A low-frequency rotational electromagnetic energy harvester using a magnetic plucking mechanism

Miao, Gang; Fang, Shitong; Wang, Suo; Zhou, Shengxi

doi:10.1016/j.apenergy.2021.117838

Cited by 127 publications

(36 citation statements)

References 48 publications

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“…However, it was found that the linear vibration energy harvester is not efficient if the ambient vibration frequency does not match the harvester's resonant frequency [16,17]. This is a critical issue when considering that ambient vibration excitation frequency usually features time-varying or broadband characteristics, which make such harvesters to be inefficient in many situations [18][19][20]. Meanwhile, the inevitable manufacturing tolerances, temperature change (shifting their stiffness and thus resonant frequency) seriously impede actual applications of energy harvesters.…”

Section: Introductionmentioning

confidence: 99%

Multistable vibration energy harvesters: Principle, progress, and perspectives

Zhou

Lallart

Ertürk

2022

Journal of Sound and Vibration

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139

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Section: Introductionmentioning

confidence: 99%

Multistable vibration energy harvesters: Principle, progress, and perspectives

Zhou

Lallart

Ertürk

2022

Journal of Sound and Vibration

Self Cite

139

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“…Recently, the issue of harvesting clean and renewable energy from ambient environment has been promoted to provide a possible alternative to the conventional solid-state batteries in the booming IoT world. Harvesting energy from ambient vibrations, such as winding, human motion, vehicles, machines and buildings, etc., have been reorganized as a feasible solution to supply green energy to wireless sensor nodes [ 1 , 2 , 3 , 4 , 5 , 6 ], which can be implemented by using electromagnetic [ 7 , 8 ], electrostatic [ 9 ] and piezoelectric [ 10 , 11 ] transduction mechanisms to convert mechanical energies into electricity. Among them, piezoelectric vibration energy harvesters (PEVHs) have been highlighted because of its high-power density, ease of implementation and miniaturization [ 5 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Multimodal Multidirectional Piezoelectric Vibration Energy Harvester by U-Shaped Structure with Cross-Connected Beams

Jiang

et al. 2022

Micromachines

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This paper proposes a multidirectional piezoelectric vibration energy harvester based on an improved U-shaped structure with cross-connected beams. Benefitting from the bi-directional capacity of U-shaped beam and additional bending mode induced by cross-connected configuration, the proposed structure can well capture the vibrations in 3D space at the frequencies lower than 15 Hz. These features are further validated by finite element analyses and theorical formulas. The prototype is fabricated and the experiments under different conditions are carried out. The results show that the proposed harvester can generate favorable voltage and power under multidirectional vibrations at a low operating frequency. Practical applications of charging capacitors and powering a wireless sensor node demonstrate the feasibility of this energy harvester in supplying power for engineering devices.

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“…e ambient vibration excitation frequency usually has the characteristics of time-varying and broadband, so if the ambient vibration frequency does not match the harvester's resonant frequency, the e ciency of the linear piezoelectric energy harvester is not high [5][6][7][8][9]. is makes it di cult to meet the requirements of the practical application for this linear piezoelectric energy harvester [10].…”

Section: Introductionmentioning

confidence: 99%

“…e calculation process of the λ r is described in the literature [33,34]. Substituting equation ( 8) into (7), the Taylor's expansion of U m at η(t) � 0 can be expressed as follows:…”

mentioning

confidence: 99%

Nonlinear Dynamic Analysis of Bistable Piezoelectric Energy Harvester with a New-Type Dynamic Amplifier

Man

et al. 2022

Computational Intelligence and Neuroscience

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A distributed parametric mathematical model of a new-type dynamic magnifier for a bistable cantilever piezoelectric energy harvester is proposed by using the generalized Hamilton principle. The new-type dynamic magnifier consists of a two-spring-mass system, one is placed between the fixed end of the piezoelectric beam and the L-shaped frame, and the other is placed between the L-shaped frame and the base structure. We used the harmonic balance method to obtain the analytical expressions for the steady-state displacement, steady-state output voltage, and power amplitude of the system. The effect of the distance between the magnets, the spring stiffness ratio and mass ratio of the two dynamic magnifiers, and the load resistance on the performance of the harvester is investigated. Analytical results show that compared with the bistable piezoelectric energy harvester with a typical spring-mass dynamic magnifier, the proposed new-type energy harvester system with a two-spring-mass dynamic magnifier can provide higher output power over a broader frequency band, and increasing the mass ratio of the magnifier tip mass to the tip magnet can significantly increase the output power of the BPEH + TDM system. Properly choosing the stiffness ratio of the two dynamic amplifiers can obviously improve the harvested power of the piezoelectric energy harvester at a low excitation level.

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A low-frequency rotational electromagnetic energy harvester using a magnetic plucking mechanism

Cited by 127 publications

References 48 publications

Multistable vibration energy harvesters: Principle, progress, and perspectives

Multistable vibration energy harvesters: Principle, progress, and perspectives

Multimodal Multidirectional Piezoelectric Vibration Energy Harvester by U-Shaped Structure with Cross-Connected Beams

Nonlinear Dynamic Analysis of Bistable Piezoelectric Energy Harvester with a New-Type Dynamic Amplifier

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