METHOD AND APPARATUS FOR CONTROLLING WIRELESS POWER TRANSMISSION

A method of transmitting power of a wireless power transmitter, including a reception phase of receiving a signal including an FOD status packet from a wireless power receiver; a first determination phase of determining whether a foreign object is present in a charging area of the wireless power transmitter based on the FOD status packet; a power control phase of controlling power transmission in a first power transfer mode if it is determined in the first determination phase that the foreign object is present in the charging area, or controlling power transmission in a second power transfer mode if it is determined in the first determination phase that the foreign object is not present in the charging area; a phase of receiving a reception power packet including information on a reception power intensity from the wireless power receiver; a phase of determining the reception power intensity of the wireless power receiver based on information on the reception power intensity; a phase of measuring or calculating a power loss based on a difference between the determined reception power intensity and the transmission power intensity of the wireless power transmitter; a phase of correcting any one of a transmission power, a reception power, and a loss of power using the power loss; and a second determination phase of determining whether the foreign object is present in the charging area while controlling power transmission in the second power transfer mode by the power control phase.