中文摘要：

含有AlNiCo、FeCrCo等非线性永磁体的电磁机构，在参数设计过程中需要进行上千次的电磁吸力计算，若使用有限元等数值方法，将消耗大量计算时间，而传统等效磁路法的计算精度有限。为了解决这一问题，提出了一种永磁体分布参数模型（distributedparametercalculationmodel，DPM），推导其完整的数学模型及校验条件；以某牌号开路状态下条形非线性永磁单体为例，使用基于磁力线划分的建模方法，求解各分段的起始工作点及截面磁通，并对比有限元方法和实验测试数据，验证了该分布参数模型在永磁单体计算中的正确性。对比有限元法与实测结果可知，该模型具有计算速度快、计算精度较高的特点。

英文摘要：

The parameter design of electromagnetic devices which contain nonlinear permanent magnet （NPM） like AlNiCo and FeCrCo, often needs the calculation on magnetic force of thousands of times. It will cost a lot of time when using the finite element method （FEM）. And the accuracy is limited when the magnetic equivalent circuit method （MEC） is used. In order to solve the problem, a distributed parameter calculation model （DPM） of NPM bars was established in this paper, and the solution procedure as well as the verification condition of this model was given. By a case study of the single NPM bar, the method of magnetic field lines division was adopted to build the permanent magnet DPM, solve the starting point and section magnetic flux of each subsection, make a comparison between FEM and test data, and verify the accuracy of this magnetic field line based the distributed parameter model in NPM bar calculation. This model proves to be of acceptable calculation accuracy and high calculation speed.