Paper capacitors are one of the fundamental types of capacitors. Usually, in capacitors, conductive materials are separated by dielectrics. Based on variants used as dielectrics, different types of capacitors are formed. The structure of this capacitor is similar to other capacitors, such as plastic capacitors. The only difference between other capacitors and this capacitor is that the chosen dielectric is paper. Paper capacitors, also known as fixed capacitors, use paper as a dielectric to store energy in the form of an electric field. This type of capacitor is used with a capacitance value of 1nF to 1uF at the power line frequency, and it stores a fixed amount of charge. These capacitors tend to store a fixed amount of charge values, therefore they are classified as fixed type capacitors. To take care of or protect the dielectric from environmental influences, immerse it in wax or oil.
What is the working principle of paper capacitors?
Paper capacitors are composed of two metal plates, with paper used as the dielectric material between them. Among them, there are positive and negative plates. When a charge is applied to these plates, the positive plate is attracted to one side, while the negative charge is attracted to the other plate. This type of electrical energy is stored in the form of an electric field, and the collected electrical energy is used by discharging capacitors. These ranges from 500pF to 50nF. This will result in high leakage current.
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