A Wideband Magnetic Frequency Up‐Converter Energy Harvester

Fakeih, Esraa; Almansouri, Abdullah S.; Kosel, Jürgen; Younis, Mohammad I.; Salama, Khaled N.

doi:10.1002/adem.202001364

Cited by 8 publications

(4 citation statements)

References 35 publications

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“…This result is also one to two orders of magnitude higher than that of previously reported MMEC-EHs. [38][39][40][41] As mentioned above, the enhanced output voltage and output power of MMEC energy harvester could be ascribed to the relatively high piezoelectric charge coefficient e 33 and mechanical quality Q m in PMNN-PZT ceramic. In response to a discontinuous, low-frequency pulse force impact, a special structure design is also important to MMEC-EHs for producing As mentioned above, mechanical vibrations and magnetic fields in environments are often excited simultaneously.…”

Section: Pulse Force Stimulusmentioning

confidence: 92%

A PMNN‐PZT Piezoceramic Based Magneto‐Mechano‐Electric Coupled Energy Harvester

Yang

Cao

et al. 2022

Adv Funct Materials

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It is desired to obtain a piezoceramic with a high piezoelectric coefficient and low dielectric loss simultaneously for energy harvester application. Herein, it is reported that the 0.025Pb(Mn1/3Nb2/3)O3‐0.525Pb(Ni1/3Nb2/3)O3‐0.135PbZrO3‐0.315PbTiO3 (PMNN‐PZT) ceramic exhibits superior piezoelectric charge parameter e33 of 37.74 pC m−2 and low dielectric loss tanδ of 0.45%. Furthermore, a PMNN‐PZT ceramic‐based magneto‐mechano‐electric coupled energy harvester (MMEC‐EH) with a varying‐stiffness cantilever is designed and fabricated, which shows the strong self‐resonance effect in response to a random, transient impulse vibration or magnetic field stimulus. The investigations show that under a 0.6 s pulse vibration stimulus, the MMEC‐EH can tune itself into self‐resonance damping oscillation lasting for six seconds at its resonance frequency of 16 Hz, and the produced maximum power is 1.96 mWRMS. Under both weak magnetic field and force‐field dual‐stimulus (Hac = 0.5 Oe and a = 0.05 g), the generated power density is about 60 mWRMS Oe−2g−2cm−3, which is one to two orders of magnitude higher than those previously reported MMEC‐EHs. Finally, the MMEC‐EH is successfully demonstrated to power temperature/humidity sensors, indicating its potential for harvesting both weak vibration and magnetic field energy from environments for self‐powered sensor application.

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Section: Pulse Force Stimulusmentioning

confidence: 92%

A PMNN‐PZT Piezoceramic Based Magneto‐Mechano‐Electric Coupled Energy Harvester

Yang

Cao

et al. 2022

Adv Funct Materials

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“…To increase the efficiency of harvesting energy from low-frequency vibrations, the frequency up-converter has been investigated lately [ 36 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ]. Basically, the approach of the frequency up-converter is that the low-frequency sources induce high-frequency oscillations [ 51 ].…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Analysis of a Bistable Frequency Up-Converter Piezoelectric Energy Harvester

Atmeh

Ibrahim

Ramini³

2023

Micromachines

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Using energy harvesting to convert ambient vibrations efficiently to electrical energy has become a worthy concept in recent years. Nevertheless, the low frequencies of the ambient vibrations cannot be effectively converted to power using traditional harvesters. Therefore, a frequency up-conversion harvester is presented to convert the low-frequency vibrations to high-frequency vibrations utilizing magnetic coupling. The presented harvester consists of a low-frequency beam (LFB) and a high-frequency beam (HFB) with identical tip magnets facing each other at the same polarity. The HFB, fully covered by a piezoelectric strip, is utilized for voltage generation. The dynamic behavior of the system and the corresponding generated voltage signal has been investigated by modeling the system as a two-degrees-of-freedom (2DOF) lumped-parameter model. A threshold distance of 15 mm that divides the system into a monostable regime with a weak magnetic coupling and a bistable regime with a strong magnetic coupling was revealed in the static analysis of the system. Hardening and softening behaviors were reported at the low frequency range for the mono and bistable regimes, respectively. In addition, a combined nonlinear hardening and softening behavior was captured for low frequencies at the threshold distance. Furthermore, a 100% increment was achieved in the generated voltage at the threshold compared to the monostable regime, and the maximum generated voltage was found to be in the bistable regime. The simulated results were validated experimentally. Moreover, the effect of the external resistance was investigated, and a 2 M resistance was found to be optimal for maximizing the generated power. It was found that frequency up-converting based on magnetic nonlinearity can effectively scavenge energy from low-frequency external vibrations.

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“…Therefore, harvesting vibration energy from the ambient environment is an ideal solution for a sustainable power supply. (3) Currently, vibration energy harvesting mainly makes use of three common mechanisms: piezoelectric, (4,5) electrostatic, (6,7) and electromagnetic. (8,9) Electromagnetic vibration energy harvesters (EVEHs) have attracted extensive attention from researchers owing to their high output current, low internal resistance, and simple structure.…”

Section: Introductionmentioning

confidence: 99%

Diamagnetic-levitation-based Electromagnetic Energy Harvester for Ultralow-frequency Vibrations and Human Motions

Zhang¹,

Zhang²,

Feng³

et al. 2023

Sensors and Materials

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Converting ambient vibration energy into electrical energy is a potential technology for powering wireless sensor networks (WSNs). In this paper, an electromagnetic vibration energy harvester (EVEH) based on a diamagnetic levitation system is proposed for harvesting energy from ultralow-frequency, broadband vibration sources. In this design, a diamagnetic levitation structure is utilized to reduce the operating frequency, and mechanical impact is effectively introduced to broaden the working bandwidth. A simulation model of the energy harvester is built to illustrate the energy conversion process. The performance of the energy harvester is experimentally investigated under harmonic excitation with different acceleration levels and frequencies. At an acceleration of 1 g, a maximum peak-to-peak voltage of 370 mV is measured over a wide frequency range of 3-16 Hz, and the root mean square (RMS) output power at the optimal resistance is obtained as 26.7 μW at the excitation frequency of 6 Hz. In addition, the real-time characteristic of the proposed energy harvester is explored by harvesting energy from human motions such as hand shaking, stepping, and jumping. Compared with recent diamagnetic-levitation-based vibration energy harvesters, the harvester can be efficiently operated in an ultralow-frequency, random, and large-amplitude-vibration environment.

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A Wideband Magnetic Frequency Up‐Converter Energy Harvester

Cited by 8 publications

References 35 publications

A PMNN‐PZT Piezoceramic Based Magneto‐Mechano‐Electric Coupled Energy Harvester

A PMNN‐PZT Piezoceramic Based Magneto‐Mechano‐Electric Coupled Energy Harvester

Static and Dynamic Analysis of a Bistable Frequency Up-Converter Piezoelectric Energy Harvester

Diamagnetic-levitation-based Electromagnetic Energy Harvester for Ultralow-frequency Vibrations and Human Motions

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