电动车用模块化轴向磁通永磁同步电机宽转速范围效率优化控制方法

An Efficiency Optimization Control Method With Wide Speed Range of Modular Axial Flux Permanent Magnet Synchronous Motor for Electric Vehicle

电动车经常运行在频繁启停、加减速和变负载工况下,宽调速工况下的高效运行是关键问题。该文研究电动车用模块化轴向磁通永磁同步电机的宽转速范围效率优化方法。首先,针对电机模块内定子单元的效率优化问题,提出采用等效损耗电阻在线补偿的损耗最小控制方法,基于损耗模型得到效率最优的控制电流指令值;然后,针对多模块系统的效率优化问题,提出转矩分级优化分配策略,根据模块的效率分布和遗传算法设计电机各模块、模块内各单元的转矩分配方法;最后,通过仿真和实验验证了所提控制方法可以有效降低驱动系统损耗,增加系统高效率区间,提升电动车续航里程。

Electric vehicles often operate under the conditions of frequent start,stop,acceleration,deceleration and variable load,and the efficient control under wide speed range is the key problem.The efficiency optimization method of modular axial flux permanent magnet synchronous motor(AFPMSM)is studied in this paper.First,aiming at the efficiency optimization of stator unit in motor module,a loss minimization control method using online compensation of equivalent loss resistance is proposed,and the optimal control current reference is obtained based on the loss model.Then,according to the efficiency distribution of the module and the genetic algorithm,the torque allocation strategy of each module and each unit in the module is designed to realize the efficiency optimization of the multi-module system.Finally,the simulation and experiment results show that the proposed method can effectively reduce the loss of the drive system,increase the high efficiency range and improve the endurance mileage of electric vehicles.