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US 9,751,150 B2Granted
Power source for electric arc welding
AssigneeLincoln Global, Inc.
InventorsJoseph A. Daniel, Todd E. Kooken, Lifeng Luo
Life of this patent
Estimating the term…
Abstract
A power source for an electric arc welding process, wherein the power source comprises 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 an output in the form of a second DC output signal electrically isolated from the first DC output signal and with a magnitude of a given ratio to the first DC output signal; and, a third stage to convert the second DC output signal to a welding output for the welding process.
Claims7
A power source comprising:
- an input rectifier for receipt of an AC input signal to output a rectified DC signal;
- a power factor correcting converter connected to said input rectifier to convert said rectified DC signal to a first fixed DC voltage signal having a first magnitude to define a first DC bus;
- DC to DC inverter connected to said first DC bus to convert said first fixed DC signal to a second fixed DC voltage signal having a second magnitude to define a second DC bus, where said second magnitude is lower than said first magnitude;
- and
- a regulated output converter coupled to said second DC bus to convert said second fixed DC signal to an output signal for a welding process, said output converter being regulated by a feedback signal from said welding process.
2 more elements
Dependencies are inferred from the claim text.