Optimal torque control of saturated synchronous motors: plug-and-play method

Hafiz Awan, Zhanfeng Song, Seppo E. Saarakkala, Marko Hinkkanen

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
252 Downloads (Pure)


This paper deals with the optimal state reference calculation for synchronous motors having a magnetically salient rotor. A look-up table computation method for the maximum torque-per-ampere (MTPA) locus, maximum torque-per-volt (MTPV) limit, and field-weakening operation is presented. The proposed method can be used during the start-up of a drive, after the magnetic model identification. It is computationally efficient enough to be implemented directly in the embedded processor of the drive. When combined with an identification method for the magnetic model, the proposed method enables the plug-and-play start-up of an unknown motor. Furthermore, a conventional reference calculation scheme is improved by removing the need for one two-dimensional look-up table. A 6.7-kW synchronous reluctance motor (SyRM) drive is used for experimental validation.
Original languageEnglish
Pages (from-to)6110-6120
JournalIEEE Transactions on Industry Applications
Issue number6
Publication statusPublished - 2 Aug 2018
MoE publication typeA1 Journal article-refereed


  • saturation magnetization
  • synchronous motors
  • table lookup
  • computational modeling
  • torque
  • control systems
  • feedward systems


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