基于全域解析法对外转子永磁同步电机（PMSM）的空载反电动势、气隙磁密、齿槽转矩等性能求解计算。计算结果与有限元法计算结果较为吻合，验证了全域解析法对外转子PMSM求解的准确性。在此基础上应用第二代非支配排序遗传算法（NSGA-Ⅱ）对电机多个结构参数，多个性能进行多目标优化。与初始方案相比，优化方案的电机综合性能得到有效提高。经过仿真和试验验证，证明了所提方法的合理有效性。

The no-load back electromotive force (EMF), air-gap flux density, cogging torque and the other performances of the outer rotor permanent magnet synchronous motor (PMSM) solved and calculated which based on the global analytical method. The analytical calculated results are in good agreement with those calculated by the finite element method, which verifies the accuracy of the global analytical method for solving the outer rotor PMSM. On this basis, the second-generation non-dominated sorting genetic algorithm (NSGA-Ⅱ) is used to optimize the multiple structural parameters and performance of the motor with multiple objectives. Compared with the original method, the overall performance of the optimized motor has been effectively improved. The simulation as well as experimental verification proves the reasonable validity of the proposed method.