公开(公告)号：US10326316B2

公开(公告)日：2019-06-18

申请号：US15804596

申请日：2017-11-06

Applicant: Apple Inc.

Inventor： Heng Yang ,  Weihong Qiu ,  Zaki Moussaoui

IPC: H02J50/12 ,  H02J50/40 ,  H02J50/80 ,  H02J50/90 ,  H02J7/02 ,  H04B5/00

Abstract: A wireless power transmission system has a wireless power receiving device that is located on a charging surface. The wireless power transmitting device has an array of wireless power transmitting coils that overlap the charging surface. The wireless power transmitting device uses inductance measurement circuitry that is coupled to the coil array to measure coil inductances for the wireless power transmitting coils. The wireless power receiving device may contain a communications integrated circuit, display circuitry, or other sensitive components. The location and orientation of the wireless receiving device on the charging surface can be determined by analyzing the coil inductances. This information and information on the location of the sensitive component within the wireless power receiving device can be used to select a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device without exposing the sensitive component to excessive wireless power signals.

公开(公告)号：US20180233954A1

公开(公告)日：2018-08-16

申请号：US15804596

申请日：2017-11-06

Applicant: Apple Inc.

Inventor： Heng Yang ,  Weihong Qiu ,  Zaki Moussaoui

IPC: H02J50/12 ,  H02J50/90 ,  H02J50/40 ,  H04B5/00 ,  H02J50/80 ,  H02J7/02

CPC classification number: H02J50/12 ,  H02J7/025 ,  H02J50/40 ,  H02J50/80 ,  H02J50/90 ,  H04B5/0087

Abstract: A wireless power transmission system has a wireless power receiving device that is located on a charging surface. The wireless power transmitting device has an array of wireless power transmitting coils that overlap the charging surface. The wireless power transmitting device uses inductance measurement circuitry that is coupled to the coil array to measure coil inductances for the wireless power transmitting coils. The wireless power receiving device may contain a communications integrated circuit, display circuitry, or other sensitive components. The location and orientation of the wireless receiving device on the charging surface can be determined by analyzing the coil inductances. This information and information on the location of the sensitive component within the wireless power receiving device can be used to select a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device without exposing the sensitive component to excessive wireless power signals.

公开(公告)号：US20180219421A1

公开(公告)日：2018-08-02

申请号：US15690121

申请日：2017-08-29

Applicant: Apple Inc.

Inventor： Heng Yang ,  Weihong Qiu ,  Zaki Moussaoui

IPC: H02J50/12 ,  H02J50/60 ,  H02J7/02

CPC classification number: H02J50/12 ,  H02J7/025 ,  H02J50/60

Abstract: A wireless power transmission system has a wireless power receiving device that is located on a charging surface of a wireless power transmitting device. The wireless power receiving device has a wireless power receiving coil and the wireless power transmitting device has a wireless power transmitting coil array. Control circuitry in the transmitting device uses inverter circuitry to supply alternating-current signals to coils in the coil array, thereby transmitting wireless power signals. Impulse response measurement circuitry coupled to the coil array is used to make impulse response measurements while the control circuitry uses the inverter circuitry to apply impulse signals to each of the coils. The control circuitry analyzes output from the impulse response measurement circuitry to measure inductances associated with the coils in the coil array.