Drive arrangement

1. A drive arrangement for driving a work machine, said drive arrangement comprising:

a motor configured to generate a torque; and

a transmission apparatus configured to transmit the torque from the motor to the work machine, said transmission apparatus including a fluid coupling and at least one controllable torque transmitter configured to control transmission of the torque from the motor to the work machine,

wherein the fluid coupling is cooled by load-free driving by the motor.

2. The drive arrangement of claim 1 , wherein the at least one torque transmitter comprises at least one coupling selected from the group consisting of autoswitched coupling and externally-switched coupling.

3. The drive arrangement of claim 2 , wherein the autoswitched coupling is a free-wheel.

4. The drive arrangement of claim 2 , wherein the externally-switched coupling is a multiple-disc coupling.

5. The drive arrangement of claim 1 , wherein the at least one torque transmitter is provided in addition to the fluid coupling.

6. The drive arrangement of claim 1 , wherein the at least one torque transmitter is arranged between the motor and the fluid coupling.

7. The drive arrangement of claim 1 , wherein the at least one torque transmitter is arranged between the fluid coupling and the work machine.

8. A work machine, comprising at least one drive arrangement which includes a motor configured to generate a torque, and a transmission apparatus configured to transmit the torque from the motor to the work machine, said transmission apparatus including a fluid coupling and at least one controllable torque transmitter configured to control transmission of the torque from the motor to the work machine, wherein the fluid coupling is cooled by load-free driving by the motor.

9. The work machine of claim 8 , wherein the at least one torque transmitter comprises at least one coupling selected from the group consisting of autoswitched coupling and externally-switched coupling.

10. The work machine of claim 9 , wherein the autoswitched coupling is a free-wheel.

11. The work machine of claim 9 , wherein the externally-switched coupling is a multiple-disc coupling.

12. The work machine of claim 8 , wherein the at least one torque transmitter is provided in addition to the fluid coupling.

13. The work machine of claim 8 , wherein the at least one torque transmitter is arranged between the motor and the fluid coupling.

14. The work machine of claim 8 , wherein the at least one torque transmitter is arranged between the fluid coupling and the work machine.

15. The work machine of claim 8 , constructed in the form of a vertical mill.

16. The work machine of claim 8 , further comprising at least one further said drive arrangement.

17. A method for operating a drive arrangement for a work machine, comprising:

temporarily interrupting a torque transmission between a motor and a fluid coupling of the drive arrangement, or

temporarily interrupting a torque transmission between the fluid coupling and the work machine,

wherein the torque transmission is interrupted between the fluid coupling and the work machine by separating the motor from the work machine, and further comprising:

powering up the motor to a predetermined speed;

re-establishing the torque transmission between the fluid coupling and the work machine;

driving the work machine by using a torque transmission from the motor via a transmission apparatus to the work machine; and

driving the fluid coupling by the motor without load to cool the fluid coupling, during or after powering up the motor.

18. The method of claim 17 , wherein the torque transmission is interrupted between the motor and the fluid coupling by separating the motor from the fluid coupling and the work machine, and further comprising:

powering up the motor to a predetermined speed;

re-establishing the torque transmission between the motor and the fluid coupling, when the motor runs at the predetermined speed; and

driving the work machine by using a torque transmission from the motor via a transmission apparatus to the work machine.