POWER SUPPLY APPARATUS FOR AN ARC PLASMA TORCH

摘要

PURPOSE: A power supply apparatus for an arc plasma torch is provided to generate an arch plasma stably by forming a high initial voltage through unlimited resistance. CONSTITUTION: A DC power supply device(6) supplies power to a cathode(2) and an anode nozzle(4). An arc plasma torch generates a plasma flame(8). A high frequency AC power supply device(10) is connected in parallel to the DC power supply device. Resistance is maintained less than 1Ω in order to stabilize the fluctuation voltage in the forming arc plasma. The plasma flame is generated by supplying the power source of the DC power supply device to the cathode and the anode nozzle. A dummy load is installed in the power output part of the DC power supply device.