Oil-impregnated film capacitor and preparation method thereof

Details Oil-impregnated film capacitor and preparation method thereof Oil-impregnated film capacitor and preparation method thereof

H - Electricity

01

G

H01G 9/07 (2006.01) H01G 4/22 (2006.01)

Patent

CA 2467290

Different from conventional so-called mix-type film capacitors involving several disadvantages, in which the dielectric layers consist of a combination of a dielectric plastic resin film and an insulating paper sheet, the invention provides an all-film oil-impregnated capacitor in which the dielectric layers consist only of a plastic resin film such as a biaxially oriented polypropylene resin film (OPP film) suitable for use in microwave ovens. The all-film capacitor of the invention can be obtained and has satisfactory properties only when prepared by using specified materials including the OPP film, aluminum foil and capacitor oil and under specified conditions relative to the dielectric tangent values and dielectric capacity values before and after impregnation with a capacitor oil as well as the conditions in the step of oil impregnation.

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