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Article

An Electromagnetic Vibration Energy Harvester with a Tunable Mass Moment of Inertia

1
Mechanical Design and Production Department, Faculty of Engineering, Cairo University, Giza 12613, Egypt
2
Mechanical Engineering Department, American University in Cairo, New Cairo 11835, Egypt
*
Author to whom correspondence should be addressed.
Current address: School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, UK.
Sensors 2021, 21(16), 5611; https://doi.org/10.3390/s21165611
Received: 3 August 2021 / Revised: 18 August 2021 / Accepted: 18 August 2021 / Published: 20 August 2021
(This article belongs to the Section Electronic Sensors)
This paper presents a vibration-based electromagnetic energy harvester whose resonance frequency can be adjusted to match that of the excitation. Frequency adjustment is attained by controlling a rotatable arm, with tuning masses, at the tip of a cantilever-type energy harvester, thereby changing the effective mass moment of inertia of the system. The rotatable arm is mounted on a servomotor that is autonomously controlled through a microcontroller and a photo sensor to keep the device at resonance for maximum power generation. A mathematical model is developed to predict the system response for different design parameters and to estimate the generated power. The system is investigated analytically by a distributed-parameter model to study the natural frequency variation and dynamic response. The analytical model is verified experimentally where the frequency is tuned from 8 to 10.25 Hz. A parametric study is performed to study the effect of each parameter on the system behavior. View Full-Text
Keywords: variable inertia; energy harvesting; frequency tuning; self-tuning variable inertia; energy harvesting; frequency tuning; self-tuning
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MDPI and ACS Style

Ibrahim, P.; Arafa, M.; Anis, Y. An Electromagnetic Vibration Energy Harvester with a Tunable Mass Moment of Inertia. Sensors 2021, 21, 5611. https://doi.org/10.3390/s21165611

AMA Style

Ibrahim P, Arafa M, Anis Y. An Electromagnetic Vibration Energy Harvester with a Tunable Mass Moment of Inertia. Sensors. 2021; 21(16):5611. https://doi.org/10.3390/s21165611

Chicago/Turabian Style

Ibrahim, Peter, Mustafa Arafa, and Yasser Anis. 2021. "An Electromagnetic Vibration Energy Harvester with a Tunable Mass Moment of Inertia" Sensors 21, no. 16: 5611. https://doi.org/10.3390/s21165611

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