	US 12,136,834 B2
	Wireless power transfer
Antonius Adriaan Maria Staring, Eindhoven (NL)
Assigned to Koninklijke Philips N.V., Eindhoven (NL)
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Filed on Apr. 18, 2023, as Appl. No. 18/135,786.
Application 18/135,786 is a continuation of application No. 17/422,778, granted, now 11,664,687, previously published as PCT/EP2020/050003, filed on Jan. 2, 2020.
Claims priority of application No. 19152176 (EP), filed on Jan. 16, 2019.
Prior Publication US 2023/0299622 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 50/80 (2016.01); H02J 50/12 (2016.01)

CPC H02J 50/80 (2016.02) [H02J 50/12 (2016.02)]

20 Claims

1. A power transmitter, comprising:

an output circuit comprising a transmitter coil,

wherein the output circuit is arranged to generate a power transfer signal in response to a drive signal;

a driver circuit,

wherein the driver circuit is arranged to generate the drive signal,

wherein the drive signal is applied to the output circuit;

a configuration controller circuit,

wherein the configuration controller circuit is arranged to switch between a plurality of power transfer configurations of the power transmitter,

wherein at least two power transfer configurations have different combinations of a maximum power limit and a voltage amplitude of the drive signal;

a transmitter circuit,

wherein the transmitter circuit is arranged to transmit a power configuration message to a power receiver,

wherein the transmitter circuit is arranged to transmit the power configuration message to the power receiver via near field communication,

wherein the power configuration message comprises a first data,

wherein the first data is indicative of a first voltage amplitude for a first power transfer configuration among the plurality of power transfer configurations of the power transmitter

wherein the first power transfer configuration is one of the at least two power transfer configurations; and

a receiver circuit,

wherein the receiver circuit is arranged to receive a power transfer configuration change request message from the power receiver,

wherein the power transfer configuration change request message comprises a request to change a power transfer configuration of the power transmitter, and

wherein the configuration controller circuit is arranged to switch the power transmitter to the first power transfer configuration in response to the power transfer configuration change request message.