Automatic Welding, 2022, №10



2022 №10 (04)

DOI of Article 10.37434/as2022.10.05

2022 №10 (06)

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Avtomaticheskaya Svarka (Automatic Welding), #10, 2022, pp. 35-41

Higher current harmonics in transformer power sources with pulsed devices of welding arc stabilization

A.M. Zhernosekov¹, O.A. Andrianov², S.V. Rymar¹, O.F. Shatan¹, A.O. Mukha¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²Ukrainian National Committee of International Chamber of Commerce (ICC Ukraine). 19B, Reitarska St. 01034, Kyiv. E-mail: office@iccuq.org

Transformer power sources of welding arc of industrial frequency alternating current generate into the mains the level of higher current harmonics, which is by an order of magnitude lower by the value of the coefficient of general harmonic distortion, than that of the inverter power sources. Here, their high electromagnetic compatibility with other equipment of the mains is achieved. Moreover, they are much easier to maintain and more reliable. Harmonic composition of current during a.c. welding was calculated at application of pulsed devices of arc stabilization. It is shown that application of stabilizing pulses with the polarity opposite to that of arc current, is more advantageous that the use of pulses with the polarity coinciding with that of arc current. Advantages as to welding process effectiveness and smaller generation of higher current harmonics are also observed. 18 Ref., 7 Fig.
Keywords: welding power sources, transformers, welding arc, stabilizing pulses, higher current harmonics


Received: 10.07.2022

References

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