SYSTEM FOR INDUCTIVELY TRANSMITTING POWER FROM A PRIMARY DEVICE TO A SECONDARY DEVICE, PRIMARY DEVICE, AND METHOD FOR OPERATING SUCH A SYSTEM

An inductive power transmission system is provided, comprising a primary device; a secondary device; and a control unit; wherein the primary device is arranged and designed to inductively transmit power, via a primary oscillating circuit, to a secondary oscillating circuit of the secondary device during power transmission; wherein the control unit is designed to record secondary power data of the secondary device and a frequency parameter of the primary device; wherein the control unit is designed to determine an actual distance between the primary device and the secondary device based on a distance characteristic field, the recorded secondary power data and the recorded frequency parameter; and wherein the distance characteristic field includes reference secondary power data as a function of reference frequency parameters and as a function of reference distances.