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Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Pinky's Brain wrote ...
<<1 us rise times is not exactly what flyback ignition coils are designed for.
Yes this worries me as well, when he said 1 to 10uS, I thought to myself, well the 10uS isnt too difficult, but 1uS would be. And if he means continuously variable between the two, even more difficult.
Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
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Posts: 837
Patrick wrote ...
Yes this worries me as well, when he said 1 to 10uS, I thought to myself, well the 10uS isnt too difficult, but 1uS would be. And if he means continuously variable between the two, even more difficult.
It's just a question of money really. As I said you can do this with IGBTs and pulse transformers (maybe air core). You can even drive the IGBT in the linear region to get any pulse shape you want. Or if you want to avoid the head ache of power transformers you can do it with a stack of IGBTs too.
At these voltages and bandwidth both of these are feasible at low BOM cost ... as long as you aren't talking about >>kA currents (at which point triggered spark gaps become the only cheap option, and you need PFNs for a flat top pulse). That just goes back to the inadequate specifications by the OP.
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