Arc Welding Generators Used as Air Core Magnet Power Supplies Available to Purchase

An experimental study has shown that dc arc welding generators can be used satisfactorily as an inexpensive power source for large magnet systems. A 120 Hz load current ripple of only 0.05% rms was measured at one‐half load and decreased for heavier loads. Random low frequency current fluctuations of $⪞3%$ peak‐to‐peak were detected but were reduced to $⪝0.5%$ peak‐to‐peak with a feedback technique.