초록 ▼

A device for the feeding of auxiliary operating facilities for a fuel-electrically driven vehicle with a combustion engine is stated, which device comprises a generator driven by the combustion engine and a rectifier connected with a generator on the AC voltage side, wherein the rectifier on the DC

A device for the feeding of auxiliary operating facilities for a fuel-electrically driven vehicle with a combustion engine is stated, which device comprises a generator driven by the combustion engine and a rectifier connected with a generator on the AC voltage side, wherein the rectifier on the DC voltage side is connected with a first and a second connection of a DC voltage circuit. Alternatively, first and second rectifiers connected with the generator on the AC voltage side can be provided, wherein the first rectifier is connected on the DC voltage side with a first and a second connection of a first DC voltage circuit and the second rectifier on the DC voltage side with a first and a second connection of a second DC voltage circuit. Saving of the space requirement and increase of the robustness and the susceptibility to faults is achieved in that a first and a second step-down converter each is connected with the first and second connection of the DC voltage circuit, and that the first and second step-down converter is connected with a common DC voltage rail system for the feeding of the auxiliary operating facilities. As an alternative to the second step-down converter a further-rectifier connected with the generator on the AC voltage side can also be provided wherein the first step-down converter and the further rectifier are then connected with the common DC voltage rail system for the feeding of the auxiliary operating facilities.

대표청구항 ▼

The invention claimed is: 1. A device for the feeding of auxiliary operating facilities for a fuel-electrically driven vehicle with a combustion engine, with a generator driven by the combustion engine, with a rectifier connected with the generator on the AC voltage side and assigned to the generat

