Effects of complex motion in a new cantilever-beam nonlinear electromagnetic vibration energy harvester

Jagieła, Mariusz; Kulik, Marcin

doi:10.1109/isef.2017.8090778

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2021

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“…Abdelnaby and Arafa [8] proposed an electromagnetic EH capable of generating 0.14 mW from 5 Hz excitation frequency and 1.8 mm excitation amplitude. Other critical influences in energy harvesting using electromagnetic transductions include applications of cantilever beams [8][9][10], rotational mechanisms [11][12][13][14] and pendulum-based structures [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Low Frequency Magnet-Tethered Vibration Energy Harvester for Self-Powered Sensing

Masabi

Theodossiades

2021

2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers)

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Wireless sensors face challenges regarding power supply and maintenance when batteries are used. To provide an effective solution, this paper presents a bistable energy harvester capable of exploiting ultra-low frequency vibration to energize low-powered devices. The energy harvester uses rotary-translational motion of a spherical rolling magnet contained inside a frame, with two tethering magnets below the rolling magnet's path to enable two stable positions. To examine the performance of the design, a prototype was fabricated and tested under varying excitation conditions and external loads. An output of 7.1 mW at 750 Ω was effectively determined. A power management circuit is integrated with the energy harvester; the harvester can charge a 470 µF capacitor to 3.4 V within 82 s at 0.7 g and 2 Hz.

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