T
treez
Guest
Hello,
This post relates to thread #41 of this post…….
https://www.edaboard.com/threads/352771/
…it says that SynQor believe that using an over-sized post-PFC electrolytic capacitor can result in extended lifetime protection against mains transients……
Easy Peasy replied as follows….
I just don’t see how adding extra post-PFC capacitors can help with mains transients?
This post relates to thread #41 of this post…….
https://www.edaboard.com/threads/352771/
…it says that SynQor believe that using an over-sized post-PFC electrolytic capacitor can result in extended lifetime protection against mains transients……
Easy Peasy replied as follows….
The thing is, these mains transients can be 1000’s of Amps, and even if only for a short time period, surely that would blow up the fine bond wires in the diodes of the mains rectifier bridge?Bigger caps with lower ESR soak up a lot of transient energy Phase-Neutral before the volts get too high on them, this is an old trick by power electronics engineers to meet Phase-Neutral transient standards...
I just don’t see how adding extra post-PFC capacitors can help with mains transients?