Torque ripple reduction in DTC of induction motor driven by three-level inverter with low switching frequency

Kyo Beum Lee, Joong Ho Song, Ick Choy, Ji Yoon Yoo

Research output: Contribution to journalArticle

188 Citations (Scopus)


A torque ripple reduction technique of direct torque control (DTC) for high power induction motors driven by three-level inverters with the inverter switching frequency limited around 0.5-1 kHz level is presented. It is noted that conventional two-level DTC algorithms to reduce torque ripple are devised for applications with relatively high switching frequency above 2-3 kHz and cannot accomplish satisfactory torque ripple reduction for three-level inverter systems with such lower switching frequencies. A new DTC algorithm, especially for low switching frequency inverter system, illustrates quite reduced torque ripple characteristics all over the operating speed region. Simulation and experimental results show effectiveness Of the proposed control algorithm.

Original languageEnglish
Pages (from-to)255-264
Number of pages10
JournalIEEE Transactions on Power Electronics
Issue number2
Publication statusPublished - 2002 Mar 1



  • Direct torque control
  • Induction motor
  • Three-level inverters
  • Torque ripple reduction

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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