Muller Dynamo

[k4zep]

Hi Ben

All 7 BR are in paralell connected. I get around 2V for each pair of coils.

0.05 is the current thru all 26 leds

0.18 is the current of the output in dead short

The cap is made of 2   22uF electrolitics cap connected back to back (-++- it should give me an 10-11 uF non-polarised cap)

I'll try to improve something tomorow ; i have the impresion that, becouse the rpm is high, doesnt slow down and my multi meters are not so precise. Anyway, i'll dig into it tomorow

Hi Mariuscivic,

Excellent.  IF you can I highly recommend you get one of those cheep Tac's. from China and they work great.

You are doing excellent work, my ear says you arn't changing more than 5-10 rpm from no load to full short, maybe less!.  GREAT WORK.  Keep at it.

Your drawing made me realize I had made a simple mistake in the winding direction and mounting of one my coils relative to the other, (frackaty frackaty, frackaty.....arrrrrrrr).  Oh, well, 10 more coils to re-wind and mount.  But I quickly wound one of the coils the other way, and with different values because of resistance and inductance,  find that your method works.  That resonating cap has to be the right value to compensate for the change in loading on the coils.  GREAT WORK AGAIN.  Now to get the voltage up.

My quick test from no load to 150 ohm load is 2.21 VDC @ 14.7 ma with 21 RPM decrease under load  1142 base rpm. 150 ma dead short.  I'm not on the money cap wise as I drop about 200 rpm under dead short,  A very quick check.  It is a start.  Thanks for the info again!  This is one coil set.

Respectfully,
Ben K4ZEP

[bolt]

All 7 BR are in paralell connected. I get around 2V for each pair of coils.

This is miles off the beaten track because you should be getting like 18v out of your coils not 2v and about 15v  under load. Needs a plan B.

[nul-points]

This is miles off the beaten track because you should be getting like 18v out of your coils not 2v and about 15v  under load. Needs a plan B.

LOL - plan B was a hundred posts back - we're on plan ZZ now! 

[Artist_Guy]

This is miles off the beaten track because you should be getting like 18v out of your coils not 2v and about 15v  under load. Needs a plan B.

Yeah, but since every other spec has been re-dacted or re-directed, maybe parallel isn't the ticket and series (for all pairs) is, so 2.x * 7 = 14+ into a 12v DC converter into drive coils = ?

Worth yet another goose chase maybe.  I'd do it, but I still don't have my cores cut.

[Dave45]

you can remove this post if u want but anyway Iv noticed if u put an even number of mags around a rotor they attract each other but if u use an odd number the ends repel and u create a gate an when this gate passes the coil it fires higher voltage into the coil , maybe someone can use this.
Dave