US 11,936,213 B2
Power capability detection with verification load in power level control systems for wireless power transmission
Andrew Kovacs, Lafayette, IN (US); and Jason Green, Evanston, IL (US)
Assigned to NuCurrent, Inc., Chicago, IL (US)
Filed by NuCurrent, Inc., Chicago, IL (US)
Filed on Dec. 19, 2022, as Appl. No. 18/084,321.
Application 18/084,321 is a continuation of application No. 17/245,953, filed on Apr. 30, 2021, granted, now 11,532,956.
Prior Publication US 2023/0231421 A1, Jul. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 50/80 (2016.01); H02J 50/12 (2016.01); H02J 50/70 (2016.01)
CPC H02J 50/80 (2016.02) [H02J 50/12 (2016.02); H02J 50/70 (2016.02)] 17 Claims
OG exemplary drawing
 
1. A power transmitter for wireless power transfer, the power transmitter comprising:
a verification load;
a control and communications unit configured to:
provide power control signals to control a power level of a power signal configured for transmission to a power receiver,
provide a power request to an external power supply,
determine if the power signal at the verification load is compliant with the power request,
store a flag of non-compliance for the external power supply if the power signal is non-compliant with the power request,
determine if the flag of non-compliance was caused by a shutdown of the power transmitter or a brownout of the power transmitter if the power signal is non-compliant with the power request, and
continue to operate for wireless power transmission, if the power signal at the verification load is compliant with the power request;
an inverter circuit configured to receive an input direct current (DC) power from the external power supply and convert the input DC power to a power signal; and
a coil configured to transmit the power signal to the power receiver.