对于电动汽车无线电能传输（WPT）系统的磁耦合线圈结构优化设计，需综合考虑功率等级、传输效率与经济性等。首先分析了线圈匝数与匝距对传输功率、传输效率及线圈经济性的影响。然后，基于带精英策略的非支配排序遗传算法（NSGA-II），提出了以线圈效率与线圈经济性为优化目标，以3.3 kW额定功率与线圈尺寸为约束边界，对线圈匝数与匝距进行多目标优化设计的方法。最后，基于Maxwell-Simplorer联合仿真验证了优化设计方法的可行性与有效性，优化后线圈最大传输效率可达93.4%，两侧线圈损耗均得到改善。

For the optimization design of magnetic coupling coil structure of wireless power transmission (WPT) system for electric vehicles, power level, transmission efficiency and economy should be considered comprehensively. The effect of number of coil turns and turn-spacing on transmission power, transmission efficiency and coil economy is analyzed first. Then, based on the non-dominated sorting genetic algorithm II (NSGA-II) with elitist strategy, a multi-objective optimization design method is proposed to optimize the coil parameters, such as number of coil turns and turn-spacing. The coil efficiency and coil economy are optimization objectives, and the 3.3 kW rated power and coil size are the constraint boundaries. Finally, based on the Maxwell-Simplorer co-simulation, the feasibility and validity of the optimization design method are verified. The maximum transmission efficiency of the optimized coil is 93.4%〖WTBZ〗, and the coil losses on both sides can be improved.