Wireless Power Transmission Based on Sandwiched Composite Piezoelectric Transducers in Length Extensional Vibration

Lin, Shuyu; Chen, Hui; Qiao, Xiaoyang

doi:10.1109/tpel.2015.2502586

Cited by 15 publications

(11 citation statements)

References 26 publications

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“…Zhang et al (2015b) proposed a three-port equivalent circuit model to investigate the free and forced vibrations of a multilayer piezoelectric transducer, which can effectively simplify the analysis, modeling, and evaluation of the piezoelectric stack transducers in either transmitter mode or receiver mode. Lin et al (2016) established an electromechanical equivalent circuit model to analyze the electromechanical characteristics of the sandwiched composite piezoelectric transducers composed of two longitudinally polarized piezoelectric ceramic stacks, which can be used as a wireless power transmission system. All these theoretical models greatly promote the development and application of the piezoelectric stack transducers.…”

Section: Introductionmentioning

confidence: 99%

Modeling and electromechanical performance analysis of frequency-variable piezoelectric stack transducers

Wang

Cai

Qin

et al. 2020

Journal of Intelligent Material Systems and Structures

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An exact analytical model of frequency-variable piezoelectric stack transducers is proposed, and their dynamic characteristics are studied in this article. Based on the linear piezoelasticity theory, the dynamic analytical solution is first derived, and then its correctness is validated by comparing it with the results of a special example in the previous literature and the ones of the experimental study. The effects of the tuning resistance and the layer number of the active element on the dynamic characteristics are discussed. Numerical results show that tuning the resistance and the layer number of the active element can enable the multi-frequency characteristics of the piezoelectric stack transducers. A proper layer number of the active element can minimize the short-circuited resonance frequency and the open-circuited anti-resonance frequency. These findings provide guidelines to design and optimize the piezoelectric stack transducers, which have promising potential in developing the multi-frequency Langevin transducers for some underwater sound and ultrasonic applications, such as ultrasonic cleaning, ultrasonic chemistry, and sonar radiators.

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Section: Introductionmentioning

confidence: 99%

Modeling and electromechanical performance analysis of frequency-variable piezoelectric stack transducers

Wang

Cai

Qin

et al. 2020

Journal of Intelligent Material Systems and Structures

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“…Compared to the density, the elastic constant is the dominant factor for the fundamental k d . (5) Neglecting the electrodes and the protective layers in the actuator model will result in the inaccurate prediction, especially for the thicker ones.…”

Section: Resultsmentioning

confidence: 99%

“…Piezoelectric stack actuators, by virtue of their unique stack configuration that can activate large power and displacement outputs, have been widely used in linear vibrators for various engineering applications, such as ultrasonic transducers, 1 –5 higher resolution positioners, 6 fuel injectors, 7,8 self-moving cell linear motors, 9 and so on. This type of actuators is usually fabricated by stacking multiple thin piezoelectric wafers, multiple electrodes, and two protective layers at the two ends.…”

Section: Introductionmentioning

confidence: 99%

Effects of electrodes and protective layers on the electromechanical characteristics of piezoelectric stack actuators

Wang

Qin

et al. 2019

Advanced Composites Letters

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Piezoelectric stack actuators are a type of excellent smart devices that can activate large power and displacement outputs due to their unique stack configuration and have been widely used in linear vibrators for various engineering applications. For the fabricated piezoelectric stack actuator, it usually consists of multiple thin piezoelectric wafers, multiple electrodes, and two protective layers. All the piezoelectric wafers are connected electrically in parallel through the electrodes and are protected by two protective layers at the two ends. However, in most of the theoretical models, the active piezoelectric portion is mainly considered, while the electrodes and protective layers are usually neglected to simplify the complicated problem, which results in an inaccurate prediction of the electromechanical characteristics. In our previously published work, the exact theoretical models of the piezoelectric stack energy harvester and sensor with the electrodes and the protective layers included have been established successfully to evaluate the electromechanical performance of these two types of devices, and their validity has verified by the experimental results. However, the exact theoretical model of the piezoelectric stack actuators has not been established, and the effects of the electrodes and the protective layers on the electromechanical characteristics of the actuator are not fully understood. In this article, the exact theoretical model of piezoelectric stack actuator was derived based on our previous work, and the effects of these two factors on the electromechanical characteristics were investigated. Comparisons with the results in the earlier literatures and the experimental results were presented to validate the model. Furthermore, two kinds of typical working states, including clamped–free (C-F) and free–free (F-F), were discussed. The results showed that neglecting the electrodes and the protective layers will greatly affect the accuracy of the prediction model, thus providing some valuable guidelines in designing the piezoelectric stack actuators.

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“…Cascaded-piezoelectric-transducers (CPETs), as a key component for energy-conversion scenarios, have attracted extensive attentions due to their versatile applications in ultrasonic scalpels, acoustic levitation, and sonar. [1][2][3][4][5] A CPET usually contains two kernel units. Lead zirconate titanate piezoelectric ceramic (Pb(Zr x Ti 1−x )O 3 , PZT) is the core unit for piezoelectric energy conversion (interconvert mechanical energy and electrical energy).…”

Section: Introductionmentioning

confidence: 99%

Designing New‐Generation Piezoelectric Transducers by Embedding Superior Graphene‐Based Thermal Regulators

Shan

Wang²,

Zhou

et al. 2021

Advanced Materials

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Cascaded‐piezoelectric‐transducers (CPETs) is a key component in modern energy‐conversion fields, possessing versatile applications in ultrasonic scalpels, acoustic levitation, and sonar. However, serious self‐heating inevitably occurs inside high‐power CPETs, severely limiting their practical applications in broader fields. To tackle this, multidirectional heat‐escape channels of multidimensional (multi‐D, 3D/2D) graphene films are introduced in designing new‐type thermal regulators. A porous AlN‐ceramic thermal‐sink is creatively selected as a template for directly synthesizing graphene via a two‐step chemical vapor deposition strategy. This perfect combination of 3D/2D‐graphene and the AlN ceramic can integrate their complementary advantages in uniformizing, transmitting, and releasing heat. Amazingly, in the new‐generation CPETs embedded with these graphene‐based thermal regulators, the self‐heating‐induced temperature rise can be substantially reduced by ≈60% (far exceeding actual demand standard). As another kernel parameter, electroacoustic‐energy‐conversion efficiency is dramatically improved in the new‐generation CPETs. Briefly, this research realizes the first synthesis of a novel multi‐D‐graphene/AlN‐ceramic hybrid, and propels its brand‐new application directions in new‐generation energy‐conversion‐ and thermal‐management‐related territories.

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Wireless Power Transmission Based on Sandwiched Composite Piezoelectric Transducers in Length Extensional Vibration

Cited by 15 publications

References 26 publications

Modeling and electromechanical performance analysis of frequency-variable piezoelectric stack transducers

Modeling and electromechanical performance analysis of frequency-variable piezoelectric stack transducers

Effects of electrodes and protective layers on the electromechanical characteristics of piezoelectric stack actuators

Designing New‐Generation Piezoelectric Transducers by Embedding Superior Graphene‐Based Thermal Regulators

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