| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device for arc-welding which can effectively suppress arc interruption during welding.SOLUTION: A power supply device 100 for arc-welding comprises: a control portion 16 that controls current values for welding on the basis of a current command value; a current detecting portion 17 that detects the current values and outputs current value information including information about current values; and a correcting portion 20 that is connected to the current detecting portion 17, determines on the basis of the current value information whether or not the current command value should be corrected, and when determining that the current command value should be corrected, outputs correction information for correcting the current command value to correct the current command value. The correcting portion 20 includes a first determining portion 22 that determines that the current command value should be corrected when a decrease amount per unit hour of current values to be calculated based on the current value information, or a current decrease rate, is equal to a preset threshold or more.SELECTED DRAWING: Figure 1 |
