How to find Capacitor rms current from Vripple?

15 July 2021 1 755 Report

I'm looking to find formulae to calculate capacitor rms current for DC bus capacitor. Input is Vripple. Application is Front end Boost PFC and Secondary end is Motor inverter.

Four frequencies of Irms flows into cap.

PFC - 100Hz, 100kHz

Inverter - 50Hz, 16kHz

I have to calculate this just from the Vripple pk-pk voltage information I could measure practically.

Reza Ghorbanpour Taheri

@q1

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