Abstract:
The suitability for welding of manual metal arc welding transformers
depends on the no-load voltage and on the electro-magnetic behaviour of
the reactor. The latter is related to the curvature of the actual
magnetization characteristic. The analysis aims at the quantitative
establishment of that dependency.
The fulfilling of the imposed task is performed through the approximate
evaluation of the current waveforms in the two simplified welding circuits
that have been designed with equal parameters except the data of the reactors.
The reactors have diverse magnetic circuits and when altering the two extreme
working duties of the transformers, a distinctive difference arises between
both the changes (for both reactors) of the magnetization characteristic
curvature. The evaluation is done with a specially elaborated numerical
method. When considering the results the two transformers with nearly the
same proportions of the current shape at one working duty, appear to have
entirely different proportions at the other working duty.
