三相交流电机直接转矩控制研究

Studyon the direct torque control of three-phase AC motor

目的给直接转矩控制的三相交流电机工程设计提供理论依据及必要的仿真模型。方法根据三相交流电机数学模型,深入分析了直接转矩控制方法的原理,并对传统的磁链划分法进行了改进,在MATLAB/SIMULINK平台上搭建了交流电机直接转矩控制仿真模型。结果仿真结果表明,该直接转矩控制系统响应速度快,具有良好的动稳态性能。结论直接转矩控制系统结构简单,控制精度高,可满足实际工程中交流调速的高性能要求。

Objective-To provide theoretical basis and necessary simulation model for the engi- neering design of the direct torque control of three-phase AC motor. Methods-According to the mathematical model of three-phase AC motor, the principle of direct torque control method is analyzed and the traditional flux partitioning method is improved, the direct torque control simulation model of AC motor is built in MATLAB/SIMULINK simulation platform. Results-The simulation results show that the direct torque control system has quick response speed and good dynamic and static per-formance. Conclusion--Direct torque control system features simple structure and high control precision, so it can satisfy the high performance requirements of AC speed regulation in practical engineering.