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Registered Member #102
Joined: Thu Feb 09 2006, 08:15PM
Location: Raleigh, NC
Posts: 169
Ai again, once powdered the ferrite acts as a fluid pretty well. i have yet to get the fittings to give this a shot. dern 60hz tranny project consumes my time
I would like to see what the rest of you can produce, that is, the ones with time ;)
Yes, indeed my entire motive was to make a large ferrite pole pig, basicly. I'm thinking: wound with 26-18 awg wire. Assuming this method would work, which I am going to give the "benefit of the doubt" and say it will. You can introduce SS into your SGTC :). every one has power, just not the pole pig.
Registered Member #75
Joined: Thu Feb 09 2006, 09:30AM
Location: Montana, USA
Posts: 711
Sounds all very well, but how would you actually go about processing the ferrite into a fine powder? From my experience, it is pretty hard stuff, so you could not just pop it in the coffee mill. And even with softer materials, like charcoal, you need a big ball mill and a hell of a lot of patience to produce some fine powder. So this is where I really see the problem here.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
For 60 Hz power transformer operation, consider the total saturation flux (BxAe) GOOD ferrite will be ok to 0.35T peak over temperature range I think I've packed broken ferrite to about 1/3 the density of solid ferrite so for my powdered ferrite about 0.1T peak is about maximum. Since transformer steel is used at 1.5 to 1.8 T pk, 15 times the cross-sectional area of core is required for homemade ferrite core vs. transformer steel for similar Volts/Turn. The wire will be 4 times longer so needs to be 4 times the area to maintain similar resistance So you will need 16 times the weight of copper for homemade ferrite core compared to transformer steel core.
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Trial method of flyabck core fabrication
