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...Manual book arc inverter dc mma welding machine principle technical data series block diagram of input phase v hz output hf rectifier transformer filter control circuit figure this machines apply igbt soft switch technology volt are rectified by inverted into ac reduced and filtered then power suitable for after process the welder s dynamical responsive speed has been greatly increased so size weight noticeably result in energy saving source enjoy sound anti fluctuating ability high quality performance during external context changes as to fluctuation supply extended cables easy start stable length pretty weld formation capability continuous regulation current force characteristic curve is follows uv u i a imin imax ampere main parameters description rated voltage capacity kw duty cycle range open load full efficiency factorfull electrode diameter mm kg dimension insulation grade h b table parameter specification...