The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2009
Filed:
Apr. 17, 2007
Dennis Braun, Brookfield, WI (US);
Rangarajan Tallam, Germantown, WI (US);
Ajith Wijenayake, New Berlin, WI (US);
Robert J. Johnson, Kewaskum, WI (US);
Dennis Braun, Brookfield, WI (US);
Rangarajan Tallam, Germantown, WI (US);
Ajith Wijenayake, New Berlin, WI (US);
Robert J. Johnson, Kewaskum, WI (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
An apparatus and method for converting DC voltage across positive and negative DC buses to three phase AC voltages on first, second and third AC output lines, the method comprising the steps of providing first and second three phase inverters that include a first subset of inverter switches and a second subset of inverter switches, respectively, linking a first choke in series with the first three phase inverter between the positive and negative DC buses and the AC output lines, linking a second choke in series with the second three phase inverter between the positive and negative DC buses and the AC output lines and synchronously controlling the first and second inverter switch subsets so that switching of first and second inverter switch subsets is substantially synchronized among the three phases.