【摘要】 机械应力会影响电机铁心材料的磁滞回环特性和磁致伸缩回环特性，进而影响电机损耗与振动等运行性能，为此需要在电工产品设计阶段有效模拟电工钢片磁滞-磁致伸缩应变-机械应力的耦合关系下的磁特性。基于磁畴能量极小值的原理，该文提出改进的磁畴结构模型（ADSM）实现电工钢片在机械应力下磁滞与磁致伸缩回环滞后特性表征。引入磁滞能量密度函数描述磁滞和磁致伸缩回环滞后效应，引入磁弹性能考虑机械应力对磁特性的影响，使用多个晶粒磁特性的平均值来表示多晶结构电工钢片的磁特性，最后通过模型结果与实验测量数据对比，验证了该改进的ADSM较传统模型更能有效地表征电工钢片的磁滞与磁致伸缩滞后特性，为准确计算铁心的损耗与振动性能奠定基础。更多还原

【Abstract】 Mechanical stress will affect the hysteresis loop characteristics and magnetostrictive loop characteristics of the motor core material, and then affect the motor loss and vibration performance. For this reason, it is necessary to effectively simulate the magnetic characteristics of electrical steel sheets under the coupling relationship of hysteresis-magnetostrictive strain-mechanical stress in the design phase of electrical products. Based on the principle of the minimum value of domain energy, this paper proposes an assembled domain structure model(ADSM) to realize the hysteresis and magnetostrictive loop hysteretic characteristics of electrical steel sheets under mechanical stress. The hysteresis energy density function is introduced to describe the hysteresis and magnetostrictive loop hysteretic effects, and the magnetoelastic energy is introduced to consider the influence of mechanical stress on the magnetic properties. The average value of the magnetic properties of multiple grains is used to represent the magnetic properties of polycrystalline electrical steel sheets. Finally, the model results are compared with the experimental measurement data, it is verified that the improved ADSM is more effective in characterizing the magnetic and magnetostrictive hysteretic characteristics of the electrical steel sheets than the traditional model,which lays the foundation for the accurate calculation of core loss and vibration performance.更多还原