A Wireless power transmission system comprises a base unit (1) with multiple magnetic field generator circuits and a device (10), separable from said base unit (1) having a receiving inductor, adapted to receive power inductively when said device (10) is in proximity to one of said generator circuits, wherein said base unit (1) comprises a controller (3), configured to determine a transmission circuit (2′) from said generator circuits when said receiving inductor is in proximity to said transmission circuit (2′), whereupon said transmission circuit (2′) is operated to generate a first magnetic field (8), having a first phase, to induce a current in said receiving inductor and at least one of the remaining generator circuits is operated as a compensation circuit (2″, 52, 82) to generate a second magnetic field (21), having an opposite phase to said first phase.