The invention claimed is: 1. A device for the feeding of auxiliary operating facilities for a fuel-electrically driven vehicle with a combustion engine, with a generator driven by the combustion engine, with a rectifier connected with the generator on the AC voltage side and assigned to the generator, wherein the rectifier on the DC voltage side is connected with a first and a second connection of a DC voltage circuit assigned to the rectifier and connected downstream of the rectifier, wherein, a first and a second step-down converter each being connected with the first and second connections of the DC voltage circuit, and wherein respective stepped-down outputs of the first and second step-down converters are connected in common with a common DC voltage rail system for the feeding of the auxiliary operating facilities connected to the common DC voltage rail system downstream of the first and second step-down converters. 2. The device according to claim 1, wherein the respective step-down converter is formed through a series circuit of a controllable power semiconductor switch with a diode and through a capacity switched parallel to the series circuit of the controllable power semiconductor switch with the diode. 3. The device according to claim 2, wherein with the respective step-down converter the controllable power semiconductor switch is connected with the first connection of the DC voltage circuit and the diode with the second connection of the DC voltage circuit, and wherein with the respective step-down converter the diode is connected with the common DC voltage rail system through a first connection and the connecting point of the diode with the controllable power semiconductor switch through a second connection. 4. The device according to claim 3, wherein with the respective step-down converter a filter circuit is connection between the first connection and the common DC voltage rail system and to the second connection. 5. The device according to claim 3, wherein with the respective step-down converter a current direction limitation element each is connected to the first connection and into the second connection. 6. The device according to claim 3, wherein with the respective step-down converter an isolating element is connected to the first and second connections. 7. The device according to claim 1, wherein the respective step-down converter is formed through a first and a second series circuit each of a controllable power semiconductor switch with a diode and through a capacity each connected parallel to each series circuit, wherein the diode of the first series circuit is connected with the diode of the second series circuit. 8. The device according to claim 7, wherein with the respective step-down converter the controllable power semiconductor switch of the first series circuit is connected with the first connection of the DC voltage circuit and the controllable power semi-conductor switch of the second series circuit with the second connection of the DC voltage circuit, that with the respective step-down converter the connecting point of the diode of the first series circuit with the controllable power semiconductor switch of the first series circuit is connected with the DC common rail system through a first connection, and wherein with the respective step-down converter the connecting point of the diode of the second series circuit with the controllable power semiconductor switch of the second series circuit is connected with the common DC voltage rail system through a second connection. 9. The device according claim 8, wherein with the respective step-down converter a filter circuit is connected between the first connection and the common DC voltage rail system and between the second connection and the common DC voltage rail system. 10. The device according to claim 1, wherein the common DC voltage rail system has an overvoltage limitation network. 11. The device according to claim 1, wherein the generator is a single generator, the rectifier is a single rectifier, and the DC voltage circuit is a single DC voltage circuit. 12. The device according to claim 1, wherein the generator is a single generator. 13. A device for the feeding of auxiliary operating facilities for a fuel-electrically driven vehicle with a combustion engine, with a generator driven by the combustion engine, with a rectifier connected with the generator on the AC voltage side and assigned to the generator, wherein the rectifier on the DC voltage side is connected with a first and a second connection of a DC voltage circuit assigned to the rectifier and connected downstream of the rectifier, wherein, a first step-down converter is connected with the first and second connections of the DC voltage circuit, and wherein the first step-down converter and a further rectifier connected with the generator on the AC voltage side and assigned to the generator is connected with a common DC voltage rail system for the feeding of the auxiliary operating facilities connected to the common DC voltage rail system downstream of the first step-down converter and the further rectifier. 14. The device according to claim 13, wherein the further rectifier is connected with the common DC voltage rail system through a first connection and through a second connection. 15. The device according to claim 14, wherein with the further rectifier a current direction limitation element each is switched into the first connection and into the second connection. 16. The device according to claim 14, wherein with the further rectifier an isolating element is switched into the first and second connections. 17. The device according to claim 13, wherein the respective step-down converter is formed through a series circuit of a controllable power semiconductor switch with a diode and through a capacity switched parallel to the series circuit of the controllable power semiconductor switch with the diode. 18. The device according to claim 13, wherein the common DC voltage rail system has an overvoltage limitation network. 19. A device for the feeding of auxiliary operating facilities for a fuel-electrically driven vehicle with a combustion engine, with a generator driven by the combustion engine, with first and second rectifiers connected with the generator on the AC voltage side and assigned to the generator, wherein the first rectifier on the DC voltage side is connected with a first and a second connection of a first DC voltage circuit assigned to the first rectifier and connected downstream of the first rectifier and the second rectifier on the DC voltage side with a first and a second connection of a second DC voltage circuit assigned to the second rectifier and connected downstream of the second rectifier, wherein, a first step-down converter is connected with the first and second connections of the first DC voltage circuit and a second step-down converter is connected with the first and second connections of the second DC voltage circuit, and wherein respective stepped-down outputs of the first and second step-down converters are connected in common with a common DC voltage rail system for the feeding of the auxiliary operating facilities connected to the common DC voltage rail system downstream of the first and second step-down converters. 20. The device according to claim 19, wherein the respective step-down converter is formed through a series circuit of a controllable power semiconductor switch with a diode and through a capacity switched parallel with the series circuit of the controllable power semiconductor switch with the diode. 21. The device according to claim 20, wherein with the respective step-down converter the controllable power semiconductor switch is connected with the first connection of the corresponding DC voltage circuit and the diode with the second connection of the corresponding DC voltage circuit, and wherein with the respective step-down converter the diode is connected with the common DC voltage rail system through a first connection and the connecting point of the diode with the controllable power semiconductor switch through a second connection. 22. The device according to claim 21, wherein with the respective step-down converter a filter circuit is connected between the first connection and the common DC voltage rail system and to the second connection. 23. The device according to claim 21, wherein with the respective step-down converter a current direction limitation element each is connected to the first connection and into the second connection. 24. The device according to claim 21, wherein with the respective step-down converter an isolating element is connected to the first and second connections. 25. The device according to claim 19, wherein the respective step-down converter is formed through a first and a second series circuit each of a controllable power semiconductor switch with a diode and through a capacity each connected in parallel with each series circuit, wherein the diode of the first series circuit is connected with the diode of the second series circuit. 26. The device according to claim 25, wherein with the respective step-down converter the controllable power semiconductor switch of the first series circuit is connected with the first connection of the corresponding DC voltage circuit and the controllable power semiconductor switch of the second series circuit with the second connection of the corresponding DC voltage circuit, wherein with the respective step-down converter the connecting point of the diode of the first series circuit with the controllable power semiconductor switch of the first series circuit is connected with the common DC voltage rail system through a first connection, and wherein with the respective step-down converter the connecting point of the diode of the second series circuit with the controllable power semiconductor switch of the second series circuit is connected with the common DC voltage rail system through a second connection. 27. The device according to claim 26, wherein with the respective step-down converter a filter circuit is connected between the first connection and the common DC voltage rail system and between the second connection and the common DC voltage rail system. 28. The device according to claim 19, wherein the common DC voltage rail system has an overvoltage limitation network.