Kwon Yong Il

TL;DR: In this paper, a foreign substance detection method in a wireless power transmitter, according to an embodiment of the present invention, may comprise the steps of: if an object placed in a charging area is detected, searching for a current peak frequency with a maximum quality factor value in an available frequency band.

TL;DR: In this paper, a method for detecting foreign material in a wireless power transmitter according to an embodiment of the present invention may include: a step for measuring a quality factor value in an operation frequency band to search for the measurement peak frequency at which the QF value is largest, when an object disposed in a charging area is sensed; a step to store the measured peak frequency and a measurement quality factor, corresponding to the measurement, and a step transmitting information about a transmitter type to an identified wireless power receiver.

TL;DR: In this paper, a method for preventing overheating of a transmitter for transmitting wireless power to a receiver according to one embodiment of the present invention may comprise the steps of measuring a temperature of the transmitter, receiving, from the receiver, a renegotiation packet which requests entry into a renegotiotiation phase, receiving a general request packet, which requests a power transmitter capability packet, controlling a guaranteed power value on the basis of the measured temperature and a critical temperature, transmitting, to the receiver the power transmission capability packet including the guaranteed power values, and transmitting a response signal to the special request

TL;DR: In this paper, the authors proposed a wireless power transmission method and device, which consists of an inverter, a transmission coil, a demodulator, and a controller for controlling the output of the inverter.