Fast and Accurate Modelling of Laminated Cores in Electrical Machines using Homogenization and Neural Networks

Eddy currents induced in the individual laminations of ferromagnetic laminated cores are usually disregarded in conventional electrical machine simulations, and magnetic losses are then only evaluated a posteriori, by means of Steinmetz-like formulas. This approach yields however seriously inaccurate computed fields and losses whenever the operating frequency increases, or in the presence of higher harmonics, which is an issue of growing importance in industrial R&D. In this contribution we introduce a significantly improved and effective approach based on homogenization and neural networks. The method can be easily implemented in standard finite element packages.