What happened when the motor suddenly stopped running during the running of the motor?
The motor runs well and suddenly stops running. When this happens, be sure to pay attention to the load. There is no big change. There is no jam on the machine. Check if there is anything blocking the load. Clean up. First, roughly judge whether there is a big problem in the mechanical aspect, and then consider the electrical details.
1. It is conditional to disconnect the motor and the load coupling as much as possible, and then move the motor shaft by hand to see if there is any problem of stuck. First, remove the inside of the motor or the bearing without oil dry grinding. If it is a device that has been left for a long time, it is necessary to check for the presence of oxidized rust corrosion.
2. If it is a newly assembled motor and load, it is necessary to check whether the assembly is overcharged, and there is a certain direction, such as the level is not aligned, the concentricity is not aligned, or the rotor and the rotor are too tight.
3. If the motor has a driver or the like, check the historical alarm record of the drive to see what the alarm content is. The correct medicine can be processed accurately and in time.
4, the newly installed system, we must also re-consider whether the motor specifications are small, run for a while to generate overload problems, you can measure the load current after the next start to see if the rated motor current is exceeded, do not rule out the small Marathi The stall caused by the car occurs, and if so, a high-power motor needs to be replaced.
5, from the main circuit point of view, there may be a short circuit, phase loss, overcurrent overload, motor control design, you need to consider these issues and add the corresponding protection function, you can first use the multimeter in the power outage, measure three Whether the resistance of the phase motor is balanced or not, it is normal to measure the insulation resistance of the coil to the ground with a shaker. If the three phases of the motor itself are unbalanced, or the insulation to the ground is not good, of course, it needs to be repaired. In addition, overload, phase loss, overheating, overcurrent protection and other protection devices are suitable for selection, whether the parameters are not matched, etc., must be carefully checked.
6. If it is a DC motor, check for overcurrent overload caused by severe wear such as carbon brush commutator. If it is a permanent magnet motor, it does not rule out the overcurrent overload alarm caused by the loss of magnetism.
7. If there are inverters, servo drives, etc., it may be caused by problems such as drivers and encoders. If you can't find the fault code, you can only find a new model with the same test.
8. On the control loop, it is more complicated. If it is a relay control circuit, it may be that the relay coil has been used for a long time, and the suction capacity is insufficient after the heat is generated, or the contact contact time is long and the resistance value becomes large, causing malfunction. In this case, the corresponding self-protection or interlocking relay needs to be replaced. If it is a PLC or CNC system, it is not excluded that it is a software problem, such as a logical error, or a malfunction of the interlocking switch outside. These need to judge and find the problem according to the circuit diagram.
9. The fluctuation of the power supply voltage may also cause the motor to stop working momentarily. The voltage breaks down the motor. This situation is relatively rare, but it has also been seen. The voltage fluctuation is very common to the control system. This will directly cause the control system to fail. Normal operation causes the motor to stop working.
