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:
Oct. 06, 2015
Filed:
Dec. 02, 2011
Matti Jussila, Helsinki, FI;
Jukka Nurmi, Helsinki, FI;
Matti Jussila, Helsinki, FI;
Jukka Nurmi, Helsinki, FI;
ABB OY, Helsinki, FI;
Abstract
An alternating current conversion method and system are disclosed that can adapt to varying voltages of the direct current sources. An exemplary system includes a first and second connection arrangements for the voltage sources such that the direct current can be supplied to the DC/AC converter selectively in the first connection arrangement or the second connection arrangement. The selection between the first and second connection arrangements is made on the basis of the voltage levels of the voltage sources such that a proper voltage is supplied to the DC/AC converter. The numbers of the voltage sources in the connection arrangements are selected such that the first and second connection arrangements have different numbers of the voltage sources connected in series, the voltage sources being also grouped in parallel groups.