A Comparison of Sensorless MTPA and Quasi-MPF Control for VSD-PMaSynRM


47th Annual Conference of the IEEE Industrial Electronics Society (IECON 2021), Toronto, Canada, 13 October 2021 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/iecon48115.2021.9589477
  • City: Toronto
  • Country: Canada
  • Keywords: Permanent Magnet Assisted Synchronous Reluctance Motor (PMaSynRM), Sensorless Control, Maximum Torque per Ampere (MTPA), Maximum Power Factor Control (MPFC), OBSERVER, DRIVE
  • Istanbul Technical University Affiliated: Yes


Permanent Magnet Assisted Synchronous Reluctance Motor (PMaSynRM) is one of the most popular motors in variable speed drive (VSD) systems nowadays due to their comparable cost, maintenance requirement, efficiency and power density in contrast with other popular motors such as Induction Motor (IM) and Permanent Magnet Synchronous Motor (PMSM). Further improvements in cost and reliability are achieved with the sensorless control of PMaSynRMs while overall performance of the machine strongly depends on the control type. This study presents an experimental comparison of two control types; the Maximum Torque per Ampere (MTPA) Control and Maximum Power Factor Control (MPFC) which are the sensorless control implementations in the constant torque region. Both control methods are modelled in a simulation environment and the proposed approaches are experimentally evaluated and compared. In the case of MTPA, up to 5.15% and 13.99% increase for the efficiency and torque per ampere respectively are observed at base speed compared to those of MPFC. On the other hand, with MPFC, up to 0.1 increase in power factor and nearly 20% decrease in the base speed voltage are obtained in contrast to MTPA.