An experimental study of the effects of the acoustical load on the piezoelectric transducers performance

Verrati, Thiago G.; Arnold, Francisco J.

doi:10.1080/00150193.2020.1811035

Cited by 6 publications

(4 citation statements)

References 23 publications

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“…To determine the transducer working frequency, first the frequency spectrum of power loss of the unload piezoelectric resonator was computed by means of equation (15), where previously l m was set to cero in equations ( 5) and (14). It was found a minimum of the spectrum at a frequency located inside its resonance-antiresonance frequency interval.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…f w , which also defined l m according to the expression previously presented (l m = v m /2 f w ). Once l m was determined, the frequency spectrum of power loss of the piezoelectric transducer was computed using the same equation (15). Figure 4(a) shows the frequency spectrums of power loss of the transducer simulated for the specified acoustic loads.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…In literature, fundamentally two frequencies been profusely investigated to excite the piezoelectric transducer, namely the resonance and antiresonance ones. Traditionally, the resonance frequency has been employed to excite the ultrasound piezoelectric transducer in power applications, due to its low requirement of electric voltage [13,15]. However, it was found that in contraposition to this frequency, a diminution of power loss might be achieved by an antiresonance operation [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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A numerical investigation of power loss in a thickness-mode piezoelectric transducer

Rodríguez

Chong-Quero

2022

Modelling Simul. Mater. Sci. Eng.

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Power loss reduction in piezoelectric transducers has been attracting the attention of diverse researchers and the ultrasonic technology manufactures for years. In this context, fundamentally two frequencies have been profusely investigated to excite these transducers, namely the resonance and antiresonance ones. However, more recently other operation points have been examined. This article presents a numerical investigation of power loss in a thickness-extensional mode piezoelectric transducer, excited at its fundamental resonance, and designed with the data compatible with a very-high mechanical quality factor (Q m) piezoceramic. Additionally, harmonic electric excitations of the device and a constant velocity of its front face were supposed, when it was acoustically coupled to air or water loads, i.e. in real loading conditions for numerous applications. In this investigation it was found an optimal operation point where a remarkable power loss reduction may be obtained regarding excitations at the resonance or antiresonance frequencies. Finally, it was discovered that power loss frequency spectrum depends on the external acoustic load for this type of transducers. In simulations, a linear piezoelectrics was assumed.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A numerical investigation of power loss in a thickness-mode piezoelectric transducer

Rodríguez

Chong-Quero

2022

Modelling Simul. Mater. Sci. Eng.

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“…It is shown that the nature of the load impedance is the reason for the frequency variation in the piezoelectric transducer. Verrati and Arnold [27] utilized a liquid load for ultrasonic cleaning as the research object and established the functional relationship among the liquid column height and frequency, electromechanical coupling coefficient, damping, and elastic loss factor of the piezoelectric transducer by experimental methods.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the equivalent circuit and performance of an ultrasonic transducer under a force load

Rao,

Shi,

et al. 2023

Smart Mater. Struct.

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In ultrasonic processing technology applications, the force load can cause a drift in the resonance frequency of the ultrasonic transducer and significantly reduce its mechanical quality factor. The traditional equivalent circuit of an ultrasonic transducer can only be used to calculate performance parameters without a force load but not with a force load. Based on Mason’s equivalent circuit, a new equivalent circuit for ultrasonic transducers under a force load is derived while considering the effects of the force load on the material parameters and various types of losses in piezoelectric ceramics. Furthermore, performance parameters are analyzed, such as the resonance frequency, effective electromechanical coupling coefficient, and mechanical quality factor. The ultrasonic transducer sample is produced and the experimental platform is constructed for applying force loads on the ultrasonic transducer. The theoretical model is verified by static loading on the ultrasonic transducer. The proposed equivalent circuit provides theoretical guidance for tracking the exact resonance frequency and performance parameters of force-loading ultrasonic transducers.

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Research on correlation model between transducer temperature and acoustic performance parameters of ultrasonic machining system

Yang

et al. 2022

AIP Advances

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In the process of ultrasonic vibration cutting (UVC), the acoustic performance parameters of ultrasonic machining system change because of systems heating up and cutting loads. The changes of acoustic performance parameters will affect resonant frequency, impedance, and power match of the ultrasonic machining system, and stability of the amplitude of UVC system. It is hard to monitor the acoustic performance parameters online. Based on the analysis of the correlation mechanism between transducer temperature and acoustic performance parameters, the correlation models between transducer temperature and resonance frequency, static capacitance, and dynamic resistance of ultrasonic vibration machining system are established by curve regression analysis modeling method. The acoustic performance parameters of an ultrasonic vibration machining system are determined by transducer temperature using the correlation models. The effectiveness of the model is verified by experiments. It gives the information for the stability evaluation of the ultrasonic vibration machining process, the dynamic impedance matching of the ultrasonic machining system, and the power matching adjustment of the ultrasonic power supply.

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An experimental study of the effects of the acoustical load on the piezoelectric transducers performance

Cited by 6 publications

References 23 publications

A numerical investigation of power loss in a thickness-mode piezoelectric transducer

A numerical investigation of power loss in a thickness-mode piezoelectric transducer

Investigation of the equivalent circuit and performance of an ultrasonic transducer under a force load

Research on correlation model between transducer temperature and acoustic performance parameters of ultrasonic machining system

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