Performance of Vibration Power Generators Using Single Crystal and Polycrystal Magnetic Cores of Fe–Ga Alloys

Abstract:

The performance of a vibration power generator using a single crystal core of Fe–Ga alloy was compared with that of a generator using a Fe–Ga alloy polycrystal core with a similar Ga concentration. When the generator using the polycrystal core was forcibly vibrated by 1-G acceleration, the vibration frequency dependence of the open-circuit voltage showed a peak with a maximum value of about 0.14 V at the first resonance frequency due to the inverse magnetostrictive effect. On the other hand, the generator using a single crystal core with a <100> direction parallel to the external stress direction exhibited a maximum value of about 0.26 V, about two-times larger than that of the device using the polycrystal core. Consequently, a vibration energy generator using a single crystal core of Fe–Ga alloy has advantages in performance over a generator using a polycrystal core.

• Periodical: Materials Science Forum (Volume 1016)
• Pages: 453-457
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1016.453
• Online since: January 2021
• Authors: Shun Fujieda*, Naoki Gorai, Toru Kawamata, Rayko Simura, Tsuguo Fukuda, Shigeru Suzuki
• Keywords: Energy Harvesting, Inverse Magnetostrictive Effect, Magnetostriction

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