Thefunctionoftransformeristoconvertahighvoltageof308vtoalowvoltageoftensofvoltssuitableforarcwelding.Thefunctionofthefastrecoverydioded5d6issecondaryrectifier,thatis,thehighfrequencyACcurrentof100khzisconvertedtoDCcurrentagain.TheDCoutputof30vafterrectifyingispulsatingDC,thecapacitorhasafilteractionof6,andther-dischargeresistancehasaveryhighvoltageinthefiltercapacitanceafterthemachineisturnedoff.Inordertobesafe,thestoredpowerisdischargedwiththisresistance.7,c2-highfrequencyfiltercapacitance)