Patent ID: 7746208

Claim:
A transformer winding comprising: a first planar section having a first outer edge and a first inner edge, the first planar section comprising a first series of cylindrical turns, each cylindrical turn of the first series comprising a first end and a second end, wherein the first end is at the first outer edge and the second end is at the first inner edge, and each cylindrical turn of the first series comprising a current path spiraling from the first outer edge to the first inner edge; a second planar section having a second outer edge and a second inner edge, the second planar section comprising a second series of cylindrical turns substantially parallel to the first series of cylindrical turns, each cylindrical turn of the second series comprising a first end and a second end, wherein the first end is at the second inner edge and the second end is at the second outer edge, each cylindrical turn of the second series comprising a current path spiraling from the second inner edge to the second outer edge; wherein the direction of travel of the spiral axis of the first series of cylindrical turns is substantially opposite to the direction of travel of the spiral axis of the second series of cylindrical turns; wherein the first and second planar sections are arranged so that the first ends of the first series of cylindrical turns are spaced apart along the first outer edge, the second ends of the first series of cylindrical turns are spaced apart along the first inner edge, the first ends of the second series of cylindrical turns are spaced apart along the second inner edge, and the second ends of the second series of cylindrical turns are spaced apart along the second outer edge, wherein the cylindrical turns traverse a portion of a circle; wherein each first end of the first series of cylindrical turns is adjacent to and interconnected to one of the second ends of the second series of cylindrical turns, so that when a cylindrical turn of the second series of cylindrical turns reaches the second outer edge, then the current path moves to the first planar section; wherein each second end of the first series of cylindrical turns is adjacent to and interconnected to one of the first ends of the second series of cylindrical turns, so that when a cylindrical turn of the first series of cylindrical turns reaches the first inner edge, then the current path moves to the second planar section, thereby interleaving the conductance of the current through the first and second planar sections; wherein the current flows in the same circular direction in the first and second series of cylindrical turns, and a single continuous current path is formed by the first and second series of cylindrical turns in the first and second planar sections.