Motor-Generator

[Jdo300]

Здравствуйте gotoluc.
Я могу только сказать, что я видел проведения экспериментов.
Чем меньше расстояние от магнита к катушке, тем точнее вы должны сделать все.
У меня было много неудачных экспериментов, которые связаны с не должным образом обернуты и дизайн геометрия.   Я также сомневаюсь, что такая мелочь может повлиять на результат, пока я не увидел обратное.
С уважением Мирослав.

Hello Miroslav13,

I have a strong suspicion that the speedup effect may be more related to the reactance of the coil rather than the core shape alone. can you tell us what the inductance and resistance of the toroidal coil is from your second demo video? This would help a lot to understand what is happening. It could be that the phase shift between the voltage and current through the coil is closer to 90 degrees, which could provide enough of a phase lag to cause the reduction in drag that you are observing.

With this information, we can also compare the inductances and resistance of gotoluc and cristopalba's coils to see if there may be a pattern.

@ cristopalba,

Can you also post your inductance and resistance values? This could provide valuable information to understand what is happening here.

Thanks,
Jason O

- Jason O

[gotoluc]

Hi Jason,

the inventor does not write or speak English. So if you ask a question keep it to minimum words and use google translate to Ukrainian.

About phase shift. I'm quite familiar with how to make a coil that will create it because I also work with Thane. However,  I'm quite positive the Ukrainian inventors coil does not have enough wire turns to create the self capacitance that is needed to cause a shift and mostly at the low rpm they are using in their demos.
A low frequency (rpm) will need such a high self capacitance to cause a worth while phase shift that the coil size is impractical and also causes a low power output.

I'm presently working on fine tuning coils that has most self capacitance and inductance with minimal copper and resistance.
Core losses are also another big consideration.

Anyways, all this was not mentioned by the inventor and his coil does not at all look like a high capacitance coil. It actually looks like a low voltage high current coil if you ask me and is why I did not include the above in my replication.

Luc

[gotoluc]

Why this strange freq? Pretty high for measuring this kind of stuff...
Reading may be a bit off.

Anyway lets say its correct - then XL is about 5.5...6.7ohms at your working freq (about 300Hz?).
Not the worst coil in the world. Q about 2.5...3.
But the effects I was talking about take place at much higher Qs - phase angle should be 85'+
Quite problematic to achieve with this small half-toroid.

So in that sense it is not correct replication... unless I'm totally overlooking something.
For example in original video the magnet clearly has very small effect on half-toroid inductance
becuse toroid is huge and magnet is pretty small and far away.
In your case the inductance difference is probably large in 0' vs 90' positions.

I think setup would behave as in Miroslav13 video when there would be:
- large phase shift >85'
- neglible change in half-toroids inductance in 0' vs 90' positions
- lossy core

Hi yssuraxu_697,

thank you for all your posts and details.
I can see you're very knowledgeable and if you have recommendations please post them and I'll see if I can try them out.

Luc

[Jimboot]

Hi Guys,
If you have a closer look at the numbers I think you will find it to be that the flux from the current draw is masking the iron core. I found the same here https://www.youtube.com/watch?v=ASbXw3RkAHA with that experiment but it was pointed out to me that it was probably just the core being masked.

[gotoluc]

Hi Guys,
If you have a closer look at the numbers I think you will find it to be that the flux from the current draw is masking the iron core. I found the same here https://www.youtube.com/watch?v=ASbXw3RkAHA with that experiment but it was pointed out to me that it was probably just the core being masked.

Hi Jimboot,

I don't know about masking cores. What I do know is, if you connected a 2 channel scope with ch1 across a current sensing resistor (csr) to your Rodin coil and ch2 across another csr to your bifilar coil, when under load (charging cap) you will see a phase shift between the two currents.  It's this phase shift that's assisting the magnet rotor caused by a delay in CEMF in the bifilar coil core and allows most of the magnet re-attraction time (Lenz effect) to be removed.
As you can see the effect reduces as the cap voltage climbs and you see the current draw (Rodin coil) start to increase and you can also hear the rpm slowly dropping.
To maintain best efficiency of this effect one would want large cap values and keeping them at low voltages (cap dumps)

How does this sound compared to core masking?

Luc