| 摘要 |
FIELD: traction electric drives. ^ SUBSTANCE: the invention is pertaining to the field of traction electric drives and may be used on electrotransportation vehicles with the direct-current engines fed from a network of a constant voltage. The multiengine electric drive contains two traction direct-current engines, three contactors, three diodes. In series connected armature windings of the direct current traction engines are connected to the first output of the first contactor, the output of an excitation winding of the second traction engine through the second contactor is connected to the anode of the first diode. The two traction direct-current engines, four resistors, twelve contactors are connected to the anode. The second output of the first contactor is connected through in series connected excitation windings of the first and the second direct current traction engines to the second contactor. The cathode of the first diode through in series connected the third contactor, excitation windings of the third and the fourth direct current traction engines. The fourth contactor is connected to the negative terminal of the power source and through in series connected the first resistor, the fifth contactor, the second resistor, the sixth contactor is connected to the general output of the seventh contactor and to the armature winding of the first traction engine. In series connected armature windings of the third and the fourth direct current traction engines are connected to the output of the seventh contactor and to the plus terminal of the power source. The second output of the armature winding of the fourth traction engine is connected with the general output of the second resistor and the sixth contactor, the second output of the armature winding of the second traction engine through in succession connected the eighth contactor, the third resistor shunted by the ninth contactor is connected to the cathode of the first diode and through the tenth contactor - with a general output of an excitation winding of the fourth traction engine and the fourth contactor, the other output of which through the eleventh contactor is connected to the general output of the excitation winding of the third traction engine and the third contactor and through in series connected the twelfth contactor, the fourth resistor, the thirteenth contactor - with a general output of the excitation winding of the first direct current traction engine and the first contactor, the other output of which through the fourteenth contactor is connected to the general output of the excitation winding of the second traction engine and the second contactor. The technical result ensures realization of the normal excitation at the live contactors with a capability of the direct current traction engines reversing. ^ EFFECT: the invention ensures realization of the normal excitation at the live contactors with a capability of reversing of the direct current traction engines. ^ 1 dwg |
