基于扩展电压矢量的三矢量模型预测电流控制策略  

Three-vector model predictive current control strategy based on extended voltage vectors

作　　者：赵昕博 刘慧博[1] Zhao Xinbo;Liu Huibo(School of Information Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学信息工程学院,包头014010

出　　处：《电子测量技术》2024年第12期91-99,共9页Electronic Measurement Technology

基　　金：动基座光电跟踪系统有限时间分布式协同控制及优化问题的研究(62063027)项目资助。

摘　　要：针对传统永磁同步电机模型预测电流控制策略中矢量作用方向、幅值局限导致控制系统稳态特性不佳的问题,提出一种改进的三矢量模型预测电流控制策略。首先,引入虚拟矢量来扩展电压矢量控制集为系统提供更灵活的控制选择。其次,根据无差拍控制原理获得参考电压矢量,并判断出参考电压矢量在扇区的具体位置。以电压矢量为价值函数的基础元素,并对参考电压矢量与有效电压矢量做差分析。根据设计出的筛规则获得最优有效电压矢量,简化了电压矢量筛选过程。通过实验结果表明,对比于传统的模型预测电流控制,本文所提出的控制策略显著地减少了电流与转矩脉动,另外在电机转速方面呈现出更加平滑的速度曲线与更小的超调量,提高了电机的动态响应性能与控制能力。In view of the problem of the limited vector action direction and amplitude of the control system in the prediction current control strategy,an optimized three-vector model prediction current control strategy is proposed.First,a virtual vector is introduced to extend the voltage vector control set to provide more flexible control choices for the system.Secondly,the reference voltage vector is obtained according to the difference-free control principle,and the specific position of the reference voltage vector in the sector is determined.Taking the voltage vector as the basic element of the value function,it analyzes the difference between the reference voltage vector and the effective voltage vector.The optimal effective voltage vector is obtained according to the designed screening rules,which simplifies the voltage vector screening process.The experimental results show that,compared with the traditional model predictive current control,the control strategy proposed in this paper significantly reduces the current and torque ripple,and presents a smoother speed curve and smaller overshoot in the speed of the motor.the dynamic response performance and control ability of the motor are improved.

关 键 词：表贴式永磁同步电机 模型预测电流控制 三矢量 扩展矢量 无差拍控制原理 

分 类 号：TM351[电气工程—电机] TN602[电子电信—电路与系统]