Hysteresis Compensation Based on Controlled Current Pulses for Magnetoresistive Sensors

Xie, Fei; Weiß, Roland; Weigel, Robert

doi:10.1109/tie.2015.2458958

Cited by 45 publications

(14 citation statements)

References 16 publications

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“…Using a bias field parallel to the sensitive axis can shift the operating point of GMR sensor to the linear portion of the characteristic curve, which will effectively result in a bipolar output signal and will also reduce the level of hysteresis [6], [11]- [15], but will not eliminate it completely. This biasing can be done either with an external permanent magnet [11] or a coil winding carrying a current [12]- [15], where the biasing magnetic field generated by a coil can be easily controlled. The biasing currents can be DC, AC, square wave and short pulses [12]- [15].…”

Section: Introductionmentioning

confidence: 99%

“…This biasing can be done either with an external permanent magnet [11] or a coil winding carrying a current [12]- [15], where the biasing magnetic field generated by a coil can be easily controlled. The biasing currents can be DC, AC, square wave and short pulses [12]- [15]. The control of the biasing current is usually open loop, so it needs relatively expensive set-ups to obtain accurate measurements of the current in the coil, but some studies have used closed-loop feedback of GMR sensor as current sensor [16].…”

Section: Introductionmentioning

confidence: 99%

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A Closed-Loop Operation to Improve GMR Sensor Accuracy

Dixon

2016

IEEE Sensors J.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Closed-Loop Operation to Improve GMR Sensor Accuracy

Dixon

2016

IEEE Sensors J.

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“…For instance, the crosstalk current interference, the Earth’s magnetic interference, etc. For individual TMR sensors, their hysteresis [ 23 , 24 , 25 , 26 ], nonlinearity, bandwidth, temperature property, etc. cannot be neglected.…”

Section: Discussionmentioning

confidence: 99%

Circular Array of Magnetic Sensors for Current Measurement: Analysis for Error Caused by Position of Conductor

Zheng

Liu

et al. 2018

Sensors

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This paper analyzes the measurement error, caused by the position of the current-carrying conductor, of a circular array of magnetic sensors for current measurement. The circular array of magnetic sensors is an effective approach for AC or DC non-contact measurement, as it is low-cost, light-weight, has a large linear range, wide bandwidth, and low noise. Especially, it has been claimed that such structure has excellent reduction ability for errors caused by the position of the current-carrying conductor, crosstalk current interference, shape of the conduction cross-section, and the Earth’s magnetic field. However, the positions of the current-carrying conductor—including un-centeredness and un-perpendicularity—have not been analyzed in detail until now. In this paper, for the purpose of having minimum measurement error, a theoretical analysis has been proposed based on vector inner and exterior product. In the presented mathematical model of relative error, the un-center offset distance, the un-perpendicular angle, the radius of the circle, and the number of magnetic sensors are expressed in one equation. The comparison of the relative error caused by the position of the current-carrying conductor between four and eight sensors is conducted. Tunnel magnetoresistance (TMR) sensors are used in the experimental prototype to verify the mathematical model. The analysis results can be the reference to design the details of the circular array of magnetic sensors for current measurement in practical situations.

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“…In [21] a hysteresis compensation method based on controlled current pulses for magnetoresistive sensors was introduced. With the help of the hysteresis compensation method, the AMR sensors from project partner Infineon with larger hysteresis were able to apply the calibration method in this paper.…”

Section: Discussionmentioning

confidence: 99%

Simple Mathematical Operation-Based Calibration Method for Giant Magnetoresistive Current Sensor Applying B-Spline Modeling

2016

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Nowadays, giant magnetoresistance (GMR)-based sensor technology is widely used in numerous industrial applications. However, an inexpensive and efficient method for compensating the nonlinear output of GMR spin valve sensors is still under the industrial prospect, which limits the application of the GMR sensors. By applying the B-Spline modeling, excellent results can be achieved; nevertheless, the sensor has to be calibrated in the whole temperature range. In this paper, a simple mathematical operation-based calibration method for GMR spin valve-type current sensors applying B-Spline modeling is introduced. Instead to measure dozens of temperatures and per temperature several hundreds of points, this method allows a calibration for each further sensor applying B-Spline modeling with only two temperatures and per temperature only 15 points. In comparison with the original calibration measurement over temperature for B-Spline modeling, the new calibration with minimized efforts shows outstanding measurement accuracy of ±0.6% at a nominal current of 50 A in a temperature range from −20°C to 80°C.

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Hysteresis Compensation Based on Controlled Current Pulses for Magnetoresistive Sensors

Cited by 45 publications

References 16 publications

A Closed-Loop Operation to Improve GMR Sensor Accuracy

A Closed-Loop Operation to Improve GMR Sensor Accuracy

Circular Array of Magnetic Sensors for Current Measurement: Analysis for Error Caused by Position of Conductor

Simple Mathematical Operation-Based Calibration Method for Giant Magnetoresistive Current Sensor Applying B-Spline Modeling

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