矩阵变换器驱动的永磁同步电机模糊直接转矩控制  

Fuzzy Direct Torque Control of Permanent Magnet Synchronous Motor Driven by Matrix Converter

作　　者：蔡星全 黎英[1] 冯号 CAI Xing-quan;LI Ying;FENG Hao(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500

出　　处：《控制工程》2022年第3期564-570,共7页Control Engineering of China

摘　　要：针对永磁同步电机直接转矩控制存在的低速转矩脉动大、高速开关频率高的问题,利用了矩阵变换器电压矢量幅值随输入电压变化的特点,对电压分区和磁链扇区进行重新划分,建立了高、中、低3种不同幅值的开关表。在分析了电压矢量、电机运行速度和负载对电机转矩变化率影响的基础上,采用模糊控制策略取代传统的转矩滞环控制。根据当前电机运行速度和负载大小,选取不同幅值的电压矢量对电机转矩和磁链进行控制。仿真实验结果表明,所提的基于模糊控制的永磁同步电机直接转矩控制系统,可以在从低到高的全速度范围内,有效地降低电机转矩脉动和变频器开关频率,并获得良好的动态性能。For the problems of large torque ripple at low speed and high switching frequency at high speed in the direct torque control of permanent magnet synchronous motors,the characteristics of voltage vector amplitude of the matrix converter varying with the input voltage are used to re-divide the voltage partition and flux linkage sector.Switch tables with three different amplitudes of high,medium and low are established.Based on the analysis of the influence of voltage vector,motor speed and load on motor torque change rate,fuzzy control strategy is used to replace the traditional torque hysteresis control.According to the current motor speed and load,voltage vectors with different amplitudes are selected to control the motor torque and flux linkage.The simulation experiment results show that the proposed direct torque control system of permanent magnet synchronous motor based on fuzzy control can effectively reduce the motor torque ripple and inverter switching frequency in the full speed range from low to high,and obtain good dynamic performance.

关 键 词：矩阵变换器 永磁同步电机 直接转矩控制 模糊控制 开关表 

分 类 号：TM351[电气工程—电机]