降低转矩脉动的矿用异步电机直接转矩控制系统的研究

传统的直接转矩控制方法在整个速度范围运用同一个开关表,无论在低速还是高速范围使用同一定子电压矢量,致使在低开关频率时引起显著的转矩脉动。针对这一缺点,采用一种新颖、控制简单的方案,将DSVM-DTC方法运用于矿用异步电机的控制中,使电机的转矩脉动得到了有效的抑制,通过Matlab/Simulink仿真平台验证了此方法具有优良的动、静态性能。

Mining Induction Motor Study of Direct Torque Control Using DSVM for Minimum Torque Ripple

Either low speed or high speed,the conventional DTC uses the same look-up table in the whole speed region,it causes high torque ripple,especially when the operation condition is low switching frequency.The traditional DTC will be improved by the novel control scheme DSVM-DTC algorithm,which is applied to the control of mining induction motor and reduces the ripple of torque dramatically.The availability of the proposed method is verified through the Matlab/Simulink model.The simulation results show an obvious enhancement of dynamic and steady characteristics with the comparison to conventional method.