An Equivalent Circuit Model and Energy Extraction Technique of a Magnetostrictive Energy Harvester

2016 ◽  
Vol 26 (4) ◽  
pp. 1-6 ◽  
Author(s):  
Shuying Cao ◽  
Song Yang ◽  
Jiaju Zheng ◽  
Luyu Zhang ◽  
Bowen Wang
Keyword(s):  
Equivalent Circuit ◽  
Energy Harvester ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Extraction Technique ◽  
Energy Extraction

scholarly journals Improved Interface Circuit for Enhancing the Power Output of a Vibration-Threshold-Triggered Piezoelectric Energy Harvester

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3830
Author(s):  
Jiqiang Liu ◽  
Junjie Yang ◽  
Ruofeng Han ◽  
Qisheng He ◽  
Dacheng Xu ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Piezoelectric Material ◽  
Output Power ◽  
Energy Harvester ◽  
Equivalent Circuit Model ◽  
Stage Structure ◽  
Circuit Model ◽  
Interface Circuit ◽  
Piezoelectric Energy ◽  
Vibration Threshold

The vibration-threshold-triggered piezoelectric energy harvester is a new type of piezoelectric energy harvester with a two-stage structure, which can generate electricity in a low frequency environment and recognize vibration intensity at the same time. In this study, a theoretical model of a vibration-threshold-triggered energy harvester was examined, and an equivalent circuit model of the energy harvester was obtained. Then, an interface circuit was proposed that can significantly improve the output power of the energy harvester. The interface circuit achieved impedance matching with the piezoelectric material to maximize the energy collected from the energy harvester. First, we calculated and analyzed the impedance characteristics of the energy harvester, based on the equivalent circuit model. It was found that because the piezoelectric material is in resonance as the energy harvester is in operation, the corresponding impedance is almost resistance. Therefore, a resistance-matching strategy was proposed. Last, we proposed an interface circuit with adjustable input impedance to achieve resistance matching. The experimental results show that the proposed interface circuit can increase the output power of the energy harvester by 48.1–55.7% over that achieved with the standard interface circuit.

SPICE Equivalent Circuit Model of Electrostatic Energy Harvester including Electrostatic Force

2016 ◽  
Vol 136 (8) ◽  
pp. 323-329
Author(s):  
Koji Sonoda ◽  
Keidai Minami ◽  
Naoki Miwatani ◽  
Kensuke Kanda ◽  
Takayuki Fujita ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Energy Harvester ◽  
Electrostatic Force ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Electrostatic Energy

Equivalent Circuit Simulation Model of Cantilevered Piezoelectric Bimorph Energy Harvester

2011 ◽  
Vol 148-149 ◽  
pp. 245-249
Author(s):  
Hong Yan Wang ◽  
Xiao Biao Shan ◽  
Tao Xie
Keyword(s):  
Simulation Model ◽  
Equivalent Circuit ◽  
Power Output ◽  
Energy Harvester ◽  
Circuit Simulation ◽  
Electrical Power ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Piezoelectric Bimorph ◽  
Element Analysis

This paper presented an equivalent circuit simulation model of the cantilevered piezoelectric bimorph energy harvester for predicting the electrical power output of the energy harvester. The alternating voltage in the equivalent circuit model is identified from FE transducer model and the parameters of the resistance, capacitance and inductance in the equivalent circuit model are identified from FE actuator model. To valid the equivalent circuit simulation model, the power output values are compared with those obtained from the coupled piezoelectric-circuit finite element analysis. The results demonstrate the accuracy of the equivalent circuit simulation model.

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