机铁耗磁体斜边永磁电的解析计算

在Slemon和Xian Liu表面置磁型永磁电机改进铁耗算法的基础上，分别推导了考虑磁体边缘斜角时定子齿与轭的磁通密度的幅值及其时间变化率的表达式，结合涡流损耗的基本概念，分别提出了永磁电机定子齿与轭的平均涡流损耗密度的解析计算方法，由此建立了永磁电机铁耗的解析模型。经实验测试和分析可知，实验结果与模型计算结果基本吻合，证明此方法正确、可靠。解析法计算精度高,与电机尺寸及材料属性的关系明显，为永磁电动机的设计和优化提供了有力的工具。

Analytical Calculation of Iron Losses in Permanent Magnet Machine with Beveling Edges

Based on the developed iron loss of surface-mounted permanent magnet (PM) machine of Slemon and Xian Liu, the expressions of the peak and the time rate change of flux density in the teeth and the yoke are derived, considering the beveling edges of the PM. According to the basic concept of the eddy current loss, the analytic calculations of the average eddy current loss density in the teeth and the yoke are presented respectively. Hence, a calculation method for the iron losses of PM with beveling edges is presented. The obtained iron losses are approximately the same as that calculated by the calculation method, which proves the accuracy and efficiency of the method. The results with high accuracy and are directly related to machine dimensions and material properties, which provides a powerful tool for the design and optimization of the permanent magnet motor.