Quote from: romerouk on June 08, 2011, 08:32:34 AM
Thank you Gyula to confirm this. It is so easy to test and people still did't try it to see if it is true or false. This can be considered in many applications and do not underestimate that few mwatts extra you get. Diodes can do even more beautiful things...

Have a nice day,
romero

Hi Romero,

Thanks for 'peeping' in... 

For those interested:

A very simple test for seeing forward voltage drop of paralleling some diodes is to use a digital multimeter that has a separate Diode test feature. Just hook up your first diode in forward direction to the meter switched to the Diode test range and note the display: it is calibrated to show the actual forward voltage at a small forward current like 1mA.
Now connect another diode in parallel with the first and see what the display shows now. I always find LESS forward voltage display with two paralleled diodes than with a single one. Because diodes are nonlinear, the voltage drop is not constant it always changes as the current changes. But the behaviour  of getting less drop as a result for paralelled diodes remains at any forward current value the diodes are able to handle.

Gyula

Quote from: romerouk on June 08, 2011, 08:32:34 AM
Thank you Gyula to confirm this. It is so easy to test and people still did't try it to see if it is true or false. This can be considered in many applications and do not underestimate that few mwatts extra you get. Diodes can do even more beautiful things...

Have a nice day,
romero

are you saying that a diode bridge + extra 4 diodes in parallel which gives, say, a total forward voltage drop of 0.8V, is better than a diode bridge alone which already gives a total forward voltage drop of 0.8V?

if you're not saying this then it could be why people didn't bother trying Guyula's test - they're just planning on using appropriate rated schottkys

Quote from: nul-points on June 08, 2011, 09:32:01 AM

are you saying that a diode bridge + extra 4 diodes in parallel which gives, say, a total forward voltage drop of 0.8V, is better than a diode bridge alone which already gives a total forward voltage drop of 0.8V?

if you're not saying this then it could be why people didn't bother trying Guyula's test

Ofc that is what he is saying . No really we should make a new thread and try to extract the basic and very short facts this huge thread has gathered.
If you study diodes you will understand that they are not all the same and putting them in parallel will logarithmically reduce their resistance

If fact this is a known effect to any doped silicon electrical component. The doping is not perfect, the impurities that separate + and - side can vary a bit from each component.

Quote from: penno64 on June 08, 2011, 08:46:36 AM
Hi all,

If I flip my top coils (wires only) I get less voltage and current but the unit accelerates under load.

If I put them back to normal I get more voltage but I feel it acts like a normal
generator and slows under load

Great test Penno

I was going to suggest for someone to experiment with that yesterday. Glad you tuned in without me needing to write it

Maybe with that flipped coil combination the biasing magnets need to be the right strength and rotor at the exact RPM for the power to start Kicking in.

Also experiment with a small .33 AC cap (around this value) between the 2 coils and or diodes.

All the best

Luc

Quote from: romerouk on June 08, 2011, 08:32:34 AM
Diodes can do even more beautiful things...

Have a nice day,
romero

Hint!