Improved close loop stator flux estimation of direct torque control drive

Hassan Farhan Rashag, S. P. Koh, Ahmed N. Abdalla, Nadia M.L. Tan, K. H. Chong, S. K. Tiong, Aqeel S. Jaber

Research output: Journal PublicationConference articlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)572-577
Number of pages6
JournalProcedia Engineering
Publication statusPublished - 2012
Externally publishedYes
EventInternational Conference on Modelling Optimization and Computing - TamilNadu, India
Duration: 10 Apr 201211 Apr 2012


  • Direct torque control
  • Induction motor
  • Space vector modulation
  • Stator flux estimation

ASJC Scopus subject areas

  • Engineering (all)


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