Power source for electric arc welding
First Claim
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1. 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.
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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.
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Citations
7 Claims
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1. A power source comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification