Detailed introduction of film capacitors(II)

The usual method of making film capacitors is to make aluminum and other metal foils as electrodes and plastic film overlapped and coiled together. But in addition, the film capacitor has a manufacturing method called metallized film, which is made of thin metal on a plastic film by vacuum evaporation on a thin layer of metal to be used as an electrode. Thus, the thickness of the electrode foil can be omitted, and the volume of the capacitance per unit volume can be reduced. For example, the common MKP capacitance is the metonymy of metallized polypropylene film capacitors, while MKT is the substitute for metallized poly (ethylene oxide) capacitors.

Metallized film capacitors are made of poly (ethylene glycol), polypropylene, polycarbonate and so on. Besides the winding type, they also have a laminated type. A metallized film of this type of capacitor has a so-called "my" my recovery effect, that is, if the tiny part of the electrode is short circuited by the weak electrical boundary, the electrode metal around the short circuit is caused by the electrostatic or short-circuit current carried by the capacitor at that time, resulting in a larger area of melting and evaporation. The insulation is resumed to restore the capacitor to the capacitor again.

A comprehensive understanding of film capacitors is also a very interesting process. The development of film capacitors is obvious to all, and the utilization rate is gradually increasing.