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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。
Taking a drive motor of a centrally driven electric vehicle as the research object, a motor vector control strategy based on the maximum torque flow ratio is established. Through the simulation of the model, it is found that the stator current and torque of the motor have obvious fluctuation under the control strategy, which will lead to vibration of transmission and powertrain shell. Based on the theory of current harmonic optimization, the motor control strategy is optimized to eliminate the specific order harmonics in current and torque. The simulation results show that the optimized high-amplitude harmonics of motor current and output torque ripple are obviously restrained. The harmonic optimization method laid the foundation for further attenuating the torsional vibration of the power train and the surface vibration of the shell.