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- Title
THYRISTOR DIRECT CONVERTERS FOR SUPPLY OF RESISTANCE WELDING MACHINES.
- Authors
RUDENKO, P. M.; GAVRISH, V. S.
- Abstract
Machines for resistance and flash-butt welding, power of which can reach several hundreds of kilowatts, are widely used for manufacture of metallic structures and parts. In present time power supply schemes from alternating current main of 50 (60 Hz) frequency, single- and double phase, became the most wide spread for power supply of these machines. Now significant attention is paid to providing of electromagnetic compatibility of energy consumers, especially such powerful as resistance welding machines. This can be provided at uniform loading of three-phase main, including with the help of converters of frequency and number of phases. Aim of the present paper is development and analysis of frequency converters providing uniform loading of three-phase main for existing powerful resistance welding machines, the welding transformers of which are designed for supply from single-phase 50 Hz main. Shown are advantages and disadvantages of the converters operating on 30, 37.5 and 45 Hz frequencies. Pilot specimen of 37.5 Hz converter passed industrial tests during welding of railway rails.
- Subjects
THYRISTORS; WELDABILITY of metals; ELECTROMAGNETIC compatibility; RESISTANCE welding; CONVERTERS (Electronics); WELDING equipment
- Publication
Paton Welding Journal, 2013, Issue 8, p54
- ISSN
0957-798X
- Publication type
Article