magnetic Steel Section

Abstract

The electromagnetic performances of PMSMs are better than the electrical excitation synchronous motors’, but the eddy loss of iron core can’t be ignored in high-speed and large power condition. When the widths of magnetic steels are not approximated to the 2.3 times the penetration depth, the eddy loss can be reduced effectively. In this paper, two different motor models, a integer-slot winding model and a fractional-slot winding model, were studied, we found out the relationships between the width of magnetic steel and eddy loss, and verified the effectiveness of the above view through the simulation in JMAG software.