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[TCML] HV-VF generator for TIG welding
Hello,
My question has to do with coil winding, but is out of the normal
realm of this group.
I am building a HF/HV generator to initiate a spark for TIG welding/
plasma welding. In TIG welding, there is a tungsten electrode and
the work-piece with current flowing in DC or AC, and different
polarity depending on the work being done. To initiate the arc, the
most used method is to couple HF/HV onto the working current, the arc
providing the initial ionization path for the working current to
follow. The arc can be set-up to be continuous or until current flow
is detected. The HV part comes from a 12kV sign transformer, a
series spark gap, and a couple of door knobs and resistors. Anyone
have any pearls of wisdom for me? I had a thought about coupling the
HF into the power cable. Usually, they are coupled by winding one on
the other together with a ferrite core. What would happen to place
the HV cable inside a copper tube with cross section rated for the
welding current, essentially so they are coaxial, and then bend the
tubing (with the HV cable inside the tube) into the coil form? I
know, probably unnecessary overkill. Would this work?
Thank you.
JP
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