Analysis of several common causes of faults in wire-type electric vehicles and their solutions

We have discussed the three common faults of wired clicks before, click here to find out the article. The following is an analysis of different fault problems:

1. After the electric locomotive controller is closed, the motor car does not work. After the controller is closed, the in-line motor vehicle does not work mainly due to the disconnection of certain parts of the electrical circuit.

2. After the battery locomotive controller is closed, after one direction is not closed, the controller is not in one direction. The main contact of the reversible part is not in contact with the conductive piece on the reversing shaft, or the connecting wire is broken.

3. After the locomotive controller is closed, the switch tripping after the automatic switch trip is closed is mainly caused by the short circuit of some parts of the electric circuit and the overcurrent generated by the grounding.

4. After the electric locomotive controller is closed, the main reason for the quick starting speed is that the starting resistor itself is short-circuited, or a coil in the motor's excitation winding is short-circuited.

5. After the battery locomotive controller is closed, the slow starting speed is mainly caused by the short circuit or disconnection of some contacts and connecting wires in the controller cable and the line, resulting in single motor operation; or the shorting of the starting resistor should be shorted, If the speed of the first position is slow, this may be because the main contact of the controller is shorted to the ground. At this time, the first motor is running, and the second motor is short-circuited. When the load is constant, the starting speed is slow. The second position of the series start is slow, and the connection line of the starting resistors R2 - R3 may be broken. The third position of the series start is slow, which may be the disconnection of the main contact 2 and the starting resistor R3. The starting position of the fourth position in series is slow, and the connecting wire of the main contact 4 to the starting resistor R2 may be broken.

6. The running direction of the electric locomotive is opposite to the direction indicated by the reversible axis. The main reason is that the motor excitation winding or the commutating winding is connected to the positive and negative power lines.

7. When the main handle of the locomotive controller is at zero position, when the pantograph is in contact with the overhead line, the main reason for the automatic switch trip is that the automatic switch contact (magnetic coil) is grounded to the power line of the controller.