Modeling and Control of Magnetic Actuation Systems Based on Sensorless Displacement Information

Alon Cervera, Ofer Ezra, Alon Kuperman, Mor Mordechai Peretz

Research output: Contribution to journalArticlepeer-review


This paper reveals the design and implementation of a magnetic actuation system (MAS) with noninvasive displacement measurement by current sensing only. A platform-independent MAS modeling methodology is utilized, describing the cross-coupled system behavior by the physical representation of mechanical and electromagnetic counterparts. An extended nonlinear inductor model is developed, demonstrating the challenging control task of displacement regulation. The inductor model facilitates the development of a combined current sensing methodology employing noninvasive displacement measurement. The combined sensor, based on adding a "shunt inductor" in series to the main actuator, performs both high-resolution displacement and dc current measurement with fast response and minimum losses. The MAS model and the combined sensor-based operation have been experimentally verified on a single-axis levitator prototype.

Original languageAmerican English
Article number8392518
Pages (from-to)4849-4859
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Issue number6
StatePublished - 1 Jun 2019


  • modeling
  • sensorless measurement

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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