直接转矩控制系统减小转矩脉动的仿真研究

Research on Torque Ripple Reduction of Direct Torque Control System

传统的直接转矩控制系统(DTC)转矩脉动较大,本文利用双PI控制方法进行了改进,设计出一种非零电压空间矢量和零电压空间矢量控制器,改进了速度调节器以及开关状态表,利用Matlab/simulink进行了仿真,结果表明,所提方案能极大的减小转矩脉动和转速响应时间,同时算法简单,易于实现。

It is well established that conventional direct torque control（DTC） suffers from high torque .A new controller of nonzero voltage space vector and zero voltage space vector using double-pi is proposed. It improves the speed adjustor and inverter switching table. Simulation results show that the proposed controller manages to reduce the torque ripple and minish the response time of speed. The algorithm is simple and easy to implement.