基于DSP三电平异步电动机直接转矩控制研究

Research on Direct Torque Control of Induction Motor with Three-level Inverter Based on DSP

本文研究了基于合成矢量的三电平异步电动机直接转矩控制(DTC)方法,并通过了仿真验证。此方法在三电平逆变器供电的异步电动机上有效的实现了DTC系统,不但能够有效地控制了三电平逆变器的中点电压,并能够有效抑制了输出电压的跳变;而且具有转矩输出高频脉动小,转子转速波动较小的优点,达到了很好的控制性能。

The direct torque control（DTC） of a induction motor system based on synthesizing vectors three-level inverter is researched in this paper.Simulation results show that the system resolves the problems of voltage unbalance of neutral point and high dv/dt of output voltage are completely restrained.It has the advantages of small torque output of high-frequency ripple and small rotor speed fluctuation,and achieves good control performance.