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#12
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heard about that but i'm sure i followed the rule of thumb for inductance when i made the inductor. what i'm not sure is how to test it or how i would know if they are out of phase as i dont have a scope. how can i add an air gap in the inductor? do i have to change the core?
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#14
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the wire feed assembly is modded with a separate transformer supply. when the inductor heats up the sizzle changes to a machine gun sound. after cooling down the sizzle is back again. i don't see any difference when removing the copper sheet so i'll leave it that way to protect the winding from scratches.
as for the parallel i connected the two outer taps is it ok? |
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#15
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Not sure that saturation is the reason for the problem that you are seeing. However, to avoid saturation by adding an air gap: if your windings are on the central leg of the E, and all the I parts are stacked together making a block, it should be quite easy to separate them. Remove from the frame the two screws that hold the I parts , lift off all the I laminations, file the holes in the frame to allow for a gap, add a few sheets of mylar across the end-face of the E, reassemble.
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#17
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Yes, the mylar/plastic/card insulator provides the air-gap ( to prevent saturation ), by holding the stack of I-laminations about 1 or 2 mm away from the E-core, rather than these two parts being pressed tightly together.
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#18
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ok now i get it thanks. Your right with the wire size it's too small to carry 100 amps. i can't find a thicker wire so i had 3 10g's in parallel for the internal wiring instead. now it's penetrating way better than it used to. also i find the positive rail more effective for the inductor. the sizzle and arc is more intense on positive while negative rail has a soft sizzle but a steadier arc.
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#20
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lol i don't intend to sell. mine's to educate only..except for the inductor it cost me only about $10 to convert this AC to DC. it's not super-modded it's plain common sense mod. it's a straight full wave rectifier circuit + inductor nothing more. selling it twice the price is just sick greedy don't you think? very same reason why we have forums like this...
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