Browse Prior Art Database

Engine Driven Welder With Plasma Cutting Ability

IP.com Disclosure Number: IPCOM000248737D
Publication Date: 2017-Jan-03
Document File: 3 page(s) / 211K

Publishing Venue

The IP.com Prior Art Database

Related People

Edward Enyedy: INVENTOR [+2]

Abstract

Our invention is to efficiently combine constant current welding, constant voltage welding, plasma cutting, 50/60 Hz power and an air compressor into one generator machine.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Invention: Engine Driven Welder With Plasma Cutting Ability

Inventors: Ed Enyedy, Andy Meckler
The Lincoln Electric Company

Summary of Invention:

Generators that create 50/60 Hz auxiliary power and energy for welding are well known.   There are also generators and engine driven welders that include a built-in air compressor for gouging or for use with air tools.

Sometimes, customers may want to perform plasma cutting.  With existing equipment, they plug the plasma cutter into the 50/60Hz power of the generator.  Plasma cutters require a source of compressed air.  Some plasma cutters include a built-in air compressor.  For others, the air source is the compressor from the generator or perhaps a compressor plugged into the 50/60 Hz auxiliary power output.

Plasma cutting differs widely from welding, in that it is a high voltage, lower current process where as welding is a low voltage, high current process.  Hence, it can be difficult economically to combine both processes in one machine.   There are a few Stick/CC/Plasma cutting machines on the market but not many.

Our invention is to efficiently combine constant current welding, constant voltage welding, plasma cutting, 50/60 Hz power and an air compressor into one generator machine.

In one form, only plasma cutting or welding can be done at a given time, to prevent unintended voltages on the studs or torches and to use less electronics for a lower cost solution.  In the attached schematic figure labeled “Concept 1”, it can be seen that either plasma cutting or welding can be performed, but not simultaneously (due to the switch).  The engine (internal combustion engine) drives a generator, which provides an auxiliary power output and supplies electrical energy for plasma cutting/welding to a rectifier and chopper combination.  The switch directs the output from the chopper to either the plasma cutting output or the welding output.  The engine also drives an air compressor, e.g., via an accessory belt.   Thus, compressed air for the plasma cutter and for use with various air tools is available to the user.

In another form, plasma cutting and welding can be performed simultaneously.  When one process is...