Quote from: i_ron on September 23, 2016, 05:53:44 PM

Thanks Chris!  interesting numbers for sure. Math is not one of my strong points so I am amazed at how you do this!!


Now to post mortem this, I was wondering if the flux path length through the laminates was the critical factor? Is this the reason Watson used such long cores in that famous machine???


Anyway, searching for what we learned here and you seem to be able to present this in a very understandable manner... so over to you.


Ron

Hi Ron - I am blushing... I fumble my way through what I can, using the "try and try again" technique... Math is not my strong point, but I try, I find it does help sometimes.

Ron, how would you describe what is going on here? How is it that the Rotor is able to see less drag at higher speeds? Output efficiency increase as the Rotor Speed increases?

I felt that the Rotor was Riding the Magnetic Field, the Magnetic Field from Lenz's Law, the Output Magnetic field from the draw of Current on the Output.


   Chris Sykes
       hyiq.org

Hi Ron - Re Saturation, this is where the Core Material can no longer accept more Magnetic Flux (B).

Like a Sponge can only accept a volume of Water before more Water spills out everywhere, the Core Material will present an easier path for the Flux, measured as the Permeability (μ), but the upper limit of this easier path, is considered to be Saturated. No more Flux cant travel this easier Path because there is no more room, so the Flux Spills out.

This is a very easy experiment to learn about Saturation and the BH Curve: http://www.cliftonlaboratories.com/non-linear_transformer_behavior.htm


   Chris Sykes
       hyiq.org

It looks like a RV,but it is not a conventional motor-generator,it is a controle-device operated generator
https://translate.google.de/translate?sl=de&tl=en&js=y&prev=_t&hl=de&ie=UTF-8&u=https%3A%2F%2Fworldwide.espacenet.com%2FpublicationDetails%2Fbiblio%3FDB%3DEPODOC%26II%3D5%26ND%3D3%26adjacent%3Dtrue%26locale%3Den_EP%26FT%3DD%26date%3D19790215%26CC%3DDE%26NR%3D2733719A1%26KC%3DA1&edit-text=


The controle device,Standart 2016,I would equip with this Tesla-Unit force enhancer :
http://www.google.com/patents/US8514047

Quote from: EMJunkie on September 23, 2016, 06:10:07 PM


Hi Ron - I am blushing... I fumble my way through what I can, using the "try and try again" technique... Math is not my strong point, but I try, I find it does help sometimes.

Ron, how would you describe what is going on here? How is it that the Rotor is able to see less drag at higher speeds? Output efficiency increase as the Rotor Speed increases?

I felt that the Rotor was Riding the Magnetic Field, the Magnetic Field from Lenz's Law, the Output Magnetic field from the draw of Current on the Output.


   Chris Sykes
       hyiq.org

The answer to that is simple.
The already existing eddy currents are being converted to electrical power.
If Ron places a temp probe on the core of the generator,he will find that the temperature of the core will decrease when he draws a load from the generator.

Way to test for this.
1-place a temp probe on the core-or embed the probe into the core if he can.
2-let the DUT run at the best found RPM for 10-15 minutes-or until it reaches peak temperature.
3-once max core temperature is reached,place a load across the generator,and watch the core temperature.

You would think the temperature of the core/generator would go up,but it will go down,as the generator was already under load,and that load was the production of eddy current heating-waste heat.

Well,that is what i have found anyway.


Brad

                         temperature decrease/ tension and frequency behaviour ? linear or progressive ?
                         internal https://en.wikipedia.org/wiki/Eddy_current_brake