Title :
Ferrofluid liquid spring for vibration energy harvesting
Author :
Yufeng Wang ; Qian Zhang ; Lurui Zhao ; Eun Sok Kim
Author_Institution :
Dept. of Electr. Eng.-Electrophys., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
This paper reports ferrofluid liquid spring used to suspend a magnet array for harvesting vibration energy. A new idea of ferrofluid-based suspension is used for a low resonant frequency for a microfabricated vibration-energy harvester as well as high reliability. The ferrofluid liquid spring has reduced the resonant frequency of a microfabricated electromagnetic energy harvester to around 340 Hz, at which 36 nW is delivered into a matched load of 2.3 Ω from 7 g acceleration.
Keywords :
energy harvesting; magnetic fluids; microfabrication; vibrations; electromagnetic energy harvester; ferrofluid liquid spring; low resonant frequency; magnet array suspension; microfabricated vibration-energy harvester; Acceleration; Arrays; Coils; Magnetic flux; Resonant frequency; Springs; Vibrations;
Conference_Titel :
Micro Electro Mechanical Systems (MEMS), 2015 28th IEEE International Conference on
Conference_Location :
Estoril
DOI :
10.1109/MEMSYS.2015.7050901
