Possible Causes:
1. Short circuit between stator winding machines, grounding of stator windings.
2. The stator winding wiring is wrong.
3. The load is too heavy and the rotor is blocked.
Approach:
1. Check for open circuit, short circuit, grounding parts and repair;
2. Check the winding wiring and correct it;
3. Reduce the load and eliminate obstacles.
Symptom 2: Motor temperature rise is too high or smoke
Possible reasons :
1. The load is too heavy;
2. Winding short circuit;
3, winding wiring error;
4. The windings are wired or short-circuited between turns;
5, motor rotor broken strip;
6, the word rotor phase rub;
7. The power supply voltage is too low.
Approach:
1. Reduce the load or replace the motor;
2. Repair the short circuit part;
3. Check the winding wiring and correct it;
4. Identify the fault and repair it;
5. Replace the rotor;
6. Measure the motor air gap and bearing wear and repair.
Fault phenomenon three: bearing overheating
Possible Causes:
1. There is a problem with bearing wear or quality;
2. The bearing grease is too much or too little, the model is wrong or the quality is not good;
3. The inner ring of the bearing is too loose or too tight;
4. The cooperation between the outer ring of the bearing and the end cover is too loose or too tight;
5. The assembly quality of the end cover and the inner cover of the bearing is not good.
Approach:
1. Replace the bearing;
2. Adjust the grease;
3. When it is too loose, it can be welded on the shaft to re-process the metal. When it is too tight, the bearing gear can be re-added;
4. When loosening, the bearing chamber of the end cover can be enlarged and then set, and the bearing chamber can be reworked when it is too tight;
5, remove and reload, so that the bearing is evenly stressed.
Fault phenomenon four: the motor casing is charged
Possible Causes:
1. Winding insulation damage;
2, the winding is damp;
3. The lead wire is damaged or the dust is too much.
Approach:
1. Repair the insulation and dry it with dipping paint;
2. Drying or dipping paint drying;
3. Replace the leads and clean the dirt.
Fault phenomenon five: the foot breaks
Possible Causes:
1. The anchor bolts are not tightened;
2. The installation plane is not flat enough.
Approach:
1. Regularly tighten the bolts;
2. Rework the mounting plane.
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