IM Torque Control Schemes Based on Stator Current Vector

Bojan Grcar, Gorazd Stumberger, Anton Hofer, Peter Cafuta

Research output: Contribution to journalArticlepeer-review


This paper proposes an induction machine torque control derived from the model in the stator current vector reference frame. The required torque is produced by simultaneously manipulating the magnitude and the rotation speed of the stator current vector, thus forcing the rotor flux linkage vector to change implicitly in such a way that overall stability is preserved. Additional control features include maximal torque-per-ampere ratio in steady state and almost perfect command tracking even if the machine is magnetically saturated. The control adopts a cascaded structure and is based on a partial dynamic inversion of the reduced model that assures existence and uniqueness of the inverse mapping between the required torque, the rotor flux linkage vector, and the stator current vector. Singularity at zero rotor flux linkage represents no restriction for the control performance in the admissible machine operating range. The implementation of the proposed control requires the estimation of the torque-producing rotor flux component and cascaded stator current controllers. Experimental results confirm the key expectations and show the potential and benefits of the proposed control schemes.
Original languageEnglish
Pages (from-to)126-138
JournalIEEE Transactions on Industrial Electronics
Issue number1
Publication statusPublished - 2014

Fields of Expertise

  • Sustainable Systems

Treatment code (Nähere Zuordnung)

  • Experimental
  • Theoretical


Dive into the research topics of 'IM Torque Control Schemes Based on Stator Current Vector'. Together they form a unique fingerprint.

Cite this