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Nonlinear Convergence Acceleration of Magnetic Field Computation

机译:磁场计算的非线性收敛加速

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摘要

Finite-element method (FEM) has been widely used to analyze the performance of electric devices. Due to the nonlinear permeability of iron materials, Newton–Raphson method is usually used in FEM for nonlinear iteration. To accelerate the nonlinear convergence, one effective technique is proposed. The method is to use different relaxation factors for materials in the electric device. The difference between this proposed method and conventional method is that in conventional method only one relaxation factor is used for all solutions. With the proposed method the total computing time of iteration process of FEM can be reduced effectively. The proposed algorithm is tested on a highly saturated transformer to showcase its effectiveness.
机译:有限元方法(FEM)已被广泛用于分析电子设备的性能。由于铁材料的非线性渗透性,牛顿-拉夫森法通常用于有限元法中进行非线性迭代。为了加速非线性收敛,提出了一种有效的技术。该方法是对电子设备中的材料使用不同的松弛因子。该提出的方法与常规方法之间的区别在于,在常规方法中,所有解决方案仅使用一个松弛因子。利用该方法可以有效地减少有限元迭代过程的总计算时间。该算法在高饱和变压器上进行了测试,以证明其有效性。

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