IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0991987
(2006-08-25)
|
등록번호 |
US-8469127
(2013-06-25)
|
우선권정보 |
DE-10 2005 044 180 (2005-09-15) |
국제출원번호 |
PCT/EP2006/065689
(2006-08-25)
|
§371/§102 date |
20090724
(20090724)
|
국제공개번호 |
WO2007/031397
(2007-03-22)
|
발명자
/ 주소 |
- Tarasinski, Nicolai
- Gugel, Rainer
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
16 |
초록
▼
A drive system for an agricultural or industrial utility vehicle is provided. The drive system comprises a drive assembly that generates a mechanical torque, a first and a second electric machine, a first mechanical output interface used to drive at least one vehicle axle and a second mechanical out
A drive system for an agricultural or industrial utility vehicle is provided. The drive system comprises a drive assembly that generates a mechanical torque, a first and a second electric machine, a first mechanical output interface used to drive at least one vehicle axle and a second mechanical output interface. A shaft driven by the drive assembly is rotationally connected to a shaft of the first electric machine. The second output interface is used to mechanically drive a tool which can be coupled to the utility vehicle. The shaft of the second electric machine can be reversibly connected to the first mechanical output interface. In order to allow for a connection modification of the second electric machine without producing interruptions or irregularities of torque, a third electric machine is provided the shaft of which can be reversibly connected to the first mechanical output interface.
대표청구항
▼
1. A drive system for an agricultural or industrial utility vehicle, with a drive assembly, having a drive shaft driven by an engine, generating a mechanical torque, a first and a second electrical machine, a first mechanical output interface drivingly connected with the drive assembly, and a second
1. A drive system for an agricultural or industrial utility vehicle, with a drive assembly, having a drive shaft driven by an engine, generating a mechanical torque, a first and a second electrical machine, a first mechanical output interface drivingly connected with the drive assembly, and a second mechanical output interface selectively drivingly connected with the drive assembly, the first and second electrical machines each having a rotor, each rotor being locked in rotation with a shaft, the drive assembly being in torque flow with the shaft of the first electrical machine, a work device being coupled to the vehicle and being driven mechanically with the second mechanical output interface, the shaft of the second electrical machine being selectively connected to the first mechanical output interface, wherein: a third electrical machine is provided, a shaft of which is selectively connected to the first mechanical output interface, and the shafts of the second and third electrical machines are coupled to each other synchronously. 2. A drive system according to claim 1, wherein the shafts of the second and third electrical machines are always coupled synchronously. 3. A drive system according to claim 1, wherein at least one of the electrical machines is operated as a generator and that at least one of the two other electrical machines is driven by the electrical energy generated by the at least one of the electrical machines. 4. A drive system according to claim 1, wherein an intermediate current circuit is provided, in which one of the electrical machines is operated as a generator and supplies the electrical current generated by it and with which at least one of the electrical machines is powered with electrical current, and the intermediate current circuit has a direct current circuit. 5. A drive system according to claim 1, wherein at least two of the electrical machines have at least one of essentially the same construction and essentially comparable power characteristics. 6. A drive system according to claim, wherein a switching device is provided with which at least two of the electrical machines are operated as motors and are connected to each other one of electrically in parallel and electrically in series. 7. A drive system according to claim 1, wherein two of the electrical machines are operated as motors, wherein for changing the load state of at least one of the electrical machines, two of the electrical machines are switched from one of an electrical series circuit into an electrical parallel circuit or and from an electrical parallel circuit into an electrical series circuit. 8. A drive system according to claim 1, wherein for changing windings of the electrical machines, wherein the electrical machines are operated as motors, are connected internally electrically one of in parallel, in series, in a star arrangement, and in a triangle arrangement. 9. A drive system according to claim 1, wherein for changing wiring of one of the electrical machines, wherein said one of the electrical machines is operated as a motor, one of the other two electrical machines coupled synchronously with said one of the electrical machines is initially controlled by a controller such that with said one of the other two electrical machines, an operation free of torque interruptions is possible in a no-load state of the electrical machine to be switched and that the wiring of the electrical machine to be switched is changed in the load state of the other electrical machine. 10. A drive system according to claim 1, wherein at least two of the electrical machines are operated as motors and are controlled by a controller such that possible torque non-uniformity of one of said at least two of the electrical machines is at least largely equalized by the other of said at least two of the electrical machines on the basis of the synchronous coupling. 11. A drive system according to claim 1, wherein one of the electrical machines is operated such that a given field weakening range is not exceeded. 12. A drive system according to claim 1, wherein at least two of the electrical machines are one of arranged in a common housing arrangement, and arranged spatially adjacent to each other. 13. A drive system according to claim 1, wherein at least two of the electrical machines are arranged spatially, such that their shafts are oriented essentially parallel to each other. 