Hybrid Iron Loss Model for IPMSMs in Wide-Speed Range Applications

In this paper a novel hybrid mathematical model for the local iron loss power density calculation method of Interior Permanent Magnets Synchronous Machines (IPMSM) using Finite Element Analysis (FEA) is presented. The proposed model calculates hysteresis losses based on experimentally obtained static hysteresis loops of the ferromagnetic material. This mathematical model provides an alternative for the scarcity of experimental data by estimating hysteresis loops using the Preisach distribution model. The model incorporates waveforms of non-sinusoidal magnetic flux density for each and every finite element individually to precisely calculate eddy current losses. Therefore, its application is suitable for the estimation of local iron loss distribution and its detrimental thermal effects in the wide-speed range operation. The proposed model was verified on an IPMSM machine used for a case study, and it was compared with the conventional method based on Bertotti iron loss model.