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Wireless power transfer (WPT) technology using magnetic field can transfer power to battery for drone without any electrical contact. In spite of the great advantages of the technology, WPT system generates strong electromagnetic fields (EMFs), which can cause interference on other electrical devices embedded in the drone. In this paper, we propose a three-phase resonant WPT charger for wirelessly...
Wireless power transfer (WPT) technology enables convenient and automatic battery charging for unmanned aerial vehicles (UAVs). However, in WPT charging systems, strong electromagnetic fields (EMFs) are inevitably generated and the power source contains a wide range of harmonics. In this paper, we propose an automated resonant wireless power transfer charger for UAV with three-phase magnetic field...
In this study, magnetically coupled coil design for high efficiency wireless power transfer (WPT) in PCB-toactive silicon (Si) interposer is proposed and analyzed using Z-parameter analysis. For strong magnetic coupling between transmitter (Tx) coil on PCB and receiver (Rx) coil on Si-interposer, each coil structure is selected considering process dimension difference between PCB and Si-interposer...
The wireless power transfer (WPT) system for electric vehicle (EV) typically has a pair of two magnetically coupled coils with the relatively large air gap between them. The time-varying currents flowing through the coils produce the intense magnetic near field around the coils which is inevitable to transfer the high power wirelessly. In this paper, we investigate the design of the coils with magnetic...
Wireless power transfer technologies have been studied steadily and reached the stage of practical use in recent years. As the commercialized research on the wireless power transfer have been performed, the wireless power transfer system utilizing the repeating-coil have been attempted. Then, the electromagnetic radiated emissions have become an important issue. In this paper, we report the measurement...
The hand-held resonant magnetic field charger (HH-RMFC) is a convenient equipment of charging the batteries without any electrical contact. Due to high coupling coefficient of HH-RMFC, the single phase power inverter with square wave encounter relatively small reactance at its harmonic frequencies. Thus, the current flowing through the Tx and Rx windings can be distorted. The distorted current with...
To overcome power distribution network (PDN) design challenges such as serious power noise, large system area burden, the wireless power transfer (WPT) system in the 3D package and IC is applied. In this study, the 3D multi-helix inductor is proposed for designing the 3D package and IC with a WPT scheme and an equivalent circuit modeling is also implemented. The fabricated package WPT system represents...
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