Title :
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
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;
Conference_Titel :
Electrical and Power Engineering (EPE), 2012 International Conference and Exposition on
Conference_Location :
Iasi
Print_ISBN :
978-1-4673-1173-1
DOI :
10.1109/ICEPE.2012.6463838
