Relationship between Capacitor loss and external factors

1. Relationship between capacitor loss and frequency.

The loss of polar dielectric capacitors is determined by the dielectric and auxiliary media in the range of low and medium frequency. In general, the loss of conductance occurs in the range of low frequency. In the high frequency range, the loss is mainly caused by the metal part.

The loss of nonpolar dielectric capacitors at low frequency is mainly determined by the conductivity loss of the dielectric, and the loss at high frequency is determined by the loss of the metal part.

2. The relationship between capacitor loss and voltage, generally speaking, voltage has a minimal effect on loss, but when the voltage is high enough to cause air gap ionization, the loss will increase.

3. The effect of humidity on capacitor loss. In wet environment, condensate water on the surface of capacitor increases the leakage current and leads to the increase of loss. At the same time, moisture entering the capacitor will also oxidize and corrode the metallized layer, resulting in increased loss. In order to prevent this effect, the capacitor must strengthen the moisture-proof.