Patents by Inventor Jonathan Bretzius

Jonathan Bretzius has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Clean power common buss variable frequency drive system
    Patent number: 6600278
    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.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: July 29, 2003
    Assignee: ABB Inc.
    Inventor: Jonathan Bretzius