Electromagnetic vibrational energy harvester with targeted frequency-tuning capability based on magnetic levitation  

作　　者：Chengbo Hu Xinyi Wang Zhifei Wang Shudong Wang Yuanyuan Liu Yunjia Li 

机构地区：[1]School of Electrical Engineering,Southeast University,Nanjing 210096,China [2]School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China [3]Xi’an Institute of Space Radio Technology,Xi’an 710100,China

出　　处：《Nanotechnology and Precision Engineering》2024年第4期16-26,共11页纳米技术与精密工程(英文)

基　　金：supported by the Key Research and Development Program of Shaanxi(Program Nos.2022GXLH-01-20 and 2024GXYBXM-193).

摘　　要：This article presents a compact magnetic levitation energy harvester(MLEH)with tunable resonant frequency.Unlike many of the reported tunable harvesters with unknown tuning results,the proposed MLEH can be tuned toward designated resonant frequency values within its tuning range.The targeted tuning processes is realized by a nonlinear magnet repulsive force exerted on a Halbach magnet array,combined with a calibrated scaling system.At a sinusoidal acceleration of±0.15 g,the maximum frequency tuning range of the proposed MLEH is 6.3 Hz(8.1–14.4 Hz),which is 77.8%of its resonant MLEH(8.1 Hz).At a frequency of 9.7 Hz,the output power is 462.1μW and the calculated normalized power density is 496μWcm^(−3)g^(−2).

关 键 词：ELECTROMAGNETICS Magnetic levitation Vibrational energy harvester Frequency tuning Nonlinear system 

分 类 号：TM619[电气工程—电力系统及自动化]