WELDING MACHINE AND METHOD CAPABLE OF SUPPLYING CURRENT WITH APPROPRIATE AMPLITUDE AND VARIATION TO A WIRE AND A TARGET WITHOUT A CHANGE IN REACTANCE

摘要

PURPOSE: Welding machine and method are provided to supply current with appropriate amplitude and variation to a wire and a target without a change in reactance of a reactor in the welding machine.;CONSTITUTION: A welding machine comprises a current setting unit(110), a current detecting unit(120) and a voltage control unit(130). The current setting unit sets variation in current between a wire and a target. The current detecting unit detects variation in current between the wire and the target. The voltage control unit compares variation in current detected from the current detecting unit with that set by the current setting unit and controls voltage between the wire and the target so that the former is the same to the latter.;COPYRIGHT KIPO 2012