Direct finite element analysis of flux and current distributions under specified conditions
Direct finite element analysis of flux and current distributions under specified conditions
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指定条件下磁通和电流分布的直接有限元分析
DOI：
10.1109/tmag.1982.1061870
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发表时间：
1982
影响因子：
2.1
通讯作者：
N. Takahashi
中科院分区：
文献类型：
--
作者：
T. Nakata;N. Takahashi
用传统的有限元方法分析磁路的磁通分布时，必须给定磁化电流。因此，在给定磁通分布的情况下，用传统的有限元方法很难得到产生给定场分布的磁动势分布或磁体结构。提出了“考虑外电源有限元法”和“形状修正有限元法”等新方法。这些方法的计算过程与传统方法相反。这些新方法具有以下优点：(a)当存在许多未知的独立磁化电流时，可以直接计算这些电流。(b)当给定磁通量分布时，可直接计算磁体的最佳形状。(c)由于这些新方法不需要重复，计算时间可以大大减少。介绍了这些新方法的原理和有限元公式，并给出了一些应用实例。这些新方法使用有限元法设计最优磁路成为可能。
When the flux distribution of a magnetic circuit is analyzed by using the conventional finite element method, the magnetizing currents must be given. Therefore, if the flux distribution is specified, it is difficult to obtain the distributions of magnetomotive forces or configuration of magnets producing the specified field distribution by the conventional finite element method. New methods which are called the "finite element method taking account of external power source" and the "finite element method with shape modification" have been developed. The processes of calculation in these methods are contrary to the conventional technique. These new methods have the following advantages: (a) If there are many unknown independent magnetizing currents, these currents are directly calculated by the new method. (b) When a flux distribution is specified, the optimum shapes of the magnets can be directly calculated. (c) As these new methods need no repetition, computing time can be considerably reduced. The principles and the finite element formulations of these new methods are described, and a few examples of application of these methods are shown. These new methods make it possible to design the optimum magnetic circuits by using the finite element method.