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1. (WO2010115760) INVERTER WITH TWO ASYMMETRIC BRIDGES AND A FREE -WHEELING PATH DECOUPLING THE DC INPUT FROM THE AC OUTPUT

Pub. No.:    WO/2010/115760    International Application No.:    PCT/EP2010/054115
Publication Date: Fri Oct 15 01:59:59 CEST 2010 International Filing Date: Tue Mar 30 01:59:59 CEST 2010
IPC: H02M 7/797
H02M 1/44
H02M 7/5388
Applicants: SMA SOLAR TECHNOLOGY AG
MÜLLER, Burkard
Inventors: MÜLLER, Burkard
Title: INVERTER WITH TWO ASYMMETRIC BRIDGES AND A FREE -WHEELING PATH DECOUPLING THE DC INPUT FROM THE AC OUTPUT
Abstract:
A bidirectional inverter is disclosed, the inverter comprising DC terminals (DC+, DC-) and being connectable to a grid via grid AC terminals (U, V). The inverter comprises a first subinverter (S1) and a second subinverter (S2), both subinverters being connected in parallel to the DC terminals, and being connected in parallel to the grid AC terminals by subinverter AC terminals (AC1, AC2, AC1',AC2'). Each subinverter comprises a full bridge and a switchable freewheel path, both being configured to drive a current between the grid AC terminals in a driving direction, and configured to block a current between the grid AC terminals in a blocking direction opposite the driving direction. The driving direction of the first subinverter is the blocking direction of the second subinverter.