小转动惯量永磁同步电机电流环内模控制

Internal Model Control for Current Loop of Small Rotational Inertia PMSM

永磁同步电机调速系统由于电流动态过程中反电势的影响,特别是小转动惯量电机,电流动态响应明显恶化。为了减小电机动态过程中反电势对电流环的影响和改进电流动态响应性能,以考虑旋转反电势永磁同步电机电流二阶系统为对象,依据内模控制原理设计出小转动惯量永磁同步电机电流内模控制器,该方法参数单一,电流动静态性能好,鲁棒性强,工程上容易实现,且系统具有很好的动态加速度性能。最后通过仿真验证该控制器对小转动惯量永磁同步电机电流环控制的有效性。

In the engineering design method of permanent magnet synchronous motor （PMSM） speed control system, especially for small rotational inertia motor, rotating electromotive force perturbation of current loop is effectively inhibited and the current dynamic response is poor. In order to reduce the perturbation of rotating electromotive force and improve dynamic response property of the current loop, internal model control for current loop of small rotational inertia PMSM is presented and this method takes the second - order system of PMSM current loop as controlling object. This control strategy is effective and can achieve not only good dynamic and static performance but also strong robustness, furthermore, it has only single adjusted parameter. Finally the simulation results prove this control method is effectiveness for current loop of small rotational inertia PMSM.