Title :
Design and Optimization of a Tunable Magnetoelectric and Electromagnetic Hybrid Vibration-Based Generator for Wireless Sensor Networks
Author :
Jing Qiu ; Yumei Wen ; Ping Li ; Hengjia Chen
Author_Institution :
Sensors & Instrum. Res. Center, Chongqing Univ., Chongqing, China
Abstract :
Vibration energy harvesting, nowadays, has become more and more attractive to power intelligent sensors in wireless sensor networks (WSNs). In this paper, a tunable magnetoelectric (ME) and electromagnetic (EM) hybrid vibration-based generator (HVG) has been proposed. The electric output performances of the proposed ME/EM HVG have been investigated. Compared with the traditional single MEVG or EMVG, the proposed ME/EM HVG obtains a remarkably enhanced output performance. The electric output characteristics involving voltage, current, power, and resonance frequency of the HVG can be well tuned by controlling the number of turns N and the cantilever length L. When L = 5 cm and N = 750, the ME transducer provides a high voltage of 118 V and the coil provides large current of 124.1 mA, respectively. The optimum output power of the HVG achieves 40.84 mW for an acceleration of 0.75 g at a frequency of 25.7 Hz. Remarkably, the proposed ME/EM HVG has great potential for its application in WSNs.
Keywords :
coils; electric generators; electromagnetic devices; energy harvesting; hybrid power systems; intelligent sensors; magnetoelectric effects; optimisation; transducers; vibrations; wireless sensor networks; ME transducer; ME-EM HVG optimisation; WSN; coil; current 124.1 mA; electric output characteristics; electric output performance analysis; electromagnetic hybrid vibration-based generator; frequency 25.7 Hz; power 40.84 mW; power intelligent sensor; size 5 cm; tunable magnetoelectric hybrid vibration-based generator; vibration energy harvesting; voltage 118 V; wireless sensor network; Magnetoelectric effects; Magnetostriction; Power generation; Resonant frequency; Transducers; Vibrations; Wireless sensor networks; Electromagnetic (EM); electromagnetic; magnetoelectric; magnetoelectric (ME); transducer; vibration energy harvester;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2432065