From: ripe@bellsouth.net   
      
   "Admin"  wrote in message   
   news:200901131209538930-sowhati@comcastnet...   
   > On 2009-01-12 17:06:24 -0800, "Herman"  said:   
   >   
   >> "Admin"  wrote in message   
   >> news:2009011111222775249-sowhati@comcastnet...   
   >>>   
   >>> Hi all,   
   >>>   
   >>> I have this circuit that I am hope to use for HV electrolysis. It has   
   >>> damaged every Mosfet and IGBT I have tried. It even damaged an IGBT   
   >>> that is rated 600V and 58 amps. The circuit works without a hitch when   
   >>> the load is resistive like a light bulb.   
   >>>   
   >>> But as soon as I hook up a transformer the IGBT fails in 10 seconds. It   
   >>> has trouble with inductive loads.   
   >>>   
   >>> I have tried clamping the IGBT with a diode to no avail.   
   >>>   
   >>> Please, somebody take a look and tell me what I am doing wrong. My   
   >>> power source is and auto inverter.   
   >>>   
   >>>   
   >>   
   >> The .22uF 400 volt cap should be 330uF 400 volts.   
   >   
   > Thanks. I will try that.   
   > --   
   > Make extra income!! Goto http://www.paysforever.com/JA6680.htm   
   >   
      
      
   Since you have an isolated supply for your pulse generator, use it's power   
   supply and eliminate the opto isolator.  Opto isolators have a rather long   
   rise and fall time.  Use a full wave bridge on your low voltage supply and   
   make the filter capacitor 220 uF.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)