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Open AccessArticle

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

1
ISOTELpower, Smart Energy, Ltd., Trbovlje, 1420 Zasavska, Slovenia
2
UrsoLab Lda, 9000-238 Madeira, Portugal
3
Jožef Stefan International Postgraduate School, Jamova 39, SI-1000 Ljubljana, Slovenia
4
Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(15), 4197; https://doi.org/10.3390/s20154197
Received: 17 June 2020 / Revised: 22 July 2020 / Accepted: 24 July 2020 / Published: 28 July 2020
(This article belongs to the Section Physical Sensors)
In the last decade, we observed a noticeable increase in direct-current systems (DC), particularly in solar power generation, grid storage systems, and electric mobility. Some of these systems may require high-voltage isolation and peak currents in excess of kA. The existing standard compact and lower cost current sensing solutions hardly ever achieve an overall measurement uncertainty below 1% mainly due to offsets and hysteresis; their typical bandwidth is about 250 kHz, and they may also be noisy. This article presents a new method of isolated DC and AC current measurement based on a single gapless core and the innovative Platiše Flux Sensor. After verification in a mixed-signal simulator, the method was implemented in a functional prototype of a DC current transducer (CT) and thoroughly tested in a reference setup. The performance tests showed a low offset and hysteresis, a bandwidth in the MHz range, low power consumption, and low noise operation. Furthermore, the low current transducer achieved a typical uncertainty of less than 0.2% and a linearity of less than 200 ppm, which indicates an overall superior performance compared to representative comparable CTs based on alternative technologies. In addition to the areas of application mentioned above, the new type of DC-CT can be used for general purpose metering, measurement instrumentation, and high power DC and AC systems. View Full-Text
Keywords: Platiše Flux Sensor; current-controlled variable reluctance (CCVR); isolated direct-current transducer; direct-current current transformer (DC-CT) Platiše Flux Sensor; current-controlled variable reluctance (CCVR); isolated direct-current transducer; direct-current current transformer (DC-CT)
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MDPI and ACS Style

Platiše, U.; Kanalec, T.; Mohorčič, M. High Precision Wide Bandwidth DC Current Transducer Based on the Platiše Flux Sensor. Sensors 2020, 20, 4197.

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