1. Common faults of motor heating up too high or smoke motor
Causes: 1. Excessive load; 2. Two-phase operation; 3. Blocked air duct; 4. The working temperature is too high; 5. Interphase or inter-turn short circuit fault of motor stator winding; 6. Motor stator winding grounding device; 7. The power supply voltage is too high or too low;
Maintenance method: 1. Relieve the load or select a large space motor. 2. Eliminate air ducts; 3. Adopt hypothermic countermeasures; 4. Use a digital multimeter and ammeter to check the power supply voltage at the input end.
Second, the motor shell brings the phenomenon of motor failure
Causes: The windings are damp, the insulation layer is aging and embrittle, or the transformer grounding wire collides with the junction box shell.
Overhaul method: drying, replacing the winding.
3. Common faults of motor oscillation motors
Reasons: 1. The motor rotor is unbalanced; 2. Shaft bending; 3. The transmission belt pulley is unbalanced; 4. The uneven air gap causes unilateral magnetic pull
Maintenance method: 1. Calibrate the dynamic and static balance; 2. When the bending of the straightening shaft or disassembling the shaft is not serious, you can turn it to 1-2 mm, and then add the sleeve; 3. Calibrate the balance 4. Center adjustment;
Fourth, the current three-phase unbalanced motor common faults
Reasons: 1. Lack of power supply voltage; 2. The number of turns of the three-phase coil is different; 3. Incorrect internal wiring.
Maintenance method: 1. Check the power supply voltage; 2. Dismantle and replace the motor or dispose of it; 3. Correct the wiring.
Fifth, the no-load current is too large motor common faults
Reasons: 1. The air gap of the stator and rotor is large, 2. The number of turns of the stator winding coil of the motor is too small; 3. Improper installation
Maintenance method: 1. Adjust and reduce it 2. Fit and wrap it from scratch; 3. Install from scratch;
6. Insulation resistance reduces common faults of motors
Reasons: 1. Stator seepage and moisture collection; 2. Too much dust; 3. Destruction of the insulation layer; 4. Aging and embrittlement of the insulation layer;
Maintenance methods: 1. Drainage and damp removal; 2. Remove accumulated dust; 3. Patching; 4. Dismantling and replacement;
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