Impedance Based Characterization of a High-Coupled Screen Printed PZT Thick Film Unimorph Energy Harvester

Lei, Anders; Xu, Ruijuan; Borregaard, Louise M.; Guizzetti, M.; Hansen, Ole; Thomsen, Erik Vilain

doi:10.1109/jmems.2013.2295625

Cited by 19 publications

(20 citation statements)

References 31 publications

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“…Where , are the equivalent mass and stiffness matrix, , the coupling and forcing vectors and the piezoelectric material clamped capacitance. Their expressions for parallel electrical connection are given in equations (30) to (34)…”

Section: Rayleigh-ritz Methodsmentioning

confidence: 99%

“…Though the SDOF model is commonly-used for cantilevers using a localized tip proof mass [27], it proved to be inaccurate for a bulky proof mass [28,29]. Other analytical attempts to better account for the effects induced by the proof mass either do not consider the rotary inertia [30] or still show significant discrepancies when compared to 2D Finite Element Method (FEM) simulations [31]. To the authors knowledge, analytical results detailing the impact of the proof mass on ², and thus on the frequency bandwidth, have never been proposed in the state of the art.…”

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: Rayleigh-ritz Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

et al. 2020

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“…PZT thick films of more than 10 lm can be prepared using screen-printing methods. [159][160][161][162] Unfortunately, the formed thick films are not well crystallized because of the low sintering temperature. The piezoelectricity and dielectric constant are poor compared with that of bulk ceramics.…”

Section: Micro-fabrication Processmentioning

confidence: 99%

A comprehensive review on piezoelectric energy harvesting technology: Materials, mechanisms, and applications

Liu

Zhong

Lee

et al. 2018

Applied Physics Reviews

693

314

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The last decade has witnessed significant advances in energy harvesting technologies as a possible alternative to provide a continuous power supply for small, low-power devices in applications, such as wireless sensing, data transmission, actuation, and medical implants. Piezoelectric energy harvesting (PEH) has been a salient topic in the literature and has attracted widespread attention from researchers due to its advantages of simple architecture, high power density, and good scalability. This paper presents a comprehensive review on the state-of-the-art of piezoelectric energy harvesting. Various key aspects to improve the overall performance of a PEH device are discussed, including basic fundamentals and configurations, materials and fabrication, performance enhancement mechanisms, applications, and future outlooks.

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“…Moreover, it was discovered that the narrow operational bandwidth of CBs is generally difficult to overcome using magnetic-based configurations, as the PM only operates optimally at a specific angle for all magnetisation vectors. To overcome this limitation, unimorph-configured CB that was designed with a single piezoelectric layer made of lead zirconate titanate (PZT), fused with an elastic charge conductor layer made of silicon, as well as a proof mass is proposed in [10]. Experimental results proved that by incrementing the dimensions of both layers and volume of the proof mass proportionally, the CB's resonant frequency will be greatly reduced to match the ambient vibration frequency.…”

Section: Cantilever Beam Configurationsmentioning

confidence: 99%

A Novel Self-Powered Dynamic System Using a Quasi-Z-Source Inverter-Based Piezoelectric Vibration Energy Harvester

2020

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The use of quasi-Z-source inverters (qZSIs) for DC-DC power conversion applications has gained much recognition when dealing with grid-tied renewable energy resource integrations. This paper proposes a novel self-powered dynamic system (SPDS) involving a piezoelectric vibration energy harvester (PVEH) using qZSI to establish interoperability with a DC load rated at 16.15 mW. Based on uncertain output performances from a piezoelectric cantilever beam (CB), the qZSI-based PVEH serves as a dynamic voltage restoration unit that establishes load-following synchronisation. It uses a proportional-integral based boost controller (PI-based BC) to generate strategic ordering of shoot-through voltage amplification into pulse-width modulation (PWM) gating sequences. The SPDS was modelled using two software based on commercially available product specifications: (i) COMSOL Multiphysics to mechanically design and optimise a CB. (ii) PSCAD/EMTDC to electronically design and integrate the qZSI with the optimised CB, while functioning as a testbed to model the SPDS against arbitrary wind speed and structural vibration frequency data collected from an above-ground mass rapid transit (MRT) train station in Khatib, Singapore. The acquired simulation results have depicted desirable transient responses at respective sub-systems, procuring fast settling-time responses, negligible steady-state error, as well as high efficiencies of 94.07% and 91.64% for the CB and SPDS respectively.

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Impedance Based Characterization of a High-Coupled Screen Printed PZT Thick Film Unimorph Energy Harvester

Cited by 19 publications

References 31 publications

Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

A comprehensive review on piezoelectric energy harvesting technology: Materials, mechanisms, and applications

A Novel Self-Powered Dynamic System Using a Quasi-Z-Source Inverter-Based Piezoelectric Vibration Energy Harvester

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