A new type of hall current sensor

Chen, Weigang; Du, Feng; Zhuo, Yue; Anheuser, Michael

doi:10.1109/imtc.2011.5944094

Cited by 7 publications

(5 citation statements)

References 1 publication

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“…According to equa tion (6), there are two independent nonlinear equations (the equations of B x and B y ) for every point, which means eight independent equations can be obtained in total. Since there are three variables to be solved (x 0 , y 0 , I), a set of overdetermined equations can be presented.…”

Section: Nonlinear Equations Methodmentioning

confidence: 99%

“…In the simulation, the wire position varies from 0 to 0.8R 0 along the radial direction with step 0.01R 0 and the angle varies from 0 to π/4 with step π/180. Besides, (B x ,B y ) is calculated for every point based on equation (6).…”

Section: Simulation Of the Algorithmsmentioning

confidence: 99%

“…An optical fiber current sensor is deficient in temperature stability and reliability [5]. Hence the HCT method, which can derive the current based on the magnetic field, has unmatched advantages when compared with the rest of the available cur rent sensors [6]. Furthermore, related compensation circuits can be integrated into Hall sensors to form Hall ICs to realize steady performances and high sensitivities [7].…”

Section: Introductionmentioning

confidence: 99%

“…Usually, circular or rectangular arrays of HCTs are used to overcome the problems above [6,9]. In order to obtain the current in the wire, Ampère's circuital method is used as an approximate way to derive the current I in the wire.…”

Section: Introductionmentioning

confidence: 99%

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Wire-positioning algorithm for coreless Hall array sensors in current measurement

Chen¹,

Zhang²,

Chen³

et al. 2018

Meas. Sci. Technol.

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This paper presents a scheme of circular-arrayed, coreless Hall-effect current transformers. It can satisfy the demands of wide dynamic range and bandwidth current in the distribution system, as well as the demand of AC and DC simultaneous measurements. In order to improve the signal to noise ratio (SNR) of the sensor, a wire-positioning algorithm is proposed, which can improve the measurement accuracy based on the post-processing of measurement data. The simulation results demonstrate that the maximum errors are 70%, 6.1% and 0.95% corresponding to Ampère’s circuital method, approximate positioning algorithm and precise positioning algorithm, respectively. It is obvious that the accuracy of the positioning algorithm is significantly improved when compared with that of the Ampère’s circuital method. The maximum error of the positioning algorithm is smaller in the experiment.

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Section: Nonlinear Equations Methodmentioning

confidence: 99%

Section: Simulation Of the Algorithmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wire-positioning algorithm for coreless Hall array sensors in current measurement

Chen¹,

Zhang²,

Chen³

et al. 2018

Meas. Sci. Technol.

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“…The optical current sensor theoretically has a dynamic response range, wide bandwidth, and good accuracy [ 9 , 10 ], but ambient changes, including vibration and temperature, can easily make the output signal unstable, resulting in low sensing accuracy. Hall current sensors are widely used because they have low cost and are suitable for the measurement of arbitrary waveform current, but their working frequency bandwidth only covers the frequency range from DC to kilohertz [ 11 , 12 , 13 , 14 ] and so cannot be used to measure high-frequency currents (Megahertz); further, their accuracy is susceptible to temperature [ 15 , 16 , 17 ]. Current transformers (CTs) and Rogowski coils (RCs) are based on the principle of electromagnetic induction; they have wide frequency bandwidth, good measurement accuracy, and measurement stability [ 18 , 19 , 20 ], but the current transformer cannot be used to measure large currents.…”

Section: Introductionmentioning

confidence: 99%

Magnetoelectric Sensor Operating in d15 Thickness-Shear Mode for High-Frequency Current Detection

Li,

Wu,

Liu

et al. 2024

Sensors

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For the application of high-frequency current detection in power systems, such as very fast transient current, lightning current, partial discharge pulse current, etc., current sensors with a quick response are indispensable. Here, we propose a high-frequency magnetoelectric current sensor, which consists of a PZT piezoelectric ceramic and Metglas amorphous alloy. The proposed sensor is designed to work under d15 thickness-shear mode, with the resonant frequency around 1.029 MHz. Furthermore, the proposed sensor is fabricated as a high-frequency magnetoelectric current sensor. A comparative experiment is carried out between the tunnel magnetoresistance sensor and the magnetoelectric sensor, in the aspect of high-frequency current detection up to 3 MHz. Our experimental results demonstrate that the d15 thickness-shear mode magnetoelectric sensor has great potential for high-frequency current detection in smart grids.

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