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| VFD Interference from Strong Magnetic Fields in an Aluminum Electrolysis Workshop https://na.nasomi.com/forum/viewtopic.php?f=7&t=28944 |
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| Author: | Kayleigh40 [ Wed Sep 30, 2026 8:24 am ] |
| Post subject: | VFD Interference from Strong Magnetic Fields in an Aluminum Electrolysis Workshop |
Hello everyone, I am encountering an issue with interference caused by strong magnetic fields. The variable frequency drive (https://www.oyostepper.es/category-79-b ... encia.html) is installed in an aluminum electrolysis workshop near high-current busbars, where magnetic field intensity is very high. During operation, the VFD's control board occasionally resets, causing the motor to stop; however, it can be restarted after the reset. I have checked the power supply and grounding, and both are normal. I suspect that the strong magnetic field is penetrating the control board's shielding and inducing interference voltage on the signal lines, leading to CPU malfunctions. I installed a ferrous shield, which improved the situation but did not completely eliminate the problem. I would like to ask for advice on how to protect a VFD in a strong magnetic field environment. Should I relocate the control board or use fiber-optic isolation? Thank you all in advance for your help and guidance. |
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