| 摘要 |
A method and apparatus for providing CV welding power includes first and second power sources, connected in parallel. The first CV source provides an output sufficient for welding. The second CV source also has an output sufficient for welding, but at is at a voltage less than the voltage of the output of the first CV source. The background CV source may also have a lower current output. Voltage from the first CV source is blocked from being applied to the second CV source, preferably by diodes or SCRs. The second CV source is a background source with a secondary and a rectifier, preferably a center tapped secondary with a full wave rectifier, and an inductor between the output. The first CV source is a welding source with a secondary and a rectifier, preferably a center tapped secondary with a full wave rectifier, and an inductor between the rectifier and the output. The secondaries may be wound about the same or different cores, and the inductors may be wound about the same or different cores.
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