Flux distortion and iron losses in flux-weakened permanent magnet synchronous motor

Abstract The iron losses were determined by using modelled properties of used electrical steel and calculated flux distribution in the core of the four-pole permanent magnet synchronous motor, working in the flux-weakening regime. The distribution of the magnetic induction B (t) in all parts of the motor was obtained by the numerical simulation of magnetic conditions using static 2D finite element software for a complete cycle of field variation. The results of iron loss determination were compared with the results obtained from experiments on the actual machine.