Anode, process for anodizing, anodized wire and electric device comprising such anodized wire

A method for anodizing a metallic conductor wire having a predetermined wire length, comprising steps of:

• spirally winding said metallic conductor wire onto a holder having at least three guide cams with guide slots, including
• spirally winding the metallic conductor wire on the holder to form turns that are fixed held at contact points by the guide slots such that the turns of the metallic conductor wire being spaced apart by a predetermined distance, said holder having a central shaft and bars arranged in parallel to the central shaft, the bars being connected to the central shaft by radially oriented arms;
• connecting both ends of said metallic conductor wire to a positive pole of a current source;
• and
• immersing said metallic conductor wire on said holder into an electrolyte.

An anodized conductor wire comprising:

• a metallic conductor wire having a predetermined length;
• an oxide layer disposed on said metallic conductor wire by batch anodizing of the metallic conductor wire, said oxide layer being thin and exhibiting a structure and adhesion to an underlying metal portion of said metallic conductor wire so as to be configured for continued adhesion to the underlying metal portion when said metallic conductor wire being shaped for use in at least one of a coil and a winding of a high-voltage electric machine;
• said oxide layer having an electrically insulating property configured to electrically insulate respective strands of a winding in the high-voltage electric machine, wherein
• said oxide layer being formed by batch anodizing when said metallic conductor wire being wound on a holder having at least three cam guides with guide slots, a central shaft and bars arranged in parallel to the central shaft and fixed to the central shaft by radially oriented arms, contact surfaces between said holder and said metallic conductor wire being contact points, said guide slots separating respective turns of said metallic conductor wire when spirally wound and immersed into an electrolyte and when both ends of said metallic conductor wire being connected to a positive pole of a current source.