Coil

A coil comprising:

• a multi-part conductor having an extension being long in relation to a cross-section of the multi-part conductor, the multi-part conductor comprising two or more conductors having equal cross-section, where the two or more conductors are electrically insulated from each other,
• wherein, in the instance of cross-section of the multi-part conductor, the two or more conductors have an adjacent arrangement with respect to each other in the direction of a central axis of the coil,
• wherein the multi-part conductor is wound around the central axis in more than one circumferential turn, such that a first portion of the multi-part conductor is arranged as a top layer and a second portion of the multi-part conductor is arranged as a bottom layer in the direction of the central axis,
• wherein the arrangement of the two or more conductors is the same in relation to each other and in relation to the direction of a central axis of the coil for each circumferential turn,
• wherein the multi-part conductor is wound around the central axis such that a distance between the central axis and the multi-part conductor in a first circumferential turn is larger than a distance between the central axis and the multi-part conductor in a second circumferential turn,
• wherein the multi-part conductor comprises an intermediate portion that connects the first portion with the second portion, the intermediate portion located at a position corresponding to a closest distance between the central axis and the multi-part conductor, and
• wherein the multi-part conductor further comprises connecting portions located at an outer side in relation to the central axis and at the same angular position in relation to the central axis.