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:
Apr. 06, 2015
Filed:
Nov. 29, 2012
Sma Solar Technology Ag, Niestetal, DE;
SMA Solar Technology AG, Niestetal, DE;
Abstract
On an inverter () for converting an electric direct voltage, in particular of a photovoltaic direct voltage source into an alternating voltage with a direct voltage input with two terminals (DC+, DC−) and one alternating voltage output with two terminals (ACAC) and with one bridge circuit including semiconductor switching elements (S-S), said bridge circuit comprising one first bridge branch (Z) including four switching elements (S-S) and one second bridge branch (Z) including two additional switching elements (SS) as well as a freewheeling circuit provided with additional diodes (DD), the efficiency is further increased without high frequency interferences and capacitive leakage currents having the possibility to occur on the generator side. This is achieved in that a respective one of the freewheeling diodes (DD) forms a freewheeling branch together with a respective one of the switching elements (SS) located in the first bridge branch (Z), said freewheeling branch carrying a freewheeling current in a condition decoupled from the direct voltage.