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介绍了一种计算永磁同步电机电磁转矩的新方法，即磁通法。其原理是利用有限元法，从磁场中求出每极的基波磁通Φm和功率角δi，再根据Φm和δi求出电磁转矩。该方法对网格离散化不敏感，无需积分，计算省时。“,”This paper presents a method for calculating magnetic torque of permanent magnet synchronous machine,which is called as flus method. It is based on finite element analysis to calculate fundamental flux Φm and power angle δ,and hence to determine magnetic tarque. The flux method is free of the sensitivity to the mesh discretization and saves calculating time.