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公开(公告)号：US09793717B2
公开(公告)日：2017-10-17
申请号：US14335655
申请日：2014-07-18
Applicant: QUALCOMM Incorporated
Inventor： Mark D. White, II , Edward Kenneth Kallal , Ryan Tseng , Joseph N. Maalouf
CPC classification number: H02J50/12 , G01R21/01 , G01R29/0814 , G01V3/12 , H02J5/005 , H02J7/0052 , H02J7/007 , H02J7/025 , H02J50/40 , H02J50/80 , H04B5/0037 , H04B5/0075
Abstract: An apparatus and method for lost power detection are described. In one implementation, an apparatus for wireless transferring power comprises a wireless power transmitter configured to wirelessly transmit power at a power level sufficient to power or charge a chargeable device. The apparatus further comprises a controller configured to determine a first and second power difference between a first and second power measurement and the second and a third power measurement of the power level provided by the wireless power transmitter at a first, second, and third sample time, respectively. The controller is further configured to determine a transmitter power difference between the first power difference and the second power difference. The controller is further configured to determine an absence or a presence of an object that affects consumption of power transmitted by the wireless power transmitter based at least on the transmitter power difference Δ_T.
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公开(公告)号：US20180198272A1
公开(公告)日：2018-07-12
申请号：US15404510
申请日：2017-01-12
Applicant: QUALCOMM Incorporated
Inventor： Mark D. White, II
CPC classification number: H02H7/1252 , A61N1/3787 , H01L29/87 , H02H9/04 , H02H9/041 , H02H9/043 , H02H9/046 , H02J50/10
Abstract: The present disclosure describes aspects of Zener overvoltage protection (OVP) with a thermal trigger for an implant. In some aspects, an apparatus comprises a rectifier disposed in a rectification circuit and configured to rectify alternating current (AC) power received at the rectification circuit to direct current (DC) power. The apparatus also includes a Zener diode and thermistor. The Zener diode is disposed in the rectification circuit between the rectifier and an output terminal, and is configured to clamp the DC power at a predefined voltage. The clamped DC power output at the output terminal is usable by the implant. The thermistor and Zener diode are disposed in temperature-measuring proximity. This enables the thermistor to measure a temperature of the Zener diode, which correlates to voltage at the Zener diode due to clamping. When the measured temperature exceeds a threshold temperature indicative of an OVP condition, remedial OVP actions are initiated.
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公开(公告)号：US09929601B2
公开(公告)日：2018-03-27
申请号：US14335732
申请日：2014-07-18
Applicant: QUALCOMM Incorporated
Inventor： Mark D. White, II , Edward Kenneth Kallal , Ryan Tseng
IPC: H02J50/12 , H02J50/80 , H02J50/40 , H02J5/00 , G01R29/08 , H02J7/02 , G01R21/01 , G01V3/12 , H04B5/00 , H02J7/00
CPC classification number: H02J50/12 , G01R21/01 , G01R29/0814 , G01V3/12 , H02J5/005 , H02J7/0052 , H02J7/007 , H02J7/025 , H02J50/40 , H02J50/80 , H04B5/0037 , H04B5/0075
Abstract: An apparatus and method for lost power detection are described. In one implementation, an apparatus for wirelessly transferring power comprises a wireless power transmitter configured to wirelessly transmit power at a first power level sufficient to power or charge a chargeable device. The apparatus further comprises a controller configured to obtain a first power measurement of the first power level. The controller is further configured to determine a first adjusted power measurement of the first power measurement based on one or more tolerance values of the wireless power transmitter. The controller is further configured to determine a second adjusted power measurement of a second power measurement of a second power level received by the chargeable device based on one or more tolerance values of the chargeable device. The controller is further configured to determine if a power difference between the first and second adjusted power measurements exceeds a threshold value.
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