NDLI: Design and Loss Analysis of Loosely Coupled Transformer for an Underwater High-Power Inductive Power Transfer System

Content Provider	IEEE Xplore Digital Library
Author	Zhiyuan Cheng Yang Lei Kai Song Chunbo Zhu
Copyright Year	1965
Abstract	To prevent magnetic flux leakage to the maximal extent, increase the coupling coefficient of high-power inductive power transfer (IPT) system, and reduce the electromagnetic radiation in water medium, a novel underwater loosely coupled transformer (LCT) based on the semiclosed magnetic core structure is proposed in this paper. Power loss of the devised LCT is investigated comparatively in three media including air, freshwater, and seawater. It is shown that winding loss and core loss in the three media are basically identical. However, additional eddy current (AEC) loss in various water media is different for the sake of the difference in conductivity. In particular, AEC loss is extremely low in freshwater and relatively significant in seawater. Furthermore, when the operating frequency exceeds a certain value, AEC loss will be greater than core loss and winding loss, and become the major factor in restricting transmission efficiency of LCT in seawater. Finally, theoretical analysis and simulation are demonstrated by the underwater experiment on an IPT prototype system, which can transfer 10 kW at 91% maximal transmission efficiency and over a 25 mm air gap.
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	10
Page Count	10
File Size	3302077
File Format	PDF
ISSN	00189464
Volume Number	51
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Windings Media Magnetic flux leakage Core loss Couplings Transformer cores water medium Additional eddy current (AEC) loss loosely coupled transformer (LCT) underwater inductive power transfer (IPT)
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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