Below is an explanation of the main characteristics and fault detection methods for mining locomotives.
2022-07-18 15:19
The following explains mining locomotives main features and fault detection methods
Mining locomotives are small, have a short wheelbase, are compact and flexible, have fast and reliable braking and lifting, have a simple structure, are easy to maintain, and are suitable for branch roadways in medium and small mines and transportation and shunting in small mines.
mining locomotives What should I do if the DC traction motor of the vehicle does not rotate?
When using mining locomotives, some minor problems often occur, such as the vehicle's instruments showing normal readings, but the motor does not rotate. So what should you do when encountering this problem? By analyzing the working principle of the mining locomotive, the cause can be found. The cause of this problem is usually an internal vehicle fault, such as controller damage or instrument short circuit, which may cause this phenomenon. What we should do is find a series of troubleshooting methods. Common faults:
Instrument short circuit; short circuit after circuit damage; reversed battery polarity; controller damage; lamp holder short circuit.
mining locomotives Fault detection methods
1. First, check if there is a short circuit in the speed control handle and the motor hall's beginning. Generally, it is easier to cause a short circuit in the connector after rain and humidity, so pay attention to the waterproofness of the handle connector. If the controller is damaged, first check if the switch of the handle and the motor hall is short-circuited, and then replace the new controller; otherwise, the replaced controller will be continuously damaged.
2. Secondly, unplug the brake handle and socket. If the motor is still running, it indicates that the brake handle is faulty and should be replaced.
3. Check the power of the handle. If the 5V voltage of the handle power supply is abnormal, check the signal voltage of the handle and rotate the handle. The signal voltage should change from low to high between 0.8~4.2V. If the voltage remains unchanged and is less than 1V, it is a handle fault or handle line short circuit. If the voltage is greater than 1V and changes normally, detect the motor signal.
4. Detect the motor signal lines separately. Slowly rotate the motor by hand. The voltage of each phase should change between 0-5V. If the voltage remains unchanged, the motor is damaged and the motor or motor hall components should be replaced.
5. Use a multimeter to detect the voltage at the input end of the controller power supply. The voltage should be higher than 36V. If no voltage is displayed, check the input line and check the power supply voltage of the controller handle. The normal voltage is 5~6V. If the voltage is lower than 5V, unplug the handle socket. If the voltage recovers to 5V, it may be a short circuit in the motor's Hall components. If there is still no 5V voltage, the controller is faulty and should be replaced.
6. After trying the above methods, if the motor still does not rotate, check the Hall switch signal and the motor handle. If the power is turned on and the controller casing becomes very hot, it usually means that the power tube inside the controller is short-circuited, and the power should be immediately cut off.
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