摘 要：介绍了直接转矩控制的原理和基本结构；完成了以DSP为核心的三相异步电机直接转矩控制系统硬件设计和软件设计。以YF906型三相异步电机为被控对象进行实验，结果表明，电路结构合理，具有较好的控制功能和保护措施。在这个平台上可以实现较为复杂的控制算法。
Abstract: AT first,Analyzed the basic theory of the ISAD,the mathematical models of the ISAD was built,the different turn-on and turn-off angle the average torque was simulated,and the turn-on and turn-off angle of contrarily torque was produced,At last,the optimizing instantaneous torque was analyzed.So Switched Reluctance Motor small start current,and big start torque,this is conduce to auto start.
Key Words: ISAD；Instantaneous torque；Optimizing the turn-on and turn-off angle；Simulation；SRM;Experiment
