Design and Characterization of a Low-Cost Self-Oscillating Fluxgate Transducer for Precision Measurement of High-Current

Wang, Nong; Zhang, Zhonghua; Li, Zhengkun; He, Qing; Lin, Feipeng; Lu, Yunfeng

doi:10.1109/jsen.2016.2524042

Cited by 27 publications

(17 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Low-Cost Self-Oscillating Fluxgate Transducers have also been used to measure high currents [29]. The first microfluxgate sensor on the market was developed by Texas Instruments for current sensing applications [30].…”

Section: Fluxgate Sensorsmentioning

confidence: 99%

Contactless measurement of electric current using magnetic sensors

Ripka

2019

Tm - Technisches Messen

View full text Add to dashboard Cite

We review recent advances in magnetic sensors for DC/AC current transducers, especially novel AMR sensors and integrated fluxgates, and we make critical comparison of their properties. Most contactless electric current transducers use magnetic cores to concentrate the flux generated by the measured current and to shield the sensor against external magnetic fields. In order to achieve this, the magnetic core should be massive. We present coreless current transducers which are lightweight, linear and free of hysteresis and remanence. We also show how to suppress their weak point: crosstalk from external currents and magnetic fields.

show abstract

Section: Fluxgate Sensorsmentioning

confidence: 99%

Contactless measurement of electric current using magnetic sensors

Ripka

2019

Tm - Technisches Messen

View full text Add to dashboard Cite

show abstract

“…(10,11) To improve the shortcoming of a very large power consumption of this type of device, a lowpower switching power supply and a switch amplifier can be used to achieve the excitation and compensation circuits. (12)(13)(14) Moreover, other researchers had presented other methods to improve its performance, such as rearranging the core position to improve its shielding against external magnetic field interference (15) and adopting a new excitation method, (16) a new signal extraction method, (17) a novel detection method, (18) or control strategy. (19) Also, there are many practical applications in which a sensor chip is placed in a gap on a closed magnetic conductor for measurement.…”

Section: Introductionmentioning

confidence: 99%

Flexible-substrate Fluxgate Current Sensor Based on MEMS Technology

Yang¹,

Fan²

2020

Sensors and Materials

View full text Add to dashboard Cite

A method of preparing a flexible-substrate fluxgate based on MEMS technology was proposed, and the prepared flexible-substrate fluxgate was applied as a current sensor for online measurement. On the basis of MEMS technology, we combined the high precision and high stability of the fluxgate with the flexible and extension characteristics of the substrate to prepare a fluxgate current sensor. This flexible-substrate fluxgate current sensor not only has high precision, but also has the advantage of convenient online measurement of a Rogowski coil.

show abstract

“…The internet of things (IoT) is a new paradigm, which connects any physical objects embedded with ambient computational intelligence to each other such that these objects can recognize others and exchange collected data [ 1 , 2 , 3 ]. With the advent of the Internet of Things, there has been an increasing demand on the transducers that are able to perform diverse functions such as sensors, actuators, and radio frequency identification tags, for a wide variety of applications including communication, imaging, display, finance, data centers, transportation, health-care, and biomedical devices [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

A Compact Operational Amplifier with Load-Insensitive Stability Compensation for High-Precision Transducer Interface

Yang

Chung

2018

Sensors

View full text Add to dashboard Cite

High-resolution electronic interface circuits for transducers with nonlinear capacitive impedance need an operational amplifier, which is stable for a wide range of load capacitance. Such operational amplifier in a conventional design requires a large area for compensation capacitors, increasing costs and limiting applications. In order to address this problem, we present a gain-boosted two-stage operational amplifier, whose frequency response compensation capacitor size is insensitive to the load capacitance and also orders of magnitude smaller compared to the conventional Miller-compensation capacitor that often dominates chip area. By exploiting pole-zero cancellation between a gain-boosting stage and the main amplifier stage, the compensation capacitor of the proposed operational amplifier becomes less dependent of load capacitance, so that it can also operate with a wide range of load capacitance. A prototype operational amplifier designed in 0.13-μm complementary metal–oxide–semiconductor (CMOS) with a 400-fF compensation capacitor occupies 900-μm2 chip area and achieves 0.022–2.78-MHz unity gain bandwidth and over 65∘ phase margin with a load capacitance of 0.1–15 nF. The prototype amplifier consumes 7.6 μW from a single 1.0-V supply. For a given compensation capacitor size and a chip area, the prototype design demonstrates the best reported performance trade-off on unity gain bandwidth, maximum stable load capacitance, and power consumption.

show abstract

Design and Characterization of a Low-Cost Self-Oscillating Fluxgate Transducer for Precision Measurement of High-Current

Cited by 27 publications

References 21 publications

Contactless measurement of electric current using magnetic sensors

Contactless measurement of electric current using magnetic sensors

Flexible-substrate Fluxgate Current Sensor Based on MEMS Technology

A Compact Operational Amplifier with Load-Insensitive Stability Compensation for High-Precision Transducer Interface

Contact Info

Product

Resources

About