Capacitor breakdown trajectory

Why do we need a real-time capacitor degradation model?

There is a need for real-time capacitor degradation models that take into account the operating conditions (ambient temperature, voltage, ripple current, humidity, frequency, time, etc.) for more accurate stress analysis.

Can acceleration models predict the lifetime of a capacitor?

Data-Driven Models. Acceleration models are most often considered to predict the operating lifetime of capacitors under specific environmental conditions (temperature, voltage andhumidity) . But the major limitation with these models is the inability to track the capacitor degradation with time.

Which failure acceleration models are used in capacitor lifetime prediction?

Some common failure acceleration models used in capacitor lifetime prediction are the Arrhenius and Eyring models for temperature-dependent stresses, and the inverse power law for voltage and humidity stresses. Arrhenius proposed a chemical kinetics model thatshowed the temperature dependence of reaction rates.

What is a capacitance degradation model?

A capacitance degradation is proposed the modelwhere parameters are related to the capacitor at specific voltage and temperature conditions. The model parameters are a function of voltage and temperature and determined by fitting the curve to the experimental points at the applied aging test conditions.

Can a voltage damage a capacitor?

When working with a capacitor, you will typically see two values printed on the side. The first is the capacitance, obviously, and the second is a voltage. This is the “breakdown voltage,” and it is the maximum voltage that the manufacturer guarantees will not damage the capacitor. You might ask yourself, “How can a voltage damage this capacitor?”

What factors affect the life of a capacitor?

The state of health, or life, of these capacitors depends on stress factors like temperature, voltage, ripple current, charge- discharge, and humidity. Various degradation measures such as capacitance, equivalent series resistance, dissipation factor, and insulation resistance have been used to monitor the degradation state of capacitors.