基于改进离散空间矢量调制的直接转矩控制系统  

Direct Torque Control Based on Improved Discrete Space Vector Modulation

作　　者：魏欣[1] 陈大跃[1] 赵春宇[1] 

机构地区：[1]上海交通大学仪器系,上海200030

出　　处：《电机与控制应用》2006年第8期16-21,共6页Electric machines & control application

基　　金：教育部重点科技项目(02097)

摘　　要：提出一种基于离散空间矢量调制(DSVM)技术的异步电机直接转矩控制(DTC)的改进算法,并对其进行仿真研究。在DSVM技术中,每个采样周期分为3个相等的时间段,每个时间段中作用1个电压矢量。改变这3个电压矢量的作用顺序,不会改变最终的控制目标,但是对转矩脉动有很大影响。通过分析每个采样周期中的转矩波形,得到优化的电压矢量选择表。在MATLAB/Simulink下对DSVMDTC系统进行建模仿真,详细阐述模型结构。最后,给出仿真运行结果并进行分析。仿真结果证明所提出的DSVMDTC算法能够进一步减小转矩脉动。An improved direct torque control （DTC） algorithm based on discrete space vector modulation （DSVM ） is presented, and its simulation research is performed. In DSVM technique, one sampling period is divided into three equal time intervals, and each time interval is applied a voltage vector. Changing the sequence of the three voltage vector does not change the final control destination, but it can affect the torque ripple. By analyzing the torque waveforms in each sampling period, an optimized voltage vector selecting table is given. Afterwards, the DSVM-DTC system is modeled and simulated in MATLAB/Simulink. The structure of the model is described in detail. Finally, simulation results are given and discussed. Simulation results verify that the torque ripple is reduced in the proposed DSVM-DTC.

关 键 词：直接转矩控制 离散空间矢量调制 异步电机 

分 类 号：TM301.2[电气工程—电机]