Analysis of the metal foil winding of film capacitors

Film capacitors use metal foils as electrodes , which are laminated on both sides with plastic films such as polyethylene, polypropylene, polystyrene, or polycarbonate . These layers are then wound into a cylindrical capacitor.

As part of a scientific research project at a university, a digital measuring bridge and a programmable AC/DC high voltage and insulation tester from Tonghui are used to test the capacitance, loss factor, dielectric strength and breakdown voltage of the metal foil.