Wireless power system with a self-regulating wireless power receiver

摘要

A method and a system for self-regulating wireless power transmitted to a wireless power receiver (WPR) are provided. An auto-tuning network is operably coupled within the WPR. The auto-tuning network includes an impedance network that dynamically increases, decreases, or maintains an amount of the received wirelessly transmitted power by detecting changes in a rectifier load disposed in the WPR and/or in a rectifier output voltage in the WPR. The auto-tuning network self-regulates the wireless power received from a wireless power transmitter (WPT) obviating the need for conventional communication messages. The WPT is hence free from a modulator/demodulator block and an out-of-band communication block and operates over a limited operating range to enable a simpler design for passing electromagnetic compliance regulations. The WPR implements a receiver-maximum-power-signature algorithm for enabling the WPT to detect unsupported receivers, configure its operating point and range, and terminate power transmission when not needed by the WPR.

主权项

1. A wireless power system comprising:
a wireless power transmitter configured to transmit wireless power; and one or more self-regulating wireless power receivers configured to receive wirelessly transmitted power, said one or more wireless power receivers each comprising:
an auto-tuning network operably coupled within said wireless power receiver, said auto-tuning network configured to control and regulate said received wirelessly transmitted power, anda rectifier operably coupled within said wireless power receiver, said rectifier configured to convert the said received wirelessly transmitted power from alternating current (AC) power into direct current (DC) power;wherein said auto-tuning network in said wireless power receiver is configured to detect changed in one or both of a load of said rectifier and an output voltage of said rectifier, and to dynamically counteract said detected changed if the changed exceed a safe operating range, said auto-tuning network counteracts said unsafe changes by dynamically tuning its network.