1. see: daily inspections to see the motor, the current size and changes, look around there are no leaks, dripping, it will cause the motor insulation low breakdown and burn. Depends on whether the motor peripheral influential objects of ventilation environment? See the fan cover, the need to clean the outside of the blades and the motor is too dirty? To ensure that its cooling fin effect.

    2.Listen: listen carefully to the operation of the motor sound is abnormal, by means of a screwdriver or listen to stick aids affixed to both ends of the pro-motor listen, if you frequently listen to, not only find undesirable vibration of the motor and its driven equipment, and even the number of internal bearing oil can judge, so as to make timely Add bearing oil, or replaced with new bearings and other appropriate measures to deal with, to avoid motor bearings in oil dry grinding stall, take the outer sweep chamber burn.

    3.touch: mold temperature around the motor with the back of the probe. In the case of bearings in good condition, generally at both ends of the temperature will be lower than the temperature of the intermediate winding segment. If both ends of the bearing at high temperature, it is necessary to check the bearing combined with the measured bearing sound. If the overall temperature of the motor is high, it is necessary to combine work check the motor load current, equipment and ventilation dealt with accordingly.