Muller Dynamo

[chalamadad]

Hey Kone & Marius - and then test a few more of those small caps in parallel too!

[mariuscivic]

Hi Kone and Chalamadad

I'm still shorting the coil and trying different coils and caps. What i want to do is filling a my big cap 47000uF/50V. First i was using a 800 turns coil with 0.4mm wire and this was very good only for small size caps. Now i have a small coil 200 turns/0.8mm wire (sewing spol). The small coil produces a little less voltage than the big one but it is charging my big cap. It takes some time to arive at 30V but this is real power since the big cap has also more current in it.
-small coil is generating 3V with no cap and no coil shorting
-small coil is filling the big cap until 9V with no coil shorting
-small coil fills the cap at 9V to 30V in around 1 minute but it doesn't stop there; the cap is still charging but slowly .

The bad thing about big caps is that when connected (even charged to 30V) it creates aditional drag to the rotor.The small size cap (56uF/400V) doesn't create aditional drag. For now i'm shorting only half of sine wave becouse of my magnets from the rotor( the AC sine wawe is a bit different than the clasical AC wave.) I must make another rotor , and the distance betwwen the gen magnets and triggering magnets must be bigger than my curent rotor in order to do the shorting for a smaller period of time

[wattsup]

Hi Kone and Chalamadad

I'm still shorting the coil and trying different coils and caps. What i want to do is filling a my big cap 47000uF/50V. First i was using a 800 turns coil with 0.4mm wire and this was very good only for small size caps. Now i have a small coil 200 turns/0.8mm wire (sewing spol). The small coil produces a little less voltage than the big one but it is charging my big cap. It takes some time to arive at 30V but this is real power since the big cap has also more current in it.
-small coil is generating 3V with no cap and no coil shorting
-small coil is filling the big cap until 9V with no coil shorting
-small coil fills the cap at 9V to 30V in around 1 minute but it doesn't stop there; the cap is still charging but slowly .

The bad thing about big caps is that when connected (even charged to 30V) it creates aditional drag to the rotor.The small size cap (56uF/400V) doesn't create aditional drag. For now i'm shorting only half of sine wave becouse of my magnets from the rotor( the AC sine wawe is a bit different than the clasical AC wave.) I must make another rotor , and the distance betwwen the gen magnets and triggering magnets must be bigger than my curent rotor in order to do the shorting for a smaller period of time

@mariuscivic

Instead of 200 turns, what would happen if you started to play the numbers and the layers. Here are two examples.

1) Take 10 wire lengths bunched together and wind 20 turns.
2) Take one wire and wind layer 1, then another wire and wind layer two but in the other direction. Then layer #3 wound as #1. Then layer #4 as #2. Put the evens numbers in parallel or series and put to one tank cap. Do the same for the odds numbers on another cap.

The other thing I was thinking about lately was this.

Let's say you keep your set-up as is. But now you get 4 or 5 very small N/O reed contacts that are positioned anywhere convenient around the wheel so that each one gets latched one after the other. So you put each fill up reed to one each capacitor and all connected in parallel to the output coil. On that same parallel you put a last N/O reed that goes to load and that reed is positioned so it always latches after the 4 or 5 fill up reeds. This will permit to charge 4 or 5 capacitors and discharge them at once without using electronics. This is just a rough description. Anyways, I think you get the idea.

Keep up the good work.

wattsup

[konehead]

Hi Mariu
In that cap discharge formula, you can see the factors of how much power you get out of the cap are:  the size of the cap, the voltage drop of cap (depends on reisvive load and also pulse width too) and also the RATE of the discharges per second....
For sure a small cap fills way faster, and doesnt affect draw like a big cap will in peak coil shorting as you mention too,  but in consequence, you dont have as much power stored in cap since cap is so small - so to compensate for this, make the discharge-rate much faster....cap is filling faster, so you can then get more discharges out from it too....
you can get a pure sinewave with all-N magnet rotor - have twice as many aircored coils in stator plates as you have rotor magnets - for example if your rotor is 6 magnets at 12, 2, 4, 6 and  8 o'clock,
then have 12 aircoils at 1,2,3,4,5,6,7,8,9,10,11, and12 oclock in the stator plate.
connect coils 1 and 2, 3 and 4, 5 and 6, 7 and8, 9 and 10, 11 and 12 IN SERIES....connect the OUT of the coil A to the OUT of the coil B....sinewave shows up on the IN of coil A and the IN of Coil B
I call this "backwards adjacent series"
This will give you perfect AC sinewave, also doubles the frequency too which is really cool - now you have 4 sinewaves per magnet-sweep of the two coils to short.....

[mariuscivic]

Hi Wattsup!
I would like to try your ideea but unfortunatlly for me is difficult to build multifillar coils. It takes a lot of time and work since i dont have any "hi-tech equipment" for winding coils. I might try what you described but not now. Thanks! 

Konehead
For now i'm not going to do any calculation about in and out.
I was going to build another rotor with 16 mags N-S  but your ideea is good.
I'm a bit disapointed about the drag when i short the coil. Is not much but is there slowing the rotor. Do you have any drag when shorting? My shorts are around 200-300uSeconds.
Also you said to use aircore coil; do you use aircore coils? Is this the way to avoid drag?
When i spin the rotor around 3000rpm the shorting gen coil produces a lot of juice; is this only becouse the coil produces more or becouse is beeing shoeted for less period of time?