Study of the influence of ferromagnetic material on the characteristics of an actuator based on ferrofluid and permanent magnets

Author

Arcire, A. ; Olaru, Radu ; Petrescu, Camelia

Author_Institution

Fac. of Electr. Eng., “Gheorghe Asachi” Tech. Univ. of Iasi, Iasi, Romania

fYear

2012

fDate

25-27 Oct. 2012

Firstpage

776

Lastpage

780

Abstract

An electromagnetic actuator with a movable nonmagnetic disc immersed in a ferrofluid that is exposed to a non-uniform magnetic field generated by permanent magnets is presented. The position of the levitated disc is stably controlled by the current in a command coil. Numerical simulations and experimental tests show that the actuator has linear transfer characteristics. The effect of utilization of ferromagnetic material in the magnetic circuit of the actuator is studied. The current to force and current to displacement characteristics emphasize the influence of these materials and how these characteristics can be improved. For example, using a cylindrical case made of ferromagnetic material, a significant increase of the force is obtained.

Keywords

electromagnetic actuators; ferromagnetic materials; magnetic fluids; numerical analysis; permanent magnets; actuator characteristics; actuator magnetic circuit; command coil; current-displacement characteristics; current-force characteristics; electromagnetic actuator; ferrofluid magnet; ferromagnetic material utilization effect; levitated disc position; linear transfer characteristics; movable nonmagnetic disc; nonuniform magnetic field; numerical simulations; permanent magnet; Actuators; Coils; Force; Magnetic fields; Magnetic flux; Magnetic levitation; Permanent magnets; electromagnetic actuator; ferrofluid; permanent magnets;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Power Engineering (EPE), 2012 International Conference and Exposition on

Conference_Location

Iasi

Print_ISBN

978-1-4673-1173-1

Type

conf

DOI

10.1109/ICEPE.2012.6463838

Filename

6463838