Sang Wook Kwon

TL;DR: In this article, a method for controlling wireless power transmission and wireless power reception is presented, based on the amount of power to be transmitted to one or more of the plurality of target devices, a coupling factor associated with each of the targets, or both.

TL;DR: In this paper, a wireless power transmission system includes a charging and path controller configured to supply, to a battery module, power generated by a solar cell module, or energy generated by an alternating current-to-direct current (AC/DC) converter, based on a control signal.

TL;DR: In this paper, an initial control signal including an identifier (ID) of the source device and a channel fix command are transmitted to the target device through the selected controlling communication channel.

TL;DR: In this paper, an active rectifier and a wireless power receiver including the active rectifiers are provided, where the first loop and the second loop include a delay locked loop configured to compensate for reverse current leakage due to a delay of a switch included therein.

TL;DR: In this paper, a wireless power transmission system, and a method for controlling a resonance impedance and a resonance frequency of the WPT system is presented, where a power generator is configured to generate tracking power using a resonance, the tracking power being used for a resonance-frequency tracking; a source resonator is used to transmit the tracking energy to a target resonator; a mismatching detector detects a mismatch between the target and the source resonators; and a controller configured to adjust the resonance frequency, or an impedance of a repeater resonator when the mismatching is detected,