Dalan Motor summarizes 7 cases of high current of three-phase asynchronous motor. Do you have any supplements?
2021-01-29 13:19:07
When the current of the three-phase asynchronous motor is high, it is often manifested in the serious heat generation of the motor. The following 7 points summarize the reasons for the excessive current of the motor, and learn together.
1, the power problem
There are several reasons for the overheating of the motor in terms of power supply:
(1) The power supply voltage is too high
(2) The power supply voltage is too low
(3) Asymmetry of power supply voltage
(4) Three-phase power imbalance
2, the load problem
There are several reasons for the motor to overheat in terms of load:
(1) Motor overload operation
(2) The mechanical load of the drag is not working properly.
(3) The mechanical dragging is faulty
3, the motor itself problem
(1) Motor winding open circuit
(2) Motor winding short circuit
(3) Motor star angle connection error
(4) Motor coil connection error
4, ventilation and heat dissipation
(1) The ambient temperature is too high, so that the inlet air temperature is high.
(2) There are debris in the air inlet to block the air, which makes the air intake small.
(3) Excessive dust inside the motor affects heat dissipation.
(4) The fan is damaged or reversed, resulting in no wind or small air volume.
(5) The windshield is not installed in the unmounted hood or the motor end cover, resulting in no motor wind path.
5, repair the motor problem
The motor starting current of the repaired motor reaches 66% or more, and the motor is frequently operated, which also causes high current and generates motor overheating.
6, series resistance problem
Wire-wound motors and series resistors do not match, and the motor operates frequently, which also causes high current and overheating of the motor.
7, motor vibration problem
(1) Excessive motor vibration may also cause high motor current, reasons and treatment methods:
(2) rotor imbalance - leveling balance
(3) Pulley imbalance or shaft extension bending - check and correct
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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