Regenerative medium-voltage AC drive based on a multicell arrangement with reduced energy storage requirements

Marcelo A. Pérez, José R. Espinoza, José R. Rodríguez, Pablo Lezana

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


Multicell power circuit topologies have proved to be an effective alternative to medium-voltage ac drives. The main advantage is the improved power quality at both the ac system and the motor sides. However, several drawbacks are present in these configurations, such as a lack of sustained regenerative operating mode, uncontrolled input reactive power, and a large second current harmonic that is injected by the load into the dc link of each cell, which leads to a bulky electrolytic capacitor. This paper proposes to replace the input diode- based front-end rectifier with an active front-end rectifier in all cells of the topology and a novel control strategy in order to overcome the aforementioned drawbacks. In fact, the active front-end rectifier allows the topology to regenerate and the control strategy handles the reactive input power and reduces the large second current harmonic from the dc-link capacitor, thus reducing its size. These features are achieved without any penalties in the quality of both the ac input current and the motor voltage waveforms. Experimental results confirm the theoretical considerations.

Original languageEnglish
Pages (from-to)171-180
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Issue number1
Publication statusPublished - Feb 2005


  • Energy storage reduction
  • Multilevel converter
  • Regenerative cell

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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