Research on Dynamic Characteristic of Giant Magnetostrictive Actuator

Li Yi Li; Bai Ping Yan; Cheng Ming Zhang

doi:10.4028/www.scientific.net/AMM.513-517.2880

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 513-517Research on Dynamic Characteristic of Giant...

Research on Dynamic Characteristic of Giant Magnetostrictive Actuator

Abstract:

The emphasis of this paper is to research dynamic characteristic of giant magnetostrictive actuator (GMA). First, a prototype of GMA driving by a Φ5×40mm GMM rod (Terfenol-D) is made and the experimental test-bench is set, the optimal pre-pressure of GMA is 129N, and GMA can made 39.5μm strain with 218N output force under 5A current. Then, the energy of electrical, magnetic and mechanical of GMA is studied, equivalent circuit of energy conversion is summarized. At last, dynamic characteristic of GMA is measured, and hysteresis of strain under high frequency is tested. The results show that the resonant frequency of GMA is 1200Hz, and the magnetostriction coupling coefficient up to 0.572. The output strain of GMA increase with the frequency increasing before resonant frequency, and GMA has max output strain (49μm) under 1A current at 1200Hz.

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Periodical:

Applied Mechanics and Materials (Volumes 513-517)

Pages:

2880-2883

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.513-517.2880

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Online since:

February 2014

Authors:

Li Yi Li*, Bai Ping Yan, Cheng Ming Zhang

Keywords:

Actuator, Energy Conversion, Frequency, Giant Magnetostrictive Material

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