A Fluxgate-Based Current Sensor for DC Bias Elimination in a Dual Active Bridge Converter
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Peer-reviewed
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Abstract
A concern with the isolation transformer in a dual active bridge (DAB) dc-dc converter is the dc bias in magnetization. This article proposes a fluxgate-based current sensor to measure the dc component mixed with a large, high-frequency ac current. Compared with a commercial Hall effect current sensor, the proposed sensor significantly reduces measurement error. This article presents the working principle and design considerations. A prototype is demonstrated for dc bias elimination control in a DAB converter.
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Keywords
Current measurement, Windings, Saturation magnetization, Magnetic flux, Transformer cores, Magnetic separation, Current transformers, Current sensor, current transformer, dc bias, dual active bridge (DAB) dc-dc converter, fluxgate, transformer core saturation
Journal Title
IEEE Transactions on Power Electronics
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Journal ISSN
0885-8993
1941-0107
1941-0107
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Publisher
Institute of Electrical and Electronics Engineers (IEEE)
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All rights reserved
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EPSRC (EP/T02030X/1)