Affiliations: [a] Faculty of Electrical Engineering, "Ghe. Asachi"
Technical University of Iasi, Iasi, Romania
Correspondence:
[*]
Corresponding author: R. Olaru, "Ghe. Asachi" Faculty of
Electrical Engineering, Technical University of Iasi, 23 Prof. D. Mangeron
Street, 700050 Iasi, Romania. Tel.: +40 232 27 86 83; Fax: +40 232 23 76 27;
E-mail: rolaru@ee.tuiasi.ro
Abstract: The paper describes a newly developed miniature moving-magnet type
linear actuator with proportional action that uses repulsive magnetic forces.
Out of four possible structures, two with mobile magnets and two with fixed
ones, the most simple and cheap prototype was chosen, offering good
possibilities to obtain a miniature structure. A comparative numerical analysis
for two types of mobile element justifies the adopted constructive solution. A
laboratory prototype was analyzed numerically and experimentally in view of a
possible optimization, the experimental and numerical results being in good
agreement. Finally a prototype actuator was built and tested.
Keywords: Actuators, moving magnet actuators, electromagnetic actuators, repulsive magnetic force, ring magnets
