Modified switching-table strategy for reduction of current harmonics in direct torque controlled dualthree-phase permanent magnet synchronous machine drives

Khoa Dang Hoang, Yuan Ren, Zi Qiang Zhu, Martin Foster

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)

Abstract

The switching-table-based direct torque control (ST-DTC) strategies of dual-three-phase permanent magnet synchronous machine (PMSM) drives are investigated in this study. Owing to its inherited advantage of suppression of sixth harmonic torque pulsation, dual-three-phase machine has attracted more and more interests among various sorts of multiphase machines. However, unexpected stator harmonic currents are often observed in the classical ST-DTC strategy for dual-threephase PMSM drives, which cause large losses and decrease the efficiency of the drive system. An optimised ST-DTC strategy which consists a two-step process to determinate the most appropriate inverter voltage vector is proposed to reduce the stator harmonic currents. The merits of the classical DTC, that is, simple structure and good dynamic performance, are still preserved. The experimental results verify that the proposed method can significantly reduce the current harmonics.

Original languageEnglish
Pages (from-to)10-19
Number of pages10
JournalIET Electric Power Applications
Volume9
Issue number1
Early online date1 Jan 2015
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

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