Patent ID: 9275789
Filing Date: 2016-03-01
CPC Classification: G01V,H01F,H02J

Claim Text:
1. A method for controlling a contactless power supplying device, wherein the contactless power supplying device includes a setting surface on which an electric appliance is set, a plurality of power supplying areas that are adjacently defined in the setting surface, and a plurality of primary coils that are respectively arranged in the plurality of power supplying areas, and wherein the contactless power supplying device is configured to excite at least one of the primary coils and supply power using an electromagnetic induction effect to a secondary coil of a power receiving device arranged in the electric appliance, the method comprising: determining whether or not a metal piece is present in at least one of the power supplying areas; full-bridge-operating a full-bridge circuit to excite at least one of the primary coils when the electric appliance is on the setting surface; and half-bridge-operating the full-bridge circuit to excite at least one of the primary coils when the metal piece is present in at least one of the power supplying areas or when the electric appliance is not on the setting surface, wherein the half-bridge-operate includes continuing to half-bridge-operating the full-bridge circuit until the electric appliance is set on the setting surface.