Abstract: Insulation systems that present an electrical stress grading through the disposition of resistively graded networks between insulating layers is described. The resistively graded networks may be implemented by coating insulating material with resistive material, and wrapping the insulation material around a conductor. The resistive material may be linear or non-linear material. Fabrication of the insulating material, the resistive material, and the coating process are also discussed, as well as the application of the insulation to the conductor are also discussed.

Abstract: Insulation systems that present an electrical stress grading through the disposition of resistively graded networks between insulating layers is described. The resistively graded networks may be implemented by coating insulating material with resistive material, and wrapping the insulation material around a conductor. The resistive material may be linear or non-linear material. Fabrication of the insulating material, the resistive material, and the coating process are also discussed, as well as the application of the insulation to the conductor are also discussed.

Abstract: The present disclosure relates to conductor bars, especially for assembly into electric machines. It is an object of the invention to provide an alternative method for fabricating a conductor bar with a vacuum pressure resin-rich process. A method for producing a conductor bar is disclosed, comprising packing a conductive bar with a B-stage resin-rich main wall insulation into a layer of release tape, a layer of breather/bleeder and thereon a layer of synthetic material which is forming a hermetical sealing around the pre-impregnated insulated conductive bar, placing the pre-impregnated insulated conductive bar with the layers described above into a vessel where the volume inside the synthetic layer is connected to a vacuum pump outside of the vessel and is evacuated while an overpressure is created inside the vessel with a heated compression gas causing a compacting and thermal curing of the resin-rich insulation around the conductive bar.

Abstract: A method for manufacturing a stator bar includes providing a conductor with an insulation around it, and wrapping an expandable tape around the insulation. The stator bar can be used to manufacture a stator.