Voltage-balance limits in four-level diode-clamped converters with passive front ends

  title={Voltage-balance limits in four-level diode-clamped converters with passive front ends},
  author={Josep Pou and Rafael Pindado and Dushan Boroyevich},
  journal={IEEE Transactions on Industrial Electronics},
Multilevel diode-clamped converters with more than three levels cannot maintain voltage balance in the dc-link capacitors for some operating conditions due to the existence of dc currents in the middle points. Since capacitors are either completely charged or discharged for those conditions, this circumstance severely limits practical application of these converters. The limit explored in this paper is that the four-level converter cannot achieve voltage balance. Proper redundant vectors are… CONTINUE READING
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