Actively cooled coil system, method for manufacturing the coil system and electric motor with the coil system

Abstract

Coil system comprising a first coil with a plurality of stacked planar coils (1-6), wherein two immediately superimposed planar coils (1-6) are vertically stacked such that at least in sections one turn of a first planar coil (1) and two turns of a second planar coil (2) arranged directly above the first planar coil are arranged in partial overlap, wherein the coil system comprises a passive conductor structure (7) galvanically isolated from all current-carrying planar coils (1-6) of the coil system, which has a plurality of stacked conductor tracks (23) forming a first comb-like structure, wherein the first comb-like structure engages with a second comb-like structure at at least one edge region of the first coil.which arises from the lateral offset of the outer windings of the superimposed planar coils (1-6), characterized in that the lateral insulation distance (15) of the outer winding of each planar coil (1-6) to the passive conductor structure (7) is dimensioned such that it provides basic insulation of the first coil from the passive conductor structure (7), wherein the two comb-like structures are arranged relative to each other such that the lateral insulation distance (15) between the passive conductor structure (7) and the outer windings of the first coil is at no point less than 6 times the vertical distance between the directly superimposed planar coils (1-6).

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