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Why does the motor vibrate?

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Peter Smith

Electromagnetic reasons
1. Stator aspect: the stator core becomes elliptical, eccentric, and loose; the stator winding is broken, ground breakdown, inter-turn short circuit, wiring error, and the stator three-phase current is unbalanced.
2. Rotor failure: the rotor core becomes elliptical, eccentric, or loose. The rotor cage bar is unwelded with the end ring, the rotor cage bar is broken, the winding is wrong, the brush contact is poor, etc.
Mechanical reason
1. Motor itself: unbalanced rotor, bent shaft, deformed slip ring, uneven air gap between stator and rotor, inconsistent magnetic center of stator and rotor, bearing failure, poor foundation installation, insufficient mechanical strength, resonance, loose anchor screw , the motor fan is damaged.
2. Coordination with the coupling: the coupling is damaged, the coupling is poorly connected, the coupling is not centered correctly, the load is unbalanced, and the system is resonant.
Reasons for motor mixing
1. Motor vibration is often due to uneven air gap, causing unilateral electromagnetic tension, and unilateral electromagnetic tension further increases the air gap. This electromechanical hybrid effect is manifested as stepper motor vibration.
2. The axial series movement of the motor, due to the rotor's own gravity or installation level and the wrong magnetic center, the electromagnetic tension caused by the rotor causes the axial series movement of the motor, which causes the motor vibration to increase. Rise rapidly.

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Peter Smith
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