Analysis and identification of influential phenomena on iron losses in embedded permanent magnet synchronous machine

Abstract

This paper presents magnetic flux density behaviour in laminated electrical sheets which affects the results and precision of iron losses calculation in imbedded permanent magnet (IPM) machine. Objective of the research was to analyse all the influential phenomena that were identified through iron loss models analysis, finite element method simulations and iron loss measurements. The presence of phenomena such as harmonic content and rotational magnetic fields are confirmed with finite element method analysis of concentrated and distributed winding IPM machine. A significant magnetic flux density ripple in the rotor of concentrated winding IPM machine in comparison to distributed winding IPM machine is revealed and analysed. Behaviour that affects iron loss in the rotor of synchronous machines in the absence of first order harmonic is analysed. The DC level added to alternating magnetic flux density was used in experiment to mimic magnetic behaviour on the rotor of IPM machine and further to calculate iron losses.

Iron loss analysis and calculation of high energy density permanent magnet machine

“…Nicolas Denis studied a stator core made of nanocrystalline magnetic material, reducing core loss by 64 to 75% [10]. Mitja Breznik present that magnetic flux density behaviour in laminated electrical sheets which affects the results and precision of iron losses calculation of permanent magnet machine [11]. Qi Li present an analytical calculation method of iron loss for integral-slot interior permanent magnet synchronous machine by iron loss resistance, considering harmonic effect during flux weakening [12].…”