Maintenance has been done basically stepped on these pits, we talk one by one.
1. Drive body problems (the most common)
To be honest, 449 the most common situation is that the drive inside the IPM has been aging or damaged. Especially some of the equipment used for many years, the power module heat accumulated over time, capacitor aging, internal circuit fatigue. Sometimes you did not move anything, it reported itself.
Don't get entangled in this situation, the basic direction is to repair the driver or change the driver!
2. Mechanical load is too heavy, the drive "forced”.
Some customers do not believe that at first, think "how can it be a mechanical problem”, but the reality is very common.
For example, cutting too hard (parameters open too hard), screw oil or stalled, impurities in the guide rail, the shaft slightly hit.
All of these will cause the motor load to rise → current spike → IPM trigger protection. Characterized by sometimes reported in the processing, and sometimes a certain action is reported as soon as it is done.
3. Problems with the
motor or power line (short circuit / leakage)
This situation can not be ignored, especially the old equipment. It is common for the insulation of the motor winding to drop, the cable to be worn and torn, and the terminals to be loose. Once an abnormal current path occurs, IPM will be the first alarm protection.
4. Poor heat dissipation, drive overheating
Many people ignore this point, but actually quite critical.
You can see whether the drive fan is rotating, the cabinet is not a serious accumulation of dust, air circulation is not blocked. A high temperature, IPM will be directly "strike”.
5. Unstable power quality (more hidden)
Such as voltage fluctuations, interference, grounding is not good. This kind of problem is not necessarily reported every day, but will be "sporadic and very annoying”.
