Influence of the magnet shape on the rotor eddy-current losses in the outer rotor permanent magnet synchronous motor

Abstract

This paper is focused on the comparison of the permanent magnet’s shape and magnetization direction influence on the rotor eddy-current losses in the 3 kW 30 000 rpm high-speed outer rotor permanent magnet synchronous motor. The analysis uses the results of the finite element simulations. The harmonic analysis of the air-gap flux density was done to better understand the difference between the studied magnet shapes.