A Shear-Mode Piezoelectric Heterostructure for Electric Current Sensing in Electric Power Grids

He, Wei; Yang, Aichao

doi:10.3390/mi10060421

Cited by 6 publications

(7 citation statements)

References 26 publications

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“…Therefore, there is no reference report on modeling the transmitting process of the BAW antenna using FEA. However, it is well known that the aperture EM field of the material's surface is easy to obtain via FEA simulation based on the constitutive relation of ME material as shown in (3).…”

Section: Simulation Of Transmission Processmentioning

confidence: 99%

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A Micromechanical Transmitter with Only One BAW Magneto-Electric Antenna

Chen

Gao

et al. 2022

Micromachines

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Implantable medical devices have been facing the severe challenge of wireless communication for a long time. Acoustically actuated magnetoelectric (ME) transducer antennas have attracted lots of attention due to their miniaturization, high radiation efficiency and easy integration. Here, we fully demonstrate the possibility of using only one bulk acoustic wave (BAW) actuated ME transducer antenna (BAW ME antenna) for communication by describing the correspondence between the BAW ME antenna and components of the traditional transmitter in detail. Specifically, we first demonstrate that the signal could be modulated by applying a direct current (DC) magnetic bias and exciting different resonance modes of the BAW ME antenna with frequencies ranging from medium frequency (MF) (1.5 MHz) to medium frequency (UHF) (2 GHz). Then, two methods of adjusting the radiation power of the BAW ME antenna are proposed to realize signal amplification, including increasing the input voltage and using higher order resonance. Finally, a method based on electromagnetic (EM) perturbation is presented to simulate the transmission process of the BAW ME antenna via the finite element analysis (FEA) model. The simulation results match the radiation pattern of magnetic dipoles perfectly, which verifies both the model and our purpose.

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Section: Simulation Of Transmission Processmentioning

confidence: 99%

“…Wireless implantable medical devices (IMDs) have sparked a new wave of research on biomedical technology [1][2][3]. However, the problem of wireless communication has, for a long time, been an arduous challenge in the development of IMDs [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Micromechanical Transmitter with Only One BAW Magneto-Electric Antenna

Chen

Gao

et al. 2022

Micromachines

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“…The shear piezoelectric effect has drawn great attention [10][11][12][13], which exhibits a higher piezoelectric constant compared with the conventional mode. Non-resonant current sensing devices based on cymbal structures have been developed [14,15], which explore the shear piezoelectric effect. The sensitivity and resolution for the single wire are respectively ~6.98 mV/A and 0.05 A [14], and those for the two-wire power cord are 12.74 mV/A and 0.04 A [15], respectively.…”

Section: Introductionmentioning

confidence: 99%

A non-resonant piezoelectric sensor for measuring 50Hz or 60Hz electric currents

Niu

Luo

et al. 2023

J. Phys.: Conf. Ser.

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A non-resonant piezoelectric sensor for measuring power-frequency (50 Hz or 60 Hz) electric currents is proposed to be applied in electric power systems. The device consists of a magnetic circuit, two piezoelectric plates, and fixed plates. The magnetic circuit is made up of three NdFeB magnets and two permalloy yokes. The high sensitivity of the device is attributed to the magnetic field concentration and the induced shear stresses. A prototype has been fabricated and the feasibility of the self-powered sensor was validated. The average sensitivity reaches 28.56 mV/A in the range of 1 A to 10 A, and the accuracy is 0.02089 mV at a current of 3.5 A. A current variation of 0.02 A is distinguished under the non-resonant condition of 50 Hz. The self-powered, highly sensitive, non-resonant, and high-resolution characteristics make the device favorable for measuring real-time electric currents in electric power systems.

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“…The device couples the alternating magnetic field of the current-carrying wire and vibrates at the frequency of the current. Recently, current sensors based on piezoelectric cymbal structures have been explored [20,21]. The resolution is 0.05 A [20] and 0.04 A [21] for a single wire and a two-wire power cord, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, current sensors based on piezoelectric cymbal structures have been explored [20,21]. The resolution is 0.05 A [20] and 0.04 A [21] for a single wire and a two-wire power cord, respectively. To improve the resolution, a current sensor using a piezoelectric drum transducer is designed in this paper.…”

Section: Introductionmentioning

confidence: 99%

A High-Resolution Electric Current Sensor Employing a Piezoelectric Drum Transducer

2021

Micromachines

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A high-resolution sensor using a piezoelectric drum transducer is proposed for power frequency current sensing (50 Hz or 60 Hz). The utilization of the magnetic circuit helps to enhance the response to the electric currents in the power cords. The high sensitivity of the sensor originates from the superposition of the Ampere forces and the amplified piezoelectric effect of the drum transducer. The feasibility of the sensor was verified by experiments. The device exhibits a broad 3 dB bandwidth of 67.4 Hz without an additional magnetic field bias. The average sensitivity is 31.34 mV/A with a high linearity of 0.49%, and the resolution of the sensor attains 0.02 A. The resolution is much higher than that of the previous piezoelectric heterostructure for two-wire power-cords. Error analysis shows that the uncertainty reaches 0.01865 mV at the current of 2.5 A. Meanwhile, the device can generate a load power of 447.9 nW with an optimal load resistance of 55 KΩ at 10A (f = 50Hz) in energy harvesting experiments. The features of high sensitivity, excellent linearity, high resolution, low costs, and convenient installation demonstrate the application prospect of the proposed device for measuring power frequency currents in electric power grids.

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A Shear-Mode Piezoelectric Heterostructure for Electric Current Sensing in Electric Power Grids

Cited by 6 publications

References 26 publications

A Micromechanical Transmitter with Only One BAW Magneto-Electric Antenna

A Micromechanical Transmitter with Only One BAW Magneto-Electric Antenna

A non-resonant piezoelectric sensor for measuring 50Hz or 60Hz electric currents

A High-Resolution Electric Current Sensor Employing a Piezoelectric Drum Transducer

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