公开(公告)号：US12230980B1

公开(公告)日：2025-02-18

申请号：US17448155

申请日：2021-09-20

Applicant: Apple Inc.

Inventor： Ye Li ,  Gianpaolo Lisi ,  Bingyao Sun ,  Liang Chen ,  Gaurav Kalra ,  Rohan Dayal ,  Stephen C. Terry

IPC: H02J50/80 ,  H02J50/12

Abstract: A wireless power system can include a wireless power transmitter and a wireless power receiver. The transmitter can include a transmit coil, an inverter, and inverter control circuitry that can operate one or more switching devices of the inverter to communicate information to the receiver by controlling a delay between receipt of the burst request pulse and initiating operation of the inverter and/or controlling a polarity of a first pulse of the inverter. The receiver can include a receive coil magnetically coupled to the transmit coil, a rectifier, and rectifier control circuitry that initiates a burst request pulse to initiate operation of a transmitter. The rectifier control circuitry can operate one or more switching devices of the rectifier to communicate information to the transmitter by at least one of short circuiting an LC tank including the receive coil or controlling a polarity of the burst request pulse.

公开(公告)号：US20220103015A1

公开(公告)日：2022-03-31

申请号：US17386542

申请日：2021-07-28

Applicant: Apple Inc.

Inventor： Michael B. Nussbaum ,  Katherine I. Pregler ,  Liang Chen ,  Todd K. Moyer ,  Bingyao Sun

IPC: H02J50/12 ,  H02J50/80

Abstract: A wireless power transfer system can include a wireless power transmitter (PTx) and a wireless power receiver (PRx). The PTx can include a transmit coil driven by an inverter configured to receive an input DC voltage and provide an output AC voltage as a plurality of bursts. The PRx can include a receiver coil magnetically coupled to the transmit coil such that the bursts induce a corresponding AC voltage and a rectifier configured to receive the AC voltage and output a DC voltage to a load. The PRx can also include burst request pulse generation circuitry configured to operate the rectifier so as to deliver a burst request pulse to the PTx via magnetic coupling between coils. The PTx can further include inverter control circuitry configured to sense the burst request pulse and, in response thereto, trigger the inverter to deliver an AC voltage burst.