中文摘要：

考虑到磁性材料的非线性特点，在计算磁路时往往比较复杂。目前求解磁路的主要方法有：解析法、图解法、数值计算法。针对永磁机构设计中提出的问题，建立了分段法分析铁心磁路的模型，结合Office Excel中的曲线拟合功能，利用图示法快速直观的求解磁路。得出了永磁机构铁心各部分的尺寸和磁场状态，为永磁机构磁路设计提供了依据。实验结果表明，利用此种方法不仅简化了求解过程，大大的加快了求解速度，而且可以直观的反应求解过程，便于进一步分析和优化磁路。

英文摘要：

Analysing magnetic circuit is always very complex for the nonlinear feature of magnetic material. The existing methods for megnetic circuit analysis include analytic method, graphic method, and numerical method, etc. In this paper, a fractionation method model is established for megnetic circuit analysis, and a graphic method with the function of curve fitting tool in Excel is adopted to calculate the magnetic circuit. The sizes and magnetic fields of different parts of iron core are hence achieved, providing a basis for magnetic circuit design of permanent magnetic actuator. The experimental results show that the present method can simplify and accderate the calculation, and visualize the solving process to facilitate further analyzing and optimizing of magnetic circuit.