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Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
hey guys, had some time on my hands, so i tried to make a simulation of a sstc/drsstc with the falstad circuit simulator. hope it helps some people like me who couldn't use spice if their life depended on it. usualy when i do stuff like this the sim lags and breaks because of the massive values(current) generated. i finaly had the time to sit down and make it work.
it doesn't have feedback, just a set frequency, and all the logic is not a driver, but just stuff to control the on, off of the coil. turns out inverters have no low impedance state, so that was a pain. the inverter would invert the "no signal" to positive, keeping one of the fets on at any given time rather than shutting both off. the gates fix that.
i would assume that anyone who wanted to put more work into it could get a full feedback/transformer setup going, and if someone does, pleas let me know i would like to see it =)
well, here it is:link here and for the file to import(if the link fails for someone):
$ 1 5.0E-6 5.934295036739208 51 5.0 50 f 576 128 608 128 0 1.5 f 576 224 608 224 0 1.5 w 608 144 608 176 0 w 608 208 608 176 0 w 608 240 608 256 0 g 608 272 608 304 0 R 608 112 608 48 0 0 40.0 200.0 0.0 0.0 0.5 l 608 176 688 176 0 0.1 0.0779105339944841 c 688 176 736 176 0 2.5E-7 -4.192876621730644 g 736 176 736 288 0 w 608 272 608 256 0 r 512 224 576 224 0 10.0 r 512 128 576 128 0 10.0 R 176 192 128 192 0 2 1000.0 2.5 2.5 0.0 0.5 154 272 128 352 128 0 2 5.0 w 272 112 176 112 0 w 176 112 176 192 0 w 176 192 176 224 0 w 176 224 288 224 0 I 240 144 272 144 0 0.5 L 240 144 208 144 0 0 false 5.0 0.0 I 288 224 336 224 0 0.5 w 336 224 352 224 0 150 384 128 464 128 0 2 5.0 150 384 224 464 224 0 2 5.0 w 352 128 352 112 0 w 352 112 384 112 0 w 352 224 352 208 0 w 352 208 384 208 0 w 464 128 512 128 0 w 384 144 368 144 0 w 368 144 368 240 0 w 384 240 368 240 0 w 368 144 352 144 0 w 352 144 352 176 0 w 272 144 272 176 0 w 272 176 352 176 0 I 464 224 512 224 0 0.5 o 8 64 0 35 80.0 0.1 0 -1
Registered Member #4118
Joined: Mon Oct 03 2011, 04:50PM
Location: MD
Posts: 140
For falstad, I don't recommend using the built-in mosfets. They seem to have weird resistance/Vdrop characteristics... I use analog switches (under active components) instead. Also, you can use higher frequencies by going into options->other options and turning down the timestep.
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
well that solves the low voltage problem, thanks. the fres is set to 1khz simply because its easier to follow, but it could of course be changed to better suit a specific design. i alwars find the phisics of the semiconductors in falstad to be slightly... off sometimes. wish he would update the app with more components. anyways, thanks for the tip!
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dr(sstc) simulation
