Compensation of Dead-Time Effect of Speed Sensorless Vector Control System  

作　　者：夏超英 张靖 

机构地区：[1]School of Electrical Engineering and Automation,Tianjin University

出　　处：《Transactions of Tianjin University》2011年第5期351-355,共5页天津大学学报（英文版）

摘　　要：The key of speed sensorless vector control system lies in the accurate orientation of magnetic field. In some field-oriented algorithms, the integrator of observers and the dead-time effect bring in system errors during the estimation of field position. In this paper, a saturated feedback integrator is used, and the dead-time effect is compen- sated by current positive feedback. Experiments were carried out on the hardware platform of MCK2407, with chip TMS320LF2407 from TI Company. The results show that the prooosed method is simole and effective, and the accuracy of field position is improved.The key of speed sensorless vector control system lies in the accurate orientation of magnetic field. In some field-oriented algorithms, the integrator of observers and the dead-time effect bring in system errors during the estimation of field position. In this paper, a saturated feedback integrator is used, and the dead-time effect is compen-sated by current positive feedback. Experiments were carried out on the hardware platform of MCK2407, with chip TMS320LF2407 from TI Company. The results show that the proposed method is simple and effective, and the accuracy of field position is improved.

关 键 词：induction motor speed sensorless vector control DSP COMPENSATION DEAD-TIME field orientation 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TP273[自动化与计算机技术—控制科学与工程]