Patent 7391294 was granted and assigned to Wellington Drive Technologies Ltd on June, 2008 by the United States Patent and Trademark Office.
A winding for a toroidal electrodynamic machine is formed by providing a set of bobbins in a rectilinear array, winding the bobbins so that each phase is of one continuous wire, with each set of phases wound one bobbin at a time, the completed rectilinear array then being formed into a circular array for the machine. The rectilinear array has bobbins formed and is wired in such a way that bending into a torus is possible.