Wireless charging method and apparatus therefor

    公开(公告)号:US11437849B2

    公开(公告)日:2022-09-06

    申请号:US16761199

    申请日:2018-11-02

    Abstract: An embodiment of the present invention relates to a wireless charging method in a wireless power transmitter, the method comprising: a step of sensing an object in a charging region; a step of measuring a quality factor value; a step of receiving information including a reference quality factor value; a step of detecting a foreign object by using the measured quality factor value and the reference quality factor value; and a step of transmitting a response signal including ACK or NAK information according to whether or not the foreign object has been detected, wherein the wireless power transmitter transmits information including a first guaranteed power value when the response signal includes ACK information, and transmits information including a second guaranteed power value when the response signal includes NAK information, wherein the first guaranteed power value is greater than the second guaranteed power value.

    Wireless power transmitting apparatus

    公开(公告)号:US10546685B2

    公开(公告)日:2020-01-28

    申请号:US16405746

    申请日:2019-05-07

    Abstract: A wireless power transmitting apparatus can include a first transmitting coil; a second transmitting coil; a third transmitting coil on the first transmitting coil and the second transmitting coil; and a substrate to accommodate the first transmitting coil, the second transmitting coil, and the third transmitting coil, in which the substrate includes a wall to surround a part of an outer circumference of the first transmitting coil and a part of an outer circumference of the second transmitting coil; a first protrusion to surround a first part of an outer circumference of the third transmitting coil; and a second protrusion to surround a second part of the outer circumference of the third transmitting coil, in which the first protrusion comprises a first stepped portion to support the third transmitting coil, and the second protrusion comprises a second stepped portion to support the third transmitting coil.

    Wireless power transmitting apparatus

    公开(公告)号:US10361026B2

    公开(公告)日:2019-07-23

    申请号:US15835009

    申请日:2017-12-07

    Abstract: A wireless power transmitting apparatus including a first transmitting coil; a second transmitting coil; a third transmitting coil on the first transmitting coil and the second transmitting coil; and a substrate to accommodate the first transmitting coil, the second transmitting coil, and the third transmitting coil, further the substrate includes a wall to surround a part of an outer circumference of the first transmitting coil and a part of an outer circumference of the second transmitting coil; a first protrusion to surround a first part of an outer circumference of the third transmitting coil; and a second protrusion to surround a second part of the outer circumference of the third transmitting coil.

    Wireless charging method and apparatus therefor

    公开(公告)号:US11817716B2

    公开(公告)日:2023-11-14

    申请号:US17872708

    申请日:2022-07-25

    CPC classification number: H02J50/10 H02J7/007192 H02J50/60

    Abstract: A wireless charging method in a wireless power transmitter, the method including sensing an object in a charging region, measuring a quality factor value, receiving information including a reference quality factor value, detecting a foreign object using the measured quality factor value and the reference quality factor value, and transmitting a response signal that includes ACK information or NAK information depending on whether or not the foreign object is detected. Further, the wireless power transmitter transmits information including a first guaranteed power value when the response signal includes the ACK information, and transmits information including a second guaranteed power value when the response signal includes the NAK information, and the first guaranteed power value is greater than the second guaranteed power value.

    Wireless power transfer method and device therefor

    公开(公告)号:US11056931B2

    公开(公告)日:2021-07-06

    申请号:US16644380

    申请日:2018-08-21

    Abstract: The present invention relates to wireless power transmission technology, and more particularly, to a wireless power transfer method and a device therefor. The wireless power transfer method may include operating with a first driving voltage, determining whether a ping phase is entered, determining whether the wireless power transmitter is in a first state when the ping phase is entered; and operating with a second driving voltage when the first state is determined.

    Wireless power transfer system having wireless power transfer system-charger

    公开(公告)号:US10566825B2

    公开(公告)日:2020-02-18

    申请号:US16246166

    申请日:2019-01-11

    Inventor: Jay Park

    Abstract: A method of transferring wireless power using magnetic induction, can include selecting a coil among a plurality of coils partially overlapping each other; sensing a current flowing through the selected coil; receiving an amount of power requested by a wireless power receiver; and controlling an output voltage of a DC-DC converter based on the current flowing through the selected coil and the amount of power requested by the wireless power receiver, in which the controlling the output voltage of the DC-DC converter includes: dividing the output voltage of the DC-DC converter to generate a divided output voltage; and adjusting a level of the output voltage of the DC-DC converter with a feedback signal based on the divided output voltage, in which the dividing the output voltage includes damping the output voltage by a first resistor, a second resistor and a third resistor, and the first resistor is connected between an output terminal of the DC-DC converter and a feedback port of the DC-DC converter, the second resistor is connected between the feedback port of the DC-DC converter and ground, and the third resistor is connected between a controller and the feedback port of the DC-DC converter.

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