Muller Dynamo

[nul-points]

Dear nul-points,

You surely recall, Romero listed several diode types he tested, see here:

[...]
So the mistery why Romero found the listed Schottky types as worse than the diode bridge with the paralleled 1N4001s is a question to be answered.
[...]
Now trying to answer your question: I think when you substitute the 0.8V drop diode bridge+1N4001 with another diode bridge which has the same voltage drop, 0.8V AND the AC properties of the two are say identical THEN the latter diode bridge should work with the same loss, hence no need for a diode bridge+1N4001s!

[...]
rgds,  Gyula

thanks Gyula

i surely do recall Romero saying that

in fact, when it was originally queried in this thread, i mentioned that not all schottky diodes have a suitably low forward voltage drop

i agree that some schottkys might also be disqualified due to other parameters which make them unsuitable for this application

however, those two facts do not rule out ALL schottkys from being possible replacements for Romero's arrangement


anyway, thanks for giving a straight answer to a straight question about the diode bridges

it's good news that we don't need to waste time adding extra diodes to all our FWBRs, IF we can find a suitable single bridge substitute!


regards as always
np


http://docsfreelunch.blogspot.com

[xenomorphlabs]

@gyulasun

If you find the time, maybe you can try to parallel several diodes (maybe of even many different types) to one leg pair the bridge rectifier and see what effect that would have?
Could it increase the effect you have been observing?

[scratchrobot]

Hmm I tried the inverted top coil also already but it gave less voltage so I thought no good 
Today I tried changing the rotor magnets in a NSNS configuration and made a scope shot, now it looks more like the scope shot of the Kromrey converter 

top is mine, bottom is original.

[minoly]

Hi everyone,

I remembered I had done a video back Dec 13, 2009 to demonstrate the effects of what a set of coils connected in reversed will do.

Link to video: http://www.youtube.com/watch?v=PTykNjDD0CM

It's kind of a long video, so maybe start it @ 3:30 to get to the experiment in question.

Thanks for sharing

Luc

I remember watching that vid when you put it out along with the others.
Is this what John Bedini calls buck-boost on the Kromrey DVD?
From your last vid I could not tell if you ever took it further?
So many things push at derailing my projects I shouldn't even ask

We added another coil in this configuration using a N S magnet arrangement on the rotor and are getting very nice results using Bolt's amplified short. We see nice results using the Cap for AC short as well, but we do not have the right coil to cap "ratio?". Passing the magnets between the coils seems optimal.

Still not there yet Romero to help prove rotor is faster than before adding the coils, but this looks very promising we are getting closer w/ each step and idea coming from here OU and EF as well. we are spinning this w/ JB's SSG which as anyone who has actually worked w/ knows. When you add a load, the amp draw goes down. So the load is free in that regard.

I have to say this is a wonderful community and I don't just mean here @ OU, I'm talking about the entire experimenting community. I've been a member for a couple of years I think but have not posted until recently. Thanks to everyone on all the threads on all the subjects.
Everyone’s' replication matters not just the first one. The more there are the more powerful this will be in the end.
Patrick

PS adding the diodes, increases the output on our build. that is: the voltage goes up while a bulb is connected, and yes the bulb gets brighter. We added these to our little windowmotor build and were able to reduce amp draw as well (you have to understand the bipolar ckt to get that)

[e2matrix]

A question on diodes.  Romeruk said at first he was using 1N4007 diodes but later said it was 1N4001 diodes on top of the FWBR's.  Looking at the datasheets I see NO difference at all between these two other than the voltage rating.  Can anyone comment or speculate on whether there would be an advantage to using the lower voltage rating?