Axial gap machine phase coil having tapered conductors with increasing width in radial direction

DETAILED DESCRIPTION The present invention increases the torque capacity of an electric axial (gap machine and/or reduces its weight and/or size by replacing the uniform cross-section phase coil conductors with tapered conductors that expand laterally in width in the radial direction.
The tapered conductor wires of the coils eliminate voids between wires, so that during rotation, conductor wires are continuously crossing all or almost all of the magnetic lines of force extending between the permanent magnets across the coil wires during relative movement between the rotor and stator, and also increase the number of wires that can be used in a coil.
By overlapping coils, the tapered wires will also fill in the void created by the central area left open when a coil is formed as well as the voids that inherently exist between uniform cross-section conductor wires when they are fitted like radial spokes around an armature periphery.
By bonding the adjacent tapered conductors together with a material that seals as well as insulates the adjacent conductors, they form a fluid impermeable section.
By overlapping these sections and forming a seal between the adjacent and overlapping sections, they form a fluid-impermeable plate.
By using two such fluid-impermeable plates back to back, a cooling fluid passage can be provided.
Motors using the structure of the invention can be used in many applications such as locomotive traction motors, hybrid electric drives, underwater vehicles, tanks, ships, aircraft generators, stationary power sources, disc drives.
etc.