取向电工钢难磁化方向的确定及其与磁导率关系模型研究

Hard magnetization direction and its relation with permeability of conventional grain-oriented electrical steel

摘要:

取向电工钢在不同方向上的磁学性能各异，沿轧制方向不同角度制备标准的爱泼斯坦试样并对试样的磁学性能进行测量。结果表明，取向电工钢的难磁化方向与轧制方向约成60?左右。传统的椭圆模型在不同磁感应强度下描述磁学性能不精确，而新建立的抛物线及综合模型可以精确拟合磁导率与磁化角的关系。当H≥10000 A/m时，可以采用综合模型，当H＜10000 A/m时可以采用抛物线模型。两阶段模型大大提高电工钢在电磁工程领域计算的精确度，可以被应用于电磁计算中。

Abstract:

Magnetic properties of conventional grain-oriented electrical steel sheets are different in various directions, Epstein standard samples were cut with different angles to rolling direction and the corresponding magnetic properties of samples were tested. Experimental results shows that the hard magnetization direction is around 60°to the rolling direction. Conventional elliptical models are not accurate to simulate permeability at all magnetic intensities, and parabolic and hybrid models with high accuracy were proposed to simulate relations between permeability and magnetization direction. When magnetic intensity is no less than 10000 A/m, hybrid model could be used, and when magnetic intensity is less than 10000 A/m, parabolic model should be applied. Two-stage relation model of permeability and magnetization angles is significant in improving the accuracy of electromagnetic engineering calculations of electrical steel and could be applied in industrial applications.