In order to predict the performance of designed electric machines, and also based on which the high efficiency of the drive systems can be obtained, the accurate calculation of the iron loss is necessary. Taking modeling accuracy versus modeling complexity into account, this article proposes a general and accurate iron loss calculation method considering harmonics based on the loss surface (LS) hysteresis model and finite-element method (FEM). Compared with the previous triangular wave excitation, this article uses the data under sinusoidal wave excitation to establish the LS model, which is more convenient for engineering application. A specimen is tested for different flux densities with harmonics, the extensive results verify the modeling method. Due to a powerful hysteresis model, the iron loss calculation can be realized by the direct integration of hysteresis loops. A separated iron loss calculation package is developed, and it is combined with the commercial finite-element software to compute the iron loss distribution. The method that combines the LS model and FEM is proved feasible by comparing the calculated iron loss with the measured one for the Epstein frame.

中文翻译：

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基于损耗面滞后模型和有限元法的考虑谐波的通用准确铁损计算方法

为了预测设计电机的性能，并在此基础上获得驱动系统的高效率，铁损的准确计算是必要的。综合考虑建模精度和建模复杂度，本文基于损耗面（LS）磁滞模型和有限元法（FEM），提出了一种通用且准确的考虑谐波的铁损计算方法。与以往的三角波激励相比，本文利用正弦波激励下的数据建立LS模型，更便于工程应用。对具有谐波的不同通量密度的样品进行测试，广泛的结果验证了建模方法。由于强大的滞后模型，铁损计算可以通过磁滞回线的直接积分来实现。开发了单独的铁损计算包，并结合商业有限元软件计算铁损分布。通过将计算出的铁损与 Epstein 框架的实测铁损进行比较，证明了将 LS 模型和 FEM 相结合的方法是可行的。