STUDY OF LOAD CHARACTERISTICS IN WIRELESS POWER TRANSFER SYSTEM WITH FERRITE CORE | Zendy

Meng Wang | Zendy; Jing Feng | Zendy; Minghui Shen | Zendy; Yanyan Shi | Zendy

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STUDY OF LOAD CHARACTERISTICS IN WIRELESS POWER TRANSFER SYSTEM WITH FERRITE CORE

Author(s) -

Meng Wang,

Jing Feng,

Minghui Shen,

Yanyan Shi

Publication year - 2018

Publication title -

progress in electromagnetics research m

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.216

H-Index - 31

ISSN - 1937-8726

DOI - 10.2528/pierm18081609

Subject(s) - wireless power transfer , ferrite core , ferrite (magnet) , core (optical fiber) , materials science , computer science , electrical engineering , wireless , telecommunications , composite material , engineering , electromagnetic coil

For wireless power transfer via magnetic resonant coupling (MRC-WPT), magnetic coupling between resonant coils can be greatly enhanced when a ferrite core is introduced inside the coils. Based on the equivalent circuit model of wireless power transfer system, transfer characteristics of the MRCWPT system with air resonant coils and with a ferrite core are respectively analyzed in this paper. The influence mechanism of the load on the power transfer efficiency is investigated. Also, the requirement of load for improving transfer efficiency is derived when adding the ferrite core to the system. The numerical simulation and experiment result indicate that the transmission efficiency in the MRC-WPT system with ferrite core is higher than that in the counterpart with air resonant coils in the whole transfer region when the load is larger than the maximal critical load. In addition, for different transfer distances, the system efficiency for the system using the ferrite core tends to become lower than that in the air coil system when the load is smaller than the critical load.

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