Piezoelectric MEMS Energy Harvesters

Park, Jae Yeong

doi:10.1002/9783527672943.ch10

Cited by 3 publications

(4 citation statements)

References 60 publications

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“…[1][2][3][4] In the last decade, the piezoelectric effect has also been well explored for energy harvesting applications. [5][6][7][8][9][10] Large numbers of devices have been proposed theoretically and a few prototypes have also been fabricated on the laboratory scale. [11][12][13][14] These devices have shown interesting performance properties from the microscale to the macroscale.…”

Section: Introductionmentioning

confidence: 99%

Vibration induced refrigeration and energy harvesting using piezoelectric materials: a finite element study

Kumar

Jain

et al. 2019

RSC Adv.

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In this study, the bi-functional performance of a small-scale piezoelectric cantilever, which coupled piezoelectric and elastocaloric phenomena in a single device to produce energy harvesting as well as refrigeration effects due to vibration, has been investigated. Finite element modeling has been used to examine the performance of the device. The basic structure of the device is a cantilever that vibrates between two thermal bodies (hot and cold). The properties of BaTiO 3 (single crystal) were used to examine the bi-functional performance of piezoelectric cantilevers. In this study, different cases have been investigated, which are based on a number of cantilevers between hot and cold thermal bodies.When the number of cantilevers is one, the net cooling is 0.3 K and the power is 0.03 mW, while for four cantilevers, the net cooling is 1.2 K and 0.13 mW of power is produced. The results show that as we increase the number of cantilevers, a greater refrigeration effect is produced and higher power across the electrical load is achieved. Fig. 8 Refrigeration effects due to the elastocaloric effect for different numbers of cantilevers: (a) n ¼ 1; (b) n ¼ 2; and (c) n ¼ 4. (d) The final time (to achieve maximum cooling) vs. the achieved cooling temperature for different numbers of cantilevers.3924 | RSC Adv., 2019,9,[3918][3919][3920][3921][3922][3923][3924][3925][3926] This journal is

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Section: Introductionmentioning

confidence: 99%

Vibration induced refrigeration and energy harvesting using piezoelectric materials: a finite element study

Kumar

Jain

et al. 2019

RSC Adv.

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“…The demand is fueled by progress in ultralow-power microelectronics and microfabrication techniques, which impel the development of portable and wearable smart devices for navigation, communication, fitness tracking, etc. [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…It is mostly realized via piezoelectric, electrostatic, electromagnetic and triboelectric methods. This study is concerned with piezoelectric vibration energy harvesters (P-VEHs), which are commonly used due to sufficiently high energy density and relative ease of implementation at macro and micro scales [1][2][3][4][5][6][7]. However, it is very difficult to ensure stable high-power generation with wearable P-VEHs since human body parts move at very low frequencies (usually, up to several hertz) and high amplitudes, meanwhile piezoelectric transducers used in P-VEHs may deliver practically useable power levels only when excited to resonate at high frequencies (> 50-100 Hz), accompanied by very low vibration amplitudes [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of multi-magnet excitation for enhancing micro-power generation in piezoelectric vibration energy harvester

Kleiva

Daukševičius

2019

mech

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The reported work experimentally investigates a method of more effective contactless mechanical frequency up-conversion that is based on multi-magnet plucking of a piezoelectric vibration energy harvester. Several moving excitation magnets are used to produce a periodic impulse train, which during a single plucking event consecutively deflects and then releases the cantilevered transducer to freely oscillate, thereby enabling enhanced micro-power generation performance. It was established that the proposed method is effective if a couple conditions are met. First, the transducer must be impulsively excited to produce resonant transient responses, which occurs when the ramping time of the magnetic impulse is close to the transducer rise time (defined as a quarter of the natural period). Second, the gap between the moving excitation magnets must be tuned to ensure that the impulse train period is as close to the natural period as possible. Measurements indicate that, in comparison to the conventional single-magnet plucking case, the consecutive excitation with three moving magnets leads to nearly six-fold (seven-fold) increase in average power output and total generated energy during the in-plane (out-of-plane) plucking regime.

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“…Vibration, being the most widely available energy source after solar, has been widely researched for energy harvesting [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29], [37]) and (b) power density versus voltage of novel regenerative technologies (modified from [36]).…”

Section: Introductionmentioning

confidence: 99%

Extremely low-loss rectification methodology for low-power vibration energy harvesters

Tiwari

Ryoo

Schlichting

et al. 2013

Smart Mater. Struct.

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Because of its promise for the generation of wireless systems, energy harvesting technology using smart materials is the focus of significant reported effort. Various techniques and methodologies for increasing power extraction have been tested. One of the key issues with the existing techniques is the use of diodes in the harvesting circuits with a typical voltage drop of 0.7 V. Since most of the smart materials, and other transducers, do not produce large voltage outputs, this voltage drop becomes significant in most applications. Hence, there is a need for designing a rectification method that can convert AC to DC with minimal losses. This paper describes a new mechanical rectification scheme, designed using reed switches, in a full-bridge configuration that shows the capability of working with signals from millivolts to a few hundred volts with extremely low losses. The methodology has been tested for piezoelectric energy harvesters undergoing mechanical excitation.

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Piezoelectric MEMS Energy Harvesters

Cited by 3 publications

References 60 publications

Vibration induced refrigeration and energy harvesting using piezoelectric materials: a finite element study

Vibration induced refrigeration and energy harvesting using piezoelectric materials: a finite element study

Experimental study of multi-magnet excitation for enhancing micro-power generation in piezoelectric vibration energy harvester

Extremely low-loss rectification methodology for low-power vibration energy harvesters

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