Re: Xenon Short Arc Igniter Help? (fwd)

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

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Sat, 12 Feb 2005 10:01:06 -0700
From: robert heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Xenon Short Arc Igniter Help?

Xenon flash lamp trigger coils are made to fire photo flash lamps and strobe
lamps many photo labs can supply old camera flash assemblies or you can
order just the trigger coil for under $5 and power then off line voltage.
They produce a 3000 v trigger voltage,
   Robert  H
-- 


> From: "High Voltage list" <hvlist@xxxxxxxxxx>
> Date: Thu, 10 Feb 2005 22:05:30 -0700 (MST)
> To: hvlist <hvlist@xxxxxxxxxxxxxxxxx>
> Subject: Re: Xenon Short Arc Igniter Help? (fwd)
> Resent-From: hvlist@xxxxxxxxxx
> Resent-Date: Thu, 10 Feb 2005 22:05:32 -0700 (MST)
> 
> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> 
> 
> 
> ---------- Forwarded message ----------
> Date: Wed, 09 Feb 2005 14:18:13 -0800
> From: Jim Lux <jimlux@xxxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Xenon Short Arc Igniter Help? (fwd)
> 
> At 12:53 PM 2/9/2005, you wrote:
>> 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!
> 
> I think these things work by using a saturable core inductor in
> series.  You couple the HV pulse in series with the lamp, (the inductance
> of the saturable core keeping the HV from being shorted by the low output
> impedance of the LV power supply), then when the lamp strikes, the current
> shoots up, the core saturates, and goes to low impedance.
> 
> 
> 
> 
>