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Nonlinear energy harvesting from vibratory disc-shaped piezoelectric laminates

Theoretical & Applied Mechanics Letters 2020年第4期10卷 253-261页

作者： Abdolreza Pasharavesh Reza Moheimani Hamid Dalir School of Mechanical Engineering Purdue UniversityWest LafayetteIN 47907USA Department of Mechanical and energy Engineering Purdue School of Engineering and TechnologyIndianapolisIN 46202USA

Implementing resonators with geometrical nonlinearities in vibrational energy harvesting systems leads to considerable enhancement of their operational bandwidths. This advantage of nonlinear devices in comparison to their linear counterparts is much more obvious especially at small-scale where transition to nonlinear regime of vibration occurs at moderately small amplitudes of the base excitation. In this paper the nonlinear behavior of a disc-shaped piezoelectric laminated harvester considering midplane-stretching effect is investigated. Extended Hamilton’s principle is exploited to extract electromechanically coupled governing partial differential equations of the system. The equations are firstly order-reduced and then analytically solved implementing perturbation method of multiple scales. A nonlinear finite element method(FEM) simulation of the system is performed additionally for the purpose of verification which shows agreement with the analytical solution to a large extent. The frequency response of the output power at primary resonance of the harvester is calculated to investigate the effect of nonlinearity on the system performance. Effect of various parameters including mechanical quality factor, external load impedance and base excitation amplitude on the behavior of the system are studied. Findings indicate that in the nonlinear regime both output power and operational bandwidth of the harvester will be enhanced by increasing the mechanical quality factor which can be considered as a significant advantage in comparison to linear harvesters in which these two factors vary in opposite ways as quality factor is changed.

关键词： Nonlinear resonator Coupled electromechanical modeling energy harvesting Piezoelectric laminate

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ANALYSIS OF PIEZOELECTRIC energy harvesting DEVICE WITH ADJUSTABLE RESONANCE FREQUENCY

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Journal of Electronics(China) 2012年第3期29卷 310-318页

作者： Jiang Lei Li Yuejuan Marvin Cheng School of Mechanical Electronic & Information Engineering China University of Mining & Technology Beijing 100083 China Department of Mechanical and Aerospace Engineering West Virginia University Morgantown WV 26505 U.S.A

This paper presents an analytic method that adjusts resonance frequency of a piezoelectric vibration energy harvester. A mathematical model that estimates resonance frequency of cantilever is also proposed. Through moving an attached mass and changing its weight on the cantilever beam, resonance frequency of adopted piezoelectric device can be adjusted to match the frequency of ambient vibration sources, which is critical in order to harvest maximum amount of energy. The theoretical results are validated by experiments that move different masses along experimental cantilever beams. The results demonstrate that resonance frequency can be adjusted by an attached mass located at different positions on the cantilever beam. Different combinations of operational conditions that harvest maximum amount of energy are also discussed in this paper.

关键词： Piezoelectric energy harvesting Resonance frequency

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energy harvesting by two magnetopiezoelastic oscillators with mistuning

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Theoretical & Applied Mechanics Letters 2012年第4期2卷 51-55页

作者： Grzegorz Litak Michael I.Friswell Cedrick A.Kitio Kwuimy Sondipon Adhikari Marek Borowiec Department of Applied Mechanics Technical University of LublinLublin PL-20-618Poland School of Engineering Swansea UniversitySingleton ParkSwansea SA2 8PPUK Center for Nonlinear Dynamics and Control Department of Mechanical EngineeringVillanova University800 Lancaster AvenueVillanovaPA 19085USA.

We examine an energy harvesting system of two magnetopiezoelastic oscillators coupled by electric circuit and driven by harmonic excitation. We focus on the effects of synchronization and escape from a single potential well. In the system with relative mistuning in the stiffness of the har- vesting oscillators, we show the dependence of the voltage output for different excitation frequencies.

