The stator got hot at some point.

1. Some phase armature windings are short-circuited.
2. The rotor is not centered.
3. Each coil unbalanced circuit
4. The coil joint is not tight.
5. Wrong connection of phase windings.    

• - Inspect and replace defective coils with new ones.
• - Check the bend of the shaft
• - Balance each coil of the circuit
• - Make the coil joints tight.
• - Connect the phase sequence of the windings correctly.

 

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