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Registered Member #154
Joined: Sun Feb 12 2006, 04:28PM
Location: Westmidlands, UK
Posts: 260
Hi Chris,
WOW.....thats one cool DRSSTC driver!! and powerfull too! I take it that its a primary feedback/steve Ward type circuit? What sort of primary peak current will you be setting your overcurrent to trip at? and what dimension coil are you going to drive?
I think i've said this loads before.....so i'll say it again...lol your workmanship and effort you put into your projects is VERY imperssive!.....not only do they perfom great, they all look like a work of art too! just send the $10 in the post!......
Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
Why the caps should be hot??? In case yours are hot something is wrong with them...
Same reason those induction heaters use water-cooled capacitors, there is absurd amounts of reactive power going through these caps. The RMS currents are particularly high for DRSSTCs, and you cant get past I*I*R power loss.
Chris, im worried that you only have 3 caps in series. Whats the total cap value? And you mention 1800A peak at some frequency, so uhh you do the math, but it sure sounds like you will be blasting those caps with far too much voltage. Ive found out a number of times what that does in a DRSSTC, you get pretty blue light from your capacitor, and then smoke, sort of like a disco but even worse.
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