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http://dx.doi.org/10.7471/ikeee.2019.23.2.747

A Study on Transmission Efficiency of Wireless Power Induction and Resonant Charging Methodologies  

Lho, Young Hwan (Dept. of Railroad Electrical System Engineering, Woosong University)
Publication Information
Journal of IKEEE / v.23, no.2, 2019 , pp. 747-750 More about this Journal
Abstract
Wearable devices have become practically indispensable to daily life and helped people track and manage fitness, health, and medical functions etc. As these wearable devices become smaller and more comfortable for the user, the demand for longer run time and charging ways presents new challenges for the power management engineer. Wireless power transfer (WPT) is the technology that forces the power to transmit electromagnetic field to an electrical load through an air gap without interconnecting wires. This technology is widely used for the applications from low power smart phone to high power electric railroad and main electrical grid. There are two kinds of WPT methods: Inductive coupling and magnetic resonant coupling. The model using magnetic resonant coupling method is designed for a resonant frequency of 13.45 MHz. In this study, the hardware implementations of these two coupling methods are carried out, and the efficiencies are compared.
Keywords
wireless power transfer; inductive coupling; magnetic coupling; transmission efficiency; wearable device;
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