Self-healing capacitor specifications and capacity

Can film capacitors self-heal?

Film capacitors have the capability to self-heal, as some of them are able to remove or mitigate fault areas through a process referred to as self-healing. The ability of a film capacitor to self-heal is mainly determined by its dielectric and electrode materials.

How does the self-healing process affect capacitor performance?

At this point, the polymer absorbed oxygen and generated insulating materials, which isolated the defective portion from the remainder of the capacitor. Despite the loss of some effective capacitance, the self-healing process had a negligible impact on the overall performance, while substantially reducing the LC [40, 41].

How does self-healing affect the life of a metallized film capacitor?

The self-healing process in a metallized film capacitor leads to an increase in the equivalent series resistance (ESR). This increase in ESR, along with changes in capacitance, contributes to the reduction of the component’s lifetime.

Why should you choose a film capacitor with controlled self-healing?

Catastrophic failures and associated explosions or fires are unacceptable. Just as importantly, service lifetime and predictability for optimizing up-time are critical to the product's success. Film capacitors with controlled self-healing are the ideal solution to these challenges and can be obtained in various sizes and technical specifications.

Are capacitors safe & reliable?

In high voltage, high energy applications such as electric trains and solar power grids, the safety and reliability of capacitors are paramount. Catastrophic failures and associated explosions or fires are unacceptable. Just as importantly, service lifetime and predictability for optimizing up-time are critical to the product's success.

What are high voltage capacitors for energy storage?

High voltage capacitors for energy storage are generally divided into two distinct technologies: aluminum electrolytic and metal film. Electrolytic capacitors rely on an aluminum oxide dielectric grown on aluminum foil electrodes to form the basic structure.