WIRELESS POWER TRANSFER

A power transmitter () for wirelessly providing power to a power receiver () comprises an output circuit () comprising a transmitter coil () generating a power transfer signal when a drive signal is applied to the output circuit (). A load function circuit () determines a load function that describes a dependency of a loading of the drive signal by the output circuit () on a frequency of the drive signal for the power transmitter and power receiver arrangement. An interval circuit () determines two operating frequency ranges separated by a non-operating frequency range in response to the load function. A power controller () controls a power level of the power transfer signal by adjusting the frequency of the drive signal over at least frequencies within the operating frequencies while excluding frequencies within the operating frequency range.