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Energies 2017, 10(3), 312;

A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China
Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
Department of Mechanical Engineering, University of Texas at Dallas, Richardson, TX 75080, USA
Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76019, USA
Author to whom correspondence should be addressed.
Academic Editor: K.T. Chau
Received: 21 January 2017 / Accepted: 28 February 2017 / Published: 6 March 2017
(This article belongs to the Section Energy Fundamentals and Conversion)
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Traditional current transformers (CTs) suffer from DC and AC saturation and remanent magnetization in many industrial applications. Moreover, the drawbacks of traditional CTs, such as closed iron cores, bulky volume, and heavy weight, further limit the development of an intelligent power protection system. In order to compensate for these drawbacks, we proposed a novel current measurement method by using Hall sensors, which is called the Hall-effect current transformer (HCT). The existing commercial Hall sensors are electronic components, so the reliability of the HCT is normally worse than that of the traditional CT. Therefore, our study proposes a redundancy mechanism for the HCT to strengthen its reliability. With multiple sensor modules, the method has the ability to improve the accuracy of the HCT as well. Additionally, the proposed redundancy mechanism monitoring system provides a condition-based maintenance for the HCT. We verify our method with both simulations and an experimental test. The results demonstrate that the proposed HCT with a redundancy mechanism can almost achieve Class 0.2 for measuring CTs according to IEC Standard 60044-8. View Full-Text
Keywords: coreless Hall-effect current transformer (HCT); current measurement; current transformer (CT); Hall sensor; multiple sensor module; redundancy coreless Hall-effect current transformer (HCT); current measurement; current transformer (CT); Hall sensor; multiple sensor module; redundancy

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Chen, K.-L.; Wan, R.-S.; Guo, Y.; Chen, N.; Lee, W.-J. A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers. Energies 2017, 10, 312.

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