为改进小转动惯量永磁同步电机电流动态响应性能,建立考虑旋转反电动势和逆变器环节的永磁同步电机电流环三阶数学模型,以该数学模型为基础,设计小转动惯量永磁同步电机电流环二自由度内模控制器。并针对该电流控制系统的鲁棒性能与内模控制器参数、反馈滤波器参数都相关的问题,引入新的反馈滤波器,使两参数分别调节系统的动态跟踪性能和鲁棒性能。详细分析该内模控制方法下系统参数敏感度和负载对电流动态性能的影响。最后通过仿真和实验,表明该方法有助于提高小转动惯量永磁同步电机电流动态响应性能,且参数调整简单明确。In order to improve the current dynamic response performance of small rotational inertia permanent magnet synchronous motor(PMSM),a three-order mathematic model of current loop considering rotating electromotive force and inverter was built.Based on that,a two-degree-freedom internal model control(2Dof-IMC) for current loop was proposed.With the problem,robustness of 2Dof-IMC system was dependent on two parameters of the feedback filter and internal controller,a new feedback filter was designed.Then current dynamic following performance and system robustness can be adjusted by corresponding parameter.In addition,the system sensitivity function and effect of load on current dynamic response performance were analyzed in detail.Finally by means of simulation and experiment,it is confirmed that this control strategy can improve the current dynamic response performance of small rotational inertia PMSM,and adjustment of its parameter is simple and definite.福建省自然科学基金(2010J05141
