永磁交流伺服自抗扰直接转矩控制

摘要

Based on active-disturbance rejection controller( ADRC ) theory, a direct torque control (DTC) system of permanent magnet AC servo was established. In the system uncertain external load disturbance( external disturbances) and system parameters variations (internal disturbances) were regarded as one integrated disturbance,and ADRC was used to observe and compensate this integrated disturbance. The simulation results show this system has very strong robustness not only to uncertain external load disturbance,but also to internal parameter variations such as coefficient of torque. Compared with PI controller,the system has higher dynamic performance,powerful capability of anti-interference and high control precision,etc.%设计了一种基于自抗扰控制器的永磁同步电动机直接转矩控制系统.该系统将不确定性负载扰动(外扰)和系统参数变化(内扰)视为一个综合扰动项,然后利用自抗扰控制器(ADRC)对综合扰动项进行观测和补偿.仿真结果证明,该系统不仅有效地抑制了不确定负载扰动的影响,同时对系统内部参数如电机转动惯量等摄动也具有较强的鲁棒性.该系统相比PI控制具有动态控制性能优越、抗扰能力强、控制精度高等特点.