Summary:...
Although the gear reduction motor can operate, once the operating current exceeds the rated range, it indicates that it has been overloaded. Long-term overload of the motor is very harmful. What are the reasons for the overload? What are the inspection methods? These are all when using the gear reduction motor. The knowledge points that need to be mastered.
The reasons for the overload of the gear reduction motor are as follows:
1. The main performance of the mechanical load is that the temperature of the motor is too high. We can find it by the magnitude of the operating current.
2. During operation, once the three-phase voltage is in an unbalanced state, it will cause the operating current of one of the phases to be too large, and eventually lead to overload. This situation is mainly manifested by the uneven heating of the motor, but this situation It is difficult to find out by the magnitude of the operating current.
3. Once the detection part of the internal current of the inverter is abnormal, it may cause the current signal to be abnormal and eventually cause overload.
The inspection method of
brushless DC gear motor overload is as follows:
1. Check whether the temperature of the gear reduction motor is too high. If the temperature rise is not obvious, check whether the preset electronic thermal protection function of the inverter is within a reasonable range. If the temperature of the motor rises significantly, it is likely that there is an overload. At this time, it is necessary to increase the transmission ratio or increase the capacity of the motor.
2. Check whether the three-phase voltage of the motor is in a balanced state. If you find that the three-phase voltage is unbalanced, you need to check whether the three-phase voltage at the output of the inverter is in a balanced state. If it is unbalanced, the problem often lies inside the inverter.
3. Check the three-phase voltage on the motor side. If the three-phase voltage is in a balanced state, you need to check the operating frequency. If the operating frequency is relatively low, then you need to reduce the U/f ratio.
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