Electromagnetic interference
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How much impact does electromagnetic interference have on frequency converters?
This post was last edited by The wind is gentle on 2018-6-22 at 13:48. Did you get it backwards? An inverter is a major source of electromagnetic interference; others avoid it, not because it is afraid of them, but because the inverter fears electrical pollution
That inverter is like a vicious dog – it’s crazy too, and it can even transmit sexually transmitted diseases. Who would dare to annoy or disturb it? Even its owner doesn’t dare to go near it~~~ :P
Inverters pollute the power grid, right? .......... Those who are experts in high-voltage electricity, please explain it simply
Not expressed clearly =. =! Our substation has a 690V inverter that keeps shutting down for no apparent reason. It was later determined that the issue stemmed from the 690V power cable being too close to the inverter’s control board, resulting in electromagnetic interference that caused sudden shutdowns. The solution adopted was to wrap the power cable with iron mesh and then ground it; since then, the inverter has been working perfectly. This incident has piqued my interest in electromagnetic interference, and I want to know which components are affected by such interference. (PS: The inverter’s control board was damaged due to electromagnetic interference.)
Not expressed clearly =. =! Our substation has a 690V inverter that keeps shutting down for no apparent reason. It was later determined that the issue stemmed from the 690V power cable being too close to the inverter’s control board, resulting in electromagnetic interference that caused sudden shutdowns. The solution adopted was to wrap the power cable with iron mesh and then ground it; since then, the inverter has been working perfectly. This incident has piqued my interest in electromagnetic interference, and I want to know which components are affected by such interference. (PS: The inverter’s control board was damaged due to electromagnetic interference.)
“\"Wrap the power cable with an iron mesh and then ground it\" – the iron mesh is also known as a magnetic isolation mesh – the cable’s shielding layer cannot block magnetic radiation
Inverters can generate harmonics with high power, causing significant interference to other devices in the system. Its interference mechanisms are the same as those of general electromagnetic interference, mainly including electromagnetic conduction, radiation, and inductive coupling.
What is an inverter? It is a power control device that controls AC motors by changing the frequency of the power supply to the motor. The inverter itself is a source of interference. For interference signals transmitted via radiation, they are primarily mitigated through cabling and by shielding the radiation source as well as the lines affected by interference. For interference signals transmitted through the lines, they are primarily addressed by installing filters, reactors, or magnetic rings on the input and output sides of the frequency converter.
However, for a local point in space, the intensity of the alternating magnetic field can be considered constant. The more wires pass through this area, the less induced energy each wire receives. Therefore, the more dense the cable shielding layer, the better; it is also required that the grounding be in contact with the surrounding area on 360 degrees
However, for a local point in space, the intensity of the alternating magnetic field can be considered constant. The more wires pass through this area, the less induced energy each wire receives. Therefore, the more dense the cable shielding layer, the better; it is also required that the grounding be in contact with the surrounding area on 360 degrees