An integrated fluxgate magnetometer for use in closed-loop/open-loop isolated current sensing

Snoeij, M.F.; Schaffer, Viola; Udayashankar, Sudarshan; Ivanov, Mikhail

doi:10.1109/esscirc.2015.7313877

Cited by 21 publications

(14 citation statements)

References 5 publications

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“…Exciting the sensor by short pulses allows to use high excitation current peaks, which were shown to reduce perming effect and reduce the sensor noise similarly as excitation tuning which is routinely used for sensors wire-wound excitation winding [10]. Pulse excitation and processing by gated integrators is prospective for the design of integrated fluxgate sensors [11][12][13][14]. > FOR CONFERENCE-RELATED PAPERS, REPLACE THIS LINE WITH YOUR SESSION NUMBER, E.G., AB-02 (DOUBLE-CLICK HERE) < 2 the sensor tracks.…”

Section: Pulse Excited Racetrack Fluxgatementioning

confidence: 99%

Flugate Sensor With Pulse Feedback

et al. 2016

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Fluxgate sensors have typically only 100 µT range, which sometimes limits their applications. Main obstacle for increasing the measurement range power dissipated in their feedback coil. Until now the feedback was always continuous. We suggest to use pulse excitation only for the active part of the period, in which output signal is present. In this paper we show for the first time that if the sensor is excited by short pulses, the feedback need not be continuous, but it can be formed by pulses slightly wider than the excitation pulses. We have shown that in our case the feedback current duty cycle can be only 17.25 %. This means that for the same power we can increase maximum feedback current and thus the range by the factor of three. We show that this can be done without compromising the sensor performance.

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Section: Pulse Excited Racetrack Fluxgatementioning

confidence: 99%

Flugate Sensor With Pulse Feedback

et al. 2016

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“…OKELESS BUSBAR current sensors are cheap and compact, but they are sensitive to external magnetic fields and field gradients [1,2]. We have described current transducer based on a couple of microfluxgate sensors [3] inside the cylindrical hole in the busbar [4,5]. The advantage of this transducer is high range and small size compared to similar transducer based on circular sensor array around the conductor [6].…”

Section: Introductionmentioning

confidence: 99%

“…6 and 7. All previously published current transducers of this type such as [3] and [7] used sensors in the central line (positions A and C) measuring By. The fact that BAy and BCy have opposite sign was used to suppress homogeneous external field B0.…”

Section: Introductionmentioning

confidence: 99%

Busbar Current Transducer With Suppression of External Fields and Gradients

2018

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Yokeless busbar current transducers with circular sen sor array achieve high precision when replacing Hall sensors by microfluxgate. Limited field range of fluxgate can be compensated by inverse design with sensors inside the busbar. In this paper we pre sent novel scheme how to improve immunity of such sensor against external field and field gradient. We also examine crosstalk e rror for external currents close to the transducer. Using five microfluxgate sensors we designed 400 A current transducer which has suppression of 93 000 for currents in 40 cm vicini ty.

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“…Typical fluxgates are bulky, very expensive and power consuming devices [1]. Newly developed miniaturized and integrated fluxgate sensor DRV425 [2][3][4] opens new area of possibilities in the application of fluxgates [5][6][7][8]. The dimensions of the sensor are 4 × 4 × 0.8 mm and power consumption is < 30 mW (if operated continuously).…”

Section: Introductionmentioning

confidence: 99%

Testing and application of an integrated fluxgate sensor DRV425

Petrucha

Novotný

2018

Journal of Electrical Engineering

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The article presents testing of a miniature fluxgate sensor developed and manufactured by Texas Instruments as well as an application of the sensor in a compact magnetic field probe with USB interface and LabView based software. Several basic properties of the sensor were evaluated and compared with the datasheet specifications. Offset stability measurements have indicated some possible problems for applications that require very high DC and low-frequency precision. Jumps in offset were present for some of the devices, frequency and duty of the jumps varying between individual pieces and with respect to the supply voltage. Magnetic probe for fast and handy measurements of DC and AC (up to 30 kHz) magnetic fields (up to ±1 mT) is also presented. The probe contains 24-bit analog to digital converter, microcontroller and high-speed USB interface which allows a live view of the signal in time and spectral charts. The probe proved to be very useful for the DRV425 debugging, application development, EMC measurements and magnetic field demonstrations activities.

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An integrated fluxgate magnetometer for use in closed-loop/open-loop isolated current sensing

Cited by 21 publications

References 5 publications

Flugate Sensor With Pulse Feedback

Flugate Sensor With Pulse Feedback

Busbar Current Transducer With Suppression of External Fields and Gradients

Testing and application of an integrated fluxgate sensor DRV425

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