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

Dilong Tu, Yuan Zhang, Lei Zhu*, Hailing Fu, Yong Qin, Mengzhou Liu, Ao Ding

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

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 Ω load, the output power reaches 11.5 mW.

Original languageEnglish
Article number113782
JournalSensors and Actuators A: Physical
Volume345
DOIs
Publication statusPublished - 1 Oct 2022
Externally publishedYes

Keywords

  • Bistable
  • Broadband
  • Spherical magnet
  • Vibration energy harvester

Fingerprint

Dive into the research topics of 'A bistable vibration energy harvester with spherical moving magnets: Theoretical modeling and experimental validation'. Together they form a unique fingerprint.

Cite this