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Electromagnetic-mechanical coupled model of tubular linear stepping motors

机译：管状线性步进电动机的电磁-机械耦合模型

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This paper aims to develop an electromagnetic-mechanical model to study the dynamic performances of tubular linear stepping motors. The studied tubular linear stepping motors are the classical Variable-Reluctance Linear Stepping Motor (VRLSM) and its hybrid version with incorporated permanent magnets on the stator, leading to the Permanent-Magnet Linear Stepping Motor (PMLSM). The governing magnetic field nonlinear equations expressed in terms of magnetic vector potential are solved using the nodal-based finite element method while incorporating the Newton-Raphson algorithm for the magnetic nonlinearity treatment. The sequential coupling between the electro-magnetic and mechanical equations is carried out, firstly through the magnetic force, and secondly by the modified flux distribution due to the moving parts displacement simulated by the macro-element method. The validity of the model is checked by comparing the computed and the measured displacement. Finally, the predicted dynamic performances of the PMLSM are compared to those obtained for the VRLSM.
机译：本文旨在建立一个电磁力学模型来研究管状线性步进电动机的动态性能。所研究的管状线性步进电动机是经典的可变磁阻线性步进电动机（VRLSM）及其在定子上装有永磁体的混合版本，从而导致了永磁线性步进电动机（PMLSM）。使用基于节点的有限元方法，同时结合牛顿-拉夫森算法进行磁非线性处理，求解了以磁矢量势表示的控制磁场非线性方程。电磁方程式和机械方程式之间的顺序耦合首先通过磁力进行，其次通过通过宏单元法模拟的运动部件位移产生的修正磁通量分布进行。通过比较计算的位移和测量的位移来检查模型的有效性。最后，将PMLSM的预测动态性能与VRLSM获得的动态性能进行比较。

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