Study on Breakdown and Self-healing Performance of Metallized Film
Film capacitor has important applications in such fields as DC transmission,rail transit,pulse power device due to its small size,high energy storage density and good safety.The commonly used dielc-tric material of film capacitor includes biaxially oriented polypropylene(BOPP)films and polyethylene terephthalate(PET)films.In this paper,two types of dielectric films are taken as the research object,the inlfuence of metal layer thickness on the breakdown strength and self-healing performance of the film are studied by vacuum evaporation to prepare metallized films with different square resistance.The metallized film of both polymers is manifested as that reducing the thickness of the metal layer can improve the break-down strength of the film to a certain extent,and the self-healing energy is statistically significant and in-creases with the increase of voltage,while the self-healing energy of the high square resistance film is smaller and the self-healing performance is better.Repeated self-healing is also observed in the experi-ment with the occurred cause is explained.
film capacitorelectrode thicknessbreakdown strengthself-healing energy
万方数据
维普
