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Title: Improved close loop stator flux estimation of direct torque control drive
Authors: Rashag, H.F. 
Koh, S.P. 
Abdalla, A.N. 
Tan, N.M.L. 
Chong, K.H. 
Tiong, S.K. 
Jaber, A.S. 
Issue Date: 2012
Journal: Procedia Engineering Volume 38, 2012, Pages 572-577 
Abstract: In conventional direct torque controlled (DTC) induction motor drive, there is usually undesired torque and flux ripple. In this paper close loop stator flux estimation of DTC with space vector modulation under heavy load at low speed was proposed. First, brief description of stator currents in direct-quadrature reference frame with voltage model. Second, close loop stator flux feedback used through PID controller to correct the value of stator flux estimation and eliminate error. In addition, low pass filter also used instead of pure integration to avoid saturation problem. Finally, simulation results show that the flux and torque ripples are greatly reduced when compared with open loop of stator flux estimation. © 2012 Published by Elsevier Ltd.
DOI: 10.1016/j.proeng.2012.06.071
Appears in Collections:COE Scholarly Publication

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