The common faults inside the three-phase asynchronous motor are mainly manifested in the following four aspects. The Dalan motor small series has been described in detail for your reference.
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The common faults inside the three-phase asynchronous motor are mainly manifested in the following four aspects. The Dalan motor small series has been described in detail for your reference.
1. Failure of rotor winding of three-phase asynchronous motor
1 When the squirrel-cage rotor is broken, the three-phase asynchronous motor will not start normally. Even if the three-phase asynchronous motor can be started, periodic electromagnetic noise and abnormal vibration will occur, which seriously affects the three-phase asynchronous motor. normal operation.
2 The main cause of rotor winding failure of three-phase asynchronous motor is due to frequent motor starting, improper operation or poor rotor winding quality of three-phase asynchronous motor.
2. Failure of stator winding of three-phase asynchronous motor
During the use of the three-phase asynchronous motor, due to the damp, long-term high-frequency overload operation or insulation aging of the stator winding part, lightning strike, etc., the insulation of the stator winding part may be caused to cause the stator winding part of the three-phase asynchronous motor and A short circuit is formed between the outer core of the iron core or the three-phase asynchronous motor. Mainly in the following three aspects:
1 three-phase asynchronous motor stator winding part short circuit
a. Short circuit refers to the short circuit phenomenon of the winding caused by the problem of insulation between the stator winding turns of the three-phase asynchronous motor or the different windings of the stator winding. When a short circuit occurs, the three-phase asynchronous motor will appear during operation. Abnormal sound and severe vibration, and the three-phase current of the motor is unbalanced. When the short circuit phenomenon is serious, the three-phase asynchronous motor will not work.
b. The main cause of the short circuit is that the motor is overloaded for a long time at a high frequency, and the power supply voltage of the three-phase asynchronous motor is greatly changed, which may cause damage to the stator winding of the three-phase asynchronous motor.
2 three-phase asynchronous motor stator winding open circuit
a. Open circuit refers to the disconnection point on the line of the stator winding part of the three-phase asynchronous motor. If the single circuit of the electronic winding has an open circuit, the three-phase asynchronous motor will run out of phase, so that the three-phase current of the three-phase asynchronous motor is not Balance, in this case it is easy to cause the three-phase asynchronous motor to burn.
b. The main cause of the open circuit is that the stator winding of the three-phase asynchronous motor is short-circuited or grounded, causing the stator winding to be burnt, or the stator wire is disconnected due to excessive external force. When the three-phase asynchronous motor has an open circuit fault, the three-phase asynchronous motor should be repaired in time to avoid further damage.
3 three-phase asynchronous motor stator winding line wiring error or inversion
a. Mainly due to the carelessness of the replacement of the stator windings in the three-phase asynchronous motor.
b. When the stator winding wire is reversed or embedded, the three-phase asynchronous motor will vibrate or be noisy during operation and the motor will be seriously unbalanced. The motor will be hot. The asynchronous motor is shut down for maintenance.
c. It is more common in such faults that the star and the angle are connected incorrectly, and the poles are connected in reverse.
3, three-phase asynchronous motor fixed, rotor core failure
1 When the iron core of the stator rotor of the three-phase asynchronous motor fails, the temperature of the faulty part of the iron core will rise sharply, and a serious eddy current will be generated at the faulty part.
2 The main cause of the failure of the stator or rotor core of the three-phase asynchronous motor is due to: core failure caused by other faults, poor iron core fastening, and loosening of the iron core when the motor generates vibration.
3 After the failure of the iron core, it will cause serious damage to the three-phase asynchronous motor, and it needs to be repaired and eliminated in time.
4. Faults in the bearing parts of three-phase asynchronous motors
The bearing part of the three-phase asynchronous motor is a wearing part, and the bearing of the three-phase asynchronous motor is rusted or stuck due to the unbalanced force of the motor and the harsh environment around the bearing after a long period of use. Problems with the bearings of the asynchronous motor will cause the motor to heat up abnormally or vibrate. In severe cases, the motor bearing will burn out.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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