摘要
常规直接转矩控制存在开关频率不固定、转矩和电流波动较大的不足。利用Matlab/Simulink对基于空间矢量调制的直接转矩控制系统进行了仿真研究,并着重分析了影响该系统稳定的几个关键问题,如磁链观测模型选取、定子磁链给定等。仿真结果表明,SVM_DTC策略既保持了常规直接转矩控制的快速动态响应特性,又有效地减小了转矩和电流的脉动,极大地提高了系统的控制性能。
Thc conventional direct torque control has the shortage of unfixed switching frequency and high current and torque ripple. The direct torque control system based on the space vector modulation is researched, and simulated in Matlab/Simulink. Moreover several key problems that affect the stability of system are emphasized, such as the choice of flux linkage estimator, the stator flux linkage reference and so on. The simulation results show that the proposed scheme has the small current distortion and low torque ripple and the fast dynamic response, and the system performancc is improved greatly.
出处
《电气传动自动化》
2008年第5期1-4,共4页
Electric Drive Automation
关键词
永磁同步电机
空间矢量调制
直接转矩控制
permanent magnet synchronous motor
space vector modulation
direct torque control
