Film capacitor self-healing test

How does self-healing performance of metalized film capacitors work?

Abstract: The self-healing performance of metalized film capacitors is studied by building a repeated charging and discharging setup and a self-healing signal testing setup. The charging and discharging setup imitates the working condition of the metalized film capacitor. The process is repeated until the lifetime of the capacitor came to an end.

How does a self-healing capacitor work?

The charging and discharging setup imitates the working condition of the metalized film capacitor. The process is repeated until the lifetime of the capacitor came to an end. During the experiment, the self-healing signal was detected and counted at the same time, which was achieved by building a self-healing signal detection setup.

How reliable are metallized film capacitors?

RP serves as a valuable tool for evaluating the safety of MFCs with an unknown SH history, contributing to the assessment of their reliability. Metallized film capacitors (MFCs) are known for their self-healing (SH) properties, enabling efficient and reliable operation, even under challenging conditions.

Does self-healing damage metallized polypropylene film capacitors?

Author to whom correspondence should be addressed. Self-healing (SH) in metallized polypropylene film capacitors (MPPFCs) can lead to irreversible damage to electrode and dielectric structures, resulting in capacitance loss and significant stability degradation, especially under cumulative SH conditions.

What is a metalized film capacitor (MFC)?

Provided by the Springer Nature SharedIt content-sharing initiative Policies and ethics Metalized film capacitors (MFC) are widely applied in power system, military weapons and railway traffics, etc. The lifetime of MFC is closely related to the self-healing (SH) process, which causes the loss of electrode area and thus leads to the capacitance...

Are metalized film capacitors a good choice for liquid impregnant capacitors?

To achieve such performances, metalized film capacitors (MFC) are adopted. Comparing with conventional liquid impregnant capacitors, the high energy density of MFCs is derived from the self-healing properties of metalized film.