Research on Torque Ripple Minimization Strategy for Direct Torque Control of Induction Motors
In the traditional direct torque control (DTC) of induction motor, the low order harmonic component of stator current is very large when the motor is running at low speed. It leads to high torque ripple of motor in low speed. To solve this problem, a new control method has been proposed in this paper. Base on the traditional DTC method, electromagnetic torque and flux models have been analyzed. To further improve the torque response and reduce the torque ripple, fuzzy logic concept has been introduced into the flux model. The method of dynamic adjustment of the torque hysteresis amplitude is proposed. In this model, fuzzy variables are the speed and stator current error. Through the rationalization of fuzzy classification, the choice of voltage space vector is optimized. The results of simulation show that the method can not only improve the speed of torque response, and the problem of torque ripple can be effectively solved. In the whole speed range, the performance of dynamic and static is better than that of the conventional DTC.
torque ripple direct torque control(DTC) induction motor fuzzy logic
Gao Sheng-wei Cai Yan
School of Electrical Engineering and Automation Tianjin Polytechnic University Tianjin 300160 China
国际会议
太原
英文
278-281
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）