Performance Measurement of Piezoelectric Energy Harvester with Permanent Magnet Assembly for Wearable Devices

Mohd Tahir, Mohamad Safiddin and Mohamad Hanif, Noor Hazrin Hany and Che Kassim, Muhammad Hafizuddin (2021) Performance Measurement of Piezoelectric Energy Harvester with Permanent Magnet Assembly for Wearable Devices. In: 2021 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 17-20 May 2021, Glasgow, Scotland, United Kingdom (Virtual).

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Abstract

Vibration-based energy harvester, such as piezoelectric energy harvesters (PEH), can adequately convert kinetic energy from ambient vibration to electrical energy, especially in micro-scale energy harvesting. However, these piezoelectric energy harvesters only produce desirable power output when the piezoelectric beam was vibrated at its resonance, which is usually above 50 Hz. This is considerably high for wearable devices applications, which generally operate at a vibration of less than 30 Hz. This project investigates the performance of a piezoelectric energy harvester that utilizes the magnetic interaction of its proof mass to adjust its resonant frequency. By mounting permanent magnets (NdFeB) at the tip of the beam as proof mass and placing other permanent magnets at the top and bottom of the proof mass at various distances and polarity, attractive magnetic interaction has overall best performances compared to without magnetic and repulsion magnetic interaction, which reduced the resonant frequency to 15 Hz. Without compromising the generated voltage and power output, this work has shown that energy could be harvested from a low vibration input source, that is deemed useful for powering wearable devices.

Item Type:	Conference or Workshop Item (Plenary Papers)
Uncontrolled Keywords:	energy harvesting, piezoelectric, permanent magnet
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechatronics Engineering Kulliyyah of Engineering
Depositing User:	DR Noor Hazrin Hany Mohamad Hanif
Date Deposited:	07 Jul 2021 14:49
Last Modified:	09 Sep 2021 14:29
URI:	http://irep.iium.edu.my/id/eprint/90635

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