| 摘要 |
PURPOSE:To eliminate the setting of a welding output interference mutually with the setting of a polarity switching frequency and output polarity ratio by executing the control of the welding output by an inverter and executing the controls of the polarity switching frequency and output polarity ratio by a welding output polarity switch. CONSTITUTION:The output signal of the comparator 20 of a welding output current feedback is outputted to the driving circuit 21 of an inverter 2 to add a function so as to perform the control of an averaged welding output current to the driving circuit 21 of the inverter 2. The control of a polarity switching frequency and output polarity ratio is performed by a welding output polarity switch 9. The respective adjustment range of the welding output can thus be set wider by reducing the mutual interference.
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