The Paton Welding Journal, 2003, №02

2003 №02 (01)

2003 №02 (03)

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The Paton Welding Journal, 2003, #2, 10-12 pages

Power system of flash-butt welding machines with a transistor inverter

V.K. Lebedev, A.A. Pismenny

E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
The paper gives analysis and comparison of various power systems of flash-butt welding machines by their power characteristics, namely single-phase systems of industrial frequency and three-phase systems with converters of frequency and phase number (with thyristor inverters and bipolar transistors). It is shown that a system with an inverter converter, using power transistors, has an advantage over the system with a thyristor converter in terms of distribution of currents in the mains phases, as power consumer. High power factor, close weight and dimensional indices of the lower-frequency transformer to those of commercial-frequency transformer and absence of powerful rectifier diodes in the secondary circuit are indicative of the good prospects for application of the transistor inverter with the set frequency of 30 Hz.
Keywords: flash-butt welding, symmetrical power system, transistor inverter, power factor

References

1. Paton, B.E., Lebedev, V.K. (1969) Flash butt welding electric equipment. Elements of theory. Moscow: Mashinostroenie.
2. Lebedev, V.K., Pismenny, A.A. (1998) Improvements to the power supply systems of flash-butt welding machines. In: Welding and related technologies for the 21st century. Harwood A.P.

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Suggested Citation

V.K. Lebedev, A.A. Pismenny (2003) Power system of flash-butt welding machines with a transistor inverter. The Paton Welding J., 02, 10-12.

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