Why does the frequency converter damage the motor bearings?
Damage to the motor caused by the inverter includes two aspects: stator winding damage and bearing damage. This damage usually occurs within a few weeks to ten months. The specific time depends on the inverter brand, motor brand, motor power, and inverter carrier frequency. , the length of the cable between the inverter and the motor, the ambient temperature and other factors. The mechanism of motor bearing damage caused by frequency converter: The reason why the frequency converter damages the motor bearings is that there is current flowing through the bearings, and this current is in a state of intermittent communication. The intermittent communication circuit will generate arcs and burn the bearings. There are two main reasons for current flow in AC motor bearings: one is the induced voltage caused by the imbalance of the internal electromagnetic field; the other is the high-frequency current path caused by stray capacitance. When the currents of the three-phase windings are e...