A bistable vibration energy harvester with spherical moving magnets: Theoretical modeling and experimental validation

被引：8

作者：

Tu, Dilong ^{[1
]}

Zhang, Yuan ^{[1
]}

Zhu, Lei ^{[1
]}

Fu, Hailing ^{[2
]}

Qin, Yong ^{[3
]}

Liu, Mengzhou ^{[3
]}

Ding, Ao ^{[3
]}

机构：

[1] Beijing Inst Graph Commun, Sch Mech Engn, Beijing 102600, Peoples R China

[2] Loughborough Univ, Wolfson Sch Mech Elect & Mfg Engn, Leicestershire LE11 3TU, England

[3] Beijing Jiaotong Univ, State Key Lab Rail Traff Control & Safety, Beijing 100044, Peoples R China

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2022年 / 345卷

基金：

北京市自然科学基金;

关键词：

Vibration energy harvester; Spherical magnet; Bistable; Broadband; DESIGN; DRIVEN; PERFORMANCE; WALKING;

D O I：

10.1016/j.sna.2022.113782

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In recent years, battery-free self-powered sensing has attracted much attention. However, effective energy harvesting over wide frequency bandwidth is still a great challenge. This paper explores a bistable vibration energy harvester. The harvester uses a spherical magnet as a moving magnet, combining the restoring force of limit spring, attractive magnetic force and gravity to achieve bistability to increase power output and bandwidth. A prototype of the harvester is constructed and characterized experimentally. The nonlinear dynamic model of the harvester is formulated and validated using the experimental data. The impedance matching experiment is carried out at a fixed frequency. The working frequency range is 12-43 Hz at 4.5 g. The maximum peak to peak output voltage is 18.9 V. At 40 Hz and with a 900 omega load, the output power reaches 11.5 mW.

引用

页数：12

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