Misconceptions in Piezoelectric Energy-Harvesting System Development †
Abstract
:- (1)
- Although the electromechanical coupling factor k is the smallest among various piezo-device configurations, the majority of researchers primarily use the ‘unimorph’ design. Why?
- (2)
- Although the typical noise vibration is in a much lower frequency range, the researchers measure the amplified resonance response (even at a frequency much higher than 1 kHz) and report these ‘unrealistically’ harvested electric energy values. Why?
- (3)
- Although the harvested energy is much lower than 1 mW, which is lower than the required electric energy to operate a typical energy-harvesting electric circuit with a direct current/direct current (DC/DC) converter (typically around 2–3 mW), researchers report the result as an energy ‘harvesting’ system. Does this situation mean actually energy ‘losing’? Why?
- (4)
- Few papers have reported successive energy flow or exact efficiency from the input mechanical energy to the final electric energy in a rechargeable battery via the piezoelectric transducer step by step. Why?
Supplementary Materials
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Uchino, K. Misconceptions in Piezoelectric Energy-Harvesting System Development. Eng. Proc. 2021, 4, 1. https://doi.org/10.3390/Micromachines2021-09570
Uchino K. Misconceptions in Piezoelectric Energy-Harvesting System Development. Engineering Proceedings. 2021; 4(1):1. https://doi.org/10.3390/Micromachines2021-09570
Chicago/Turabian StyleUchino, Kenji. 2021. "Misconceptions in Piezoelectric Energy-Harvesting System Development" Engineering Proceedings 4, no. 1: 1. https://doi.org/10.3390/Micromachines2021-09570