Lincoln Global, Inc.

Matthew Jon Krueger

Lifeng Luo

Todd E Kooken

A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal and converts the first DC output signal to a second DC output signal of the second stage; and a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module within a first housing structure and the third stage is assembled into a second module having a separate housing structure connectable to the first module with long power cables. The second module also includes wire feeding systems and electronics.

Welding system and method of welding

A welding or cutting system is provided using a performance module which monitors the real-time performance of a welding or cutting system and displays this information on a user interface on the system. Other embodiments of the system also include a cost calculation function in which a cost of the welding or cutting operation is calculated.

System and method for real-time computation and reporting of welding machine performance and metrics

A welding or cutting system is provided using an interleaved buck-boost stage which dynamically controls power factor correction and operation of the interleaved buck-boost modules to optimize efficiency and operation of the welding system.

Dynamic power factor correction and dynamic control for converter in power supply

In a power source of a welding system, an inverter rectifier output circuit and method for reducing the blocking voltages across saturable reactors associated with a rectifier coupled to a transformer winding in the inverter rectifier output circuit during both turn-on and turn-off transitions of the rectifier. At least a portion of a reverse recovery current associated with the rectifier is blocked by allowing blocking voltages to build across associated saturable reactors during a transition phase of the rectifier. During a turn-off portion of the transition phase, the blocking voltages are reduced using a RC circuit, thereby suppressing a peak voltage associated with the rectifier. During a turn-on portion of the transition phase, the blocking voltages are reduced using another saturable reactor in series with a free-wheeling diode.

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Medina, OH, United States of America

Matthew Jon Krueger