中文摘要：

针对轴向充磁圆筒型永磁直线电机的磁场分布和气隙磁场的计算与径向充磁问题，提出了一种基于基本气隙磁场计算轴向充磁圆筒型永磁直线电机磁场的解析计算法．利用许-克变换计算出了该种结构的无槽和开槽后的基本气隙磁场强度，再计算出气隙最小处的气隙磁场强度，最终得出整个电机的气隙磁场．以一台10极9槽轴向充磁永磁直线样机为例来验证所提方法的有效性和准确性．结果表明：解析法和有限元法计算气隙磁场强度的变化规律完全一致，峰值分别为1．3T和1．28T，两者结果吻合较好．所提方法是一种快捷、有效、计算精度高的方法．

英文摘要：

Aiming at the problem of the air-gap magnetic field distribution and calculation of the axially magnetized tubular permanent magnet linear motor（ TPMLM）, which is very different from the radially magnetized tubular per- manent magnet linear motor, a new analytic method of calculating air-gap magnetic field of the axially magnetized TPMLM was proposed for this paper, which was based on the basic air-gap magnetic field. This tool had calculated the basic air-gap magnetic field intensity of the slotless and slotted structure by using the Schwarz-Christoffel meth- od. And the air-gap magnetic field intensity of the motor was derived from the calculation of the magnetic field in- tensity at the minimum air-gap. A 10-pole 9-slot axially magnetized TPMLM was studied to verify the validity and accuracy of the proposed method. The results showed that the peaks of the air-gap magnetic field calculated by the analytical method and finite element method were 1.3 T and 1.28 T. The variation principle of the air-gap magnetic field obtained from the two methods above had the same trends. The two results were in good agreement. The pro- posed method for calculating motor magnetic field is proven to be quick, effective, and accurate.