公开(公告)号：EP1485988B1

公开(公告)日：2019-05-08

申请号：EP03744225.8

申请日：2003-03-06

Applicant: ABB Inc.

Inventor： BRETZIUS, Jonathan

IPC: H02P5/74 ,  H02P27/04 ,  H02M5/44 ,  B04B1/20

公开(公告)号：EP1485988A1

公开(公告)日：2004-12-15

申请号：EP03744225.8

申请日：2003-03-06

Applicant: ABB Inc.

Inventor： BRETZIUS, Jonathan

IPC: H02P7/74 ,  H02M5/44 ,  B04B1/20

CPC classification number: B04B1/2016 ,  H02P5/74

Abstract: A N pulse variable frequency drive for driving two or more motors that is the combination of two or more variable frequency drives with each drive driving an associated one of the two or motors. One application is a decanter centrifuge which has a main motor to drive the bowl and a back motor to drive the conveyor. One of the two variable frequency drives drives the main motor and the other drive drives the back motor. The variable frequency drives are connected to a common buss and to a N pulse phase shifting transformer.