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Simulation and statistical approaches on electrical steel’s magnetic behaviour under unidirectional single sheet tester

机译:单向单板测试仪对电工钢磁性能的模拟和统计方法

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摘要

Evaluation of magnetic properties of electrical steel is vital in improving the quality of electrical machinery since it is used as magnetic cores for transformers, motors and generators. A double yoke single sheet tester (SST) was modeled using two identical C-cores wound with copper wires at limb side in horizontal arrangement. The magnetic properties for electrical steels, grade M4 and M19 were tested under a frequency of 50 Hz with the current ranging from 0.2 to 2.4A. The effects of the sample dimension and anisotropy on magnetic measurements were investigated. Evaluation on specimen dimensions indicate that the non-uniformity of sample magnetization in overhang sample can attribute to the flux leakage between the yoke legs. The stray flux is also increased with the overhang sample. However, the so-called fit-in sample which is fitted nicely between the yoke end poles can minimize the effect of stray flux. One way ANOVA and T-test were used as statistical methods and executed at the 5% significance level. It is statistically proven that the magnetic properties of both magnetic materials are influenced by their anisotropy.
机译:电工钢的磁性能评估对于提高电机质量至关重要,因为它被用作变压器,电动机和发电机的磁芯。使用两个相同的C芯在水平方向上肢体侧缠绕铜线来模拟双轭单片测试仪(SST)。在频率为50 Hz且电流范围为0.2至2.4A的情况下测试了M4和M19级电工钢的磁性能。研究了样品尺寸和各向异性对磁测量的影响。对样品尺寸的评估表明,悬垂样品中样品磁化强度的不均匀可归因于磁轭腿之间的磁通泄漏。悬突样品也会增加杂散通量。但是,可以很好地安装在轭架端部磁极之间的所谓的可插入样品可以最大程度地减少杂散磁通的影响。一种方法是将ANOVA和T检验用作统计方法,并以5%的显着性水平执行。统计证明,两种磁性材料的磁性能均受其各向异性的影响。

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