| 摘要 |
<p>An improvement in a welder including a power source for performing a TIG welding process across an electrode and a workpiece where the power source has a first output lead connected to the electrode and a second output lead connected to the workpiece with a controller for creating a waveform across the power leads. The waveform has a profile alternating between a first current section and a second current section at a given overall frequency and the sections each have a peak current in either the positive or negative direction and a duration. The improvement comprises at least one of the current sections being pulsed between a high current level equal to its peak current and a low current level in the opposite direction of the peak current at a pulsing frequency greater than the given overall frequency.</p> |
