Predictive sensitivity analysis of motor’s windings HF impedances

This paper describes a process in which high frequency (HF) differential-mode (DM) and common-mode (CM) impedances of a Permanent Magnet Synchronous Motor (PMSM) are predicted. These tools, using both 2D Finite Element Modeling (FEM) and Spice lumped parameter circuit, are then used to generate sensibilities analysis such as Sobol and Correlation indices with the help of surrogate models. This method gives a better understanding of design choices that can be made to impact impedances values at both low and high frequency for a same load working point. Obtained simulation results are compared to experimental ones using statistics, showing the interest of such an approach.