Patent ID: 11936215
Assignee: HITACHI-LG DATA STORAGE KOREA, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A wireless power transmitting apparatus, comprising:
a power conversion unit including a buck converter for changing a voltage of DC power, an inverter for converting the voltage of the DC power into an AC power, and a resonance circuit including a primary coil for transmitting power by magnetic induction coupling with a secondary coil of a receiving device; and
a control unit configured to check a position of the receiving device while wirelessly transmitting power to the receiving device by controlling the power conversion unit, adjust a charging stop level downwardly which is compared with power loss which corresponds to a difference between transmitted power transmitted to the receiving device and received power received by the receiving device when it is checked that the receiving device is outside a charging area based on that the received power is equal to or greater than a reference power and a power control level when transmitting the power to the receiving device is equal to or greater than a reference value, stop transmitting the power when the power loss is higher than the charging stop level, and return the adjusted charging stop level to an original value when the power loss is lower than the adjusted charging stop level until a predetermined time elapses after adjusting the charging stop level.