The Development of Permanent Magnet Actuator for Travelling Wave Generator

Abstract

Recently, propulsion structure using traveling wave is being researched. These structures are limited the range to apply. In this study, we develop the traveling wave generator. It can be adapted to various condition. It is composed three same actuators. These actuators are set the parallel to the output shaft. This actuator is composed four springs and two opposite permanent magnets. One side of the permanent magnet is rotated by a motor. And, other side of the permanent magnet moves linear with magnetic attraction power and repulsion power. The actuator is able to change the thrust and stroke by changing the spring constant. We evaluate thrust, range of movement, and so on. The result, maximum thrust is 67[N], maximum stroke is 15.6[mm]. And this actuator is able to drive 3～23[Hz].