Permanent-magnet flux adaptation for sensorless synchronous motor drives

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


  • Toni Tuovinen
  • Hafiz Asad Ali Awan
  • Jarno Kukkola
  • Seppo E. Saarakkala
  • Marko Hinkkanen

Research units

  • ABB Oy Drives


This paper deals with estimation of the permanent-magnet (PM) flux in sensorless synchronous motor drives. A back-electromotive-force (back-EMF)-based observer is augmented with an adaptation law for the PM flux magnitude. The gains of the augmented observer are designed based on the linearized model. The proposed design makes PM flux estimation independent of speed estimation and enables straightforward analytical pole placement of the observer. Practical design guide-
lines are given. The proposed design is evaluated by means of simulations and laboratory experiments using a 2.2-kW interior PM synchronous motor drive.


Original languageEnglish
Title of host publicationIEEE 9th International Symposium on Sensorless Control for Electrical Drives, SLED 2018
Publication statusPublished - 13 Sep 2018
MoE publication typeA4 Article in a conference publication
EventIEEE International Symposium on Sensorless Control for Electrical Drives - Helsinki, Finland
Duration: 13 Sep 201814 Sep 2018
Conference number: 9

Publication series

NameIEEE international symposium on sensorless control for electrical drives
ISSN (Electronic)2166-6733


ConferenceIEEE International Symposium on Sensorless Control for Electrical Drives
Abbreviated titleSLED
Internet address

    Research areas

  • observer, parameter adaptation, permanent magnet, PM, speed sensorless, stability conditions, adaptation models, synchronous motors, estimation error

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