The problem of heat generation in three-phase asynchronous motors is already commonplace. Heat generation is a comprehensive performance of abnormal operation. There are many reasons for overheating of the motor. Today, Dalan Motor Editor has made a simple and easy-to-understand summary. I hope you will analyze the specific problems.
1. The ambient temperature or room temperature of the motor installation is too high.
2. The cooling air duct of the motor is blocked, the fan blade is damaged, and the shell is covered with the traitor, etc., which causes poor heat dissipation of the motor.
3. Overload operation.
4. Power supply overvoltage, undervoltage or three-phase voltage unbalance.
5. Frequent start and stop or frequent forward and reverse rotation.
6. Run without phase.
7. There are temporary objects around the motor, causing the air inlet and outlet to be blocked.
8. The bearing is short of oil.
9. The motor or load is mechanically locked and blocked.
10. The load inertia is too large and the starting time is too long.
11. Short circuit between turns of motor winding.
12. The internal wiring of the new motor is incorrect.
13. The winding star-delta connection is incorrect.
14. The restart time of the star-delta or auto-step-down start load is long or it is not converted normally due to a fault.
15. The motor winding is damp.
16. Broken rotor bar of squirrel cage asynchronous motor.
17. The rotor winding of the wound asynchronous motor is broken or the resistance is unbalanced.
18. Motor rotor bore sweeping.
19. The harmonics of the power supply are too large, for example, there are large rectifier equipment and high-frequency equipment nearby.
20. The performance of the motor core for multiple maintenance changes.
21. The motor winding after maintenance is not constructed according to the technical requirements.
----- Responsible Editor: Dalan Oil Pump Motor 02-Procurement Consultant
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