Transformer module for a welder
AssigneeLincoln Global, Inc.
InventorsTodd Kooken, Robert Dodge
Life of this patent
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Abstract
An electric arc welder comprising a high switching frequency inverter for driving the primary of an output transformer where the output transformer has a plurality of modules forming the secondary windings of the transformer and each of the modules comprises a first coaxial set of concentric, telescoped tubes separated by a tubular insulator, a second coaxial set of concentric, telescoped conductive tubes separated by a tubular insulator wherein the sets each have an elongated central passage for accommodating the primary and a conductor connecting the tubes into a series circuit. These modules form a transformer for such welder.
Claims26
(canceled)
The high speed frequency transformer of claim 36 wherein each of said magnetic cores comprises a plurality of doughnut-shaped rings around one of said tubes.
3-4. (canceled)
The high frequency transformer of claim 36 wherein each of said first and second modules further includes a conductive assembly comprising a third conductive tube with first and second ends, a fourth conductive tube with first and second ends and a second jumper strap joining said first ends of said third and fourth tubes into a parallel relationship to each other and to said first and second tubes;
- said third and fourth parallel tubes being telescoped into said passages of said first and second tubes, respectively, and having elongated passages for accommodating said primary winding or windings with said first and second jumper strap spaced from each other;
- a first tubular insulator between said first and third tubes;
- a second tubular insulator between said second and fourth tubes;
- and a center tap connector joining said conductive assembly to a second end of one of said first and second tubes to form said tubes into a series circuit.
7-21. (canceled)
An electric arc welder comprising an output transformer and a high switching frequency inverter for driving the primary of the output transformer, said output transformer having a plurality of modules forming secondary windings, each of said modules comprising a first coaxial set of concentric, telescoped tubes separated by a tubular insulator, a second coaxial set of concentric, telescoped conductive tubes separated by a tubular insulator, said sets each accommodating said primary, and a conductor connecting said tubes into a series circuit.
(canceled)
A power source as defined in claim 44 wherein said tubes of said modules are each connected to a rectifier to create a positive and negative current output and a circuit connecting said outputs in parallel.
27-34. (canceled)
A high frequency transformer of an electric arc welder, comprising:
- a first module having a first module secondary winding section;
- a second module having a second module secondary winding section, said first module secondary winding section interconnected with said second module secondary winding section;
- and
- a primary winding through each of said first and second modules.
A power source for electric arc welding, said power source includes a high switching speed inverter for driving the primary of an output transformer with AC primary current, said output transformer having a number of modules each with a given current capacity forming the secondary winding of the output transformer, said modules connected in parallel with the total output welding current being the sum of the current capacities of said separate modules and able to exceed about 1,000 amperes.
Dependencies are inferred from the claim text.