Patent ID: 7673488

Claim:
A wire winding apparatus for producing a magnetic excitation coil, comprising: a male die configured for a wire to be wound thereabout, a shape of the male die corresponding to an inside shape of the magnetic excitation coil; a female die configured to be moved towards the male die, a shape of the female die corresponding to an outside shape of the magnetic excitation coil; and a controller configured to: move the male die towards the female die; form a predetermined gap between the male die and the female die; guide a wire with a surface coating into the predetermined gap; wind the wire around the male die; supply current to the wire wound around the male die; fuse the surface coating of the wound wire due to Joule heat, the Joule heat being generated by the supply of the current to the wound wire; press the wound wire with the fused surface between the male die and the female die into a predetermined shape; and cool the pressed copper wire to fix the cooled copper wire in the predetermined shape.