An Inverse Problem Methodology to Analyze Demagnetization Phenomenon in Permanent Magnet Machines

Abstract

The paper presents a novel approach of analyzing demagnetization phenomenon in permanent magnet (PM) machines. Experimental measurements of electromotive force (EMF) results for example, have been used to calculate the magnet's remanent induction (Br) in its different regions. Resolution by Maxwell's equations and gradient based algorithm is applied to solve this inverse problem. The research is a continuation of the work presented [J. Farooq et al., 2006], where demagnetization modeling analysis is taken as a direct problem