| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device of an arc applying equipment adaptable to a two-voltage power-receiving system and having the consistent quality in which the output capacity meets the requests of many kinds of models, and the kinds of manufacture components are limited at low cost. SOLUTION: In the power supply device which receives a two-voltage power-receiving system via a two-voltage connection switching means provided on a first stage of an AC unit, and a plurality of unit power supply blocks comprising an input stage DC unit, an AC unit including an inverter, and a DC output unit are connected in parallel at the output end thereof, the output of each inverter is controlled by detecting the output current of each AC unit or detecting the output current of each DC output unit in order to keep the power balance between the unit power supply blocks and to keep each output of the same current value. COPYRIGHT: (C)2006,JPO&NCIPI
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