基于电流谐波优化的驱动电机转矩波动控制

Active Control of the Electrical Machines Fluctuating Torque Based on Current Harmonics Optimization

以某款集中驱动式电动车的驱动电机为研究对象,建立基于最大转矩流比的电机矢量控制策略。通过模型仿真,发现电机定转子电流和转矩在该控制策略下存在较为明显的波动,将引发传动系和动力总成壳体振动。基于电流谐波优化理论,对所建立的电机控制策略进行有针对性的优化,消除电流和转矩中的特定阶次谐波。仿真结果表明,优化后电机电流和输出转矩波动的高幅值谐波得到了明显的抑制;所用谐波优化方法为进一步衰减传动系扭转振动和总成壳体表面振动奠定了基础。

Considering the influence of electrical machine and transmission s pere control strategy of a central driven EV powertrain was established. It was foun ystem, a maximum torque per am- d, that the fluctuating phenomenon of electrical machines current and torque was obvious. The vibration of transmission system and powertrain shell would be worse. To eliminate these harmonic fluctuations, the control strategy was optimized based on current har- monic optimization theory. The fluctuating phenomenon of electrical machines current and torque was obviously im- proved. The optimized model laid the foundation for the subsequent optimization of structural vibration.