A method for BH curve identification of the magnetic core of synchronous reluctance machines is presented. It starts from the knowledge of machine torque or phase voltages measured at normal operation with ac balanced currents or obtained from dedicated experiments proposed for the BH curve identification. The identification is formulated as an inverse optimization problem where the experimental data based on appropriate experiments serve as the inputs and the BH curve parameters represented with a closed-form expression as the optimization variables. The influence of the different types of measurements on the identified parameters and the optimization process is discussed and compared. Moreover, the impact of geometrical uncertainties due to manufacturing tolerances is investigated and addressed. Virtual measurements obtained from finite-element simulations are used for the study. It is shown that the proposed method can identify the BH curve of the machine core with good accuracy.

中文翻译：

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一种同步磁阻电机磁芯BH曲线辨识方法

提出了一种同步磁阻电机磁芯BH曲线辨识方法。它从使用交流平衡电流正常运行时测量的机器转矩或相电压的知识开始，或者从为 BH 曲线识别提出的专用实验中获得。识别被表述为逆优化问题，其中基于适当实验的实验数据作为输入，以封闭形式表达式表示的 BH 曲线参数作为优化变量。讨论和比较了不同类型的测量对识别参数和优化过程的影响。此外，还研究并解决了由于制造公差引起的几何不确定性的影响。从有限元模拟中获得的虚拟测量用于研究。结果表明，所提出的方法能够准确地识别出机芯的BH曲线。