Plasma Jet Ignition

Tony Bryant Tony.Bryant at psc.fp.co.nz
Tue Feb 23 03:39:21 GMT 1999


> bob at bobthecomputerguy.com (Robert Harris) wrote:
> 
> >Re-reading my Heywood and have become re-in-love with the concept of 
> >plasma jet ignition.   Essentially, a normal CD ignition fires the 
> >plug in a cavity connected to the main chamber by an orifice.  Once 
> >the arc is established, a second low voltage high current capacitive 
> >discharge is routed into the arc.  
> 
> Hey - I like the sound of THAT.  Did someone get this working?
> 
> This reminds me of the arc stabilizers you find on TIG welders - a high 
> frequencyt current starts the pilot plasma/arc which then allows the 
> main welding current to flow on through...
> 

I've also been toying with this idea for a while, but I can't see how 
you can connect a HV, LC and a LV, HC source together. The 
seemingly inevitble problem is the LVHC source must be low 
impedence, and therefore absorbs the HV in preference the spark 
gap? How are these TIG welders arranged?




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