JONATHAN M BRETZIUS
Engineers in Fort Washington, PA
License number
Pennsylvania PE051697E
Category
Engineers
Type
Professional Engineer
Address
Address
Fort Washington, PA 19034
Professional information
Clean Power Common Buss Variable Frequency Drive System
US Patent:
6600278, Jul 29, 2003
Filed:
Mar 8, 2002
Appl. No.:
10/094374
Inventors:
Jonathan Bretzius - Fort Washington PA
Assignee:
ABB Inc. - Norwalk CT
International Classification:
H02P 154
US Classification:
318 34, 318 77, 318 61, 318 71, 318 68, 318825, 318802
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.