Affiliations: [a] Technical University of Sofia, Department of
Electrical Apparatus, 8, Kl. Ohridski Blvd, 1000 Sofia, Bulgaria
Correspondence:
[*]
Corresponding author: Ivan Yatchev, Technical University of
Sofia, Department of Electrical Apparatus, 8, Kl. Ohridski Blvd., 1000 Sofia,
Bulgaria. Tel.: +359 2 965 3873; Fax: +359 2 965 4196; E-mail: yatchev@tu-sofia.bg
Abstract: Modelling and characteristics of a newly developed bistable
permanent magnet linear actuator are presented. The permanent magnets are fixed
and the mover is soft magnetic one. The driving and the holding force can be
varied practically independently as they are mainly formed through different
air gaps. Static and dynamic characteristics of the actuator are obtained. The
static force characteristics are obtained using finite element method for
different permanent magnets, different combinations of the two air gaps and
different coil currents. Dynamic characteristics are obtained for actuator with
ferrite magnets. The results for static and dynamic characteristics are
verified experimentally on a prototype of the actuator with ferrite magnets.
Keywords: Linear actuators, permanent magnets, force-stroke characteristics, dynamic characteristics
