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DC Link Capacitor Sizing

ali_
ali_ Contributor Level 1
edited December 2023 in General

Hi,

I want use CRD07500AA12N-FMC with induction motor.

In the PRD-07561 user guide there are two equations for DC Link capacitor sizing (Page20).

ΔV and ΔI equations have not taken account the power or DC BUS current. How can I estimate the 

DC link capacitance according to different power levels? Also Capacitor RMS ripple current has a big role on the inverter operation life. 

How can I calculate the capacitor RMS ripple current with switching frequency, load current etc variables?


Best regards,

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