| 摘要 |
The resent application describe a method and a system with a welding torch having a contact tip which has an upper portion (110) and a lower portion (120), where the upper portion (110) and the lower portion (120) are electrically isolated from each other. Each of the upper portion (110) and the lower portion (120) make contact with the same electrode (E) during a welding operation. A first power supply (80) is coupled to the upper portion (110) which provides a first current to the upper portion during the welding operation, and a second power supply (60) is coupled to the second portion (120) which provides a second current during the welding operation. The first and second currents are accumulated in the electrode (E) during welding to provide a welding waveform. The first power supply (60) can have a higher inductance than the second power supply (80). |
