Piezoelectric MEMS Power Generators for Vibration Energy Harvesting

Wu, Wen-Jong; Lee, Bor Shiun

doi:10.5772/51997

Cited by 7 publications

(3 citation statements)

References 49 publications

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“…b b x kx my ¨˙ë 1 (24) where the seismic mass m, the mechanical damping b, and stiffness k 1 are taken those of the SVEH listed in table 4. The electromechanical coupling coefficient (NBl) is also taken as that of the SVEH listed in table 1.…”

Section: Discussionmentioning

confidence: 99%

“…They are realized by introducing mechanical stoppers to limit the motions of the sprung mass used to harvest vibration energy, resulting in non-smooth systems [20]. Soliman et al [24] proposed a wideband VEH that utilized a mechanical stopper placed within the envelope of motions of the suspension beam. When the beam oscillates, it engages the stopper which results in a non-smooth increase in the effective stiffness from k 1 to k 2 .…”

Section: Introductionmentioning

confidence: 99%

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Wideband, low-frequency springless vibration energy harvesters: part I

Bendame

Abdel‐Rahman

Soliman

2016

J. Micromech. Microeng.

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We present a novel architecture for wideband and low-frequency vibration energy harvesting (VEH). Springless vibration energy harvesters (SVEH) employ impact oscillators as energy harvesting elements. A seismic mass moves along a linear guide limited by stoppers at both ends of the track. An electromagnetic transducer converts the kinetic energy captured by the mass into electrical energy. Experiments using prototypes of the horizontal SVEH demonstrated low frequency harvesting (<20 Hz), wideband harvesting (up to 6.0 Hz), and an optimal rectified output power of P = 12 mW for a base acceleration amplitude of 0.5 g. A model of the electromagnetic SVEH was developed and validated experimentally. A figure of merit was defined to quantify realizable output power in linear and nonlinear VEHs. Comparison using this figure of merit shows that electromagnetic SVEHs outperform their linear counterparts by 92%-232% for acceleration amplitudes in the range of 0.4-0.6 g.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wideband, low-frequency springless vibration energy harvesters: part I

Bendame

Abdel‐Rahman

Soliman

2016

J. Micromech. Microeng.

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“…110 Resonant PEEHs respond at larger amplitudes when excitation frequency matches the harvester's natural frequency. 111 broadband frequency vibrations environment and to function relatively over a wide frequency range. Most of the harvesters reported in the literature are resonant type, however, a few non-resonant type harvesters have also been reported.…”

Section: Device Architecture Of Peehmentioning

confidence: 99%

Vibration‐based piezoelectric, electromagnetic, and hybrid energy harvesters for microsystems applications: A contributed review

et al. 2020

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Wireless sensor nodes (WSNs) and embedded microsystems have recently gained tremendous traction from researchers due to their vast sensing and monitoring applications in various fields including healthcare, academic, finance, environment, military, agriculture, retail, and consumer electronics. An essential requirement for the sustainable operation of WSN is the presence of an uninterrupted power supply; which is currently obtained from electrochemical batteries that suffer from limited life cycles and are associated with serious environmental hazards. An alternative to replacing batteries of WSNs; either the direct replacement or to facilitate battery regular recharging, is by looking into energy harvesting for its sustainable drive. Energy harvesting is a technique by which ambient energy can be converted into useful electricity, particularly for low-power WSNs and consumer electronics. In particular, vibration-based energy harvesting has been a key focus area, due to the abundant availability of vibration-based energy sources that can be easily harvested. In vibration-based energy harvesters (VEHs), different optimization techniques and design considerations are taken in order to broaden the operation frequency range through multi-resonant states, increase multi-degree-of-freedom, provide nonlinear characteristics, and implement the hybrid conversion. This comprehensive review summarizes recent developments in VEHs with a focus on piezoelectric, electromagnetic, and hybrid piezoelectric-electromagnetic energy harvesters. Various vibration and motion-induced energy harvesting prototypes have been reviewed and discussed in detail with respect to device architecture, conversion mechanism, performance parameters, and implementation. Overall sizes of most of the reported piezoelectric energy harvesters are in the millimeter to centimeter scales, with resonant frequencies in the range of 2-13 900 Hz. Maximum energy conversion for electromagnetic energy harvesters can potentially reach up to 778.01 μW/cm 3. The power produced by the reported hybrid energy harvesters (HEHs) is in the range of 35.43-4900 μW. Due to the combined piezoelectric-electromagnetic energy conversion in HEHs, these systems are capable of producing the highest power densities.

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