1. Keep the permanent magnet motor working at rated current
The permanent magnet motor overload operation is mainly caused by the excessive load of the drag, the voltage is too low, or the mechanical jam caused by the drive. If the overload time is too long, the permanent magnet motor will absorb a large amount of active power from the power grid, the current will increase, and the temperature will rise. At high temperature, the insulation of the permanent magnet motor will age and the magnetic steel will lose its magnetism. Therefore, in the operation of the permanent magnet motor, it is necessary to pay attention to whether the transmission operation is flexible and reliable, whether the concentricity of the coupling is standard, and the flexibility of the gear transmission. If there is a stuck card, stop it immediately and find out the cause and then run it.
2. Always check whether the three-phase current of the permanent magnet motor is balanced.
For a three-phase AC permanent magnet motor, the difference between the current of any one phase of the three-phase current and the average of the other two currents must not exceed 10%, so as to keep the permanent magnet motor running safely. If it exceeds, it indicates that the permanent magnet motor is faulty and must be checked. Bright.
