基于场分离技术与损耗统计理论的动态Energetic磁滞模型

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

建立准确且高效的动态Energetic磁滞模型对磁性元器件的优化设计具有重要意义。然而,现有动态Energetic模型物理意义并不明确,且有效性尚未得到实验验证。针对原始静态Energetic模型仅包含磁滞损耗,而无法考虑磁性材料在交流激励下的动态涡流及剩余损耗的问题,首先从能量平衡的角度出发,基于场分离技术与损耗分离的思想,推导了各损耗分量与其对应的磁场强度分量之间的等效关系;其次,利用损耗统计理论推导涡流与剩余损耗相应磁场强度分量的解析表达式,从而在此基础上运用场量叠加的方式,建立一种基于场分离技术与损耗统计理论的新型解析动态Energetic模型。仿真及实验结果表明,所提动态Energetic模型不仅物理意义清晰明确,同时具有较高的准确性与实用性。

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.