科研之友
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摘要
Based on the exact analytical method, this paper calculates the no-load back electromotive force, air gap flux density, cogging torque, and electromagnetic torque of outer rotor wheel-hub permanent magnet synchronous motor (PMSM); the calculation results are in good agreement with those of the finite element method, which verifies the accuracy of the exact analytical method for solving the outer rotor PMSM. On this basis, the second-generation non-dominated sorting genetic algorithm (NSGA-II) is applied to optimize the multiple structural parameters and performance of the motor more quickly. Compared with the initial scheme of the motor, the torque ripple and permanent magnet mass of the optimized scheme is decreased by a quarter; the average electromagnetic torque, efficiency is also improved. Finally, the simulation and experimental results show that the proposed method is reasonable and effective.
