Muller Dynamo

[mariuscivic]

Hi wattsup
Are you suggesting to connect another coil in series with the drive coil and keep it away from the rotor?

[wattsup]

Hi wattsup
Are you suggesting to connect another coil in series with the drive coil and keep it away from the rotor?

Yes, that's it. The added coil is not there to push anything. Just beside or near the drive coil so the pulse goes through the drive coil and will land inside the added coil. Hopefully the added coil will have the same or more winds, or inductance then the drive coil. You can even use the secondary of a small transformer or even the primary if the inductance is high enough.

Keep well.

wattsup

[konehead]

Hi Mariusivic

you need very short pulse width for sure. I use very very small neo magnet in a timing disc and if I want more pulse width I simply but some more side by side in the timing disc.
I get 1ms pulse width in what I am doing right now with approx 7 inch wide timing disc if using only one small magnet against a halleffect.

These small timing magnets are 1/16th inch wide and 1/4 inch long - so about 1.5mm wide approx and about 6mm long.

Shorting coils is good thing to do at the peaks since it makes for a big expolsion of power in very brief time (when switch opens) similar to backemf/recoil filling caps....so this is something that needs very short pulse width in first place, and the "teeter totter" peak period only gives you a very short pulse width to play with.

Also putting two swtiches in series, and you can control pulse width that way...fairly far apart would be very short pulse width - closer together would be larger pulse width...

reed switches are no good for any precise timing - they have that double pulse from the timing magnet's front and back edges as you saw in that scope shot you put up a couple weeks ago....you need to use unipolar halleffect that only trips from only N or only S side of timing magnets....

thats a neat idea Wattsup has in dividing up the period before the peak into 2 caps but dont know if it will work or not.....
All you want to do with a generator coil is FILL A CAP.

A coil filling up a cap-only IS non-reflective, (no lenz law lugging)  just as long as your UF value of cap isnt too large.

put a 1uf DC cap across a generator coil after a FWBR...filling it up is not going to affect draw a single bit, so you could say "no lenz" if you want....

try a 10uf...probably still wont affect draw too...try a 50uf,,,maybe slight bit of extra draw no (maybe) ... then try 100uf - now probably some extra draw happens...etc etc etc...find biggest size possible that coil will fill up without affecting draw to motor and that is what you want to "work with"

ONce you find that cap size, then short the coil at that peak period, and fill up that cap 20 times faster and higher in voltage.

Taking power OUT of caps filled by coils is easy squeezy - (disconnect cap from coil when cap hits load)

What Wattsup mentioned about nothing great in sinewave peak chopping is true, IF you have resistance across your cap at same time as it fills up....but dont do that eh.

[konehead]

Hi all

I drew up some circuit drawings again, showing how to take backemf/recoil out of a pulsed DC coil using NPN mosfet and single diode

(if PNP have instead ground of cap and drain of mosfet connect and diode then goes other way to positive of cap
plus source of mosfet goes to postive instead of ground)

the 2nd drawing shows how to do the same thing, but this SWITCHES the diode into the cap in this circuit - I get "speed up "of motor from 840rpm to 1000rpm with also 6 ohm "optional" resistor directly across cap as shown which is interesting thing - and next step is to get rid of that resistor, and fill very large uf DC cap, that is running another 2nd pulsed-DC motor circuit....then the 2nd motor circuit also has this "switched" backemf/recoil recovery circuit on it too, and the power recovered from that dumps back into a large DC cap that is running the motor coil circuit #1 for a looped system
RomeroUK machines with their two out-of-phase motor coil circuits is ideal for this...

[konehead]

Hey Wattsup

here is your quote:

"But in a nutshell, let's say the gencoil goes from 0 - 10 (peak) in 1 second, so you want to take out the peak, you will open a transistor for a fraction of that second when it is at peak. "

No, you dont want  "take out" the peak, that is when you want to capture voltage into cap!

So you CLOSE a transistor only at the peak-period (not open it)...but leave transistor open (OFF) rest of time.