APPARATUS AND METHOD FOR DETECTING FOREIGN OBJECT IN WIRELESS POWER TRANSMITTING SYSTEM

摘要

The present invention provides an apparatus and method for detecting a foreign object in a wireless power transmitting system. The wireless power transmitting apparatus measures an initial transmission power transmitted from the primary core block and performs foreign object detection on the basis of the initial transmission power, once it is found that an initial voltage of an output terminal of the wireless power receiving apparatus connected to an external load is within the range of a reference voltage. By performing foreign object detection while a wireless power receiving apparatus is in an initial setting completion state, before the output of the wireless power receiving apparatus is turned on, delay in detecting foreign objects may be reduced, and a risk due to heating of a foreign object may be avoided.

主权项

1. A wireless power transmitting apparatus detecting a foreign object comprising:
a primary core block coupled with a secondary core block equipped in a wireless power receiving apparatus through magnetic induction or magnetic resonance and configured for transmitting wireless power to the wireless power receiving apparatus by the magnetic induction or the magnetic resonance; an electric driving unit connected to the primary core block and configured for applying an alternating current (AC) signal required for the primary core block to transmit the wireless power; and a control unit connected to the electric driving unit and configured for generating a control signal for controlling the AC signal, wherein the control unit measures an initial transmission power transmitted from the primary core block and performs a foreign object detection on the basis of the initial transmission power, after the control unit determines that an initial voltage of an output terminal of the wireless power receiving apparatus connected to an external load belongs to the range of a reference voltage.