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从气隙磁场调制的角度分析五相容错式磁通切换永磁(fault-tolerant flux-switching permanent-magnet,FT-FSPM)电机的运行机理.对10/18极、10/19极FT-FSPM电机永磁体和电枢电流单独作用下的气隙磁密进行解析计算,并运用有限元对其进行验证.磁场分别由永磁体和电枢绕组产生,当两者产生的气隙磁密的谐波次数以及旋转速度相等时,这些谐波才能称为有效工作波.在此基础上,用气隙磁场调制理论分析各次有效工作波产生的转矩占总平均转矩的比例.研究表明,五相FT-FSPM电机由一些工作波产生电磁转矩,这些工作波产生的转矩占总平均转矩的比例大于97%.实验验证解析计算和有限元仿真的合理性.“,”The operation principle of the five-phase fault-tolerant flux-switching permanent-magnet (FT-FSPM) motors was analyzed from the perspective of air-gap magnetic field modulation. The magnetic flux densities of 10/18 pole and 10/19 pole FT-FSPM motors which generated by the permanent magnet and the armature winding respectively were analyzed and calculated, and validated by finite element analysis. The magnetic field is generated by the PMs and the armature windings respectively. When the field harmonics and the rotational speed are both the same, these harmonics can be called the effective working harmonics. On this basis, the ratio of the torque generated by the effective working harmonics to the total average torque was analyzed by the air-gap magnetic field modulation theory. It is revealed that the five-phase FT-FSPM motors generate electromagnetic torque from some effective working harmonics, and these harmonics produce greater than 97% of the average electromagnetic torque. Experimental results verify the analytical and simulation results.