As discussed before, the capacitor degradation rate increases after the capacitance or ESR reaches the specified end -of-life criteria. Hence, the estimation of the capacitor degradation indicators (e. g., capacitance, ESR, tan δ) is of vital importance.
conditions. Hence, both capacitance loss and decrease in insulation resistance should be considered to access the complete health of metallized film capacitor. There is a need for real- time capacitor degradation models that take into account the operating conditions (ambient
The most common monitoring methods for degradation of capacitor with operational time include ESR-based monitoring. Changes in chemical and physical properties of the capacitor electrolyte will affect the value of ESR [50, 51]. The conductivity of the capacitor
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.
used for the accelarated degradation of these capacitors under electrical overstress conditions. Electrolytic capacitors of 2200 µF capacitance, with a maximum rated voltage of 10V, maximum current rating of 1A and maximum operating temperature of 105oC are used for the study. Capacitors are subjected to electrical stress at 10V.
degradation behavior of the capacitor considering either physics-of-failure models or statistical models and subsequently estimate its reliability and lifetime parameters. But most of these models fail to reflect the physical properties of the degradation path, which varies according to several intrinsic and extrinsic factors.