Patent ID: 9531444
Filing Date: 2016-12-27
CPC Classification: H01F,H02J,H02M,H04B

Claim Text:
1. A receiver to wirelessly receive power from a transmitter and transfer the power to a load, the receiver comprising: a receiving unit to receive AC power through a resonance frequency band from the transmitter; a rectifying unit to rectify the received AC power to DC power; a DC-DC converter to convert the rectified DC power into a specific DC power required by the load; a voltage restricting unit disposed before the load; and a controller to: detect a first rectified DC power, which is rectified from the received AC power, that is less than a predetermined threshold to prevent an instant overvoltage from being transferred to the load, transmit, via a modulation unit, a signal to increase the AC power to be received from the transmitter and control the voltage restricting unit to allow the detected first rectified DC power to be transferred to the load in response to the detected first rectified DC power being less than the predetermined threshold, detect a second rectified DC power, which is rectified from the received AC power, that is equal to or greater than the predetermined threshold to prevent the instant overvoltage from being transferred to the load, and transmit, via the modulation unit, a signal to decrease the AC power to be received from the transmitter and control the voltage restricting unit to prevent the detected second rectified DC power from being transferred to the load in response to the detected second rectified DC power being equal to or greater than the predetermined threshold, wherein the predetermined threshold is different than a charge quantity of the load.