Improvement of starting characteristic for moving magnet type linear oscillatory actuator using spring damper

Abstract

This paper deals with the improvement of starting characteristic for Moving Magnet type Linear Oscillatory Actuator (MM-LOA) using a spring damper. MM-LOA is applied to variable loads such as vacuum pumps and compressors. However, it has the characteristic of over-displacement in starting state because of the low inertia of mover. To improve the starting characteristic, a spring damper has been adopted in a mechanical system. The design parameters have been computed by 2-D Finite Element Analysis (2-D FEA). In addition, dynamic characteristic analysis has been performed by time differential method. The propriety of improved starting characteristic is verified by a comparison of analyzed results with those of experiments.