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Adaptation of Discrete‐Type Cores for Secondary Coils of Wireless Power Transfer System for Railway
Author(s) -
SHIMODE DAISUKE,
MURAI TOSHIAKI,
SAWADA TADASHI
Publication year - 2017
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23000
Subject(s) - electromagnetic coil , wireless power transfer , electrical engineering , ferrite core , maximum power transfer theorem , type (biology) , power (physics) , adaptation (eye) , materials science , engineering , computer science , mechanical engineering , electronic engineering , physics , geology , optics , paleontology , quantum mechanics
SUMMARY This paper examines the shapes of cores for secondary coils of the wireless power transfer (WPT) system for a railway. An infinitely long cable‐type coil is utilized as the primary coil for the WPT system because it is economical. Thus, this paper examines the ferrite core shapes for the secondary coils that are suitable for an infinitely long primary coil. The cores should be as thin as possible to reduce weight. However, bonding small cores to manufacture larger thin cores reduces the performance of the secondary coils. As a result, the cores are paradoxically required to be thicker. Therefore, this paper proposes the adaptation of thicker discrete‐type cores with the same volume as conventional flat‐type cores for the secondary coils.