New Investigations in Play Static Hysteresis Model for Increased Accuracy and Robustness

This article presents an evolution of the inverse Play model to reconstruct static hysteresis from a flux density waveform input. It is to be combined with dynamic and 2-D or 3-D models to estimate the complete iron loss in electrical machines. In the first part of the article, the article shows the significant improvement in the original inverse Play model accuracy obtained by modifying the characterization measurement methodology, the subsequent discretization, and the identification method. Thereafter, a new version of the Play model, named “continuous,” is introduced, which allowed a significant gain in performance at the expense of greater computation time for the identification process. Both model versions have been validated through experimental comparison. All measurements, characterization, and validation have been done according to IEC60404-2 on two different test laboratories. The studied material is non-oriented SiFe M400-50A electrical steel.