改进无差拍的永磁同步电机自抗扰控制策略

ACTIVE DISTURBANCE REJECTION CONTROL STRATEGY OF PMSM BASED ON IMPROVED DPCC

传统永磁同步电机(PMSM)矢量控制系统受到外界干扰时,容易引起转速、电流剧烈波动。基于这些问题,提出了基于改进无差拍电流预测控制(DPCC)的永磁同步电机自抗扰控制(ADRC)策略。首先,设计自抗扰控制器用于转速环,代替传统的PI控制器,自抗扰会根据扰动强弱自我调节;其次,将改进的无差拍电流预测控制用于电流环,提高了整个系统的控制精度;最后,在Matlab/simulink进行仿真,将速度环ADRC+电流环改进的DPCC,分别与传统PMSM矢量控制系统及速度环PI+电流环改进的DPCC进行对比,结果表明:与传统PMSM矢量控制系统及速度环PI+电流环改进的DPCC控制系统相比,速度环ADRC+电流环改进的DPCC控制系统的超调量更小,抗干扰能力更强。

When the vector control system of traditional permanent magnet synchronous motor(PMSM)was disturbed by the outside interference,it is easy to cause violent fluctuation in speed and electricity.To solve the above problems,an active disturbance rejection control(ADRC)strategy for PMSM based on improved deadbeat predictive current control(DPCC)was proposed.Firstly,the ADRC controller was designed for the speed loop,which replaces the traditional PI controller,and the ADRC would self-adjust according to the strength of the disturbance.Secondly,the improved DPCC was used in the current loop to improve the control accuracy of the whole system.Finally,the speed loop ADRC+current loop improved DPCC was compared with the traditional PMSM vector control system and the speed loop PI+current loop improved DPCC by simulation in Matlab/simulink.The results show that compared with the traditional PMSM vector control system and the speed loop PI+current loop improved DPCC control system,the speed loop ADRC+current loop improved DPCC control system has smaller overshoot and stronger anti-interference ability.