公开(公告)号：US10892647B2

公开(公告)日：2021-01-12

申请号：US16136648

申请日：2018-09-20

Applicant: WITS Co., Ltd.

Inventor： Se Joo Kim ,  Jung Woo Choi ,  Tae Seok Ko ,  Byoung Woo Ryu

IPC: H02J50/12 ,  H02J50/80 ,  H02J50/05

Abstract: A wireless power transmitter having a data transmission and reception capability is disclosed. The wireless power transmitter includes a main coil to transmit power, an inverter to apply an alternating current (AC) signal to the main coil, a communication module to output a transmission signal including transmission data to be wirelessly transmitted the wireless power transmitter, and/or receive a reception signal including received data wirelessly received by the wireless power transmitter, a first connecting circuitry to prevent a power signal of the main coil from being input to the communication module, and the auxiliary coil to connect to the main coil and connected to the first connecting circuitry. The main coil or the auxiliary coil may be configured to transmit the transmission data and receive the reception signal, and the auxiliary coil may be wiredly connected to the main coil or not wiredly connected to the main coil.

公开(公告)号：US10516446B2

公开(公告)日：2019-12-24

申请号：US15686367

申请日：2017-08-25

Applicant: WITS Co., Ltd.

Inventor： In Wha Jeong ,  Young Woon Choi ,  Se Joo Kim

IPC: H04B5/00 ,  H02J7/02 ,  H02J50/80 ,  H02J50/10 ,  H02J50/90 ,  H02J50/40

Abstract: A wireless power transmitter includes a switch circuit including switches connected to a transmission resonator; a current detector configured to detect a transient current induced in the transmission resonator; and a controller configured to control the switch circuit and adjust an output of the wireless power transmitter based on an amplitude of the transient current.

公开(公告)号：US10886783B2

公开(公告)日：2021-01-05

申请号：US16159818

申请日：2018-10-15

Applicant: WITS Co., Ltd.

Inventor： Se Joo Kim ,  Tae Seok Ko ,  Young Woon Choi ,  Joung Ho Son ,  Doo Young Song

IPC: H02J50/12 ,  H02M7/5387 ,  H01F38/14 ,  H02J7/02 ,  H02M7/48 ,  H02M7/487

Abstract: A wireless power transmission apparatus includes: an alternating current (AC) power output to convert input power into AC power and output the AC power; and a power transmitter including a plurality of resonators. The power transmitter receives the AC power and wirelessly transmits the AC power in a first operating mode in which two of the resonators are connected in series and the two resonators transmit the AC power, and in a second operating mode in which one of the resonators transmits the AC power.

公开(公告)号：US10749381B2

公开(公告)日：2020-08-18

申请号：US15801871

申请日：2017-11-02

Applicant: WITS Co., Ltd.

Inventor： Dong Woo Han ,  Byoung Woo Ryu ,  Hyo Young Kim ,  Se Joo Kim ,  Young Seung Roh

IPC: H02J50/12 ,  H02M7/48 ,  H02M1/00 ,  H02J7/02

Abstract: A wireless power transmission device including a resonant circuit magnetically coupled to a wireless power reception device and being configured to wirelessly transmit power, an alternating current (AC) generator including switches and being configured to receive a direct current (DC) voltage and to generate an AC current, according to a switching operation of the switches, to be supplied to the resonant circuit, and a variable capacitor connected to an output terminal of the AC generator and having a first capacitance, when a load state of the wireless power reception device is provided as a full load state and a second capacitance lower than the first capacitance, when the load state is provided as a light load state.