A new torque and flux controller for direct torque control of induction machines

Nik Rumzi Nik Idris, Chuen Ling Toh, Malik E. Elbuluk

Research output: Contribution to journalArticle

76 Citations (Scopus)


This paper presents the implementation of a high-performance direct torque control (DTC) of induction machines drive. DTC has two major problems, namely, high torque ripple and variable switching frequency. In order to solve these problems, this paper proposed a pair of torque and flux controllers to replace the hysteresis-based controllers. The design of these controllers is fully discussed and a set of numerical values of the parameters for the proposed controllers is given. The simulation of the proposed controllers applied to the DTC drive is presented. The simulation results are then verified by experimental results. The hardware implementation is mainly constructed by using DSP TMS320C31 and Altera field-programmable gate array devices. The results prove that a significant torque and stator flux ripples reduction is achieved. Likewise, the switching frequency is fixed at 10.4 kHz and a more sinusoidal phase current is obtained.

Original languageEnglish
Pages (from-to)1358-1366
Number of pages9
JournalIEEE Transactions on Industry Applications
Issue number6
Publication statusPublished - Nov 2006

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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