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US 2006/0213891 A1Published application
Arc welding system
AssigneeLincoln Global, Inc.
InventorElliott Stava
Life of this patent
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AssigneeLincoln Global, Inc.
InventorElliott Stava
Estimating the term…
An electric arc welding system including a power lead for providing welding current between an advancing welding wire and a workpiece, a short circuit sensor having a short circuit output signal when the electrode is shorted with the workpiece and a premonition sensor having a fuse output signal when a short circuit is about to break. This welding system has at least two power source modules, each with a common isolated DC input and an output connected to the power lead with each of the modules controlled to perform a short circuit arc welding process. The individual module comprises a regulated DC to DC converter having a DC output signal with a waveform controlled by a waveform signal from a controller and an output switch receiving the DC output signal and in series with the power lead where the output switch is opened by a gate signal to reduce the welding current in the power lead.
An electric arc welding system including a power lead for providing welding current between an advancing welding wire and a workpiece, a short circuit sensor having a short circuit output signal when said electrode is shorted with said workpiece, a premonition sensor having a fuse output signal when a short circuit is about to break, said welding system having at least two power source modules each with a common isolated DC input and an output connected to said power lead, each of said modules controlled to perform a short circuit arc welding process having an arc condition and a short circuit condition in each of a plurality of welding cycles, where power supplied to a welding electrode is controlled according to a detected short-circuit and an anticipated metal breaking fuse condition, each of said modules comprising a regulated DC to DC converter having a DC output signal with a waveform controlled by a waveform signal from a controller and an output switch receiving said DC output signal and in series with said power lead, said output switch being opened by a gate signal to reduce said welding current in said power lead, said controller having a first input comprising said short circuit output signal and a second input comprising said fuse output signal and a switch control output for creating said gate signal to reduce said welding current upon initial receipt of a signal on either of said first or second inputs to said controller.
An electric arc welding system as defined in claim 41 wherein said rate of rise is varied.
A power source module comprising a DC input for said module connected to a regulated DC to DC converter having a DC output signal with a waveform controlled by a waveform signal on a first controller input and an output switch receiving said DC output signal and a DC output for said module, said output switch being opened by a gate signal on a second controller input to reduce the current on said DC output of said module.
A method for electric arc welding comprising:
A method for electric arc welding comprising:
An electric arc welding system including a powder lead for providing welding current between an advancing welding wire and a workpiece, said welding system having at least two power source modules each with a common isolated DC input and an output connected to said power lead, each of said modules comprising a regulated DC to DC converter having a DC output signal with a waveform controlled by a waveform signal from a controller and in series with said power lead wherein said waveform signal is created by a waveform generator loaded with a given waveform.
An electric arc welding system including a power lead for providing welding current between an advancing welding wire and a workpiece, said welding system having at least two power source modules each with a common DC input and an output connected to said power lead, each of said modules comprising a regulated DC to DC converter having a DC output signal with a waveform controlled by a waveform signal from a controller and in series with said power lead wherein said waveform signal is created by a waveform generator loaded with a given waveform and a circuit to change the polarity of said welding current at selected times.
Dependencies are inferred from the claim text.