POWER INVERTER WITH MULTI-FED ON-BOARD POWER SUPPLY

摘要

An inverter (1) for feeding electric energy from at least one DC power source (3) into a DC power grid (4) comprises a DC/AC converter (5) connectable to the DC power grid (4); at least one DC/DC converter (9) arranged upstream of the DC/AC converter (5) and providing a galvanic isolation; a DC voltage link (10) at the input of the at least one DC/DC converter (9) and connectable to the at least one DC power source (3); at least one further DC voltage link (6) which is galvanically isolated from the first DC voltage link (10) by the DC/DC converter (9); on-board voltage rails (15) supplying a controller and other auxiliary devices of the inverter (1 ) with electric energy; and an on-board supply unit (14). The on-board supply unit (14) is configured and adapted to feed the electric energy into the on-board voltage rails (15) both out of the first DC voltage link (10) and out of the at least one further DC voltage link (6).