关键词： energy harvesting piezoelectric nonlinear vibrations

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energy harvesting Based on Magnetic Dispersion for Three-Phase Power System

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energy and Power Engineering 2013年第3期5卷 20-23页

作者： Tarcisio Oliveira de Moraes Júnior Yuri Percy Molina Rodriguez Ewerton Cleudson de Sousa Melo Maraiza Prescila dos Santos Cleonilson Protásio de Souza Federal Institute of Paraíba-IFPB CajazeirasBrazil Department of Electrical Engineering Federal University of Paraíba-UFPBJoao PessoaBrazil

This paper presents a comparative study on Magnetic-Dispersion based energy harvesting Systems (MD-EHS) on electrical conductors that supply power for a three-phase AC motor. It introduces two MD-EHS which are based on magnetic cores of different material, named, nanocrystalline, ferrite and iron powder. The first one consists of harvesting energy from magnetic flux through three symmetrical magnetic cores installed on each power conductors of a three-phase AC motor. The second one consists of a single magnetic core for harvesting energy from magnetic flux of only one of these conductors. Both ones have an AC/DC converter and a variable resistor based load. Experimental results have agreed with the theoretical analysis and show that the first proposed MD-EHS is capable of supplying 14 times more energy than the second MD-EHS, considering nanocrystalline cores and phase current of 3 A, and 7.5 times more energy, considering ferrite cores and phase current of 9 A. Such energy can be applied to various low-power devices, especially in wireless sensor network.

关键词： energy harvesting Magnetic Dispersion Magnetic Cores

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energy harvesting from Human Body Motion

Energy Harvesting from Human Body Motion

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第11届粤港机械电子工程技术与应用研讨会

作者： XIE Longhan~(1,2),DU Ruxu~(1,2) 1.School of Mechanical & Automotive Engineering,South China University of Technology, Guangzhou,510640,China 2.Institute of Precision Engineering,the Chinese University of Hong Kong, Hong Kong SAR,China

＜正＞It is known that human body contains rich chemical energy,part of which is converted to mechanical energy up to 200W when human in ***,human body is an ideal sustainable energy resource for portable electronic *** this paper,the motion pattern of human movement in normal walking is studied,showing that the arm swinging,knee motion and hip motion can be approximated as sinusoidal functions with relatively large *** order to harvest such human motion,several methods are investigated,including pendulum,translational spring and torsion spring,which can be mathematically formatted as second order differential equation with damped *** paper also gives a design to harvest human motion:it animates the automatic winding system of mechanical watch movement to acquire the kinetic energy and converts kinetic energy to electricity based on electromagnetic induction. Simulation studies are included.

关键词： energy harvesting Human motion Kinematics Numerical Analysis

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Highly stretchable kirigami-patterned nanofiber-based nanogenerators for harvesting human motion energy to power wearable electronics

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Materials Futures 2024年第2期3卷 131-140页

作者： Chuan Ning Shengxin Xiang Xiupeng Sun Xinya Zhao Chuanhui Wei Lele Li Guoqiang Zheng Kai Dong College of Materials Science and Engineering Key Laboratory of Material Processing and Mold(Ministry of Education)Zhengzhou UniversityZhengzhou 450001People’s Republic of China Key Laboratory of Materials Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001People’s Republic of China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400People’s Republic of China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

Wearable electronics are advancing towards miniaturization and ***,traditional energy supply methods have largely hindered their *** effective solution to this problem is to convert human mechanical energy into electricity to power wearable electronic ***,it is greatly attractive to design flexible,foldable and even stretchable energy harvesting ***,we use the electrospinning and kirigami approach to develop a type of highly stretchable kirigami-patterned nanofiber-based triboelectric nanogenerator(K-TENG).Due to its innovative structural design,the K-TENG can achieve a tensile strain of 220%,independent of the tensile properties of the material *** a person swings their arms,the K-TENG fixed to the clothing can convert mechanical energy from human movement into electrical *** produced electricity can directly drive 50 LED lights and a digital watch,or be stored in a lithium battery to charge the smartwatch and smartphone,*** study employs a new method to fabricate a stretchable triboelectric nanogenerator and demonstrates its promising applications in wearable power technology.

关键词： stretchable triboelectric nanogenerators kirigami energy harvesting

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Giant energy harvesting potential in(100)-oriented 0.68PbMg_(1/3)Nb_(2/3)O_(3)-0.32PbTiO_(3)with Pb(Zr_(0.3)Ti_(0.7))O_(3)/PbO_(x)buffer layer and(001)-oriented 0.67PbMg_(1/3)Nb_(2/3)O_(3)-0.33PbTiO_(3)thin films

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Journal of Advanced Dielectrics 2014年第4期4卷 18-23页

