Design, optimization, and measurement of closed-loop Hall effect current sensor

Cheng, Xingwang; Li, Fuan; Zhang, Zongyang; Liu, Sheng

doi:10.1007/s11431-014-5614-1

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…In this work, to minimize the difference of average X-dir stress among three areas attached to PZT plates, a design guideline is proposed and the parameter is optimized through FEM. (2) The relationship between the output voltage and the displacement in Z-dir has been discussed. It is clear that the closer the sensor is placed in Z-dir, the larger the output voltage is, which also corresponds to the theoretical magnetic force.…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

“…Various types of DC current sensor device [1][2][3][4][5][6][7][8][9][10] have been developed for different measurement applications. Due to the characteristics of good performance and low cost, the Hall-element-based DC current sensor is dominant at present [1][2][3][4][5]. However, this type of sensor cannot be applied directly without a cord separator to first separate the two-wire appliance so as to measure the current.…”

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confidence: 99%

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Electrical and mechanical performance difference on piezoelectric segmentation in a passive MEMS DC current sensor applicable to two-wire DC appliances

Yang

Wang

2016

Meas. Sci. Technol.

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As society develops in intelligence, DC is being widely used in all kinds of field in modern life, which means that a sensitive and convenient DC sensor is necessary to monitor it. Compared with other kinds of current sensor, the proposed passive MEMS DC current sensor has several significant features: power-free passive sensing, small size and low cost. In this work, the performance difference of a cantilever-based bending MEMS DC current sensor among three segmentation PZT plates was first experimentally discovered. The distribution difference of X-dir (X-direction) stress along the Y axis is confirmed through FEM analysis. An optimized structure with two slots at the root of the cantilever has been proposed to minimize the difference of average X-dir stress on an area attached to three PZT plates. A nearly linear relationship between the output voltage Voutput and the AC current has been obtained through both theoretical calculation and experimental verification. The sensitivity of the developed MEMS DC current sensor is 40–25 mV A−1 in the current range of 0–400 mA. It is found that there is a good consistency among the calculation, experiment and simulation results.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Electrical and mechanical performance difference on piezoelectric segmentation in a passive MEMS DC current sensor applicable to two-wire DC appliances

Yang

Wang

2016

Meas. Sci. Technol.

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“…At present, there are two types of Hall current sensors: sensors with and without a magnetic flux concentrator. (7)(8)(9)(10)(11)(12)(13)(14)(15) To improve the accuracy of the measuring system and to reduce the crosstalk effects of other magnetic fields, a circular array of magnetic sensors without a magnetic concentrator was proposed. (7) The sensitivity of a Hall current sensor with a concentrator can be markedly improved because of the magnet congregate effect, and the influence of external magnetic fields can also be considerably reduced.…”

Section: Introductionmentioning

confidence: 99%

“…A closed-loop structure was designed by comprehensive research on the Hall element, air gap width, ferromagnetic material, and structure, in which the linearity and accuracy of the sensor reached 0.1 and 0.35% full-scale (FS), respectively, when the measured current ranged from 0 to 50 A. (15) However, it is necessary to place the measured conductor at the center of the magnetic ring when a Hall current sensor with a magnetic concentrator is adopted. (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) The common installation method is to fill the conductor into the magnetic ring aperture.…”

Section: Introductionmentioning

confidence: 99%

New Magnetic Circuit Structure of Hall Current Sensor for Reducing Conductor Position Error

Tan¹,

Wu²,

Xiaohui³

et al. 2020

Sensors and Materials

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To reduce the error of a Hall current sensor caused by the variation of the conductor position, a new symmetrical dual-core four-air-gap magnetic circuit structure is designed. The proposed structure includes two symmetrically placed dual-air-gap magnetic cores and four Hall devices, where the two symmetrically placed dual-air-gap magnetic cores are used as the sensor magnetic circuit and the average voltage output from the four Hall devices is used as the output of the sensor. First, the output error of a traditional Hall current sensor caused by the variation of the conductor position is discussed, and the principle of reducing the error by using a symmetrical dual-core four-air-gap magnetic circuit structure is analyzed. Then, a finite element simulation was performed to mimic the magnetic induction intensity at the air gap of a single-core single-air-gap magnetic core and that of the proposed circuit structure. Then, the relative error of these two circuits was calculated. Finally, a prototype of the proposed circuit structure was manufactured. The simulation and experimental results show that the proposed circuit structure can significantly reduce the measurement error caused by the position deviation of the measured conductor, and the maximum measurement error is only 0.566% when the measured current ranges from 10 to 50 A.

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Monitoring the Operating Status of an Automatic Harmful Fly Collector for Smart Greenhouses

et al. 2019

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Design, optimization, and measurement of closed-loop Hall effect current sensor

Cited by 4 publications

References 11 publications

Electrical and mechanical performance difference on piezoelectric segmentation in a passive MEMS DC current sensor applicable to two-wire DC appliances

Electrical and mechanical performance difference on piezoelectric segmentation in a passive MEMS DC current sensor applicable to two-wire DC appliances

New Magnetic Circuit Structure of Hall Current Sensor for Reducing Conductor Position Error

Monitoring the Operating Status of an Automatic Harmful Fly Collector for Smart Greenhouses

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