Analysis of Output Voltages for Piezoelectric Cantilever Generator Based on Vibration Energy Harvesting

2007 ◽  
Author(s):  
Xiaozhen Du ◽  
Jinkui Chu ◽  
Shuanghui Wei
Keyword(s):  
Energy Harvesting ◽  
Open Circuit ◽  
Vibration Energy ◽  
Ambient Vibrations ◽  
Preference Structure ◽  
Vibration Energy Harvesting ◽  
Power Sources ◽  
Piezoelectric Cantilever ◽  
Set Up ◽  
Open Circuit Voltages

Low level mechanical vibrations exist in many environments. The primary frequencies can spread about decades and the acceleration amplitudes of the ambient vibrations can be in the range from about 1 to 10 m/s2. Vibration energy harvesting is the promising electric power sources for micro-electric-mechanical system (MEMS). The piezoelectric cantilever model has been proved as a preference structure for vibration energy harvesting. An efficacious computational model of the vibration energy harvesting is established to predict the output of open-circuit voltages in this paper. Meanwhile, a prototype piezoelectric cantilever generator is set up. The calculated results were compared well with that of tests.

scholarly journals Comprehensive Analysis of the Energy Harvesting Performance of a Fe-Ga Based Cantilever Harvester in Free Excitation and Base Excitation Mode

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3412
Author(s):  
Liu ◽  
Cong ◽  
Zhao ◽  
Ma
Keyword(s):  
Energy Harvesting ◽  
Open Circuit ◽  
Research Field ◽  
Vibration Energy ◽  
Induction Effect ◽  
Base Excitation ◽  
Vibration Energy Harvesting ◽  
In Series ◽  
Self Powered ◽  
Coupling Characteristics

Vibration energy harvesting attempts to generate electricity through recycling the discarded vibration energy that is usually lost or dissipated, and represents an alternative to traditional batteries and may even lead to reliable self-powered autonomous electronic devices. Energy harvesting based on magnetostrictive materials, which takes advantage of the coupling characteristics of the Villari effect and the Faraday electromagnetic induction effect, is a recent research field of great interest. Aiming to develop a new type of magnetostrictive energy harvester using Fe-Ga alloy, which is suitable for harvesting the vibration energy from base excitations and free excitations, a Fe-Ga based cantilever harvester was proposed. The energy harvesting performance of the harvester prototype, including its resonance characteristics, open-circuit output voltage-frequency response and amplitude characteristic under base excitation, influence of external resistance, energy harvesting performance under free excitation, the function of pre-magnetization and so on was studied systematically and carefully by experiments. In terms of the volume power density, the harvester prototype without pre-magnetized magnet when in series with the optimal resistor load displays a value of 2.653 mW/cm3. The average conversion efficiency without a pre-magnetic field is about 17.7% when it is in series with a 200 resistance. The energy harvesting and converting capability can therefore be improved greatly once the Fe-Ga beam is highly pre-magnetized. The prototype successfully lit up multi-LEDs and digital display tubes, which validates the sustainable power generation capacity of the fabricated prototype.

A Broadband Frequency Piezoelectric Vibration Energy Harvester

2011 ◽  
Vol 483 ◽  
pp. 626-630 ◽  
Author(s):  
Hua An Ma ◽  
Jing Quan Liu ◽  
Gang Tang ◽  
Chun Sheng Yang ◽  
Yi Gui Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Frequency Band ◽  
Energy Harvester ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Vibration Energy Harvester ◽  
Piezoelectric Cantilever ◽  
Working Frequency ◽  
Piezoelectric Vibration Energy Harvester ◽  
Piezoelectric Vibration

As the low-power wireless sensor components and the development of micro electromechanical systems, long-term supply of components is a major obstacle of their development. One of solutions to this problem is based on the environmental energy collection of piezoelectric vibration energy harvesting. Currently, frequency band of piezoelectric vibration energy harvester is narrow and the frequency is high, which is not fit for the vibration energy acquisition in the natural environment. A piezoelectric vibration energy harvester with lower working frequency and broader band is designed and a test system to analyze the harvester is presented in this paper. The traditional mass is replaced by a permanent magnet in this paper, While other two permanent magnets are also placed on the upper and above of the piezoelectric cantilever. Experiments showed, under the 0.5g acceleration, compared with the traditional non-magnetic piezoelectric vibration energy harvesting, a piezoelectric cantilever (length 40mm, width 8mm, thickness 0.8mm) has a peak-peak voltage of 32.4V, effectively enlarges working frequency band from 67HZ-105HZ to 63HZ-108HZ.

Research on Piezoelectric Generators for Vibration Energy Harvesting

2015 ◽  
Vol 757 ◽  
pp. 171-174
Author(s):  
Kai Zhou ◽  
Fang Xie ◽  
Yi Tao ◽  
Hai Xia Du
Keyword(s):  
Wireless Networks ◽  
Energy Harvesting ◽  
Low Frequency ◽  
Vibration Energy ◽  
Small Scale ◽  
Vibration Energy Harvesting ◽  
Low Frequency Vibration ◽  
Piezoelectric Cantilever ◽  
Study Results ◽  
Generation Capacity

Ambient energy harvesting has been in recent years the recurring object of a number of research efforts aimed at providing an autonomous solution to the powering of small scale electronic mobile devices. Among the different solutions, vibration energy harvesting has played a major role due to the almost universal presence of mechanical vibrations. In the paper, a piezoelectric cantilever device for harvesting the ambient low-frequency vibration energy is designed, and influences of its structure on output voltage and power generation capacity are studied also. The study results show that the piezoelectric cantilever can produce enough power energy which meets the operation requirements of sensors in wireless networks. It provides a method and corresponding theoretical basis for the harvesting of ambient low-frequency vibration energy and the design of self-supply devices for sensors in wireless networks.

scholarly journals Chaotic Dynamics-Based Analysis of Broadband Piezoelectric Vibration Energy Harvesting Enhanced by Using Nonlinearity

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Zhongsheng Chen ◽  
Bin Guo ◽  
Congcong Cheng ◽  
Hongwu Shi ◽  
Yongmin Yang
Keyword(s):  
Energy Harvesting ◽  
Chaotic Dynamics ◽  
State Space Model ◽  
Excitation Amplitude ◽  
Single Frequency ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Piezoelectric Cantilever ◽  
Harvesting Systems ◽  
Piezoelectric Vibration

Nonlinear magnetic forces are always used to enlarge resonant bandwidth of vibration energy harvesting systems with piezoelectric cantilever beams. However, how to determine properly the distance between two magnets is one of the key engineering problems. In this paper, the Melnikov theory is introduced to overcome it. Firstly, the Melnikov state-space model of the nonlinear piezoelectric vibration energy harvesting (PVEH) system is built. Based on it, chaotic dynamics mechanisms of achieving broadband PVEH by nonlinearity are exposed by potential function of the unperturbed nonlinear PVEH system. Then the corresponding Melnikov function of the nonlinear PVEH system is defined, based on which two Melnikov necessary conditions of determining the distance are obtained. Finally, numerical simulations are done to testify the theoretic results. The results demonstrate that the distance is closely related to the excitation amplitude and frequency once geometric and material parameters are fixed. Under a single-frequency excitation, the nonlinear PVEH system can generate a periodic vibration around a stable point, a large-amplitude vibration around two stable points, or a chaotic vibration. The proposed method is very valuable for optimally designing and utilizing nonlinear broadband PVEH devices in engineering applications.

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