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:
May. 27, 2014
Filed:
Nov. 29, 2012
Yaskawa America, Inc., Waukegan, IL (US);
Mahesh M. Swamy, Gurnee, IL (US);
Yaskawa America, Inc., Waukegan, IL (US);
Abstract
An AC/DC converter system comprises an input circuit for connection to a 3-phase AC source. An autotransformer is coupled to the input circuit for developing first and second phase shifted AC supplies. A first AC/DC converter has a first rectifier connected to the first phase shifted AC supply converting AC power to DC power across a first DC bus having a first DC bus capacitor. A second AC/DC converter has a second rectifier connected to the second phase shifted AC supply converting AC power to DC power across a second DC bus having a second DC bus capacitor. First and second sets of switches are connected between the respective first and second DC buses and a main DC bus having a main DC bus capacitor. The first and second sets of switches are controlled so that only one of the first and the second DC buses is connected to the main DC bus to charge the main DC bus capacitor.