| Popis: |
A solventless ultraviolet curable epoxy coating for generator stator laminations was developed to achieve major energy conservation and assure uninterrupted production during periods of natural gas curtailment. The resultant cured stator coating demonstrates improved mechanical, electrical and thermal perfomrance over the present solvent based thermally cured coating. This paper examines the mechanical, electrical and thermal requirements of the application and reviews the processing advantages gained with solventless ultraviolet cured epoxy coatings. A review of the chemistry will provide the building blocks for the development of the final coating properties. Mechanical properties, including surface coefficient of friction, flexibility and compression creep will be discussed, highlighting the testing techniques developed to simulate service conditions. The improved electrical performance achieved with this solventless ultraviolet curable epoxy coating will be compared to the basic cured coating properties and specifics of coating processing. Limited thermal evaluation of the coating indicates improved high temperature performance which may make this coating a candidate for applications with higher temperatures than normally experienced with generator stator laminations. Finally, the pilot line experience with coating will be presented, along with the estimate of reductions in pollution emissions achieved. |
