中文摘要：

本文介绍了直接转矩控制的基本原理，利用PSCAD／EMTDC建立异步电动机直接转矩控制系统仿真平台。仿真结果表明直接转矩控制系统的调速性能优良，转矩响应速度快。

英文摘要：

The paper introduces the principle of Direct Torque Control, and sets up the simulation model for Direct Torque Control of induction machine on the PSCAD/EMTDC. The simulation results show that the system has excellent performances with good speed regulation and fast torque response.