A New Compact Fluxgate Current Sensor for AC and DC Application

Yang, Xiaoguang; Li, Yuanyuan; Wei, Guo; Zheng, Weidong; Xie, Cunfu; Yu, Hongli

doi:10.1109/tmag.2014.2330373

Cited by 21 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Equations (10) and (11), the sensitivity of the sensor in cases 1 and 2 can be calculated as:…”

Section: Principle Of Over Range Measurementmentioning

confidence: 99%

“…The sensor having higher accuracy and larger measurement range can achieve larger range measurement of the insulation fault and reflect more accurate trend of the system insulation degradation [6], [7]. In recent years, various types of high-accuracy and highbandwidth DC current sensors have been designed in a couple of papers to meet the ever growing demands on measurement [8]- [10], among which, the flux gate sensor was designed to measure the DC leakage current of the system [11]- [13]. In 2009, a research team led by Xu Zeliang of Siemens (China) Co., Ltd. designed a B-type residual current detector based on self-excited oscillation applying magnetic modulation principle.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Research on Over-Range Measurement Method Based on Quasi-Digital Direct-Current Leakage Current Sensor

et al. 2021

View full text Add to dashboard Cite

As for the direct-current (DC) power systems, the DC leakage current sensor is indispensable for positioning insulation faults. And in this paper, a quasi-digital flux gate sensor was designed based on duty ratio model, and the mathematical model between the excitation voltage period and the measured current which exceeded the measurement range was built by analyzing the working principles of the dutyratio model digital sensor. In this way, the measurement range of the original sensor could be expanded to 1.5 times of its original. Meanwhile, without changing the hardware, the solution provided in this paper also solved the measurement failure problem of part of sensors when the any overcurrent situations happen in the system, such as overload or short-circuit. Besides, the sensor designed in this paper could achieve Level-0.1 measurement accuracy within range, and reach Level-2 over-range measurement accuracy, satisfying the demands of DC power supply system on leakage current measurement.

show abstract

“…According to Equations (10) and (11), the sensitivity of the sensor in cases 1 and 2 can be calculated as:…”

Section: Principle Of Over Range Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Research on Over-Range Measurement Method Based on Quasi-Digital Direct-Current Leakage Current Sensor

et al. 2021

View full text Add to dashboard Cite

show abstract

“…A fluxgate sensor is a type of magnetic sensor that has a broad range of applications, including position sensing, compasses, and isolated current sensing 5–8 . Fluxgate sensors offer higher performance than traditional sensors and can measure the torque directly at the joint.…”

Section: Introductionmentioning

confidence: 99%

Study and implementation of fluxgate current sensor with wireless connectivity for finger exoskeleton rehabilitation

Lin

Liao

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

SummaryA fully integrated fluxgate magnetometer has been developed to monitor motor current in a finger exoskeleton device. The use of a fluxgate sensor can provide more accurate and natural movement of the fingers, as well as reducing the weight and complexity of the exoskeleton design. The sensor we developed incorporates several advanced features that provide enhanced sensitivity and accuracy compared to existing state‐of‐the‐art sensors. These features include a fluxgate frontend readout circuit with chopping stabilization technology, which achieves a gain of 14.3 V/T, a low noise density of 4.5 nT/√Hz, and a wide measurement range of ±1.5 mT. The gain variation of the sensor is only 1.5% at an 850 kHz bandwidth, and it has a wide dynamic current range from 0.005 mA to 100 A. The sensor also features an integrated 2.4 GHz wireless circuit for easy data transmission. The use of a fluxgate sensor in monitoring motor torque in the proximal interphalangeal joint can provide more precise and natural finger movement and reduce the weight and complexity of the exoskeleton design.

show abstract

“…However, due to the lower use of a magnetic core to compensate the modulation ripple induced in the primary and secondary windings due to the transformer effect, the obtained accuracy is only about 0.5% in the full scale of ±20 A [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

A High Accuracy AC+DC Current Transducer for Calibration

Xiao

Song

2022

Sensors

View full text Add to dashboard Cite

Facing a lack of high accuracy current standards in the calibration of AC (Alternating Current) + DC (Direct Current) measurement devices that function to measure DC and AC simultaneously, a measurement method with high accuracy is proposed based on zero-flux self-oscillating fluxgate. An iron core and two windings are added onto the single-iron-core double-winding structure of the traditional self-oscillating fluxgate. The added iron core and its upper winding are used to weaken the influence of ripple on the sensor’s accuracy. The other one of the added windings is used for the feedback from the AC+DC magnetic potential, allowing the sensor to work in a zero-flux state and to measure AC+DC simultaneously. An AC+DC transducer prototype with an AC ranging from 0–500 A and DC 0–300 A is developed by selecting the core parameters and an optimized design of the circuit. The test results of the prototype show that the prototype can measure the AC and DC simultaneously, and the measurement accuracy reaches class 0.05 level in the nominal current range. This transducer can be used as a calibration standard of measurement devices for AC only, DC only, or AC and DC simultaneously. Compared with the AC+DC current transducer with the same accuracy level, the proposed transducer has fewer cores and simpler measuring circuit.

show abstract

A New Compact Fluxgate Current Sensor for AC and DC Application

Cited by 21 publications

References 11 publications

Experimental Research on Over-Range Measurement Method Based on Quasi-Digital Direct-Current Leakage Current Sensor

Experimental Research on Over-Range Measurement Method Based on Quasi-Digital Direct-Current Leakage Current Sensor

Study and implementation of fluxgate current sensor with wireless connectivity for finger exoskeleton rehabilitation

A High Accuracy AC+DC Current Transducer for Calibration

Contact Info

Product

Resources

About