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

2015 ◽  
Author(s):  
A. V. Korshunov ◽  
P. S. Volobuev
Keyword(s):  
Low Power ◽  
Equivalent Circuit ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Power Devices ◽  
Ultra Low Power ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Ultra Low Power Devices

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.

scholarly journals Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5808
Author(s):  
Ondrej Rubes ◽  
Zdenek Machu ◽  
Oldrich Sevecek ◽  
Zdenek Hadas
Keyword(s):  
Energy Harvester ◽  
Lead Free ◽  
Vibration Energy Harvester ◽  
Ultra Low Power ◽  
Energy Harvesters ◽  
Layered Architecture ◽  
Piezoelectric Energy ◽  
Wide Range ◽  
Ultra Low Power Devices ◽  
Novel Design

Kinetic piezoelectric energy harvesters are used to power up ultra-low power devices without batteries as an alternative and eco-friendly source of energy. This paper deals with a novel design of a lead-free multilayer energy harvester based on BaTiO3 ceramics. This material is very brittle and might be cracked in small amplitudes of oscillations. However, the main aim of our development is the design of a crack protective layered architecture that protects an energy harvesting device in very high amplitudes of oscillations. This architecture is described and optimized for chosen geometry and the resulted one degree of freedom coupled electromechanical model is derived. This model could be used in bistable configuration and the model is extended about the nonlinear stiffness produced by auxiliary magnets. The complex bistable vibration energy harvester is simulated to predict operation in a wide range of frequency excitation. It should demonstrate typical operation of designed beam and a stress intensity factor was calculated for layers. The whole system, without presence of cracks, was simulated with an excitation acceleration of amplitude up to 1g. The maximal obtained power was around 2 mW at the frequency around 40 Hz with a maximal tip displacement 7.5 mm. The maximal operating amplitude of this novel design was calculated around 10 mm which is 10-times higher than without protective layers.

scholarly journals Efficient Scalable Digit-Serial Inverter Over GF( $2^{m}$ ) for Ultra-Low Power Devices

IEEE Access ◽  
2016 ◽  
Vol 4 ◽  
pp. 9758-9763 ◽  
Author(s):  
Atef Ibrahim ◽  
Turki F. Al-Somani ◽  
Fayez Gebali
Keyword(s):  
Low Power ◽  
Power Devices ◽  
Ultra Low Power ◽  
Ultra Low Power Devices

Ultra-Low Power Devices by Taking Advantages of Atom Switches with Polymer Solid-electrolyte

2012 ◽  
Author(s):  
H. Hada ◽  
T. Sakamoto ◽  
M. Tada ◽  
N. Banno ◽  
M. Miyamura ◽  
...  
Keyword(s):  
Low Power ◽  
Solid Electrolyte ◽  
Power Devices ◽  
Ultra Low Power ◽  
Ultra Low Power Devices
Sign in / Sign up

Export Citation Format

Share Document