been searching the board for coil output. and i did find sum great stuff put there by others thanks guys.
so what is my problem. well i am my own problem as i cant find a coil winding output for all the bits i have .
so ive made a list of all the bits i am putting together.
6 foot prop made from hugh piggot plans . scaled down from 8 foot
9 inch dia x8mm thick rotor one off.
8 n42 magnets 2" x1" x1/2"
6 coils recycled wire.
so its a single rotor and i want it to charge 12 volt.
i have just finished potting the rotor. in mould withh resin etc.
a while ago i stripped a old transformer down and got the wire from it to make coils.
i made coil winder and wound coils .
80 turns 15 awg. its what it said in the book.
but it also said to use n35 magnets. but i got n42 as the price was much cheaper.
i dident go with the plans . couldent aford to as n35 was more expensive.
but to try help things out a bit i used 8mm steel disc 9".
now for the hard bit. what i am doing is just using what i can get and what i have.
so 2 coils each phase 3 phase. star outlet .
so what i will hopefully have is a nice small mill charging at 12 volts and more.
here is my problem.
i put the rotor in the lathe. made up a coil holder and put a multimeter set at ac.
first i wanted to make sure the coils worked ok.
thay did. so what i dont know is are thay giving to much voltage.
to little voltage or maybe i can just make up the stator with the coils as thay are.
coils 1 rpm 165. 1.28 ac rpm 330 2.66 rpm 605.
2 1.32 ac 2.70
3 1.43 3.02
4 1.34 2.70 4.70
5 1.34 2.59
6 1.46 3.09 5.50.
all is at ac
when i tried dc only one coil coil no 4 it gave 4.70 ac but only 4.15 dc 605 rpm.
now to try explain a bit more . four coils wound from 15 awg.
two coils wound from 18awg two in hand. inside transformer this thinner wire was at the bottom.
so at 330 rpm it al adds up at ac over 15 volts not spot on but im happy with my first atempt.
the coils no 3-6 are wound from 18awg and give more power out.
shall i take sum wire of the 18awg so thay give the same volts as the other four.
will less turns make less volts. for the two odd coils.
remember i was lucky to evan get sum coils for nuthing from old trans.
maybe i will get sum help here and can evan things out.
things i dont know are speed at the prop in real winds.
like cut in speed and stall speed not understanding this yet
but from macanical point of view it might work ok.
or can i make this a poll.
all in favour stick it all in the mould and glass it up.
all in favour tweek it up and put in mould.
all in favour put it in the bin.
in my spare time i will cut two 12" discs for twin rotor. but thinks that will be next year sumtime.
so far i have one percent knowledge about windmills. its not a lot. but
when i get to two percent i will know twice as much as i do now.
i just better say i dont mean this to be a real poll. but yah or nay will do fine.
thank you all.