Title :
Efficiency-optimized space-vector-modulation direct torque control for AC motor drives
Author :
Jian, Linni ; He, Lilin ; Wan, Tao ; Yu, Chuang
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China
Abstract :
In this paper, a new efficiency-optimized space-vector-modulation direct torque control (DTC) scheme is proposed and implemented for induction motor drives. Different from the traditional DTC, in which the flux linkage reference value is set as the rated value, the flux linkage reference value in the proposed DTC is online updated according to the instantaneous load torque and rotational speed by the optimum efficiency unit. Also, the space vector modulation is incorporated to achieve constant switching frequency regulation as well as reduced torque ripple. Simulation and experimental results are given to verify that the proposed scheme can successfully minimize the total power loss, while retaining good dynamic performance.
Keywords :
AC motor drives; frequency control; machine control; torque control; AC motor drives; constant switching frequency regulation; efficiency-optimized space-vector-modulation direct torque control; flux linkage reference value; instantaneous load torque; optimum efficiency unit; torque ripple; total power loss; AC motors; Brushless DC motors; Brushless motors; DC motors; Induction motor drives; Induction motors; Iron; Reluctance motors; Synchronous motors; Torque control; direct torque control; efficiency optimized; induction motor drive; space vector modulation;
Conference_Titel :
Power Electronics and Drive Systems, 2009. PEDS 2009. International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4166-2
Electronic_ISBN :
978-1-4244-4167-9
DOI :
10.1109/PEDS.2009.5385710