POWER SOURCE SYSTEM FOR ARC PROCESSING

摘要

PROBLEM TO BE SOLVED: To provide a power source system for arc processing by lowering low output current at a light work load in a conventional inverter system using resonant reactors. SOLUTION: A reactor switchover resonant tank LCD is connected between an inverter circuit INV and a main transformer INT. For a lower output current range where the output current is set at a low value, connecting two resonance reactors LR controls the output current. For a higher output current range where the output current is set at a high value, connecting only one resonance reactor controls the output current.