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Fast prediction of unbalanced magnetic pull in PM machines
Electrical Engineering ( IF 1.8 ) Pub Date : 2021-03-10 , DOI: 10.1007/s00202-021-01253-1
Seyed Payam Emami , Samad Taghipour Boroujeni , Noureddine Takorabet

In this work, a model is proposed for the computation of unbalanced magnetic pull (UMP) in PM machines. This model is suitable for use in dynamic simulations. However, the aim of this research is not dynamic modeling of the PM machines. The main idea is to provide a fast model to be integrated into the dynamic models of PM machines. To reduce the required computational burden, the UMP of PM machines is expressed as a second-order algebraic vector function of the stator currents. The function parameters are estimated by post-processing of the results of some magneto-static simulations. These parameters are functions of the machine geometrical data and the rotor position. The role of these parameters in the computation of the machine UMP is the same as the role of the machine inductances in computation of the electromagnetic torque. To investigate the capability of the developed model, the UMP of a concentric fractional-slot surface PM machine with diametrically asymmetric stator windings and the UMP of an eccentric PM-inset machine are predicted. The obtained results are compared in terms of the consumed time and the accuracy by means of finite element analysis.



中文翻译:

快速预测永磁电机中的不平衡磁拉

在这项工作中,提出了一个用于计算PM机器中不平衡磁拉(UMP)的模型。该模型适用于动态仿真。但是,这项研究的目的不是对PM机器进行动态建模。主要思想是提供一种快速模型,以将其集成到PM机器的动态模型中。为了减少所需的计算负担,将永磁电机的UMP表示为定子电流的二阶代数矢量函数。通过对某些静磁仿真的结果进行后处理来估计功能参数。这些参数是电机几何数据和转子位置的函数。这些参数在电机UMP的计算中的作用与电机电感在电磁转矩的计算中的作用相同。为了研究所开发模型的能力,预测了具有径向非对称定子绕组的同心分数槽表面永磁电机的UMP和偏心PM插入电机的UMP。通过有限元分析,比较所获得的结果在消耗的时间和准确性上。

更新日期:2021-03-10
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