Static Thrust Analysis of A Cylindrical Moving Core Type Linear Oscillatory Actuator

Abstract

This paper deals with a consideration concerning materials for the movers, volume ratio of the stator and of the mover, structure of the mover in a cylindrical moving iron type linear oscillatory actuator (LOA) having a permanent magnet.
Following results are obtained in this paper.
(1) The static thrust characteristics are evaluated on two movers. Movers P and S are made of a permendur and a stainless steel, respectively. It is clarified that the static thrust of the mover P is 30% larger than that of the mover S.
(2) It is suggested that the structure of the mover P should be improved to eliminate a “lump” in static thrust-displacement curve due to the step on the mover, which disturbs smooth motion of the LOA.