Overhaul for the cause of the failure

Overhaul for the cause of the failure

1. Overhaul of electrical causes:

The first is to determine whether the three-phase DC resistance of the stator is balanced. If it is unbalanced, it means that the welding part of the stator is welded, the winding is separated by phase, and the winding is short-circuited. If the fault is obvious, it can be insulated. The surface is burnt, or the stator winding is measured with an instrument. After confirming the inter-turn short circuit, the motor winding is re-routed.

Typical Case:

Pump motor, the motor is not only vibrating, but the temperature of the large bearing is also high. The test shows that the DC resistance of the motor is unqualified, and the stator winding of the motor has a phenomenon of open welding. After the fault is found by the elimination method, the motor runs normally.

2. Maintenance of mechanical reasons:

Check that the air gap is uniform. If the measured value is exceeded, re-adjust the air gap. Check the bearing, measure the bearing clearance, if it is not qualified to replace the new bearing, check the deformation and looseness of the core, loose the core can be bonded with epoxy resin, check the shaft, repair the reaming of the curved shaft or directly straight shaft And then do the balance test on the rotor

3. Overhaul of the load mechanical part:

If the motor itself has no problem, then the cause of the fault is caused by the connection part. At this time, check the basic level of the motor, the inclination, the strength, whether the center is correct, whether the coupling is damaged, and whether the motor shaft extension is Meet the requirements and so on.

The company focuses on the production of stopcock motor and TV lift motor.