Electrostatic Powder Coating as a Novel Process for High Voltage Insulation Applications

A novel strategy for manufacturing of the main insulation high voltage rotating machines is presented. The developed process based on established electrostatic powder coating equipment. Using complete automation enables precise and reproducible application homogeneous layers. Individual layers can be stacked by repetitions to achieve a desired layer thickness. This alters particle deposition introducing additional capillary bridges that significantly increases adhesion. systematic parameter study performed provide process-structure relations connecting various parameters with resultant thickness homogeneity. are iteratively improved maximize homogeneity minimize defect density; most critical in applications. obtained coatings target 1.5 mm subjected electrical testing examine partial discharge activity as key criterion functional insulating coating. measurements revealed no significant up an electric field strength 10 kV mm-1, demonstrating this production equipment surpasses state art terms activity. article protected copyright. All rights reserved.