Digital ping selection in a multi-coil wireless charging device

    公开(公告)号:US12126185B2

    公开(公告)日:2024-10-22

    申请号:US17400053

    申请日:2021-08-11

    申请人: AIRA, INC.

    IPC分类号: H02J50/80 H02J50/12

    CPC分类号: H02J50/12 H02J50/80

    摘要: Systems, methods and apparatus for wireless charging are disclosed. A charging device has a plurality of charging cells provided on a charging surface, a charging circuit and a controller. The controller may be configured to cause the charging circuit to send pings from a plurality of charging coils using an analog ping process to scan for one or more ping responses from a receiving device in proximity to the charging surface. A subset of charging coils of the plurality of charging coils that received ping responses from the receiving device in response to the sending of pings with the analog process may be determined. Subsequently, the controller then sends pings from the subset of charging coils using a digital ping process. A combination of one or more charging coils of the subset of charging coils may then be selected based on ping responses from the receiving device.

    Wireless power feeding system having tuning adjustment circuit

    公开(公告)号:US12095281B2

    公开(公告)日:2024-09-17

    申请号:US17787227

    申请日:2020-12-16

    申请人: Raisontech Inc.

    摘要: A system for performing wireless power feeding using an existing electronic device. In the present invention, a power feeder has a power feeding coil. A power receiver has a power receiving coil, a power receiving circuit unit, and a load. Electromagnetic induction using a resonance phenomenon causes the power feeder to supply an electric energy to the power receiver. A switching circuit enables the power feeding coil to periodically repeat turning on (driving state) and turning off (resonant state) of power supply. A resonant frequency of the power receiver is substantially a period combining a time of the driving state and a time of the resonant state. A resonant frequency of the power feeder is substantially a period of the time of the resonant state, and a tuning adjusting circuit performs adjustment of a resonant capacitor and a coil.