基于MRAS观测器的三相四开关逆变器驱动PMSM系统模型预测电流控制  

Model Predictive Current Control for PMSM Systems Driven by a Three-phase Four-switch Inverter Based on a MRAS Observer

作　　者：滕青芳[1,2] 靳宇星 李姝湲 李国飞[4] 

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070 [2]光电技术与智能控制教育部重点实验室,甘肃兰州730070 [3]武警陕西总队第一支队,陕西西安712000 [4]北京航空航天大学自动化科学与电气工程学院,北京100089

出　　处：《信息与控制》2017年第2期165-171,共7页Information and Control

基　　金：国家自然科学基金资助项目(61463025)

摘　　要：针对三相四开关容错逆变器(TPFSI)的永磁同步电机(PMSM)驱动系统,基于模型参考自适应(MRAS)观测器,提出了一种模型预测电流控制(MPCC)策略.考虑温度变化对定子电阻的影响,基于MRAS技术对MPCC算法中所需的定子电阻进行了在线辨识;为了降低逆变器的平均开关频率,采用了开关频率可优化的MPCC系统目标函数.仿真结果表明,所提出的设计方法可以使三相四开关逆变器驱动的PMSM系统稳定运行,能够有效地降低逆变器的平均开关频率,对定子电阻变化具有强的鲁棒性,从而达到满意的转矩和转速控制效果.Based on a three-phase four-switch inverter,we propose a model of predictive current control( MPCC)strategy for permanent magnet synchronous motor( PMSM) drive systems with a model reference adaptive system( MRAS) observer. Because stator resistance varies with temperature change,we design an MRAS observer to identify stator resistance online. In order to reduce the average switching frequency of the inverter,switch frequency optimization is taken into account in the design of the MPCC cost function. Numerical simulation results illustrate that the proposed MPCC enables the whole system to run stably,decreases the average switching frequency of the inverter,shows strong robustness with respect to stator resistance,and consequently achieves satisfactory torque and speed control.

关 键 词：三相四开关逆变器(TPFSI)模型预测电流控制(MPCC)永磁同步电机(PMSM)模型参考自适应观测器定子电阻辨识 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]