PREHEATING POWER SUPPLY TO CONTROL WELD CURRENT IN A PREHEATING SYSTEM

• Main Authors: SCHARTNER, Quinn William, UECKER, James Lee
• Format: Patent
• Language: English; French; German
• Published: 09.10.2024
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

A preheating power supply (208) comprising power conversion circuitry and a bypass path prevention circuit (302). The power conversion circuitry includes first and second output power connectors (220, 230) of the preheating power supply (208) wherein the first output power connector (230) is connected to a second output power connector (220) of a different power supply, wherein both the first and second output power connectors (220, 230) are connected to a first contact tip (210), and wherein the power conversion circuitry is configured to output welding-type power to the first contact tip (2109 via the first output power connector and a second output power connector. The bypass path prevention circuit (302) is configured to prevent less than a threshold voltage applied to the first output power connector and the second output power connector from a different power supply from causing current to flow between the first output power connector and the second output power connector. The preheating power supply (208) establishes a preheat current path configured to return to the preheating power supply via the second output power connector of the different power supply.