Power supply apparatus for ARC-utilizing apparatuses

摘要: One of commercial AC voltages is coupled to power supply terminals from one supplies. The supplies belong either a first group providing higher or second lower voltages. A rectifier rectifies the voltage applied terminals, and rectified developed between two output terminals. switching unit operates connect voltage-boosting converters selectively in series parallel Inverters are connected sides association with respective for converting DC associated high-frequency voltage-transformed by voltage-transformers, converted into circuit reactor. apparatus. control controls so as when while connecting