1、 The rotor cannot rotate normally after the motor is started
After the switching power supply is connected, it is found that the rotor of the motor does not rotate and appears with noise. The causes of such common faults are as follows:
First of all, if the single-phase operation is caused by the open phase of the switching power supply, it is necessary to carefully check the switching power supply route, circuit breaker and wiring position, to see if there is open circuit, damage and other conditions, and to replace the damaged part.
Secondly, if the motor load is too heavy to operate, first reduce the load of the motor and start to operate under the condition of unloading or no-load.
Thirdly, there is another reason is that the motor rotor does not rotate due to the stalling of the driven machinery, so the closed power supply should be adopted, and the cause of the stalling should be eliminated first when the machinery is disassembled.
Finally, if there is a wiring error or short circuit or open circuit inside the motor stator, the motor will not be able to operate normally. It is necessary to remove the wiring, start the connection and check from the beginning to the end, and then start the next maintenance.
2、 Motor overheating
When the motor is running, it will form a lot of heat and even smoke. The causes of such common faults are as follows:
First of all, the motor power supply voltage is too low, it will form heat under the rated load, this kind of common fault should adjust the motor voltage immediately.
Secondly, the humidity of the working environment of the motor or the common faults of the motor fan will also lead to the overheating of the motor. We should eliminate the adverse conditions in the environment to ensure the operation of the motor fan.
Thirdly, if the load of the motor exceeds its bearing capacity, it will also cause scalding, and the load of the motor should be operated within the rated value.
Finally, the motor rolling in the operation of the positive and negative frequenc
