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Actuators 2015, 4(4), 217-236; doi:10.3390/act4040217

Design and Characterization of a High-Precision Digital Electromagnetic Actuator with Four Discrete Positions

Sorbonne Universités, Université de Technologie de Compiègne, CNRS, UMR 7337 Roberval, Centre de recherche Royallieu, CS 60319, 60203, Compiègne cedex, France
Author to whom correspondence should be addressed.
Academic Editors: Micky Rakotondrabe and Mathieu Grossard
Received: 26 August 2015 / Accepted: 16 October 2015 / Published: 21 October 2015
(This article belongs to the Special Issue High-Resolution Actuators)
View Full-Text   |   Download PDF [1248 KB, uploaded 21 October 2015]   |  


A high-precision planar digital electromagnetic actuator with two displacement directions and four discrete positions is presented in this paper. The four discrete positions are located at each corner of a square cavity where a mobile permanent magnet moves thanks to Lorentz forces generated when a driving current passes through two orthogonal wires placed below the cavity. Four fixed permanent magnets are placed around the cavity in order to ensure high-precision magnetic holding of the mobile magnet at each discrete position. An analytical model of the actuator is presented and used to characterize its properties (switching time, energy consumption, and displaceable mass). Based on this model, an experimental prototype has been developed and then characterized. Comparisons between experimental and simulated results are carried out and show good agreement. The positioning repeatability errors have also been characterized according to the input signal in order to qualify the digital behavior of this high-precision actuator. Finally, an application of this digital actuator as a linear conveyor is presented and experimentally tested. View Full-Text
Keywords: electromagnetic actuator; digital mechanism; two-dimensional displacements; conveyance device electromagnetic actuator; digital mechanism; two-dimensional displacements; conveyance device

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Petit, L.; Dupont, E.; Doré, E.; Lamarque, F.; Prelle, C. Design and Characterization of a High-Precision Digital Electromagnetic Actuator with Four Discrete Positions. Actuators 2015, 4, 217-236.

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