High-performance torque and flux control for multilevel inverter fed induction motors

Samir Kouro, Rafael Bernal, Hernán Miranda, César A. Silva, José Rodríguez

Research output: Contribution to journalArticle

176 Citations (Scopus)


This paper presents a high-performance torque and flux control strategy for high-power induction motor drives. The control method uses the torque error to control the load angle, obtaining the appropriate flux vector trajectory from which the voltage vector is directly derived based on direct torque control principles. The voltage vector is then generated by an asymmetric cascaded multilevel inverter without need of modulation and filter. Due to the high output quality of the inverter, the torque response presents nearly no ripple. In addition, switching losses are greatly reduced since 80% of the power is delivered by the high-power cell of the asymmetric inverter, which commutates at fundamental frequency. Simulation and experimental results for 81-level inverter are presented. © 2007 IEEE.
Original languageEnglish
Pages (from-to)2116-2123
Number of pages8
JournalIEEE Transactions on Power Electronics
Publication statusPublished - 1 Nov 2007

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