Film capacitor AC voltage and frequency

In general, alternating current is a frequency with a direction change. How does the AC voltage of a film capacitor have a relationship with the frequency of an alternating current? Let's talk about the relationship between them.

The film capacitor has the function of blocking and blocking, because the direct current is unidirectional. When the circuit where the film capacitor is located is direct current, the film capacitor will always be charged in one direction, which will fill the capacity of the film capacitor. The capacitor after full charge is equivalent to an open circuit state. The alternating current can be discharged and charged because the current direction is constantly changing. The circuit in which the film capacitor is placed always has current flowing through it, which is equivalent to the path.

When the frequency of the alternating current is very low, the current through the film capacitor is also low. As the frequency of the alternating current increases, the current through the film capacitor also increases. When the current through the film capacitor reaches the rated current, the frequency of the alternating current can no longer be increased, because the increase will cause the loss of the dielectric, thereby affecting the service life of the film capacitor, so special attention should be paid to the alternating current when using the film container. The allowable frequency range prevents the life of the capacitor from decreasing, increasing unnecessary losses and labor maintenance costs.

Why do we need to understand the relationship between them? Because when we have a better understanding of film capacitors, we can safely, reasonably and widely use this type of capacitors, thus improving our work efficiency and reducing losses.