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Piezoelectric Energy Harvesting with an Ultrasonic Vibration Source

by Tao Li 1,2,* and Pooi See Lee 1,2
1
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
2
Singapore-HUJ Alliance for Research and Enterprise (SHARE), Nanomaterials for Energy and Water Nexus (NEW), Campus for Research Excellence and Technological Enterprise (CREATE), Singapore 138602, Singapore
*
Author to whom correspondence should be addressed.
Actuators 2019, 8(1), 8; https://doi.org/10.3390/act8010008
Received: 10 December 2018 / Revised: 4 January 2019 / Accepted: 8 January 2019 / Published: 11 January 2019
A piezoelectric energy harvester was developed in this paper. It is actuated by the vibration leakage from the nodal position of a high-power ultrasonic cutting transducer. The harvester was excited at a low displacement amplitude (0.73 µmpp). However, its operation frequency is quite high and reaches the ultrasonic range (24.4 kHz). Compared with another low frequency harvester (66 Hz), both theoretical and experimental results proved that the advantages of this high frequency harvester include (i) high current generation capability (up to 20 mApp compared to 1.3 mApp of the 66 Hz transducer) and (ii) low impedance matching resistance (500 Ω in contrast to 50 kΩ of the 66 Hz transducer). This energy harvester can be applied either in sensing, or vibration controlling, or simply energy harvesting in a high-power ultrasonic system. View Full-Text
Keywords: piezoelectric; ultrasonic; energy harvesting; vibration; actuator piezoelectric; ultrasonic; energy harvesting; vibration; actuator
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Li, T.; Lee, P.S. Piezoelectric Energy Harvesting with an Ultrasonic Vibration Source. Actuators 2019, 8, 8.

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