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. 31, 2017
Filed:
Mar. 09, 2016
Abb Technology Ag, Zurich, CH;
Andrea Becattini, Cavriglia, IT;
Sauro Macerini, Frazione Levane-Bucine, IT;
ABB SCHWEIZ AG, , CH;
Abstract
A DC/AC converter apparatus comprising: input terminals to be connected to a DC power source; a DC/AC conversion unit configured to receive input DC electrical power via the input terminals and to convert the input DC electrical power into AC electrical power, the DC/AC conversion unit comprising two output terminals; two AC backup output terminals; a switch arrangement to selectively connect the two AC output terminals to the grid terminals and to the two AC backup output terminals; a control unit associated to the switch arrangement and configured to: drive the switches of the switch arrangement, sense when an AC voltage at the grid terminals is below a predetermined threshold; and automatically drive the switches of the switch arrangement to disconnect the two AC output terminals from the grid terminals and to connect the two AC output terminals to the two AC backup output terminals when the AC grid voltage is below a said predetermined threshold.