Current inverter CSI Series

direct currentACsingle-phase

While the welding made by means of single-phase fed AC transformers where the welding power is adjusted through SCR and choked by obtaining continuous passages from "zero" and cold intervals making the welding "core" not homogeneous and with oxidised parts, welding through inverter technology allows rectifying the current and filtering it by AC IGBT with higher frequency compared with the electric system (generally of 1000 Hz). This last will feed a transformer, made just for this purpose, for high frequencies, on which there will be, as secondary item, a diode bridge enabling the delivery of a direct welding current. The first evinced advantage is that, welding with direct current, there aren't any "cold" interruption and passages from "zero" enabling to obtain a homogeneous welding "core” free from oxidised parts; therefore, it's possible to weld light alloys. In addition, the high frequency allows adjustments and, above all, quick and accurate feedbacks (millisecond by millisecond). Such a quick feedback enables to weld at lower pressures obtaining fewer deformations of the part, a longer life of electrodes and the smallest welding heads. Moreover, a lower power consumption and the three-phase feeding that prevents from the shift of the feeding current obtaining a cosφ of almost 1. All our welding heads, including the PAT 1 (micro), can be delivered with an inverter system, thanks to the wide range of available transformers and generators. Power inverter using IGBT technology for medium–frequency output, programmable via terminal or via remote field bus.