The path from the Favourable line to the bottom or even the Detrimental line to the ground is regarded as a higher-pass filter.The filter mitigates the large-frequency sounds between Favourable and Unfavorable lines to circumstance ground. I believe that the prevalent-mode choke is very first chosen according to its attenuation https://waylonsqpue.blog2learn.com/79206033/an-unbiased-view-of-emc-vs-emi-filter