Abstract
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.
Highlights
Piezoelectric energy harvesting has drawn great attention in recent years due to its huge potentials in applications for wireless and self-powered devices [1,2,3,4,5,6,7,8,9]
We propose a new piezoelectric energy harvester with a high frequency ultrasonic vibration source, which is a specially designed coupler used to connect a high-power ultrasonic
The relation piezoelectric energy harvester is represented by using a constant charge Q source between the charge Q and current I is shown in the figure
Summary
Piezoelectric energy harvesting has drawn great attention in recent years due to its huge potentials in applications for wireless and self-powered devices [1,2,3,4,5,6,7,8,9]. Practice, there is always vibration leakage at found that the nodal position has been used for an energy harvester, the performance the nodal position due to various reasons, such as imperfect design, frequency change, of the cutting transducer is almost not affected. This is proved as shown, which is the non‐ideal dimensions, and mounting problems. The spectrum is clean, sharp, and with no random noises It implies that the harvester only scavenges the energy leakage, not affecting or deteriorating the performance of the cutting transducer.
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