摘要
在航空机电伺服系统中对机电作动器的传统控制大多采用两电平逆变器与PID控制,无法实现对永磁同步电机更高精度控制,针对以上问题与空间矢量调制算法难以解决中点电压平衡的问题,提出了一种基于改进虚拟空间矢量法的模型预测控制方法,并设计了对应的控制策略。通过模型预测控制提高对永磁同步电机的控制响应速度与控制精度,采用输出更趋于正弦波的中点钳位型(NPC)三电平逆变器,利用改进的虚拟空间矢量法(VSVPWM)构建了一种更接近矢量圆的正十二边形虚拟空间矢量图。仿真分析结果表明,改进方法可以实现永磁同步电机低转矩脉动下的稳定运行,同时对中点电压平衡问题有良好控制效果。
The traditional control of electromechanical actuator in aviation electromechanical servo system mostly adopts two-level inverter and PID control,which can not achieve higher precision control of permanent magnet synchronous motor.In view of the above problems and the difficulty of space vector modulation algorithm to solve the problem of neutral point voltage balance,a model predictive control method based on improved virtual space vector method was proposed,and the corresponding control strategy was designed.The model predictive control was used to improve the control response speed and control accuracy of the permanent magnet synchronous motor.The neutral point clamped(NPC)three-level inverter with more sinusoidal output was used.The improved virtual space vector pulse width modulation(VSVPWM)was used to construct a dodecagon virtual space vector diagram closer to the vector circle.The simulation results show that the improved method can realize the stable operation of permanent magnet synchronous motor under low torque ripple,and has a good control effect on the midpoint voltage balance problem.
作者
万劭琦
汪波
关文卿
陈静波
吕从鑫
董海鹰
WAN Shaoqi;WANG Bo;GUAN Wenqing;CHEN Jingbo;LÜCongxin;DONG Haiying(College of New Energy and Power Enginering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China;Lanzhou Wanli Airlines Electromechanical Limited Liability Company,Lanzhou 730070,Gansu,China)
出处
《电气传动》
2024年第12期8-15,共8页
Electric Drive
基金
甘肃省科技重大专项(21ZD4GA005)。
关键词
三电平逆变器
中点电位
模型预测控制
虚拟电压矢量
three-level inverter
midpoint potential
model predictive control
virtual voltage vector
作者简介
万劭琦(1998-),男,硕士研究生,Email:wanshaoqi2021@163.com;通讯作者:董海鹰(1966-),男,博士,教授,博士生导师,Email:hydong@mail.lzjtu.cn。
