Wireless power transmission/reception apparatus and method

Abstract

A wireless power transmission/reception apparatus includes a wireless power transmission unit. The transmission unit is configured to generate a wireless power signal to be transmitted, transmit the wireless power signal using magnetic resonance, receive a reflected wireless power signal from a wireless power reception unit, determine whether a load device is present, and transmit a further wireless power signal when it is determined that the load device is present in such a way that impedance and output power depending on variation in a distance to the load device are tracked, and wireless power is supplied to the load device in an optimized state. Accordingly, a separate transceiver module is not provided for the purpose of performing communication between a transmitting end and a receiving end, and a reception environment is automatically detected, thus enabling wireless power to be transmitted in an optimal wireless power transmission state.

What is claimed is: 
     
         1 . A wireless power reception device, the wireless power reception device being connected to a load device, comprising: a second resonant antenna for receiving a wireless power signal from a wireless power transmission device using magnetic resonance, and reflecting a reflected wireless power signal towards the wireless power transmission device; a rectifier for rectifying the wireless power signal received by the second resonant antenna; a power signal converter to which the load device is connected, the power signal converter converting the wireless power signal rectified by the rectifier into a power signal based on a power supply method and providing the power signal to the load device; and a reception controller for performing control such that the second resonant antenna receives the wireless power signal using magnetic resonance and power is supplied to the load device, and performing control such that the reflected wireless power signal is reflected towards the wireless power transmission device. 
     
     
         2 . The wireless power reception device as set forth in  claim 1 , further comprising a switch disposed between the second resonant antenna and the rectifier and configured to interrupt transmission of the wireless power received from the second resonant antenna, wherein the reception controller interrupts the transmission of the power received from the second resonant antenna by controlling the switch when connection to the load device is released. 
     
     
         3 . The wireless power reception device as set forth in  claim 1 , wherein the power signal converter comprises: an Alternating Current (AC) converter for converting the rectified wireless power signal into an AC signal; and an AC-DC converter for converting the rectified wireless power signal into a DC signal.