Physics-Based Modeling of Power Converter Drive System for Evaluation of Electromagnetic Compatibility

摘要

In this paper, detailed physics-based modeling of a power converter drive is proposed. The 3D finite element (FE) modeling of a power inverter was developed and analyzed. An approach in physical modeling of the switching activity of the inverter in FE is proposed. In addition, the solver was modified and implemented for analyzing nonlinear materials in time-harmonic cases to achieve faster computation. The frequency response analysis was also implemented in simulation and measurements at various locations from the source. The numerical simulation provided the exact field solution at any given distance and defined the correlation between the electromagnetic fields generated by each of these components. The importance of this work is to facilitate the ability to evaluate the stray electromagnetic field levels used for evaluating EMC compliance at the design stage. In addition, the recognition of a failure condition inside each component of the system by observing the fields is another important contribution of this work. The optimum operation of the system components for lower EMI and optimum design of related shielding for EMC evaluation studies are added benefit of this work.