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Sensors 2016, 16(1), 114;

DC-Compensated Current Transformer

Faculty of Electrical Engineering, Czech Technical University, Technicka 2, 166 27 Praha 6, Czech Republic
Czech Metrology Institute, V Botanice 4, 150 72 Praha 5, Czech Republic
This paper is an extended version of our paper published in “DC-compensated Current Transformer”. In Proceedings of the 2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, Montevideo, Uruguay, 12–15 May 2014.
Author to whom correspondence should be addressed.
Academic Editor: Andreas Hütten
Received: 15 November 2015 / Revised: 31 December 2015 / Accepted: 12 January 2016 / Published: 20 January 2016
(This article belongs to the Special Issue Magnetic Sensor Device-Part 2)
Full-Text   |   PDF [2864 KB, uploaded 22 January 2016]   |  


Instrument current transformers (CTs) measure AC currents. The DC component in the measured current can saturate the transformer and cause gross error. We use fluxgate detection and digital feedback compensation of the DC flux to suppress the overall error to 0.15%. This concept can be used not only for high-end CTs with a nanocrystalline core, but it also works for low-cost CTs with FeSi cores. The method described here allows simultaneous measurements of the DC current component. View Full-Text
Keywords: current transformer; current sensor; DC tolerance current transformer; current sensor; DC tolerance

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ripka, P.; Draxler, K.; Styblíková, R. DC-Compensated Current Transformer. Sensors 2016, 16, 114.

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