A Dynamic Energetic Hysteresis Model Based on the Field Separation Approach and Statistical Theory of Losses

Establishing an accurate and efficient dynamic energetic hysteresis model is of great significance to the optimal design of magnetic components. However, the physical meaning of the existing dynamic energetic model is not clear, and its validity has not been verified by experiments. Aiming at the problem that the original static energetic model only contains hysteresis losses and cannot consider the dynamic eddy current and excess losses of magnetic materials under AC excitation, this paper firstly deduced the relationship between the loss components and their corresponding magnetic field strength components from the point of view of energy balance using the field separation technique and the loss separation method. Secondly, the analytical expression of the magnetic field intensity components corresponding to eddy current and residual losses were derived by using the statistics theory of losses (STL), and a novel dynamic energetic model based on field separation approach and STL was established by using the field superposition method. The simulation and experimental results show that the proposed dynamic energetic model not only contains clear physical meaning, but also has high accuracy and practicability. © 2019 Chin. Soc. for Elec. Eng.