| DOI: https://doi.org/10.15407/publishing2017.46.126
TO THE QUESTION OF INCREASING THE POWER FACTOR OF RESISTANCE WELDING MACHINE’S SINGLE-PHASE POWER SUPPLIES
S.K. Podnebenna, V.V. Burlaka, S.V. Gulakov
State Higher Educational Institution «Priazovskiy State Technical University»,
Universytetska, 7, Mariupol, 87500, Ukraine,
е-mail:
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This work aims to resistance welding machine’s power supplies power factor’s increasing. This is achieved by reducing of reactive power consumption. The disadvantages of resistance welding machine’s thyristor-based power supplies, are considered. The factors that caused these disadvantages were analyzed. Application of transistor-based power supply to resistance welding machine was considered. This power supply realized not only leading-edge modulation, like thyristor-based power supply, but trailing-edge modulation too, thus allowing to control the input current during the mains period. This allows to control of power supply’ active and reactive power. Unlike the thyristor-based power supply, transistor-based power supply can work in both modes: in VAR consumption mode and VAR generation mode. This makes possible to allow VAR power compensation by using transistor-based power supply in conjunction with thyristor-based power supply. References 11, figures 8, table 1.
Key words: resistance welding machine, power supply, power factor, VAR compensation.
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