Research on direct torque control system

This passage firstly introduces the background of the direct torque control,basic principle and applications.After that,the passage introduces the basic features of the direct torque control.Unlike the vector control,the direct torque control needs no complicated coordinate transformation.Later,it introduces the basic mathematical model of the asynchronous motor,from which it gives the result of the basic formula for calculating of the torque.Later it comes to introduce the magnetic chain model,including the u-i model and u-i-n model,and analyzes the advantages and disadvantages.At last,it builds the simulation model and simply analyzes the simulation results.