Patent ID: 11949246
Assignee: LG ELECTRONICS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
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 based on a target level of power transmitted through the transmission coil and the calculated output level,
when the load state of the wireless power reception apparatus changes to a light-load or a no-load state while operating in a full-load state, determine that the load state of the wireless power reception apparatus is abnormal, and
control the inverter based on the determined load state of the wireless power reception apparatus.