Design of rotating moving-magnet-type VCM actuator for miniaturized mobile robot

초록

A voice coil actuator with a rotating moving magnet has been developed for a miniaturized mobile robot. The actuator has simple structure comprising a magnet, a coil, and a yoke. Actuator performance is predicted using a linearized theoretical model, and dynamic performance based on the air-gap between the magnet and the coil is predicted using motor constant and restoring constant obtained through finite element simulations. The theoretical model was verified using a prototype with 60 Hz resonance and 80 Hz bandwidth. We found that an input of 1.5 V can make the actuator rotate by 20° statically. The driving configuration of the proposed actuator can be simplified because of its implementation of open-loop control. © 2013 The Korean Society of Mechanical Engineers.

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