Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Comparison of Efficiency for Different Switching Tables in Six-Phase Induction Motor DTC Drive

  • Taheri, Asghar (Dept. of Electrical and Electronics Eng., Iran University of Science & Technology) ;
  • Rahmati, Abdolreza (Dept. of Electrical and Electronics Eng., Iran University of Science & Technology) ;
  • Kaboli, Shahriyar (Dept. of Electrical and Electronics Eng., Sharif University of Technology)
  • Received : 2010.06.17
  • Accepted : 2011.10.31
  • Published : 2012.01.20
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Abstract

In this paper, different switching tables proposed for the Direct Torque Controlled (DTC) of a six-phase induction machine are simulated and implemented. A six-phase induction motor has 64 space voltage vectors which result in increased complexity in the selecting of inverters switching. The unsuitable selection of a switching table leads to large harmonics especially at low speed and it also reduces drive efficiency. A six-phase induction machine has large zero sequence harmonic currents of the order $6{\kappa}{\pm}1$. These harmonic currents are varied in various techniques. Decreasing this loss is essential in a six-phase induction machine. The main purpose of this paper is to improve the ST-DTC of six-phase induction machines to reduce the voltage and current harmonics and the torque pulsation. Selecting a suitable method for minimizing these harmonics is very important.

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References

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