作者： Gaurav Vats Himmat Singh Kushwaha Rahul Vaish Niyaz Ahamad Madhar Mohammed Shahabuddin Jafar M.Parakkandy Khalid Mujasam Batoo School of Engineering Indian Institute of Technology Mandi Himachal Pradesh 175001 India Department of Physics and Astronomy P.O.Box No.2455 College of SciencesKing Saud University Riyadh 11451Kingdom of Saudi Arabia King Abdullah Institute of Nanotechnology P.O.Box No.2455 King Saud UniversityRiyadh 11451 Kingdom of Saudi Arabia

This work emphasis on the competence of(100)-oriented PMN–PT buffer layered(0.68PbMg_(1/3)Nb_(2/3)O_(3)–0.32PbTiO_(3)with Pb(Zr_(0.3)Ti_(0.7))O_(3)/PbO_(x)buffer layer)and(001)-oriented PMN–PT(0.67PbMg_(1/3)Nb_(2/3)O_(3)–0.33PbTiO_(3))for low grade thermal energy harvesting using Olsen *** analysis(based on well-reported experiments in literature)reveals that these films show colossal energy harnessing *** the films are found to have maximum harnessable energy densities(PMN–PT buffer layered:8 MJ/m^(3);PMN–PT:6.5 MJ/m^(3))in identical ambient conditions of 30–150℃and 0–600 kV/*** energy harnessing plausibility is found to be nearly five times higher than the previously reported values to date.

关键词： Giant energy harvesting thin films Olsen cycle

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A Comparison Study of Rectifier Designs for 2.45 GHz EM energy harvesting

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energy and Power Engineering 2021年第2期13卷 81-89页

作者： Sittilin Salleh Mohd Azman Zakariya Razak Mohd Ali Lee Faculty of Engineering Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia Department of Electrical and Electronics Engineering Universiti Teknologi PETRONAS Malaysia

energy harvesting is a rapidly growing area in many scientific and engineering-related fields due to the demand for many applications. This paper focuses on the design and simulation of the voltage doubler rectifier circuit at 2.45 GHz operating frequency. The design of a rectifier is optimized based on the use of Schottky diode HSMS 286 B due to its low forward voltage at this frequency. 2 stages of the Schottky diode voltage doublers circuit are designed and simulated in this paper. The shunt capacitor and optimal load resistance are also introduced in the course to reduce signal loss. A multi-stage rectifier is used to produce maximum power conversion from AC to DC. The simulated results present that the maximum output voltage of 6.651 V with an input power of 25 dBm is produced, which presents a maximum power conversion efficiency of 73.13%, which applicable in small device applications.

关键词： energy harvesting Rectifier Schottky Diode Power Conversion Efficiency

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Design of a Rectenna in 2.45 GHz Band Frequency for energy harvesting

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energy and Power Engineering 2021年第9期13卷 333-342页

作者： Ognadon Assogba Abdoul Karim Mbodji Salick Diagne Abdou Karim Diallo Section Physique Appliquée UFR des Sciences Appliquées et de Technologies (SAT) Université Gaston Berger de Saint-Louis Sénégal

There are several sources of energy recovery in the ambient environment. The radiofrequency energy harvesting system is used to harvest the electromagnetic energy in the air by processing energy sources to charge low-power electronic devices. Rectenna termed as a rectifying antenna is a device that is used to convert electromagnetic waves in the air into direct electric current. In this work, we have designed firstly the patch antenna with a small size printed on the FR4 substrate (40 mm × 47.5 mm × 1.6 mm) and then the rectifier circuit. This rectenna is capable of working at a frequency range of 2.45 GHz. The antenna was designed using High Frequency Structure Simulator (HFSS) 13.0 software with the result of working frequency of 2.453 GHz, S11 (Return Loss) -52 dB, Voltage Standing Wave Ratio (VSWR) 1.036, gain 3.48 dB and bandwidth 150 MHz. The efficiency of rectifier design on Advanced Design System (ADS) 2011 software is 54% at the input power of 0 dBm at 2.45 GHz. The resulting system is capable of producing electrical energy to power low-power electronic equipment at a DC voltage of 732 mV.

关键词： Efficiency energy harvesting Radiofrequency Rectenna

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ANALYSIS OF PIEZOELECTRIC energy harvesting DEVICE WITH ADJUSTABLE RESONANCE FREQUENCY

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Journal of Electronics(China) 2012年第Z2期 310-318页

作者： Jiang Lei Li Yuejuan* Marvin Cheng* (School of Mechanical Electronic & Information Engineering, China University of Mining & Technology, Beijing 100083, China) *(Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV 26505, U.S.A)

关键词： Piezoelectric energy harvesting Resonance frequency

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