Two major categories of film capacitors (I)

Film capacitor is an electronic component that is used in many household appliances and has a wide range of applications. Film capacitors have gradually replaced aluminum electrolytic capacitors. Thin film capacitors can be divided into two major categories, what is the role, together with Xiaobian to understand.

A film capacitor is a capacitor in which a metal foil is used as an electrode and a plastic film such as polyethylen, polypropylene, polystyrene, or polycarbonate is laminated from both ends and then wound into a cylindrical shape. The working principle of the film capacitor is the same as the general capacitor. It stores the electric energy by storing electric charge on the electrode. It is usually used together with an inductor to form an LC oscillating circuit. The working principle of the capacitor is that the electric charge moves in the electric field and acts as a conductor. When there is a medium, the charge is prevented from moving and the charge accumulates on the conductor, resulting in accumulation of charges.

Film capacitors can be divided into two types: DC film capacitors and AC film capacitors. DC film capacitors are thin film capacitors that operate in circuits powered by DC power supplies. They can be classified into general-purpose types, and suppress power supply electromagnetic interferences, impulses, and precision. Category IV; AC film capacitors are film capacitors that operate in circuits powered by AC power supplies, and are divided into functions such as motor startup and power factor compensation.