Transient Emission From Welding Machines in the Frequency Range 2 to 9 Khz

• Published in: 2025 19th Conference on Electrical Machines, Drives and Power Systems (ELMA) pp. 1 - 6
• Main Authors: Novitskiy, Alexander, Schlegel, Steffen, Westermann, Dirk
• Format: Conference Proceeding
• Language: English
• Published: IEEE 19.06.2025
• Subjects: distortion measurement; electromagnetic compatibility; Frequency measurement; Harmonic distortion; Power electronics; Power measurement; Power quality; Power system harmonics; Standardization; Switching frequency; Transient analysis; Welding
• ISSN: 2997-6324
• DOI: 10.1109/ELMA65795.2025.11083498

The use of power electronic devices in industrial applications becomes more and more popular. The increase in the number of modern power electronic installations using the elements with switching frequencies in the range 2-150 \text{kHz} (socalled supraharmonic frequency range) leads to an increase of the conducted emission in this range from these appliances into power networks. It can disturb the operation of other equipment in the network and therefore the permissible emission level is the subject of standardization. At the design stage of a new industrial appliance as well as during its operation the emission assessment is required. Paper deals with the analysis of the conducted emission in the frequency range 2 to 9 kHz from a multi-point welding machine in a real industrial environment. It is shown that transient emission caused by the way of machine operating can dominate over the emission originated by the machine design and must be considered in the long-term emission assessment.