22 reasons why the motor is hot

Update:13 Oct 2018
Summary:

1, room temperature is too high 2, poor heat dissipatio […]

1, room temperature is too high

2, poor heat dissipation

3, overload

4, overvoltage undervoltage or voltage imbalance

5, frequent start and stop or frequent positive and negative

6, lack of phase

7, the fan is bad or the air inlet and outlet are blocked

8, bearing oil shortage

9, mechanical stuck blocked

10, the load moment of inertia is too large, the startup time is too long

11, short circuit between turns

12. The internal wiring of the new motor is incorrect.

13, the star triangle wiring is wrong

14, star triangle or self-even buck start load restart time is long or the fault is not normally converted

15, the motor is damp

16, squirrel cage asynchronous motor rotor broken strip

17. Wire-wound asynchronous motor rotor winding breakage or resistance imbalance

18, rotor broom

19, the power supply harmonics are too large, such as large rectifier equipment nearby, high-frequency equipment, etc.

20, the motor core flux reduction for multiple maintenance

21, some motor winding process is poor

22. High motor temperatures are generally unlikely to be bearing problems unless the bearing temperature is too high.