| 摘要 |
<p>In a drive arrangement for a rail vehicle, each driven wheel is coupled to a motor. The motors (2, 3) are either separately excited d.c. motors or three-phase asynchronous motors with a flat torque/rotation speed characteristic. In addition there are power converters (1, 11, 14), each of which powers at least two motors (2, 3) on one side of the rail vehicle. Each converter (1, 11, 14) is connected to a control unit (9) which on average receives the same reference moment Ms. The control units (9) are connected to detectors (15) of any differences in rotation speed between the motors (2, 3) connected to the relevant converter (1, 11, 14) and, when such differences occur between the motors (2, 3) the control unit (1, 11, 14) reduces the field. This arrangement reduces sudden changes in torque on the drive while passing over crossings or points or in curves, thus also reducing the load on the mechanical structure of the rail vehicle. in addition, the risk of slip and skidding is reduced.</p> |
