MULTI-COIL WIRELESS CHARGING SYSTEM COMPRISING PERMANENT MAGNETS

The present disclosure can provide a wireless power transmitter comprising: a plurality of primary coils for transmitting wireless power through magnetic coupling to a secondary coil of a wireless power receiver; and a plurality of permanent magnets arranged so as not to overlap with the plurality primary coils, wherein: the plurality of primary coils include a first bottom coil and a second bottom coil that are arranged side by side in the width direction so as not to overlap with each other on a first plane, and a top coil arranged on a second plane positioned above the first plane; one side of the top coil is positioned above the first bottom coil, and the other side of the top coil is positioned above the second bottom coil; the plurality of permanent magnets are arranged on a third plane positioned above the second plane; and the plurality of permanent magnets are arranged to be spaced by predetermined intervals along concentric circles around an axis that is perpendicular to the first plane between the first bottom coil and the second bottom coil.