Patent ID: 9559553
Date: 2017-01-31
CPC Classifications: H02J

Claim:
1. A wireless power transmission apparatus comprising: a first power converting unit to generate high-frequency AC signals; a second power converting unit to generate low-frequency AC signals; a first coil receiving the high-frequency AC signals and transmitting a wireless power through a first power transmission scheme; a second coil receiving the low-frequency AC signals and transmitting the wireless power through a second power transmission scheme; and a control unit to control the first and second coils, wherein the control unit is configured to: activate the first power converting unit and transmit a detection signal for the first power transmission scheme to a wireless power reception apparatus through the first coil, detect a reception of a first response signal corresponding to the first detection signal during a first predetermined time period, determine a power transmission scheme of the wireless power reception apparatus as the first power transmission scheme, in response to a detection of the first response signal during the first predetermined time period, deactivate the first power converting unit, activate the second power converting unit, and transmit a second detection signal to the wireless power reception apparatus through the second coil, in response to no detection of the first response signal during the first predetermined time period, detect a reception of a second response signal corresponding to the second detection signal during a second predetermined time period, and determine the power transmission scheme of the wireless power reception apparatus as a second power transmission scheme, in response to a detection of the second response signal during the second predetermined time period.