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High Precision Wide Bandwidth DC Current Transducer Based on the Platiše Flux Sensor.

Uroš Platiše1,2,3, Tomaž Kanalec1,2, Mihael Mohorčič3,4

  • 1ISOTELpower, Smart Energy, Ltd., Trbovlje, 1420 Zasavska, Slovenia.

Sensors (Basel, Switzerland)
|August 1, 2020
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Summary
This summary is machine-generated.

A novel current transducer using a gapless core and Platiše Flux Sensor offers superior isolated direct-current (DC) and alternating-current (AC) measurement. This technology achieves high bandwidth, low noise, and under 0.2% uncertainty, outperforming existing solutions.

Keywords:
Platiše Flux Sensorcurrent-controlled variable reluctance (CCVR)direct-current current transformer (DC-CT)isolated direct-current transducer

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Area of Science:

  • Electrical Engineering
  • Measurement Science

Background:

  • Rising use of direct-current (DC) systems in solar power, energy storage, and electric vehicles necessitates advanced current sensing.
  • Existing current transducers (CTs) struggle with high-voltage isolation, kA peak currents, and achieving measurement uncertainty below 1% due to offsets and hysteresis.
  • Standard CTs exhibit limited bandwidth (approx. 250 kHz) and can be susceptible to noise.

Purpose of the Study:

  • To introduce and validate a new method for isolated DC and AC current measurement.
  • To demonstrate a functional prototype of a DC current transducer (CT) with enhanced performance characteristics.
  • To compare the proposed method's performance against existing CT technologies.

Main Methods:

  • Development of an isolated current measurement technique utilizing a single gapless core and the Platiše Flux Sensor.
  • Verification of the measurement method through mixed-signal simulation.
  • Implementation and rigorous testing of a DC current transducer (CT) prototype in a reference setup.

Main Results:

  • The developed CT exhibits low offset and hysteresis.
  • Achieved bandwidth in the MHz range, significantly exceeding conventional CTs.
  • Demonstrated low power consumption and low noise operation.
  • Attained a typical measurement uncertainty of less than 0.2% and linearity below 200 ppm.
  • Outperformed comparable CTs based on alternative technologies.

Conclusions:

  • The novel Platiše Flux Sensor-based current transducer offers superior performance for isolated DC and AC measurements.
  • The technology is suitable for high-voltage, high-current applications in renewable energy, electric mobility, and general metering.
  • This advancement addresses limitations of existing current sensing solutions, enabling more accurate and reliable power system monitoring.