Measurement and Analysis of EM Noise During Welding Operations

Welding machines are generally known to produce a lot of EM noise. Welding machines have their own EMC standards, and when performing welding tasks, there are various rules in place to protect surrounding electronic devices. However, there are no specific regulations regarding the noise generated during the welding process itself. We conducted measurements of the EM noise produced during welding to set up the environment for the EMC test, and after analyzing the results, we independently selected an appropriate level of protection. Furthermore, we confirmed that there were no significant changes in the ambient conditions of the EMC test lab over an extended period.