Aluminum electrolytic capacitor
An aluminum electrolytic capacitor with a non-solid electrolyte always consists of two aluminum foils separated mechanically by a spacer, mostly paper, which is saturated with a liquid or gel
Aluminum electrolytic capacitors are an attractive solution here since they can fulfill the key requirements, such as high voltage ratings of up to 500 V, large capacitance of up to 820 µF and high ripple current capabilities at an operating temperature range of -40 °C to 105 °C.
As described above, the capacitance of the capacitor C e-cap is mainly determined by the anode capacitance C A when the cathode capacitance C K is approximately 10 times higher than the anode capacitance C A. Aluminum electrolytic capacitors with non-solid electrolytes normally can be charged up to the rated voltage without any current limitation.
Hybrid Aluminium Electrolytic Capacitors: Combine the features of aluminium electrolytic capacitors and solid aluminium electrolytic capacitors. They have an aluminium electrode and a solid electrolyte, typically a conductive polymer or a combination of polymer and liquid electrolyte.
Aluminum electrolytic capacitors tend to be readily available, and with high voltage values (on the order of 700 V). These polarized capacitors usually have a wide tolerance (± 20%), tend to exhibit large leakage currents (5 to 20 µA per µF), and have low self-resonant frequency (fRES < 100 kHz).
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