Abstract
The paper introduces a dynamic finite element model for calculating iron loss in ferromagnetic laminations under PWM excitation. The proposed methodology accounts for static hysteresis, classical eddy currents and anomalous losses and has been applied to predict hysteresis loops in Epstein device in three different cases of PWM voltage waveform types: unipolar, bipolar and square wave. The model is tuned by using standard static iron lamination characteristics provided by constructors and offers sufficient accuracy in all the aforementioned cases.
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