| 摘要 |
A welding power source (100) that provides a welding current to an electrode (110) and a workpiece (111) includes a source of welding current (102) having an inductor (103). The inductor (103) and current source (102) are connected to a pair of outputs, such as the output studs (109), and form a welding current path including the source of current (102), the output inductor (103), the outputs (109), the electrode (110) and workpiece (111). A source of a high frequency voltage, such as a high frequency coupling coil (106) is included in the welding current path. An arc starting circuit (105) provides a controllable current path (107,108) for current flow in the inductor (103) prior to the application of high frequency voltage. In this way the inductor (103) can be saturated before the welding arc is struck and this enables the arc to be struck more easily and reliably. <IMAGE> |
