Micro Reciprocating Actuator Using Magnetic Fluid and Two Permanent Magnets

概要

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This paper is concerned with the development of micro actuator using magnetic materials. The micro actuator is composed of two permanent NdFeB magnets and kerosene-based magnetic fluid, Ferricolloid HC-50. The actuator is characterized by wireless operation with alternating magnetic field. The driving characteristics of micro magnetic fluid actuator were examined by using a high-speed digital video camera system. The dynamic behavior of magnetic fluid surface at higher frequencies of external alternating field was also examined. It was found that the amplitude of reciprocating actuator depends on significantly frequency and amplitude of alternating magnetic field. The effect of the volume of magnetic fluid adsorbed to the permanent magnets was also examined. The detail of surface oscillation of magnetic fluid subjected to alternating magnetic field was also revealed experimentally.
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