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How many different types of AC capacitors are there? 

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This paper proposes a unified equivalent circuit model which is applicable to all types of capacitors by considering the effect of capacitor voltage ripple.
In terms of specific capacity, energy density, power density and cycle ability, the AMCMB/GMCMB capacitor is superior the other capacitors like AC/graphite, AC/AC.
A maximum energy density of 41.65 Wh kg −1 is obtained, which outperforms many other available asymmetric capacitors.
The results will provide insight into the effectiveness of certain types of capacitors used within a system.
The phase angle of capacitors fabricated with these electrodes was near −90° at 120 Hz, making EDLCs suitable for ac filter applications presently dominated by aluminum electrolytic capacitors.
These results demonstrate the cooperative K 4 Fe(CN) 6 and AQDS for enhanced performance of AC capacitor, and thus provide an alternative approach for efficient capacitors.