Single-sensor-based three-phase permanent-magnet synchronous motor drive system with luenberger observers for motor line current reconstruction

Bahaa Hafez, Ayman S. Abdel-Khalik, Ahmed M. Massoud, Shehab Ahmed, Robert D. Lorenz

Research output: Contribution to journalArticle

34 Citations (Scopus)


This paper presents an algorithm that enables single-sensor operation of vector-controlled three-phase permanent-magnet-synchronous-motor voltage source inverter (VSI)-based drive systems. The closed-loop operation is performed through measuring only the VSI dc-link current. The measured VSI dc-link current is fed to a space-vector-based lookup table, which reconstructs the motor line currents. Three Luenberger-style observers are used to filter out the reconstructed motor line currents and estimate the rotor position and speed. The effect of observer bandwidth on the accuracy of the motor's estimated parameters is also investigated. The drive system's physical dynamic stiffness is used as a key metric to compare the drive system performance in single-sensor mode and fully sensored mode, in order to find the lowest steady-state speed limit for the single-sensor drive system operation.

Original languageEnglish
Article number6697838
Pages (from-to)2602-2613
Number of pages12
JournalIEEE Transactions on Industry Applications
Issue number4
Publication statusPublished - 1 Jan 2014



  • DC-link current measurement
  • permanentmagnet synchronous motor (PMSM) position estimation
  • threephase current reconstruction
  • vector-controlled PMSM

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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