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.
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2022, Vol. 37 
