Transferring electric energy to a vehicle by induction

A method of building a system for transferring electric energy to a vehicle travelling on a track in a direction of travel, wherein an electric conductor arrangement for producing a magnetic field and for thereby transferring the energy to the vehicle is provided, wherein at least one current line is provided for the electric conductor arrangement, the at least one current line being adapted to carry the electric current which produces the magnetic field or is adapted to carry one of parallel electric currents which produce the magnetic field and wherein:

• the at least one current line is arranged to extend at a first height level,
• an electrically conductive shield is provided for shielding the area below the conductor arrangement against the magnetic field, wherein the shield is arranged so that it extends below the first height level, and
• a magnetic core is provided so that it extends along the track in the direction of travel at a second height level and so that it extends above the shield, wherein the material of the magnetic core is placed in grooves, or recesses, or grooves and recesses of pre-fabricated modules so that the modules carry the material and wherein the at least one current line is fixed by the modules.