標題: A Miniature Magnetic-Piezoelectric Thermal Energy Harvester
作者: Chen, Chin-Chung
Chung, Tien-Kan
Tseng, Chia-Yuan
Hung, Chiao-Fang
Yeh, Po-Chen
Cheng, Chih-Cheng
機械工程學系
Department of Mechanical Engineering
關鍵字: Energy harvester;magnetic;piezoelectric;power generator;thermal;thermomagnetic
公開日期: 1-七月-2015
摘要: In this paper, we report a miniature thermal energy harvester with a novel magnetic-piezoelectric design. The harvester consists of a soft magnetic Gd cantilever beam, a piezoelectric lead zirconate titanate sheet, an NdFeB hard magnet, silicon clamps, and a silicon frame. In this design, the harvester is driven by a temperature difference between a cold side and room temperature ambient air, unlike other magnetic-piezoelectric thermal energy harvesters that are driven by a temperature difference between a cold side and a hot side or between two hot sides. Experimental results show that with a temperature difference of 20 degrees C (cold side: 6.7 degrees C, hot side: 26.7 degrees C), the harvester produces a maximum peak-to-peak voltage of 37 mV and a root mean square voltage of 1.98 mV. The estimated maximum instantaneous power density and average power density is 21.7 nW/cm(3) and 62.9 pW/cm(3), respectively. Moreover, the total volume of our harvester (length x width x height: 6 x 3.5 x 3 mm) is 217 times lower than that of previous experimental harvesters and 38 times smaller than that of previous theoretical-modeled harvesters. Therefore, our harvester is the smallest machined magnetic-piezoelectric thermal energy harvester designed to date. These features enable our harvester to be more easily implemented and integrated with micro wireless sensors and thereby increase more self-powered wireless-sensing applications.
URI: http://dx.doi.org/10.1109/TMAG.2015.2395385
http://hdl.handle.net/11536/128067
ISSN: 0018-9464
DOI: 10.1109/TMAG.2015.2395385
期刊: IEEE TRANSACTIONS ON MAGNETICS
Volume: 51
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