摘要
为了改善空间矢量脉宽调制的直接转矩控制系统低速时的控制性能,分析了空间矢量脉宽调制的直接转矩控制系统产生转矩和磁链脉动大、转速超调、抗干扰能力差的原因。利用空间矢量脉宽调制可以合成任意电压矢量的优点结合高阶滑模控制具有较好抗干扰性的特点,将超螺旋(super-twisting)滑模控制理论中不连续的sgn(s)函数替换成连续的sat(s)函数,并将其应用到转速、转矩、磁链的控制器中。为了进一步提升系统低速时的控制性能,建立起了滑模观测器来准确获得转子位置以及转速信息。对所提出的控制理论和改进方法搭建了控制框图,并在MATLAB/Simulink仿真软件上搭建仿真模型。仿真对比表明,该仿真模型不仅能够改善转速超调,同时也能对转矩和磁链脉动起到有效的抑制作用,提升整体系统的鲁棒性。
In order to improve the control performance of the space vector pulse width modulation direct torque control system at low speed,The causes of large torque and flux ripple,speed overshoot,and the poor anti-interference ability of the space vector PWM direct torque control system ware analyzed.The advantage of SVPWM to synthesize any space voltage vector and the good anti-interference character of high order sliding mode ware used.The discontinuous sgn(s)function in Super-twisting sliding mode control theory was replaced by the continuous sat(s)function,which ware applied to the controller of speed,torque and flux linkage.In order to further improve the control performance of the system in low speed,building sliding mode observer to obtain the rotor position and speed information.The control block diagram based on the proposed control theory and improved measures was established,and the simulation model was built in the MATLAB/Simulink simulation software.The simulation results showed that the simulation model can not only improve speed overshoot,but also has an effective inhibitory effect on the ripple of the torque and flux,enhanced robustness of the whole system.
作者
程涛
李红岩
Cheng Tao;Li Hongyan(College of Electrical and Control Engineering,Xi’an University of Science&Technology,Xi’an 710600,China)
出处
《国外电子测量技术》
北大核心
2022年第1期1-7,共7页
Foreign Electronic Measurement Technology
基金
国家自然科学基金(61703329)
陕西省教育厅自然科学基金(18JK1005)项目资助。
作者简介
程涛,硕士研究生,主要研究方向为新型电机控制技术;李红岩,博士,硕士生导师,高级工程师,主要研究方向为新型电机控制技术。E-mail:lihongyan@xust.edu.cn。
