Efficient Solution for Accurate Microstepping Using Linear Switched Reluctance Step Actuator

Abstract

In this paper is proposed a microstep control strategy, developed for linear switched reluctance step actuators characterized by magnetic dissymmetry between the end and the central phases. In this way, a parameterized finite element model is developed for the studied actuators, and used for electromagnetic force evaluation according to the plunger position and the supply currents of the phase. The obtained forces are regrouped within response surfaces which are inverted in order to determine the supply current configurations required for accurate microstepping.