RE: Xenon Short Arc Igniter Help? (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Thu, 10 Feb 2005 09:34:11 +1100
From: Tom Luttrell PWRCOM <tom@xxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: RE: Xenon Short Arc Igniter Help? (fwd)

If you use a high frequency pulse (from an ignition coil for example)
you can place some high current inductors in the DC leads to prevent the
pulse travelling into the DC power supply. Obtaining the wire to wind
these monsters could be tricky, maybe they could be wound from surplus
lead from the welder.

Placing a capacitor between the DC side of the inductors will enhance
the low pass characteristic and allow smaller sized inductors, but you
will be attenuating the HV a little more.


> -----Original Message-----
> From: High Voltage list [mailto:hvlist@xxxxxxxxxx] 
> Sent: Thursday, 10 February 2005 7:53 AM
> To: hvlist
> Subject: Xenon Short Arc Igniter Help? (fwd)
> 
> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> 
> 
> 
> ---------- Forwarded message ----------
> Date: Tue, 8 Feb 2005 21:21:39 -0500
> From: Charles Brush <cfbrush@xxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Xenon Short Arc Igniter Help?
> 
> Hi everyone,
> 
> I have a 750w xenon short arc aviation lamp that I bought on 
> ebay a few months ago, and I am trying to piece together a 
> power supply for it.  The lamp requires about 41 amps at 18 
> volts DC, so I thought a small DC arc welder might make a 
> good supply for it.  There are some pretty cheap inverter 
> models that are very light, and have continuously variable 
> current.  The problem is what do I use as an igniter circuit 
> to initiate the arc?  I gather about 30kV is required, and 
> building some simple flyback kinda thing wouldn't be hard.  
> What I don't quite get however is how I'd keep the HV out of 
> the rest of the power supply.  it just has to initiate the 
> arc and then isolate itself.  Any comments or suggestions 
> would be quite welcome, and if anyone here has used short arc 
> lamps I'd love to hear your experiences.  I am well aware of 
> the hazards of these kinds of lamps and will take full 
> precautions (I have also been collecting antique carbon arc 
> lamps for years...as well as building big Tesla coils and 
> other fun things).  Thanks for reading this post!
> 
> Zap!
> 
> Charles Brush
> 
> 
> 
> 
>