异步电动机直接转矩控制调速方法的研究

On Direct Torque Control of Speed Regulation of Induction Motor

在经过大量实验和分析后，建立了逆变器时滞环控制的数学模型．仿真结果得到了初步成功，系统获得较好的动态性能和效率，进一步的工作使其工程实现亦是可望的．

Direct torque control, first proposed by Depenbrock in 1987[1], has quickly found applicationsin electrical cngineering[2-3]. The authors in this paper apply it to simulation study of decoupling inthe speed regulation of induction motor, which, to the author's best knowledge, has not yet beensolved in the open literature.The difficulty faced by the authors is: control character can deteriorate very seriously due to thefact that large variation of rotor parameters (as much as 50%) can make very difficult the decouplingof rotor flux linkage and torque.Depenbrock's method can be utilized to overcome the above difficulty, but its utilization insimulation study requires a mathematical model. Most part of the mathematical model is readilyavailable, but the complete model needs a model for inverter. After much analysis andexperimenting, the authors establish its model, which is abstractable from fig.2.The results of simulation study indicate that the authors succeed preliminarily in obtaing gooddynamic characteristics and efficiency. It looks hopeful that further work will make engineering success a reality.