Electrostatic capacitor pictures

What are electrostatic capacitors?

Electrostatic capacitors dominates the market among the other capacitor technologies. The article provides introduction into construction of electrostatic capacitors, such as ceramic, film, paper technologies. Assembly styles, termination techniques or metallization processes are explained including impact to the basic paramters.

What type of electrodes are used in a high voltage capacitor?

The electrodes consist of real metal foils or one or double sided metallized plastic films or a combination of these types. Figure 13. High voltage wound capacitor with capacitor elements connected in series In principle, with this type of connection, we exchange parallel electrodes for series connected ones.

What is the total capacitance of a capacitor?

Suppose we have 6 capacitor elements consisting of 2×6 electrodes organized as in Figure 1. We understand that spread in one plane and connected together they will result in a total capacitance 6C. Generally, N electrodes give the capacitance N/2 C. Figure 1. One-plane extension gives the total capacitance 6 C

What is a precision capacitor?

Precision capacitors are, for example, wound on a core with a relatively high tensile stress which gives a dense and mechanically stable winding. The following figure shows schematically the approximate internal pressure distribution in some different winding types. Figure 11. Mechanical winding pressure in a film capacitor d) stacked-type.

Do plastic film capacitors decrease capacitance?

This same type of capacitance decrease has been observed also in metallized plastic film capacitors with radial leads in plastic casings. In a batch with an anomalous epoxy filling there were deep cracks down to occurring cavities localized against the end spray metal on the winding.

What are the characteristics of a foil capacitor?

In the different dielectric material groups we will account for the typical characteristics. The so called foil capacitor has electrodes consisting of aluminum, 5…10 μm (0.2…0.4 mils) thick.