Exploring of equivalent circuit model of piezoelectric energy harvesters for ultra low-power devices

In renewable energy technology development, piezoelectric material has electro-mechanical converted capability and the advantages of simple construction and compact size, it has potential development since the environment vibration can be transferred into an electrical energy in daily harvesting applications. To improve the electro-mechanical converted efficiency of a piezoelectric harvester at low-frequency environment, a free vibration type of piezoelectric cantilever harvesting structure was proposed, which can generate a resonant oscillation by releasing an initial deformed displacement, and was uninfluenced from the effects of external environment. To analyze the harvesting behaviors, an equivalent circuit with voltage source was provided, and the parameters in theoretical model can be determined by the dimensions of the piezoelectric unimorph plate and its initial deformation. From the comparison of measurement and simulation, it reveals a significant efficient theoretical model where 8% error occurrence for storage energy was found. Finally, the proposed free-vibration generation method was developed in a piezoelectric harvesting floor design, which can transfer human walking motion into electric energy, and store in an external storage capacitor. From the testing result, one time of footstep motion can cause the charging energy in a 33 μF of storage capacitor achieve to 0.278 mJ, which was larger than the driven power of the wireless transmitter module, and then the wireless transmitter can be driven to send a RF signal without external power supply. Therefore, the designed piezoelectric harvesting floor has potential development to locate the user’s current position, which can provide users with future appropriate service for intelligent building application.

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“…Figure 5. Complete equivalent circuit of piezoelectric cantilever beam structure converted from its electromechanical model [30].…”

Section: Electric Generating Analysismentioning

confidence: 99%

The Analysis and Design of a High Efficiency Piezoelectric Harvesting Floor with Impacting Force Mechanism

Wang

Tsai

2021

Crystals

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“…On the other hand, due to the engagement of more advanced conditioning circuits [35][36][37][38][39], or by modifying the shape of the cantilevers [40][41], ultra-low power applications are rapidly spreading.…”

Section: Interfacing Circuitmentioning

confidence: 99%

Piezoelectric Rainfall Energy Harvester Performance by an Advanced Arduino-Based Measuring System

Acciari

Caruso

Miceli

et al. 2018

IEEE Trans. on Ind. Applicat.

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This paper presents the performances of rainfall energy harvesting through the use of a piezoelectric transducer and an Arduino-based measuring system. Different studies agree on the possibility of generating electricity from rainfall, but to date, a study on measuring the quantity of energy produced during rainfall is still missing. The present study begins with results obtained from laboratory researchers using piezoelectric transducers and oscilloscopes, finalized to measure the energy produced from a single raindrop, and concludes with an ad hoc Arduino-based measuring system, aimed to measure the actual amount of electrical energy produced by a piezoelectric transducer that is exposed to rainfall of variable durations.

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Output Performance of Piezoelectric Vibration Energy Harvester Considering Inductive Loads

Huang

Zhou

2022

Proceedings of the Eighth Asia International Symposium on Mechatronics

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Exploring of equivalent circuit model of piezoelectric energy harvesters for ultra low-power devices

Cited by 4 publications

References 8 publications

The Analysis and Design of a High Efficiency Piezoelectric Harvesting Floor with Impacting Force Mechanism

The Analysis and Design of a High Efficiency Piezoelectric Harvesting Floor with Impacting Force Mechanism

Piezoelectric Rainfall Energy Harvester Performance by an Advanced Arduino-Based Measuring System

Output Performance of Piezoelectric Vibration Energy Harvester Considering Inductive Loads

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