Effect of placement of piezoelectric material and proof mass on the performance of piezoelectric energy harvester

Pradeesh, E. L.; Udhayakumar, S.

doi:10.1016/j.ymssp.2019.05.044

Cited by 44 publications

(29 citation statements)

References 23 publications

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“…In response to these frequency mismatches a new trend has recently emerged with the development of electrical techniques [9,10] and power management circuits [11,12] able to tune the resonant frequency of piezoelectric cantilevers thanks to the coupling effect between the mechanical dynamics and the electrical circuit. For that purpose, the design and the fabrication of piezoelectric harvesters exhibiting a very strong global electromechanical coupling coefficient are mandatory and open up promising perspectives for broadband vibration energy harvesting, but a systematic model for optimizing piezoelectric cantilevers with a long proof mass is missing in the state of the art [13]. This paper proposes an analytical study corroborated by experimental results to give general guidelines on the geometrical and material parameters that influence the cantilever's 2 in order to maximize it.…”

Section: Introductionmentioning

confidence: 99%

“…They conclude that, within the linear response, the generated power is maximal for proof masses occupying 60%-70% of the total cantilever length. More recently, in 2019, Pradeesh and Udhayakumar [13] revealed, through FEM simulations of unimorph cantilevers with moderate proof mass sizes, that the shape of the proof mass has a minimal effect on the power harvested relative to its mass. Although these works provide interesting results, none of them is based on a comprehensive analytical study corroborated by experiments.…”

Section: Introductionmentioning

confidence: 99%

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Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

et al. 2020

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Vibration energy harvesters based on piezoelectric resonators are promising for powering Wireless Sensors Nodes (WSNs). Yet, any mismatch between the resonant frequency of traditional harvesters and the vibration frequency can drastically decrease the scavenged power and make them ineffective. Electrical techniques able to tune the resonant frequency of piezoelectric harvesters has been proposed as a solution and opens up new perspectives. To be fully competitive, this approach requires energy harvesters with very strong global electromechanical coupling coefficients k² (>10%), whose design remains a challenge today. This work reports on a method to design strongly coupled piezoelectric cantilevers thanks to an analytical approach based on the Rayleigh-Ritz method and a two degrees-of-freedom model, which considers the proof mass inertia effects. Through an expression of the coupling coefficient, we provide design guidelines, which are experimentally validated. We show that a long proof mass is a very effective configuration to maximize the global electromechanical coupling coefficient and consequently the frequency bandwidth of the system. Three proposed prototypes exhibit some of the strongest squared global electromechanical coupling coefficients k² of the state-of-the-art of piezoelectric harvesters (16.6% for the PMN-PT cantilever, 11.3% and 16.4% for the narrow and wide PZT-5A cantilevers respectively) and demonstrate a wide bandwidth behavior (10.1%, 7.8% and 11.3% of the central frequency respectively). Using a strongly coupled prototype based on PZT-5A leveraged by a dedicated integrated circuit, we experimentally show that it can harvest enough power (more than 100µW) to supply a WSN over a frequency bandwidth as large as 21%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

et al. 2020

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“…1 g of body load was applied to energy harvester. Isotropic damping factor 0.05 [25,30] was considered for energy harvester. The mass of accelerometer was applied at the free end of the cantilever beam.…”

Section: Numerical Analysismentioning

confidence: 99%

“…1 g of body load was given for energy harvester. 0.05 isotropic damping factor was [25,30] applied for both substrate and piezoelectric material. From various sizes of mesh analysis, it was found that the normal triangular mesh produces a better result at less time step along with the step frequency of 0.25 Hz.…”

Section: Numerical Analysis Of Considered Energy Harvestersmentioning

confidence: 99%

Investigation on various beam geometries for piezoelectric energy harvester with two serially mounted piezoelectric materials

2019

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This paper presents the performance (frequency response, open-circuit voltage, optimum load, voltage and power under optimum load) of various designs of cantilever-based piezoelectric energy harvester with multiple piezoelectric materials, which is excited at the fixed end using the source of mechanical vibration and to compare the performance with single piezoelectric-mounted energy harvester. The performance of the energy harvester was determined using experimental and numerical methods. COMSOL Multiphysics 5.3a was used to obtain the numerical results of energy harvester. The results show that inverted taper in thick and width, inverted taper in thick and inverted taper in width piezoelectric energy harvesters produce 46.15%, 13.13% and 37.70% more power than the conventional rectangular piezoelectric energy harvester. The resonant frequency of inverted taper in thick and width, inverted taper in thick and inverted taper in width energy harvesters is 52.05%, 45.5% and 11.08% lower than the conventional rectangular energy harvester. It is observed that the different beam geometries with two piezoelectric material produce more power than the beams with single piezoelectric material.

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“…They employed a device manufactured by Mide Technology ® (Mide Technology Corporation, Medford, USA) and elaborated the transducer modeling using an electrical model. Pradeesh et al [25] reported a PEH cantilever composed of Al and PZT-5A, which can generate an output voltage of 23.05 V at 93.7 Hz. These researchers studied the effect of the position of the piezoelectric material and proof mass along the cantilever using multiple computational simulations.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical Modeling of MEMS-Based Piezoelectric Energy Harvesting Devices for Applications in Domestic Washing Machines

et al. 2020

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Microelectromechanical system (MEMS)-based piezoelectric energy harvesting (PEH) devices can convert the mechanical vibrations of their surrounding environment into electrical energy for low-power sensors. This electrical energy is amplified when the operation resonant frequency of the PEH device matches with the vibration frequency of its surrounding environment. We present the electromechanical modeling of two MEMS-based PEH devices to transform the mechanical vibrations of domestic washing machines into electrical energy. These devices have resonant structures with a T shape, which are formed by an array of multilayer beams and a ultraviolet (UV)-resin seismic mass. The first layer is a substrate of polyethylene terephthalate (PET), the second and fourth layers are Al and Pt electrodes, and the third layer is piezoelectric material. Two different types of piezoelectric materials (ZnO and PZT-5A) are considered in the designs of PEH devices. The mechanical behavior of each PEH device is obtained using analytical models based on the Rayleigh–Ritz and Macaulay methods, as well as the Euler–Bernoulli beam theory. In addition, finite element method (FEM) models are developed to predict the electromechanical response of the PEH devices. The results of the mechanical behavior of these devices obtained with the analytical models agree well with those of the FEM models. The PEH devices of ZnO and PZT-5A can generate up to 1.97 and 1.35 µW with voltages of 545.32 and 45.10 mV, and load resistances of 151.12 and 1.5 kΩ, respectively. These PEH devices could supply power to internet of things (IoT) sensors of domestic washing machines.

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Effect of placement of piezoelectric material and proof mass on the performance of piezoelectric energy harvester

Cited by 44 publications

References 23 publications

Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

Investigation on various beam geometries for piezoelectric energy harvester with two serially mounted piezoelectric materials

Electromechanical Modeling of MEMS-Based Piezoelectric Energy Harvesting Devices for Applications in Domestic Washing Machines

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