Title :
A high-efficient broadband energy harvester based on non-contact coupling technique for ambient vibrations
Author :
Wu, X. ; Lee, D.W.
Author_Institution :
Sch. of Mech. Eng., Chonnam Nat. Univ., Gwangju, South Korea
Abstract :
In this paper, a high-efficient piezoelectric energy harvester based on non-contact coupling technique is proposed and characterized, which allows it, for the first time, to take advantage of multi-cantilevers and frequency up-conversion technique to enhance the power generation efficiency for ambient excitation. The unique energy harvester can effectively scavenge environmental vibration energy with a wide bandwidth. Aiming for high space efficiency and less installation constrains, folded cantilevers are designed for this energy harvester. With a load resistance of 50 kΩ, a maximum output power of 18.45 μW is achieved with the fabricated energy harvester, which is a suitable power supply for the sensor nodes in WSN applications.
Keywords :
energy harvesting; piezoelectric transducers; vibrations; WSN applications; ambient excitation; ambient vibrations; environmental vibration energy; folded cantilevers; frequency up-conversion technique; high-efficient broadband energy harvester; installation constrains; multicantilevers; noncontact coupling technique; piezoelectric energy harvester; power 18.45 muW; power generation efficiency enhancement; power supply; resistance 50 kohm; space efficiency; wireless sensor networks; Bandwidth; Couplings; Magnetic resonance; Magnetic separation; Magnetomechanical effects; Vibrations;
Conference_Titel :
Micro Electro Mechanical Systems (MEMS), 2015 28th IEEE International Conference on
Conference_Location :
Estoril
DOI :
10.1109/MEMSYS.2015.7051158
