Patent ID: 7375449

Claim:
An axial field electrical machine comprising: a supporting structure; a magnet assembly; and, a conductor assembly spaced from the magnet assembly, wherein at least one of the magnet assembly and conductor assembly is rotatable on an axis relative to the supporting structure, wherein the conductor assembly has a disk-like support form with opposite sides and has a flat annular conductor in a double-helix wave winding that has a series of uniform conductor segments on each side of the support that are formed in a continuous uniform curve with one of an involute shape and arc shape, and wherein the magnet assembly has at least one permanent magnet positioned on the magnet assembly to generate a magnetic field substantially parallel to the rotation axis and directed at a portion of the wave winding and substantially centered on the central part of the conductor segments wherein the annular wave winding and support form have substantially coincident axes with the axis of rotation and wherein the conductor segments at the central part have a midpoint tangent that is at a significant angle from a radial of the rotation axis that is normal to the radial.