Single Phase Coil Connection Schema

[d1kta]

Hi my friends, i draw six coils single phase coil wire connection schema, is this right?

[Flux]

If that is for a 6 magnet magnet rotor then it is not right. You need to reverse alternate coils.

I will try to explain without a drawing.  Start with your top left coil, you have an inside which becomes one of your output leads. the outside of this one will connect to the outside of the top one. Then inside of top one connects to inside of top right one and so on. If you follow this round correctly the other output lead will be the inside of bottom left coil.

The reason is that for single phase you have one coil over every magnet and the magnet poles are alternately N and S so you need to reverse alternate coils to get the voltage adding, as drawn they cancel.

I hope you can follow this or perhaps some kind person may be able to draw it for you.

Flux

[d1kta]

maybe this time i understand true and i wanna ask question about second output lead which is inside of the red circle, is this output true or false, because in my draw in the red circle i have three connection

[electrondady1]

no your doing double connections
here it is

[hiker]

wind all coils in the same direction--then flip every other coil over and wire all in series..

[Flux]

Thanks to Electrondady for re-drawing it correctly.

Hiker's alternative solution works just as well, in this case the reversal is obtained by flipping the alternate coils, which again changes the induced volts of alternate coils, the effect is the same. Just be careful to be consistent if you use the first method don't flip any coils.

Flux

[d1kta]

And here is the result

First of all i used 1.4 mm diameter copper wire, so its to hard and strong for the winding and later again too hard for the connection with solder.I made all connection for single phase and then i poured the resin.

I used polyester resin and hardener and accelarator, i think i used so much hardener, in the end it became so fragile and cracked.

To sum up, don't use so much thick wire because you wont form very vell, and don't use so much hardener because your alternator wont be long time.

And here are the pictures...

[hiker]

now lets see if its wired right...
hook a battery or battery charger to the output leads...then hold a magnet in your hand and go over each coil..
for six mags it should go like this---repel-attract-repel -attract--repel --attract.
do this quickly so you dont overheat your coils...you could put a 12v headlite in series to take some of the load off the coils............looks good ..just one coil seemed to drift a bit..
how many winds per coil ?  with only six coils it should be  a high number of winds.............good luck..

[Flux]

Resin alone has little strength and will probably crack unless you use the minimum hardener and get a very slow set.

Adding a filler material gives much more strength and slows the chemical reaction, reducing the risk of cracking, it also helps keep the coils cooler with better heat transfer. Suitable fillers are Talc, marble flour or fine chopped glass strand or similar.

What you have achieved looks good and should work. Good luck with it.

Flux

[Harold in CR]

 Will this single phase alternator have a double magnet rotor, one on each side of the stator, or, will it need a plain steel plate on the other side of the stator to complete the flux path?