Avtomaticheskaya Svarka (Automatic Welding), #6, 2017, pp. 40-42
Stabilization of welding current of resistance spot welding machines at mains voltage fluctuations
Yu.N. Lankin, V.F. Semikin and E.N. Bajshtruk
E.O. Paton Electric Welding Institute, NASU
11 Kazimir Malevich Str., 03680, Kiev, Ukraine. E-mail: email@example.com
The paper deals with the approaches to development of open-loop systems of welding current stabilization in resistance spot welding machines at mains voltage fluctuations. A microcontroller regulator of resistance welding is described, which provides automatic determination of the initial angle between full-phase current and voltage of the machine, as well as welding current stabilization at mains voltage fluctuations. System of angle determination and current stabilization is implemented as finite state machine with digital model of the object of control, presented in the tabulated form. This enabled application of a simple general purpose eight-bit microcontroller for the regulator. 7 Ref., 1 Figure.
stabilization, welding current, mains voltage, resistance welding
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