Study on inverter fault-tolerant operation of PMSM DTC  

作　　者：Yznaga Blanco IVONNE Dan SUN Yi-kang HE 

机构地区：[1]School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China [2]Researches and Electrical Tests Center, Cujae University, Havana City 19390, Cuba

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2008年第2期156-164,共9页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project supported by the National Natural Science Foundation of China (No. 50507017);the SRF for ROCS,SEM

摘　　要：This paper presents an investigation of inverter fault-tolerant operation for a permanent magnet synchronous motor （PMSM） direct torque control （DTC） system under various inverter faults. The performance of a faulty standard 6-switch inverter driven PMSM DTC system is analyzed. To avoid the loss or even disaster caused by the inverter faults, a topology-modified inverter with fault-tolerant capability is introduced, which is reconfigured as a 3-phase 4-switch inverter. The modeling of the 4-switch inverter is then analyzed and a novel DTC strategy with a unique nonlinear perpendicular flux observer and feedback compensation scheme is proposed for obtaining a continuous, disturbance-flee drive system. The simulation and experimental results demonstrate that the proposed inverter fault-tolerant PMSM DTC system is able to operate stably and continuously with acceptable static and pretty good dynamic performance.This paper presents an investigation of inverter fault-tolerant operation for a permanent magnet synchronous motor(PMSM)direct torque control(DTC)system under various inverter faults.The performance of a faulty standard 6-switch inverter driven PMSM DTC system is analyzed.To avoid the loss or even disaster caused by the inverter faults,a topology-modified inverter with fault-tolerant capability is introduced,which is reconfigured as a 3-phase 4-switch inverter.The modeling of the 4-switch inverter is then analyzed and a novel DTC strategy with a unique nonlinear perpendicular flux observer and feedback compensation scheme is proposed for obtaining a continuous,disturbance-free drive system.The simulation and experimental results demonstrate that the proposed inverter fault-tolerant PMSM DTC system is able to operate stably and continuously with acceptable static and pretty good dynamic performance.

关 键 词：Permanent magnet synchronous motor （PMSM） Direct torque control （DTC） Fault-tolerant operation Four-switchinverter Nonlinear perpendicular flux observer 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]