Film energy storage capacitor installation

What are film capacitors used for?

Film capacitors are widely used in power electronics applications including but not limited to DC Link, DC output fltering, and as IGBT snubbers.

What are plastic film capacitors?

Plastic film capacitors are generally subdivided into film/foil capacitors and metalized film capacitors. Film / foil capacitors basically consist of two metal foil electrodes that are separated by an insulating plastic film also called dielectric. The terminals are connected to the end-faces of the electrodes by means of welding or soldering.

Which film material is used in the production of Vishay film capacitors?

Vishay film capacitors uses the following film materials in their production: Polyester film offers a high dielectric constant, and a high dielectric strength. It has further excellent self-healing properties and good temperature stability. The temperature coefficient of the material is positive.

Why are film capacitors used in DC fltering?

Film capacitors are widely used for DC fltering in power supplies. Their function is to smooth out the DC voltage waveform after rectifcation. As with all switching devices, IGBTs are subjected to voltage transients during turn-of operation. Voltage transients result from energy trapped in the circuit’s stray inductance.

What temperature should a film capacitor be stored in?

Burning droplets or glowing parts falling down shall not ignite the tissue paper. must not rise by more than 10 °C. Film capacitors should be stored under temperatures conditions from - 25 °C up to 35 °C, with relative humidity maximum of 75 % without condensation.

How does heat exposure affect AC film capacitors?

Permissible heat exposure loads on AC film capacitors are primarily characterized by the upper category temperature Tmax. Long exposure to temperatures above this type-related temperature limit can lead to changes in the plastic dielectric and thus change irreversibly a capacitor's electrical characteristics.