公开(公告)号：US20170133860A1

公开(公告)日：2017-05-11

申请号：US15014052

申请日：2016-02-03

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Sang-Gug Lee ,  Ngan Hoang ,  Guillaume Thenaisie ,  Jeong-Seon Lee

IPC: H02J5/00 ,  H02J50/90 ,  H02J50/12

CPC classification number: H02J5/005 ,  H02J50/12 ,  H02J50/90

Abstract: For wireless power transfer, an energy field is formed by a power transmitter in a space near a transmission coil to provide a transmission power in the space of the energy field. A transferred power is receiver by a power receiver through a reception coil in the space of the energy field. An amount of the transferred power is reduced by the power receiver by performing a regulating operation using a switching frequency when the transferred power is excessive. The power transmitter detects a switching frequency signal having the switching frequency that is induced in the transmission coil when the power receiver performs the regulating operation. The power transmitter controls adjustment of the transmission power in response to the detection of the switching frequency signal. The transmission power is adjusted without a data communication for adjustment of the transmission power between the power transmitter and the power receiver.