What are the common speed failures of three-phase motors? learned!

When there is a problem with the speed of the three-phase motor, it will affect the operation of the motor. The speed of the speed will cause the body to heat up. In serious cases, the motor will be burned out. What are the speed problems of the general motor? Take a look at the Dalan motor manufacturers.

1. After the motor is started, the load value is lower than the rated speed: there may be a problem with the voltage of the motor, the voltage drop leads to poor rotor circuit contact, the speed is different, and the winding may be connected incorrectly. In this case, you should first check whether the voltage is normal , Is there any problem with the winding connection, is the rotor circuit well connected? All must be checked clearly.

Second, the in-line current is different: if the motor voltage is found to be normal, but the in-line current is not the same, the speed is much lower than the rated speed, and the stator phase winding is in a cooling state. In this case, the winding wires should be connected incorrectly or the winding wires should be repaired in time.

3. If the motor makes a loud noise after starting, it will cause a speed problem. This is because the rotor has one phase broken, which leads to single-phase operation. The rotor should be identified and repaired.

4. The motor is difficult to start, and the speed is very low after starting. This is because the number of poles of the motor is changed after the motor burns the windings, and the stator and rotor are improperly matched.

Fifth, the motor sometimes suddenly rotates to zero speed. This is because the grid voltage decreases and the excitation voltage decreases. It is caused by the short-circuit and overload of the excitation winding. Safe maintenance is required.

All in all, the speed of the three-phase motor is related to the efficiency of the motor. If it does not reach a certain power, it will affect the work. The general problems and basic maintenance of the speed are the above 5 points. The current, rated speed, sudden noise, and sudden stop It is all a matter of motor speed.




----- Responsible Editor: Dalan Oil Pump Motor 02-Procurement Consultant

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