Title :
Design and Fabrication of a High-Efficiency Magnetostrictive Energy Harvester for High-Impact Vibration Systems
Author :
Baiping Yan ; Chengming Zhang ; Lili Li
Author_Institution :
State Key Lab. of Fluid Power Transm. & Control, Zhejiang Univ., Hangzhou, China
Abstract :
This paper presents the design and fabrication of a vibration energy harvester based on giant magnetostrictive material, which consists of one coil-wound Terfenol-D rod with a permanent magnet (PM) and air gap in each magnetic circuit, and the PM array on the part of a cap amplifier. In this design, cap amplifiers and variable air gap are used to increase the harvesting effect of systems under environmental impact. Modeling and simulation are developed and performed to validate the concept. The relation of magnetic field in Terfenol-D rod is derived, and its uniformity and intensity are analyzed. Then, principal design parameters of the harvester, air gap, and cap amplifiers are determined, and its static analysis of the harvesting effect is performed. In addition, a prototype is fabricated and tested. The magnetostrictive-based vibration energy harvester can generate larger voltage and power than conventional smart harvesters and they can be safely used under the impact up to 20-30 MPa.
Keywords :
energy harvesting; magnetic circuits; magnetostrictive devices; permanent magnets; vibrations; PM array; cap amplifier; coil-wound Terfenol-D rod; giant magnetostrictive material; harvesting effect; magnetic circuit; magnetic field; magnetostrictive-based vibration energy harvester; permanent magnet; pressure 20 MPa to 30 MPa; variable air gap; Magnetic circuits; Magnetic fields; Magnetic flux; Magnetostriction; Mathematical model; Vibrations; Air-gap-adjustable structure; air-gap-adjustable structure; magnetostrictive material; vibration energy harvester;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2441295
