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My Induction Boards / Power Supplies / Progress on my home built supply |
| Progress on my home built supply |
| Posted By: T3sl4 On 06/01/2008 4:23 pm |
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Got it off the shelf again and messing around. Large picture of some cap banks I made up... gonna make a "induction lite" model, these are 5 x 20 x 0.1uF 275VAC MKPs, which together take up about a quarter of the space my full 200 x 0.1uF cap bank, so are probably rated less accordingly. http://webpages.charter.net/dawill/Images/Induction805.jpg I mainly like the sharpness and style of this shot. ;) Bridge I whacked together the other night, from copper strip and lots of caps. Total 2uF MKPs and 4.7uF (10 x 0.47uF) polyester bypassing the supply rails. Two 0.15uF 1000V snubber caps on the output, but one is disconnected (note tape under its lead insulating it from +V!) as it caused transistor shorts. http://webpages.charter.net/dawill/Images/Induction806.jpg Some action... http://www.youtube.com/watch?v=nY66rBJvbpY If the coil were cooler (it was already wasting 300W for a moment before I started shooting, and I have no water cooling set up at the moment), the bit of 1/2" EMT conduit would've been yellow hot and sparking zinc fumes from the galvanizing. My proof is that I've done exactly that already, which is why its surface looks rough. So there. This is only 400W tops, which seems to be about as much as I can get into this tank with this matching inductor. The bigger coil I've drawn as much as 800W with so far. That's not far from 320V (meter says 260~280V under these conditions), so I'll need a still smaller matching inductor to reach my ultimate power output goal I think. Peak inverter current is already up to 50A, that tank capacitor doesn't seem to be cancelling reactive current as much as I'd like it to... Tim |
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