BigPatents India

A device for the feeding of auxiliary operating facilities for a fuel-electrically driven vehicle with a combustion engine (1) is stated, which device comprises a generator (2) driven by the combustion engine (1) and a rectifier (3) connected with a generator (2) on the AC voltage side, wherein the rectifier (3) on the DC voltage side is connected with a first and a second connection (5, 6) of a DC voltage circuit (4). Alternatively, first and second rectifiers (3a, 3b) connected with the generator (2) on the AC voltage side are provided, wherein the first rectifier (3a) is connected on the DC voltage side with a first and a second connection (5a, 6a) of a first DC voltage circuit (4a) and the second rectifier (3b) on the DC voltage side with a first and a second connection (5b, 6b) of a second DC voltage circuit (4b). Saving of space required and increased robustness and resistance to faults are achieved in that a first and a second step-down converter (7, 8) each is connected with the first and second connection (5, 6) of the DC voltage circuit (4), and that the first step-down converter (7) is connected with a first DC voltage rail system (9a) for the feeding of first auxiliary operating facilities (10a) and that the second step-down converter (8) is connected with a second DC voltage rail system (9b) for the feeding of second auxiliary operating facilities (10b). As an alternative to the second step-down converter (8) a further rectifier (22) connected with the generator (2) on the AC voltage side can also be provided, wherein then the first step-down converter (7) is still connected with the first DC voltage rail system (9a) for the feeding of first auxiliary operating facilities (10a) and the further rectifier (22) is connected with the second DC voltage rail system (9b) for the feeding of second auxiliary operating facilities (10b).