异步电动机直接转矩控制策略仿真  

Simulation of Asynchronous Motor DTC Strategy

作　　者：董长宏[1] 樊丽萍[2] 王英[2] 

机构地区：[1]大连交通大学软件学院,辽宁大连116028 [2]大连交通大学电气信息学院,辽宁大连116028

出　　处：《计算机仿真》2007年第8期279-282,319,共5页Computer Simulation

摘　　要：介绍了交流传动控制系统的特点,较为系统、深入地研究了异步电机的新型控制(即DTC——直接转矩控制)策略,论述DTC方法在电力牵引交流传动方面控制方法,针对异步电机在低速的直接转矩控制的传统控制给出了控制策略。并提出了以下解决方案:使用改进的开关表;使用三点式带滞环的比较器;解决了异步电动机直接转矩控制低速段时,难于控制转矩、磁通和电流、转矩脉动大的问题。通过Matlab6.5/simulink的建立仿真模型进行仿真验证,仿真结果表明对低速性能的改善是有效的。This paper introduces the features of control system in AC drive. The new control （i. e. , Direct Torque Control） strategy is systematically and thoroughly studied, An amelioration for DTC is pointed out in low - speed running section. In addition, the paper proposes following solutions： using improved switching tables; using comparators with hysteresis at three levels. Thus the paper has found a solution to difficulties in controling torque and flux at very low speed, and high current and torque ripple problems. The model of system based on Matlab6.5/simulink is developed, according to the theory of DTC. The simulation results show that the models developed in this paper have excellent performance.

关 键 词：异步电机 直接转矩控制 仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]