Practical build log generator Figuera

[Lasco]

why do you think it failed the first time, second time, and so on? What did you change each time?

I have gotten confused with toroidal rather than using resistance, then I have used cores that had small relative permeability, and then I did all this work assuming "Y" has a metal core.
Then next was again not enough electromagnetism....

This time I have purchased book about practical Dynamo building from 1893 -https://www.amazon.com.au/Practical-Dynamo-Building-Drawings-Instruct/dp/B074BN8M3L/ref=sr_1_1?crid=3338AYV1FK3Z1&dib=eyJ2IjoiMSJ9.tSxZI_DcC6ydiMoWulo8myuaNo6S0GcNN1eAfzBhIhiubpI75qqd9J4RDieJEztF0_QbS-hKnVVNse1REpOOe_CVThDLWtVkQo3ibMSZy5FkyV4TjfuGtViuxQnyuOVARn_NHHEENvfZ4slMx1IN9w5_MUk96Te9_xeN2i4dvunIGnonPxXYf0tA1GRDLOJSpmxqXHCBuj98SEdCyqChGzqQIvsH7AlD26w6_8SmpSYJCwKxORyrv2sfW2-fvcogozSKbEk3MEsHI7TBXb3lOr1HoAqUoxtJAVfOAuwcDRc.NPGTqNAZsphs9tbzLQFV9hmpSYpqXX__b6gHGG_c_d8&dib_tag=se&keywords=practical+dynamo&qid=1711873323&sprefix=practical+dynamo%2Caps%2C274&sr=8-1

https://www.mooker.com/attachment.php?thumbnail=783

it says exactly the wording as per Figuera Patent That commonly used rheostat for controlling primary coils current - hence controlling the output power of the dynamo.

It is easier each time a new build ........

[Jim Mac]

why do you think it failed the first time, second time, and so on? What did you change each time?

My personal opinion is we fail because we do not use nearly enough contacts to make the wave smooth. We see 16 contacts on the drawing, so we make it with 16.  But nowhere in any patents does it say "16".  I wouldn't be surprised if we need hundreds of contacts / resistor points.

But that's just my opinion.. 

Why would you consider closing the thread?  You got us watching...

[Lasco]

I have tested coil with various voltage and measured magnetism 
Not happy with results 
To much heat and not enough magnetism 
Must rewind coil for new testing

[Lasco]

some pictures from new build
Coils are driven with 24V dc 
Thanks Jim for advice to use battery, it does give me some better results 

Interesting is that on primary is Vpp 420V and Battery is only 24V
It gives output  128Vpp or 44.8Vrms from induced coil ( nothing special just for testing 800turns 0.6mm wire)
This needs to be worked on 
Pay attention to primary coils on one picture is scope probe on “S” and other picture is probed “N” that is blue tracer and yellow is output
There is definitely some sort of exchange of energy between these two coils 
           
Picture of part G with resistance on the commutator     

Voltages measured      
It is V rms from induced 
           

   
BEMF leaves its marks on commutator - Timing is Upmost importance - no good timing results in lots of sparks good timing no sparks
I can state with confidence that it is BEMF as driving force behind Figuera Generator

[lfarrand]

I can state with confidence that it is BEMF as driving force behind Figuera Generator

When you say BEMF, do you mean inductive kickback / flyback, or BEMF as in Lenz's law?

Your photos show some charring & damage to the copper commutator. This damage appears at the edge which means it happened just before contact between the brush and commutator was lost, so I think you're referring to inductive kickback.

[Lasco]

Hi Jim
Yes it is energy that is stored in inductor and is directed into other  inductor
This is the device that is omitted from patent pictures
Small square with three lines there is easy damaged commutator if not adjusted correctly  
Once adjustment is spot on triplets are purring like happy cat

---

Also I must admit that I was trying higher voltage like 48V and then it become sparking like teslacoil
Fine balance will be taking time to achieve
Also test has been done only on one set of triplets

[Jim Mac]

Hi Jim
Yes it is energy that is stored in inductor and is directed into other  inductor
This is the device that is omitted from patent pictures
Small square with three lines there is easy damaged commutator if not adjusted correctly  
Once adjustment is spot on triplets are purring like happy cat

---

Also I must admit that I was trying higher voltage like 48V and then it become sparking like teslacoil
Fine balance will be taking time to achieve
Also test has been done only on one set of triplets

Good morning Lasco.  I believe Iffarand asked the BEMF / Flyback question..

When you get time,  can you draw out and explain each part in detail?  I am impressed with your wave output but do not really understand all what your doing yet..

Keep up the good work man-  We will get it working!  Either the Figuera method or another rotating method!

[Lasco]

Good morning Lasco.  I believe Iffarand asked the BEMF / Flyback question..

When you get time,  can you draw out and explain each part in detail?  I am impressed with your wave output but do not really understand all what your doing yet..

Keep up the good work man-  We will get it working!  Either the Figuera method or another rotating method!

Escumo posted his drawing that is in principle the same way I have did it

The difference is that ”ticker” is half split commutator distributing positive energy between coils and 
Classic G gets negative on the brush
Therefore there is no change in polarity 
Timing is drawn correctly brush O must be in the middle of resistance to coincide with split on commutator “ticker”

And primary coils are Producing opposing magnetic fields 
One is North and other is South 

Induced is between  
There is still numerous other factors that affect this like coil properties speed of turning distance between primaries wire thickness, resistance on the commutator ( I have used 0.1 ohm each) 
I’m not sure about final results but so far I have achieved better results than in last Several years 
In this configuration - let me describe my way it works with alternate switching Primaries and their energy on switching off is transferred into other side and then back
Don’t worry all will be bench tested with your help and experience

[Lasco]

   

This is connected this way 

   

Primaries are rather large 

   

Trying to set something smaller 

   

[Lasco]

I can state with confidence that it is BEMF as driving force behind Figuera Generator

When you say BEMF, do you mean inductive kickback / flyback, or BEMF as in Lenz's law?

Your photos show some charring & damage to the copper commutator. This damage appears at the edge which means it happened just before contact between the brush and commutator was lost, so I think you're referring to inductive kickback.

with BEMF i mean - Electromagnetic force back discharge with of electromagnetic radiant energy , you can name it as you wish , important is that this is happening 

https://www.youtube.com/watch?v=aSmMFog10D0

https://www.youtube.com/watch?v=xxls1VSYBII