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Joined: 12 May 2009
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Posted: 27 January 2010 at 11:43am | IP Logged Quote MacGyver

Besides dumpster diving for used transformers, does anyone have a source for soft, grain-oriented iron laminate to be used in making a windmill generator?

. . . . . Mac

Nothing difficult is ever easy!
Perhaps better stated in the words of Morgan Freeman,
"Where there is no struggle, there is no progress!"
Copeville, Texas

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Joined: 09 September 2009
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Posted: 27 January 2010 at 12:38pm | IP Logged Quote Downwind

Depending on the size required you might get away with the coil laminates out of a old lawn mower or stationary motor as they are exactly what i think you are doing.
Also they are made in an arc as you need.
If you fashon the magnet dia the same as the original flywheel all should be correct in clearance.

Some are internal to the flywheel and some are external to the flywheel.
You would want the external ones.
I think Briggs and Stratton are external??????


Sometimes it just works
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Joined: 07 November 2007
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Posted: 27 January 2010 at 11:16pm | IP Logged Quote Tinker

Maybe not grain oriented but I have made iron 'rings' to attach the magnets from the tie strips used in framed buildings. These come stamped with nail holes or plain, are about 30mm wide, 1mm thick and quite long. They are zinc plated, if electrical insulation is required just paint or stick together with epoxy resin, etc.

Nice thing is you can make any diameter you like, and as many layers. If the ring has to fit precisely inside a housing its best to make nesting single layer rings, rather than one continuous spiral. Build it from the outside in in this case.

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Joined: 26 July 2007
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Posted: 28 January 2010 at 7:48am | IP Logged Quote oztules

There are a few tons available in one of these if you stumble on one in your travels..... theres one outside my door actually.......

Microwave oven transformers are useful for laminates. Should be plenty of these available over there.

You need to be decent grade poor conducting steel to get the eddy currents down to reasonable levels.

Tinker, I think that that stuff and banding strip are good looking substitutes.... but are very average performers. They were tried with single disk axial flux machines before the dual rotor became common... they do still work to converge the flux.... but are very lossy as the frequency increases.

Insulated steel wire (or tomato wire thrown in a fire to rid the zinc and then left to rust in the weather) does a fair job in this application as well.... the rust is the insulator in this case


Village idiot...or... just another hack out of his depth
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