| 摘要 |
<p>An arc welding machine is disclosed for providing a continuous feed electrode to a weld site. The arc welding machine includes a line frequency transformer (52) having a primary winding (64), a first secondary winding (66), and a second secondary winding (68) (e.g., an extension winding, a separate winding, etc.). The first secondary winding (66) provides a welding power having a first voltage at a welding power output terminal (76). The second secondary winding (68) provides a second welding power having a second higher voltage at an input terminal of a switch (80), the switch (80) being controlled to provide a pulsed power at the welding power output terminal (76). According to one feature, the arc welding machine produces a pulsed power having a fixed pulse width and a fixed frequency, the fixed pulse width and fixed frequency being substantially free of operator adjustment. <IMAGE></p> |
