公开(公告)号：US20190312459A1

公开(公告)日：2019-10-10

申请号：US16051350

申请日：2018-07-31

Applicant: Apple Inc.

Inventor： Brandon R. Garbus ,  Daniel Huber ,  Jason P. Marini ,  Stephen C. Terry ,  YiBo Liu

IPC: H02J50/10 ,  H02J7/02 ,  G06F3/0354

Abstract: A wireless power system has a wireless power transmitting device that uses an inverter to apply alternating-current signals to a coil. In response, the coil generates wireless power signals that are received by a coil in a wireless power receiving circuit of a wireless power receiving device. While wireless power is being transferred to the receiving device, the receiving device communicates with the wireless power transmitting device using in-band communications. The wireless power receiving device can issue a halt-wireless-power-transmission command using in-band communications to direct the wireless power transmitting device to stop transmitting wireless power. When power is not being transferred, the wireless power transmitting device transmits a series of short impulses that are monitored by the receiving device. The receiving device can direct the transmitting device to resume power transmission by adjusting an adjustable impedance circuit coupled to the wireless power receiving circuit.