Title :
Control of stator torsional vibration in PM brushless AC drives due to non-sinusoidal back-EMF and cogging torque by improved direct torque control
Author :
Zhu, Z.Q. ; Leong, J.H. ; Liu, X.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield, UK
Abstract :
This paper presents a comparative study of the stator frame torsional vibration induced in indirect- and direct-torque controlled permanent magnet brushless AC drives with non-sinusoidal back-EMF waveforms. An improved direct torque controller, which accounts for the influences of non-ideal back-EMF and cogging torque, is proposed. Its effectiveness in minimizing low order stator frame torsional vibration is validated and confirmed experimentally.
Keywords :
AC motor drives; brushless machines; electric potential; machine control; permanent magnet motors; torque control; vibration control; cogging torque; direct-torque controlled permanent magnet brushless AC drive; improved direct torque control; indirect-torque controlled permanent magnet brushless AC drive; nonsinusoidal back-EMF; stator frame torsional vibration; stator torsional vibration control; Electromagnetics; Forging; Harmonic analysis; Hysteresis; Stators; Torque; Vibrations; brushless AC machine; direct torque control; permanent magnet; torsional vibration;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2011 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-1044-5
DOI :
10.1109/ICEMS.2011.6073445
