Title :
Improved virtual vector direct torque control of induction motor based on three-level NPC inverter
Author :
Hou, Liming ; Li, Yunfeng ; Feng, Xiaoyun ; Cui, Hengbin
Author_Institution :
Dept. of Electr. Eng., Southwest Jiao Tong Univ., Chengdu, China
Abstract :
This paper describes the direct torque control method based on improved virtual vector modulation. Neutral-point voltage is used as feedback in control process. Through adjusting the operation time of each vector, the neutral-point voltage variation can be greatly limited and the voltage shifting can be eliminated. The DTC system with a high performance is constructed on the improved technique. Simulation results prove that the improved algorithm is feasible and suitable to the three-level DTC drive based on NPC inverter.
Keywords :
induction motor drives; invertors; machine vector control; torque control; induction motor; neutral-point voltage variation; three-level DTC drive; three-level NPC inverter; virtual vector direct torque control; Induction motors; Instruments; Inverters; Mathematical model; Stators; Switches; Switching frequency; Torque control; Torque measurement; Voltage control; direct torque control; neutral-point voltage balance; three-level inverter; virtual vector;
Conference_Titel :
Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3863-1
Electronic_ISBN :
978-1-4244-3864-8
DOI :
10.1109/ICEMI.2009.5274231
