Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Flying Capacitor DTC Drive with Reductions in Common Mode Voltage and Stator Overvoltage

  • Rahmati, Abdolreza (Dept. of Electrical Engineering, Iran University of Science and Technology) ;
  • Arasteh, Mohammad (Dept. of Electrical Engineering, Iran University of Science and Technology) ;
  • Farhangi, Shahrokh (School of Electrical and Computer Engineering, University of Tehran) ;
  • Abrishamifar, Adib (Dept. of Electrical Engineering, Iran University of Science and Technology)
  • Received : 2010.12.20
  • Published : 2011.07.20
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Abstract

This paper gives a detailed analysis of the direct torque control (DTC) strategy in a five-level drive and proposes a 24-sector switching table. The known problems in low-voltage drives such as bearings currents and an overvoltage phenomenon which leads to premature failure are reviewed and the occurrence of these problems in medium voltage drives has been investigated. Then a solutions to these problems is presented and the switching table to deal with these problems is modified. Simulation and experimental results on a 3kVA prototype confirm the proposed solution. In implementing the above strategy a TMS320F2812 is used.

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References

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