Abstract: The invention relates to a coil apparatus for an inductive receiving apparatus, including a first coil with a plurality of first turns and a second coil with a plurality of second turns, wherein the first and the second coils are connected to one another in series and are wound in opposite directions relative to each other, wherein each turn includes an internally arranged conductor section and an externally arranged conductor section. With the objective of improving the interoperability of the coil apparatus, a portion of the first and second turns include respectively the internally and externally conductor section arranged such that the first and second turns respectively lie in one plane or span one plane, wherein these planes diverge with respect to one another in the direction from the first coil to the second coil or vice versa, depending on whether the conductor sections are in the portion of the first turns or of the second turns.

Abstract: The invention relates to a device for generating a magnetic field, in particular for a primary apparatus of an inductive charging system, as well as to a primary apparatus of an inductive charging system for the contactless, inductive power transfer to transport means. With the objective of continually generating a magnetic field along a specific traveling direction, the device is provided with at least one electrical conductor for generating the magnetic field, a supply unit for generating an alternating current for the at least one electrical conductor, and a detection unit for detecting a secondary charging system. This device is characterized by a communication unit for transmitting and receiving data to/from an identical device, wherein the device is designed to control the signal control unit by means of the detection unit and/or by means of the received data, and hence the generation of the magnetic field for inductive power transfer.