14. A drive system according to claim 1, wherein a fourth electrical machine is provided, which is coupled to at least one of the first and the second mechanical output interface. 15. A drive system according to claim 1, wherein for summing the torque generated by the drive assembly and the torque generated by an electrical machine, there is a summing gear with three mechanical interfaces, a first interface of the summing gear being coupled to the drive shaft driven by the engine, a second interface of the summing gear being coupled to the shaft of one of the electrical machines, and wherein a third interface of the summing gear is selectively coupled to at least one of the first mechanical output interface and the second mechanical output interface of the drive system. 16. A drive system according to claim 15, wherein the summing gear has a planetary gear, the drive shaft driven by the engine is locked in rotation with an internal gear of the planetary gear, a planet carrier of the planetary gear is selectively coupled to the first mechanical output interface, and wherein a sun wheel of the planetary gear is selectively coupled to one of the second, third, and fourth electrical machines. 17. A drive system according to claim 16, wherein a shaft of the fourth electrical machine is rotationally connected to the sun wheel of the planetary gear. 18. A drive system according to claim 15, wherein at least one of a planet carrier of a planetary gear and the drive shaft driven by the engine is selectively coupled to the second output interface. 19. A drive system according to claim 14, having a first operating state in which the first electrical machine is operated as a generator and the second and third electrical machines are operated as motors and connected to the first mechanical output interface. 20. A drive system according to claim 19, having a second operating state in which, with a part of the mechanical torque generated by the drive assembly, the fourth electrical machine is operated as a generator, in which the second and third electrical machines are operated as motors, and wherein the mechanical torque generated by the second and the third electrical machines is transmitted with another part of the mechanical torque generated by the drive assembly to the first mechanical output interface. 21. A drive system according to claim 20, having a third operating state in which the first electrical machine is operated as a generator, in which the fourth electrical machine is operated as a motor and wherein the mechanical torque generated by the fourth electrical machine is summed with the mechanical torque generated by the drive assembly and transmitted to the first mechanical output interface. 22. A drive system according to claim 14, wherein the fourth electrical machine is operated as a motor and wherein the torque generated by the fourth electrical machine and, if a corresponding coupling is engaged, at least one part of the mechanical torque generated by the drive assembly is transmitted to the second mechanical output interface. 23. A method for operating a drive system for an agricultural or industrial utility vehicle, the drive system having a drive assembly, having a drive shaft driven by an engine, generating a mechanical torque, a first and a second electrical machine, a first mechanical output interface drivingly connected with the drive assembly, and a second mechanical output interface selectively drivingly connected with the drive assembly, wherein the first and second electrical machines have rotors, each rotor being locked in rotation with a shaft, the drive assembly being in a torque flow with the shaft of the first electrical machine, a work device being coupled to the second output interface and being driven mechanically, the shaft of the second electrical machine being selectively connected to the first mechanical output interface, wherein: a third electrical machine is provided, a shaft of which is selectively connected to the first mechanical output interface, and the shafts of the second and third electrical machines are coupled to each other synchronously. 24. A method according to claim 23, wherein a switching device is provided, with which at least two of the electrical machines are operated as motors and are wired one of electrically in parallel to each other and electrically in series to each other. 25. A method according to claim 23, wherein two of the electrical machines are operated as motors, and wherein for changing the load state of at least one of the electrical machines, two of the electrical machines are switched from one of an electrical series circuit to an electrical parallel circuit and from an electrical parallel circuit to an electrical series circuit. 26. A method according to claim 23, wherein windings of an electrical machine being operated as a motor are internally connected electrically one of in parallel, in series, in a star arrangement, and in a triangle arrangement. 27. A method according to claim 23, wherein changing wiring of one of the electrical machines, wherein said one of the electrical machines is operated as a motor, the other electrical machine of said electrical machines is synchronously coupled to said one of the electrical machines is initially controlled by a controller, such that, with the other electrical machine, operation free of torque interruption for a no-load state of the one of the electrical machines, which is the electrical machine to be switched, is possible and that the wiring of the electrical machine to be switched is changed in the load state of the other electrical machine. 28. A method according to claim 23, wherein at least two of the electrical machines are operated as motors and are controlled, such that possible torque non-uniformity of an individual of the electrical machines is at least largely equalized by another of the electrical machines on the basis of the synchronous coupling, in which the two or more of the electrical machines are operated as motors and are coupled to at least one of the first and/or second mechanical output interface. 29. A method according to claim 23, wherein one of the electrical machines is operated such that a given field weakening range is not exceeded.
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