1205 超磁歪アクチュエータの省電力駆動 : 内蔵永久磁石の着減磁に起因する変位変動の低減(アクチュエータとその応用,一般講演)

概要

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In the fundamental configuration of a giant magnetostrictive actuator (GMA), a giant magnetostrictive material (GMM) rod is energized by a coil surrounding it. Continuous electric power supply to the coil is necessary to maintain the expansion of the GMA. However, the electric energy consumption is in proportion to the activation interval of the GMA and becomes larger especially for applications to maintain their expansion in long interval. In our previous research, the GMA drive method which can waste no electric power during GMA expanding was proposed using the magnetization/demagnetization characteristics of interior permanent magnets of the GMA. Due to its driving principle, this drive method has a problem that instantaneous excessive expansion appears at the beginning and end of the GMA expanding. This paper presents two types of improved power-saving drive method to reduce those excessive expansions.
一般社団法人日本機械学会の論文
2010-04-18