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

doi:10.1016/j.sna.2022.113782

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 journal › Article › peer-review

12 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 language	English
Article number	113782
Journal	Sensors and Actuators A: Physical
Volume	345
DOIs	https://doi.org/10.1016/j.sna.2022.113782
Publication status	Published - 1 Oct 2022
Externally published	Yes

Keywords

Bistable
Broadband
Spherical magnet
Vibration energy harvester

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10.1016/j.sna.2022.113782

Cite this

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title = "A bistable vibration energy harvester with spherical moving magnets: Theoretical modeling and experimental validation",

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.",

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AU - Tu, Dilong

AU - Zhang, Yuan

AU - Zhu, Lei

AU - Fu, Hailing

AU - Qin, Yong

AU - Liu, Mengzhou

AU - Ding, Ao

PY - 2022/10/1

Y1 - 2022/10/1

N2 - 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.

AB - 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.

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

Abstract

Keywords

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