3209 超磁歪アクチュエータの二位置制御における省電力駆動に関する研究(J22-2 次世代アクチュエータシステム(2),ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

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 stretch of the GMA. However, the electric power consumption is in proportion to the activation interval of the GMA and becomes larger especially for applications to maintain their stretch in long interval. This study developed a new GMA drive method which wasted no electric power during stretch. Permanent magnet rods (Alnico) are located around the GMM rod, which are magnetized and demagnetized by the coil impulsively. The permanent magnets supply the magnetic field to the GMM rod without electric power consumption in maintaining the GMA stretch. It is possible to achieve both the power saving drive of the GMA and reduction of its thermal expansion.
一般社団法人日本機械学会の論文
2008-08-02