date: 20-27 APRIL
Location: Scoraig
4 participants built a 2 metre ferrite turbine (2F) for 24-v battery charging. Also balanced and fitted some 3 metre blades to last year’s 3 metre ferrite turbine.
Photo sequence is a bit random sorry.
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- magnet rotor casting
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- magnet rotor reinforced with stainless wire
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- setting up the tail hinge
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- fun with the cat
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- welding under the canopy
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- Sean and James fit the first magnet rotor
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- welding the tail van supports
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- jonathan and blade hub
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- close up
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- the group (Sean, Arshad, Jonathan, James and Hugh)
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- our finished turbine up and working well
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- Balancing the larger 3m blades
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- cutting the slot in a coil winder cheek piece
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- example of corrosion on a NdFe (neo) magnet rotor
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- new blade carving method
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- coil winder
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- Stator winding with 90 turns of 1.6 dia in each coil
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- pouring the stator
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- Setting the tail vane support brackets vertical for tack welding
Hi Hugh! I ave experience with used magnet from magnetron ex microwaye-oven ?
existing method for calculate proiect? Wat it’s grade level of the flux for this anular magnets?
thank you.
Vittorio (Piacenza,Italy)
Here is a post about that subject:
http://scoraigwind.co.uk/2011/07/pedros-microwave-ferrite-magnet-turbine/
Normally I say 150-220mT for the flux, depending on various factors in the design.
Hi Hugh,
What’s the expected power output for this 2F Turbine?
How about 50x50x15 C5 Magnets? Big difference acompared with this ones?
Thanks.
Regards
hi Pedro,
I have had one of this design running all winter and we did some datalogging on it to measure the performance. I would rate it as a 400 watt machine. Sometimes the power output will surge to about twice this much but the maximum sustained/average output is about 400 watts.
You could use 15mm thick magnets yes but it would run a bit fast. You’d have to reduce the air gap to a much closer clearance. You’d probably get acceptable performance with the same stator but I’d be inclined to use more turns of thinner wire for the best output in low winds. And then the maximum output would be lower and the tail would need to be a little bit lighter too.
Hugh