Patent ID: 6870294

Claim:
A method of producing a winding from preformed parts for a stator or rotor of an electric machine having slots, wherein a rotational axis of the electric machine defines an axial machine direction and radial machine directions perpendicular to the axial machine direction, the radial machine directions at a certain axial position defining a radial plane, wherein the finished winding comprises a plurality of overlapping coils with at least one complete turn, wherein the coils have connecting conductors located at faces of the stator or rotor, and wherein the connecting conductors of the overlapping coils are interlaced and therefore arranged in layers, said method comprising: using L-shaped preformed parts with two legs, one leg forming a slot bar and the other one a connecting conductor, producing the winding by repeatedly: (a) placing L-shaped preformed parts in the slots of the stator or rotor until an entire or partial winding layer has been placed, wherein the connecting conductors of the different interlaced coils are placed, with an offset, on top of one another in a direction lying in a common radial plane, thereby forming a stack of connecting conductors of different interlaced coils layered in directions lying within the radial plane, and (b) connecting the preformed parts placed in (a) with preformed parts placed in a previous stage, at connection areas, wherein the connection area are located, in the radial direction on top of the stack.