US 11,658,515 B2
Wireless power transmission apparatus and method of operating the same
Hyunwook Moon, Seoul (KR); Euisung Kim, Seoul (KR); and Jaewoo Lee, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Feb. 18, 2021, as Appl. No. 17/178,775.
Claims priority of application No. 10-2020-0019887 (KR), filed on Feb. 18, 2020.
Prior Publication US 2021/0257858 A1, Aug. 19, 2021
Int. Cl. H02J 50/12 (2016.01); H02J 50/80 (2016.01); H02J 50/60 (2016.01)
CPC H02J 50/12 (2016.02) [H02J 50/80 (2016.02); H02J 50/60 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A wireless power transmission apparatus, comprising:
a transmission coil configured to transmit power to a wireless power reception apparatus;
an inverter that includes a plurality of switching elements and that is configured to output a current of a predetermined frequency to the transmission coil through an operation of the plurality of switching elements; and
a controller configured to:
calculate an output level of power transmitted through the transmission coil based on the current flowing through the transmission coil,
determine a load state of the wireless power reception apparatus by comparing a target level of power transmitted through the transmission coil against the calculated output level, the target level of power transmitted through the transmission coil being received from the wireless power reception apparatus, and
control the inverter based on the determined load state of the wireless power reception apparatus.