P58 - Eddy current loss measurement with a focus on measurement sensors for permanent magnets (PM) in energy-efficient electrical machines

Abstract

Permanent magnet synchronous machines (PMSMs) fed with frequency converter faces higher order harmonics signals which results higher eddy current losses in permanent magnets (PMs). This eddy current losses in the PMs leads to overheating causing irreversible demagnetization of PMs during the operation of the machines. One of the goals in machine design for the safe operation is to measure the total eddy current loss and minimize overheating of PMs. In this paper, measurement methods with a focus on measurement sensors and a finite element method (FEM) simulation for the eddy current loss (i.e. PM loss) of PMSMs are presented and compared.