A finite element method based dynamic analysis of a long-stroke linear actuator

The paper proposes a new computational approach for predicting the dynamic response characteristic of magnetic actuators, e.g. a long-stroke linear actuator. This method is based on a comprehensive magnetic energy formulation. Using the magnetic co-energy as a function of position of the armature and magnetomotive force, a system of first order differential equations can be found which relates the electrical supply to the magnetic behavior and the movement of the plunger. (C) 1999 Elsevier Science B.V. All rights reserved.