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A mot in resonance would draw MORE power than an off-the-shelf (or out of the waste bin, haha) MOT. Grab a second MOT and short the HV side and wire the primary in series with the mot you actually want to use for something... this will limit the current draw to the max the second mot can draw normally.
Alternatively I have found that the balaced from a verry big light similar to what is used in street lights works fairly well Or you could make a veritable inductor by removing the secondary of another MOT and winding a smaller coil of about 50-100 turns which you can apply a dc current to to saturate the core and increase current (i haven'.t Tried this but it should work quiet well)
Registered Member #3926
Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
While I did have some success with the halogen transformer setup, there isn't a way to increase current output, I've already asked the same questions, check out my threads, I've used a 250watt supply, but I used only 3 turns which lead to the death of the transformer, this isn't a way to drive a flyback, if I were you, use atleast 10 turns, flyback output will be lower, but then the transformer won't be destroyed, also these things get very hot, fast, meaning that it's not an efficient way to drive a flyback. Try building a ZVS, or half-bridge, the latter being harder, I'd go for the ZVS for it's simplicity.
Here are my thread, maybe you can learn something from them (maybe...)
Use 15 turns on the primary pull a few arcs with it, check the heat of the primary wires and also the transformer itself, and then lower if it's not hot, stick with more turns than less.
Registered Member #5208
Joined: Thu Jun 07 2012, 06:12PM
Location:
Posts: 86
Platinum, I already built a ZVS. I used 3 turns occasionally, and only thing that got hot was the primary, up to the point when insulation on it started to melt, lol. I rarely use it now though. Thanks for the link, I saw your thread some time ago ;). Can you look at the "pic" I posted above, and tell me if it's correct? I'm not sure I got it right.
Registered Member #3926
Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
I'm not sure what that schematicis meant to be, But 3 turns is way too low use more. If you want more power in the ZVS, use a better more powerful supply, I use 45v near 15amps, but the voltage drops to 35~ Still alot of power. Don't forget to use a good long chicken stick.
Some people use secondary balaceding like shown in your pick but I would recommend balaceding the primary all you have to do is disconnect one of the power leaded from the MOT and put the primary of the second mot with its secondary shorted in series so to simplify things what you are doing is running two mots in series and shorting one and using the output of the other
Registered Member #5208
Joined: Thu Jun 07 2012, 06:12PM
Location:
Posts: 86
Thanks destroyer, your idea seems easier. Anyway, strange thing, I connected 2 MOCs (1uF and 0.95uF) to a MOT, and it was supposed to give big arcs (and trip my breaker). But to my suprise, the output was really low, maybe 2kV, but really small current. What the hell? Is that some sort of ballast?
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SMPS Flyback question
