RAIL VEHICLE WHICH HAS A PERMANENT MAGNET SYNCHRONOUS MOTOR AS TRACTION MOTOR

摘要

The invention relates to a rail vehicle which has a permanent‑magnet synchronous motor as traction motor. In this case, a switching apparatus is arranged between a converter and the traction motor, connects the traction motor to the converter in the driving mode and connects the traction motor to at least one braking resistance during generator operation of the traction motor. The invention provides that the switching apparatus can be operated pneumatically and is for this purpose connected to a main air control line of a compressed‑air braking system. In the driving mode, when the pressure in the main air control line is greater than a threshold value, the traction motor is connected to the converter. For braking, when the pressure in the main air control line is less than the threshold value, the traction motor is connected to the at least one braking resistance.