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The analysis of transistor converter with modular structure for micro resistance welding in terms of its operational reliability was carried out, and the particularities, which have crucial importance for ensuring its reliable operation, were found out. The indexes of the converter's operational reliability were assessed. The measures for improving reliability were proposed and their advisability...
The structure and operation principles of multiphase interleaved power factor corrector were described. The dependence of input current quality on number of phases of multiphase interleaved power factor corrector was investigated. The rational number of phases of multiphase interleaved power factor corrector was determined for specified conditions.
The synthesis of effective circuit topology of DC power supply for micro resistance welding, which is able to provide high current formation accuracy and high electromagnetic compatibility, is carried out in the paper. The structures of proposed circuit main blocks are given. The effectiveness of the circuit is confirmed by simulation.
Direct Energy and Energy Storage circuit topologies of DC power supplies for micro resistance welding are analyzed and compared in the paper. The circuits' basic parameters of energy quality are evaluated. The advantages of Energy Storage circuit topology are shown, which make possible to recommend it for use in micro resistance welding machines.
Micro resistance welding is effective way to reliably join small-scale parts in electronics industry and instrument-making. High quality welded joints are obtained by coordinating welding current and electrodes squeezing force profiles. The decisions for minimizing inertia of welding machine units proposed in the paper allow achieving accurate coordinated control of current and force profiles.
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