Inverter controlled-type power source for arc welding

摘要

An arc welding power source supplies a high voltage for the reignition of an arc after the polarity reversal of a welding current to prevent the destruction of circuit elements and ensure the stable and positive polarity reversal despite its reduced size, and also the occurrence of a spike voltage in a main circuit during the polarity reversal of a large current or alternatively the welding current during the polarity reversal is controlled to suppress a spike voltage during the current reversal.