电力牵引系统异步电动机直接转矩控制仿真

Simulation of the Direct Torque Control of Asynchronous Motor in Electric Traction System

基于电力牵引系统中异步电动机直接转矩控制的基本数学模型，建立了该种异步电动机直接转矩控制系统的MATLAB／SIMULINK仿真模型，并进行了仿真。仿真结果表明：采用直接转矩控制的异步电动机具有响应速度快、暂态时间短，负载给定及转速给定突然变化时波动小、磁链幅值保持恒定、系统性能受转子参数影响小等优点，充分证明了直接转矩控制的优越性和有效性。

A simulation model of DSC of asynchronous motor is proposed in electric traction system, according to the basic mathematical formulas of Direct Torque Control （DTC） .The system is simulated using MATLAB/SIMULINK software, and the result shows that DTC has a lot of advantages, such as faster response, shorter transient time, smaller fluctuation and invariable amplitude when load and rotational speed vary, smaller effect when rotor parameter vary. It proves that DTC has superiority and availability.