Motor common faults and treatment methods

What are the common faults and treatment methods of three-phase asynchronous motors? This is a problem that many people care about. The following is a detailed description of the failure and resolution of the motor for you.

Failure phenomenon: Can not start after the motor is switched on

Cause and treatment:

1. Stator winding wiring error - check wiring, correct error 2. The stator windings are open circuited, shorted to ground, and wound around the rotor windings of the electric motor - find the fault point and eliminate fault 3. The load is too heavy or the drive mechanism is stuck - check the transmission and the load 4. The rotor circuit of the wound rotor motor is open circuit (bad contact between brush and slip ring, disconnection of rheostat, poor wire contact, etc.) - Find the point of disconnection and repair it 5. The power supply voltage is too low - check the cause and rule out 6. Power phase - check the line, three-phase recovery <br> <br> Symptom: The motor temperature is too high or smoke causes and treatment:

1. Excessive load or too frequent start - reduce the load, reduce the number of starts 2. Phase loss during operation - check the circuit and restore the three phases. Stator winding wiring error - check the wiring and correct it 4. The stator windings are grounded, and short circuits between the turns or phases are detected - find the ground or short-circuit area and repair them. 5. Cage rotor winding breakage - Replace rotor 6 Winding rotor winding phase-to-phase operation - find the fault point and repair it 7. The stator and rotor phases are wiped - check the bearing, if the rotor is deformed, repair or replace. Poorly ventilated - check whether the ventilation is unblocked9. Voltage is too high or too low - Check the cause and eliminate <br> <br> Symptom: Motor excessive vibration causes and treatment:

1. Rotor imbalance - leveling balance 2. Pulley imbalance or shaft bending - check and correct 3 . The motor is not aligned with the load axis - check the adjustment of the axis 4 of the unit. The motor is not installed properly - check the installation and the foot screws 5. Sudden load overload - reduce the load

There are different reasons for the operation and how to deal with it:

1. The stator and the rotor phase wipe - check the bearing, whether the rotor deformation, repair or replacement 2. Bearing damage or poor lubrication - replace the bearings and clean the bearings 3. Motor runs out of phase - check the break point and repair it 4. Touch the fan housing - Check and eliminate fault <br> <br> motor speed is too low with load causes and treatment:

1. The supply voltage is too low - check the supply voltage 2. The load is too large - check the load 3. Cage rotor winding breakage - Replace rotor 4 One-phase contact or disconnection of the wound rotor wire group - check the brush pressure, brush contact with the slip ring and rotor windings,

The reason for the charging of the motor housing and its handling method:

1. Poor grounding or grounding resistance is too large - connect the ground wire according to the regulations, remove the bad grounding fault 2. Winding moisture - drying treatment 3. Insulation damage, lead touch shell - impregnated paint repair insulation, reconnect lead.