Design of permanent magnet synchronous motor based on genetic algorithm in unmanned ground vehicles

This paper presented a design method of permanent magnet synchronous motor (PMSM) of low-speed and high-torque which is applied in unmanned ground vehicle (UGV) drive systems. This method was based on genetic algorithm (GA). Firstly, at the theoretic analysis and calculation stage, the structures of stator lamination, rotor lamination and stator windings were designed; the size of permanent magnet and the length of air gap were calculated and the affection of air gap to flux waveform was discussed. Secondly, at the finite element method (FEM) analysis stage, the magnet field of PMSM was calculated in FEM, and the characteristic of magnet was discussed. At last, at the GA calculation stage, the efficiency of PMSM was set as the objective function and the coefficient was set, the experimented results were reported in the paper.