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A 3-Phase Current Transducer based on microfluxgate sensors

Ripka P.; Grim V.; Chirtsov A. (Elsevier, 2019)

Novel 3-phase DC/AC current transducer for 3-phase current lines is based on 8 integrated fluxgate sensors. Using full information from each sensor rather than gradiometric pairs, we suppress crosstalk between individual ...

Effects of Core Dimensions and Manufacturing Procedure on Fluxgate Noise

Janošek M.; Vyhnánek J.; Zikmund A.; Butvin P.; Butvinová B. (Polish Academy of Sciences, 2014)

The effect of demagnetizing factor and manufacturing procedure on noise of the fluxgate probes, manufactured from metallic glasses, is presented. The fluxgate probes were either tape-wound, or flat, wet-etched ringcore ...

Field Annealed Closed-path Fluxgate Sensors Made of Metallic-glass Ribbons

Butvin P.B.; Janošek M.; Ripka P.; Butvinová B.B.; Švec sr. P.Š.; Kuzminski M.K.; Švec Jr. P.Š.; Janičkovič D.J.; Vlasák G.V. (Elsevier Science, 2012)

One-step field annealing of Co-based metallic glass was chosen to acquire low-magnetostrictive material with anisotropy required to reduce noise by favoring magnetization rotation. Despite the risk of bending stress ...

Fluxgate Offset Study

Ripka P.; Přibil M.; Butta M. (IEEE, 2014)

Offset and its long-term stability is a weak point of fluxgate sensors. Even the ultrastable sensors kept at no vibrations and stable temperature at magnetic observatories show offset drift. Such drift of the fluxgate ...

Influence of Magnetostriction of NiFe Electroplated Film on the Noise of Fluxgate

Butta M.; Janošek M.; Ripka P.; Kraus L.; El Kammouni R. (IEEE, 2014)

We electroplated NiFe thin-film over a copper layer using different current density. Magnetostriction is changed from negative to positive values, with minimum magnetostriction found at around Fe19Ni81 composition. When ...

Three-Phase Busbar Current Transducer

Chirtsov A.; Ripka P.; Grim V. (IEEE, 2019)

A true three-phase 1000 A busbar current transducer is based on six micro-fluxgate sensors. Instead of using three independent single-phase current transducers, we use the full information from each sensor. Two TI DRV425 ...

Effect of Electroplated Ni1-xFex Composition on the Field-Induced Anisotropy

Butta M.; Ripka P. (IEEE, 2016)

Field-induced anisotropy has been proposed as an effective method to produce ferromagnetic rings with radial anisotropy for fluxgate cores. Compared with stress-induced anisotropy, this method easily allows generating a ...

AC/DC Current Transformer With Single Winding

Ripka P.; Draxler K.; Styblíková R. (IEEE, 2014)

AC/DC Current Transformer With Single Winding is a device which allows simultaneously measure AC and DC current using fluxgate effect

Magnetostriction Offset of Fluxgate Sensors

Ripka P.; Butta M.; Přibil M. (IEEE, 2015)

Magnetostriction Offset of Fluxgate Sensors: we examined the origoins of offset both theoretically an experimentally

Effect of Stress Induced Anisotropy on the Noise of Ring-core Fluxgate

Butta M.; Ripka P.; Kraus L. (IEEE, 2015)

In this paper we show how an anisotropy perpendicular to the direction of excitation is favourable to obtain low noise in fluxgate sensors. We produced ring cores by electroplating NiFe thin film (6 μm) over a bended copper ...