Electric arc welding system

An electric arc welding system for creating an AC welding arc between an electrode and a workpiece, said system comprising a first power supply to create a first AC current with first weld parameters between said electrode and workpiece by generating a first switch controlling signal reversing polarity of said first current at a specific switch time, a second power supply to create a second AC current with second weld parameters between said electrode and workpiece by a second switch controlling signal reversing polarity of said second current at a switch time near said specific s switch time, and a timing interface between said first and second power supplies to create said second signal by said first signal where said switch time of said second power supply is within about 5 μs of said specific switch time.

An electric arc welding system for creating a first AC welding arc between a first weld electrode and workpiece and a second AC welding arc between a second weld electrode and said workpiece as said first and second electrodes move along said workpiece, said system comprising a first cell with at least two power supplies connected to said first arc and operated at a first synchronized time determined by a first synchronized signal with first weld parameters and a high accuracy interconnection interface between said power supplies of said first cell to correlate polarity switching of said power supplies of said first cell, a second cell with at least two power supplies connected to said second arc and operated at a second synchronized time determined by a second synchronize signal offset from said first synchronize signal with second weld parameters and a high accuracy interconnection interface between said power supplies of said second cell to correlate polarity switching of said power supplies of said second cell and a low accuracy information network connected to said first and second cells and containing digital signals including said first and second weld parameters and digitized first and second synchronize signals.

An electric arc welding system for creating an AC welding arc between an electrode and a workpiece, said system comprising a first power supply to create a first AC current with first weld parameters between said electrode and workpiece by generating a first switch controlling signal reversing polarity of said first current at a specific active switch time, a second power supply to create a second AC current with second weld parameters between said electrode and workpiece by a second switch controlling signal reversing polarity of said second current at a switch activate time, and a timing interface between said first and second power supplies to create said second signal by said first signal where said switch activate time of said second power supply is within about 10 μs of said specific switch activate time of said first power supply.

An electric arc welding system for creating an AC welding arc between an electrode and a workpiece, said system comprising a first power supply to create a first AC current with first weld parameters between said electrode and workpiece by generating a first switch signal for reversing polarity of said first current at a specific time, a second power supply to create a second AC current with second weld parameters between said electrode and workpiece by a second switch signal for reversing polarity of said second current at a given time, a timing interface between said first and second power supplies to create said second signal by said first signal, and a circuit to switch said power supplies after said first and second signal, said circuit includes a detector to switch said power supplies when the current of said power supplies is less than a given amount.

An electric arc welding system for creating an AC welding arc between an electrode and a workpiece, said system comprising a first power supply to create a first AC current with first weld parameters between said electrode and workpiece by generating a first switch controlling signal reversing polarity of said first current at a specific active switch time, a second power supply to create a second AC current with second weld parameters between said electrode and workpiece by a second switch controlling signal reversing polarity of said second current at a switch activate time, and a timing interface between said first and second power supplies to create said second signal by said first signal where said first and second signals are within about 10 μs.