MW ▁transform er ▁outputs ▁ 6 ▁separate ▁tra ction ▁outputs ▁at ▁ 1 6 5 0   V , ▁and ▁a ▁separate ▁he ating ▁w inding . ▁The ▁ 1 6 5 0 V ▁output ▁is ▁rect ified ▁to ▁ 3 0 0 0   V ▁DC ; ▁under ▁ 3   k V ▁operation ▁the ▁input ▁is ▁connected ▁directly ▁through ▁an ▁intermediate ▁di ode ▁four ▁quadr ant ▁cho pper . ▁DC ▁sm o othing ▁is ▁via ▁ 8 . 5 5 0   MW ▁r ated ▁induct ances ▁located ▁under ▁the ▁locomot ive . ▁The ▁DC ▁link ▁supplies ▁six ▁I GB T ▁three ▁phase ▁in ver ters ▁( group ed ▁in ▁three ▁sets ▁of ▁two , ▁one ▁set ▁per ▁bog ie ), ▁each ▁driving ▁a ▁tra ction ▁motor . ▁The ▁system ▁allows ▁individual ▁ax le ▁control ▁including ▁anti - s lip , ▁as ▁well ▁as ▁elect rical ▁dynamic ▁bra king . ▁ ▁The ▁tra ction ▁mot ors ▁are ▁three ▁phase ▁asynchronous ▁machines ▁( D TA - 1 2 0 0 ▁model , ▁developed ▁by ▁NE V Z ). ▁They ▁are ▁susp ended ▁in ▁the ▁bog ies ▁and ▁dec ou ple d ▁from ▁the ▁non - rot ational ▁mot ions ▁of ▁the ▁driving ▁whe els . ▁The ▁connection ▁between ▁motor ▁and ▁reduction ▁g ear ▁is ▁via ▁a ▁dia ph rag m ▁coupling , ▁and ▁the ▁g ear box ▁output ▁drives ▁a ▁h ollow ▁sh aft ▁connected ▁to ▁the ▁ax le ▁via ▁a ▁flexible ▁coupling . ▁ ▁The ▁bog ie ▁susp ension ▁system ▁consisted