What to do if the motor is hot
Almost half of the motors are burned due to lack of phase operation of the motor
The lack of phase often causes the motor to fail to run or the speed of the motor to start slowly, or the power will increase if there is a buzzing sound. If the load on the shaft is not changed, the motor is in a severe overload state, and the stator current will reach 2 times or more of the rated value. The motor will heat up or even burn out in a short time. The main reasons for the lack of phase operation are as follows:
(1) One-phase power failure caused by the failure of other equipment on the power line, other three-phase equipment connected to the line will lack phase operation.
(2) One phase of the circuit breaker or contactor is missing due to the burning of the bias voltage or poor contact.
(3) Phase loss due to aging, wear, etc. of the motor's incoming line.
(4) A phase winding of the motor is open, or a phase connector in the junction box is loose.
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Other non-mechanical electrical failure causes
Motor temperature rise caused by other non-mechanical electrical failure causes may also cause motor failure in severe cases. If the ambient temperature is high, the motor lacks a fan, the fan is incomplete, or the fan cover is missing. In this case, the cooling must be forced to ensure ventilation or the blades must be replaced, otherwise the normal operation of the motor cannot be guaranteed.
In summary, in order to adopt the correct method for motor fault handling, you must be familiar with the characteristics and causes of common motor faults, grasp key factors, and regularly inspect and maintain. In this way, less detours can be taken, time can be saved, faults can be eliminated as soon as possible, and the motor can be in a normal running state. So as to ensure the normal production of the workshop.
